ATTACHMENT TO RESULUTION No. 473, 27 OF JULY 2007
USER INTERFACE – NETWORK, AND PUBLIC SWITCHED
TELEPHONE SERVICE TERMINAL REGULATION
TITLE I
GENERAL PROVISIONS
Chapter I
Purposes
Art. 1 This Regulation establishes the technical, functional, and signaling characteristics between
the terminals and the telecommunications network supporting the Public Switched Telephone
Service – STFC(PSTN), destined to the public use in general, using telephony processes for the possible
combinations in analog and digital environments.
Art. 2 This Regulation also establishes the technical, functional, construction, and signaling
characteristics of the terminals to be used by the STFC(PSTN), as well as the requirements necessary to
their certification and corresponding testing procedures.
Chapter II
General Provisions
Art. 3 The interfaces described in this regulation are those destined to interconnect, with the support
network to the STFC, the terminals which are provided with the following:
I – analog interfaces for voice terminals with decadic or DTMF signaling, data terminal with
transmission in the voice bandwidth, and caller access identification terminal;
II – digital interfaces for data terminal with access at 64 kbit/s.
Art. 4 The terminals should fully meet the specifications contained in this Regulation, as the basic
condition for their certification and integration with the STFC( PSTN).
Chapter III
Definitions, Symbols, and Abbreviations
Section I
Definitions
Art. 5 For the purposes of this Regulation the following definitions are adopted:
I – 2B1Q Coding: denomination of the 2 BYNARY 1 QUATERNARY line coding, by means of
pulse amplitude modulation (PAM) with four levels, without redundancy;
II – Noise Criterion: weighing criterion for measuring the environment noise, according to ISO/IEC
226;
III – DTMF (Dual Tone Multi-frequency): Multi frequency signaling based on a pair of tones;
1
IV – Data Communication Equipment (ECD): equipment to provide all functions
required to set up, keep, and release a connection, proceed with the adjustment and coding of the
signal between the data terminal interface and the telephone line;
V – Data Terminal Equipment (ETD): equipment formed by a data generator and/or receiver;
VI – Voice frequency range: frequency range between 300 Hz and 3400 Hz;
VII – Identification of the caller access: Information sent by the destination switching exchange to
the called subscriber over the DTMF signaling, corresponding to the identification of the caller
party
category and access code;
VIII – Noise Range: gain or attenuation level imposed to the normal noise level;
IX –LRGP Position: Position that the voice terminal handset should assume for using the
electroacoustic tests, according to Attachment C of ITU-T Recommendation P.64;
X – Mouth Reference Point: a point located 25 mm ahead of the lips in the horizontal axis that
passes through the center of the mouth opening, according to Figure A1 of IRU-T Recommendation
P-64.
XI – Test standard 511: a pseudorandom bit stream with 29-1 in length that corresponds to 511 bits,
according to ITU-T Recommendation O.150;
XII – Terminal: Equipment or set that enables the user access to the STFC;
XIII – Duplex transmission: data transmission that occurs simultaneously in the two directions.
Section II
Symbols
Art. 6 For the purposes of this Regulation the symbols indicated in Figure 1 are adopted:
Section III
Abbreviations
Art. 7 For the purposes of this Regulation the following abbreviations are adopted:
I – BAL: Longitudinal balancing;
II – dBm: decibel relative to 1 mW;
III – dBmp: dBm measured with psophometric weighing, according to ITU-T O.41
Recommendation;
IV – dB Pa: decibel relative to 1 Pascal (Pa);
V – dB Pa(A): decibel relative to 1 Pascal measured with weighing A, as provided in Standard IEC123;
VI – dB SPL: decibel relative to 20 µPa;
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VII – dB SPL(A): decibel relative to 20 µPa measured with weighing A, as provided in Standard
IEC-123;
VIII – dB V: decibel relative to 1 V;
IX – LRGP: Loudness Rating Guard-Ring Position, according to provisions of Art. 5. X – PRB:
Mouth Reference Point;
XI – Rf: variable resistor used to limit the link current;
XII – Vbat: Exchange battery voltage;
XIII – Vef: RMS volts.
Resistor
Variable resistor
Capacitor
Inducer
Direct current power supply
Sinusoidal generator
Square Wave Generator
Generic Meter
Digital Oscilloscope
Switch
Ground
Figure 1 - Symbols
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TITLE II
SERVICE REQUIREMENTS
Chapter I
User Interface Technical Specifications = Network for the Analog Access to STFC
Section I
General Provisions
Art. 8 The STFC(PSTN) support network should provide all terminals with the possibility of receiving and
originating calls, and with the equipment to receive and handle decadic signaling as multi-frequency
signaling.
Art. 9 When a STFC(PSTN) terminal has the caller access identification facility, the STFC support network
should be able to send, over the DTMF signaling, the caller terminal identification to the called
terminal.
Sole paragraph. The caller access identification should not be sent to the called access when the
caller access user has the Caller Subscriber Identity Restriction facility.
Section II
User Signaling
Art. 10 The signaling sent to the user should show the characteristics indicated in Table 1.
Table 1 - User Signaling
Type of
Signal
Dial
Call Control
Busy
Inaccessible
Network
Inaccessible
Code
Visual Form
(Written
Message)
Dial
Calling
Busy
Audible Form
Presence
1000±100 ms
250±25 ms
Absence
Presence
Continuous
4000±400 ms 1000±100 ms
250±25 ms
250±25 ms
Absence
Frequency
4000±400 ms
250±25 ms
425±25 Hz
425±25 Hz
425±25 Hz
Unavailable
500±50 ms
500±50 ms
500±50 ms
500±50 ms
425±25 Hz
Inaccessible
250±25 ms
250±25 ms
750±75 ms
250±25 ms
425±25 Hz
Art. 11 The call signaling sent to the user terminal should have the following characteristics:
I – sinusoidal voltage of 70 Vrms to 90 Vrms superimposed to the power supply voltage with a
maximum distortion of 15%;
II – frequency varying from 15 Hz to 30 Hz, with a signaling sending period of 1000 ± 100 ms,
followed by a silence period of 4000 ± 400 ms.
III – The call signal presentation time should be at least 60 seconds, counted from the beginning of
its presentation to the user.
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Section III
User Signaling - Network
Art. 12 The multi-frequency signaling, present in the user interface – network should show the
characteristics specified in Tables 2 and 3.
Table 2 – Multi-Frequency Signaling – User to Network Direction
Multi-Frequency Signaling – User to Network Direction
Signal
Frequency
Low Group
High Group
Signaling Program
Frequency Tolerances
High Group
(above 1 kHz)
Frequency
Power Level
Low Group
(below 1 kHz)
Signal Duration
697, 770, 852, 941 Hz
1209, 1336, 1477, 1633 Hz
697
770
852
941
1209
1
4
7
*
1336
2
5
8
0
1477
3
6
9
#
1633
A
B
C
D
(1)
± 1.5%
-8 dBm ± 3 dB
(2)
-10 dBm ± 3 dB
$50 ms
Pause Duration
$50 ms
Signaling Speed
120 ms / Digit, Mínimum
Notes:
(1) The frequency of 1633 Hz is considered a reserve;
(2) The high group frequencies should be emitted with a Db level (2 ± 1) above the low group
frequency level.
Art. 13 The decadic signaling, present in the user interface – network is generated by the user
terminal and should show the characteristics specified in Table 4.
Art. 14 The STFC(PSTN) support network should meet the following time characteristics to recognize the
event, resume the dial or mark tone:
I – T ≤ 140 ms, it should not recognize the event;
II – 140 ms < T < 220 ms: It may or may not recognize the event;
III – 220 ms ≤ T ≤ 320 ms: It should recognize the event;
IV – 320 < T ≤ 500 ms: It may or may not recognize the event;
V – T > 500 ms: It should not recognize the event.
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Table 3 – Multi-Frequency Signaling –Network to User Direction
Multi-Frequency Signaling –Network to User Direction
697, 770, 852, 941 Hz
Low Group
Signal
1209, 1336, 1477, 1633 Hz
Frequency
High Group
697
770
852
941
Signaling Program
Frequency Tolerances
High Group
(above 1 kHz)
Frequency
Power Level
Low Group
(below 1 kHz)
Sending Time and Signal Interval
(pair of frequencies in the line)
Signal Rejection
1209
1
4
7
*
1336
2
5
8
0
1477
3
6
9
#
1633
A
B
C
D
± 1.5%
-8 dBm ± 3 dB
-10 dBm ± 3 dB
Signal duration: 70 ms ± 20%
Interval between signals: 70 ms ± 20%
The user terminal should reject the signals
with duration ≤ 10 ms
Table 4 – Decadic Signaling
Decadic Signaling
Frequency
10 ± 1 Pulses per second
Ratio between the Nominal
Opening/Closing Times
2:1
Individual Opening Time (ta)
58 ms ≤ Ta ≤ 77 ms
Individual Closing Time (tf)
28 ms ≤ Tf ≤ 40 ms
Interdigital Pause (Pi)
700 ms ≤ Pi ≤ 1300 ms
Current During the Link Opening
≤ 1 mA
Art. 15 The terminal link closing event should or not be recognized when an open link to a closed
link transient is within the following time intervals:
I – T ≤ 16 ms: It should not recognize the event.
II – 16 ms < T ≤ 160 ms: It may or may not recognize the event;
III – T > 160 ms: It should recognize the event;
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Art. 16 The terminal link opening event should or not be recognized when an closed link to an open
link transient is within the following time intervals:
I – T < 320 ms: It should not recognize the event.
II – 320 ms ≤ T ≤ 500 ms: It may or may not recognize the event;
III – T > 500 ms: It should recognize the event;
Section IV
Terminal Power Supply
Art. 17 The STFC(PSTN) carrier should provide the power supply to operate the terminals, considering the
alternative to provide power supply over the user environment as well.
§ 1 The power supply voltage provided by the STFC(PSTN) support network for the operation of the
terminals that need it should be (-48 ± 4) Vdc, provided by the power supply of 2 x (170 to 300 Ω).
§ 2 The power supply voltage provided by the user environment should meet one of the following
options:
I – voltage of -48 Vdc ± 25%, with the positive grounded;
II – voltage of 110/127 Vac or 220 Vac ± 15%, 60Hz ± 5%.
§ 3 The power supply of the terminals connected to the STFC through wireless fixed access systems
should be provided directly by the Access Terminal Station (ETA), considering the provisions
established in the previous paragraphs.
Art. 18 The total telephone line voltage between wires a and b, including the power supply voltage
and the call signaling voltage should not exceed a peak of 180 V.
Art. 19 The closed link current should not be equal to nor higher than 20 mA, for a 3 km subscriber
line, with a conductor of 0.40 mm in diameter, Resistance of 280 Ω/km and Capacitance of 50
nF/km.
Section V
Service Provision for the Partial Hearing Disabled
Art. 20 The voice terminals for the partial hearing disabled should be equipped with devices capable
of permitting the use of voice terminal by users using hearing aid devices, in accordance with the
technical requirements established in Art. 49 of this Regulation.
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Chapter II
User Interface Technical Specifications = Network for the Digital Access to STFC
Section I
General Provisions
Art. 21 The STFC (PSTN)support network should provide all terminals with the possibility of receiving and
originating calls.
Section II
Line Signaling
Art. 22 he line tone in the user interface – network should be the 2B1Q type, as specified in
standard ANSI T1.601 for 2-wire duplex operation.
Art. 23 The signaling, present in the user interface – network is sent over a 16 kbit/s signaling
channel in accordance with ITU-T Recommendation Q.921.
Section III
Terminal Power Supply
Art. 24 The power supply of the terminals that use the user – network interface for digital access to
the STFC(PSTN) should be in accordance with the provisions of § 2 of Art. 17.
TITLE III
CERTIFICATION REQUIREMENTS FOR TERMINALS WITH
WITH ANALOG INTERFACE TO THE STFC
Chapter I
Requirements Common to All Terminals
Section I
General Requirements
Art. 25 In addition to the requirements provided below, those established in Chapter I of Title I
should also be observed for certification purposes.
Section II
Connection Requirements
Art. 26 The terminals should interconnect to the STFC through a 6-position miniature female
connector, as specified in document “FCC 47, § 68.500 clause (b)”, or through a 6-position
miniature male connector, as specified in document “FCC 47, § 68.500 clause (a)”.
§ 1 The connector terminals should follow the arrangement shown in Table 5.
§ 2 The terminals without connectors of the type described in this article should be supplied with
adapter cable capable of enabling the conversion of the output interface into that specified in this
article.
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Table 5 – Connector Terminals
Contact number
Function
1
2
3
Line connection
4
Line connection
5
6
Section III
Signaling Requirements
Art. 27 The decadic signaling emitted by the terminal should be composed of a pulse train capable
of interrupting the telephone line circulating current in a number of times equal to the activated
digit, whereas digit 0 corresponds to 10 pulses.
Sole paragraph. The signal characteristics should satisfy Table 4, and for each voice terminal the
average receiving capsule level during the sending of pulse train should be audible.
Art. 28 The multi-frequency signaling emitted by the terminal should be composed of a pair of
frequencies emitted simultaneously according to Table 2, and have the following additional
characteristics:
I – for a voice terminal, the multi-frequency signaling signals sent to the line should be audible
through the receiving capsule;
II – for a voice terminal, the voice signal attenuation in the line, coming from the emitting capsule
during the sending of multi-frequency signaling, should be greater than or equal 40 dB;
III – the total power level of the spurious components measured in the range of 300 Hz to 3400 Hz,
should be 20 dB lower than the power level of the essential frequency of the group below the signal;
IV – the level of any undesirable individual frequency measured in a bandwidth of 100 Hz, should
not exceed 33 dBm, within the range of 300 Hz to 3400 Hz.
Section IV
Electric Requirements
Art. 29 The terminal should operate correctly when powered by the telephone line, as specified in
Art. 17, regardless of the line polarity, and with lines up to 840 Ω link resistance.
Art. 30 The terminal should meet the following resistance limits in direct current:
I – with the link closed, the resistance should be smaller than or equal to 400 Ω, measured in the 20
mA link condition, and in the maximum possible link current. This item is not applicable to the
terminal having the exclusive function of identifying the caller access;
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II – with the link open, the resistance should be greater than or equal to 0.1 MΩ, when the terminal
is powered with a voltage of 48 V.
Art. 31 In the open link condition, the terminal should meet the following impedance limits:
I – when submitted to a sinusoidal voltage of 70 Vrms and frequency of 25 Hz superimposed to 48
V, the impedance module should be greater than or equal to 4 kΩ;
II – within the frequency range of 300 Hz to 3400 Hz, the impedance module should be greater than
or equal to 10 kΩ, measured with a voltage of 0.388 Vrms (-6 dBm at 600 Ω).
Art. 32 The terminal Longitudinal Balancing, in the open and closed link conditions, should be
greater than or equal to:
I – for data terminal:
a) 46 dB in the rage from 60 Hz to 600 Hz;
b) 52 dB in the rage from 600 Hz to 3400 Hz;
II – for all but data terminals:
a) 40 dB in the rage from 60 Hz to 600 Hz;
b) 46 dB in the rage from 600 Hz to 3400 Hz.
Art. 33 The terminal Return Loss with relation to 600 Ω in the range of 600 Hz to 300 Hz,
measured with a voltage of 0.388 Vrms (-6 dBm at 600 Ω), with a link current varying from 20 mA
to the maximum possible link current, should be greater than or equal to:
I – for data terminal: 16 dB;
II – for further terminals: 14 dB.
Sole paragraph. This item is not applicable to the terminal having the exclusive function of
identifying the caller access.
Art. 34 The Psophometric Noise produced by the terminal, in the open and closed link conditions,
without transmitting signals, should be smaller than or equal to:
I – for voice terminal and caller subscriber identifier: -64 dBmp;
I – for data terminal: -70 dBmp.
Section V
Electromagnetic Compatibility Requirements
Art. 35 The terminal should meet the provisions prescribed by the Regulation for the Certification
of Telecommunications Equipment with regard to the Electromagnetic Compatibility.
Sole paragraph. The emission of electromagnetic disturbances is not applicable to subscriber
telephones.
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Section VI
Electric Safety Requirements
Art. 36The terminal should meet the provisions prescribed by the Regulation for the Certification of
Telecommunications Equipment with regard to the Electric Safety.
Chapter II
Specific Voice Terminal Requirements
Section I
Signaling Requirements
Art. 37 The audible warning for the voice terminal should be activated when the terminal is
submitted to a call signal, as specified in Art. 11, for lines with 0 to 3 km, having up to 4 terminals
connected to the subscriber line.
Art. 38 The dial or mark tone resuming facility pulse, when any, should correspond to an link
opening for a period of 270 ± 50 ms. During the link opening, the circulating current should be
smaller than or equal to 1 mA.
Section II
Electroacoustic Requirements
Art. 39 The voice terminal electroacoustic characteristics should be met when the terminal is
provided with a 48 V power supply, bridge of 2x250 Ω, 2 x inducers with a value greater than or
equal to 5 H, and a subscriber line with a 0.40 mm diameter (280 Ω/km, 50 nF/km) conductor.
Art. 40 The voice terminal should meet the following Sound Index characteristics:
I – The Emission Sound Index should be between +3 dB and +14 dB, for a line with 0 and 3 km in
length;
II – The Reception Sound Index should be between -10 dB and +1 dB, for a line with 0 and 3 km in
length:
III – The Local Masking Effect Sound Index should be greater than or equal to +7 dB, for a line
with 0 and 3 km in length.
Art. 41 The voice terminal should meet the following frequency response characteristics for a 0 km
subscriber line:
I – the emission frequency response curve should be within the limits of Figure 2;
II – the reception frequency response curve should be within the limits of Figure 3, measured with
the artificial ear specified in Standard IEC-318.
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Figure 2 – Emission Frequency Response Curve
Figure 3 – Reception Frequency Response Curve
Art. 42 The total harmonic distortion, measure for essential frequencies within the rage varying
from 300 Hz to 3400 Hz, with a 3 km line, should be:
I – in the emission: At least 25 dB below the essential component level, measured in the voice
terminals, with an acoustic stimulus of -4.7 dB Pa at the mouth reference point.
II – in the reception: At least 30 dB below the essential component level, with an electric stimulus
of -18 dB V at the voice terminals.
Art. 43 The voice terminal should meet the following noise characteristics:
I – the emission noise power, measured in the voice terminals, with the handset off the hook, and
without acoustic signal coming from the emitting capsule, should be smaller than or equal to -64
dBmp, when measured with a link current varying between 20 mA and the maximum possible link
current;
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II – the reception noise power, measured with an artificial ear coupled to a reception capsule, with
the handset off the hook, and without acoustic signal coming from the emitting capsule, should be
smaller than or equal to -49 dB Pa (A), when measured with a link current varying between 20 mA
and the maximum possible link current;
Art. 44 The voice terminal should meet the following noise characteristics:
I – for an acoustic stimulus of -4,7 dB Pa, at the mouth reference point, with a variation of ±10 dB,
the electric response should vary in the same proportion (±10 dB), with a tolerance of ±1 dB for the
average, and ±1.5 dB for the measurement in individual frequencies ranging from 300 Hz to 3400
Hz;
II – for an acoustic stimulus of -18 dB V, at the voice terminals, with a variation of ±10 dB, the
acoustic response should vary in the same proportion (±10 dB), with a tolerance of ±1 dB for the
average, and ±1.5 dB for the measurement in individual frequencies ranging from 300 Hz to 3400
Hz.
Art. 45 The audible intensity level produced by the voice terminal audible warning, when submitted
to a signal of 70 Vrms and 24 Hz, should be greater than or equal to 70 dB SPL (A), measured at
one meter way from the voice terminal.
Section III
Functional Requirements
Art. 46 The voice terminal should enable the continuous adjustment, or at least with 2 different
levels, of the audible intensity level generated by the audible warning.
Art. 47 The voice terminal should enable the option to choose the emitted line signaling, between
the decadic and multi-frequency signaling, specified in Articles 27 and 28 of this Regulation.
Art. 48 The voice terminal should have a keypad, with the physical key arrangement according to
Figure 4.
Figure 4 – Physical Key Arrangement
I – digit 5 key should have the proper characteristic to easily enable its identification by the sight
disabled;
II – when there are supplementary function keys, these may be freely set up in the keypad.
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Section IV
Voice Terminal Requirements for the Partial Hearing Disabled
Art. 49 In addition to the requirements specified in Articles 25 and 48 of this Regulation, the voice
terminals that enable the receiving capsule to be inductively coupled with hearing aid devices,
should also meet the provisions of item 5 of ETSI ETS 300 381 Standard, with regard to the
magnetic field intensity, magnetic field linearity with the audible pressure level, and magnetic field
frequency response.
Chapter III
Specific Data Terminal Requirements
Section I
Signaling Requirements
Art. 50 The data terminal should recognize the presence of the dial or mark tone emitted by the
exchange, with the following characteristics:
I – frequency according to Table 1;
II – level of -5 dBm to -25 dBm, measured in a continuous emission rate, under an impedance of
600 Ω.
Art. 51 The data terminal should recognize the presence of the busy tone emitted by the exchange,
with the following characteristics:
I – timing and frequency according to Table 1;
II – level of -5 dBm to -25 dBm, measured in a continuous emission operation, under an impedance
of 600 Ω.
Art. 52 The data communication equipment should recognize an incoming signal with the
characteristics defined in Art. 11, for lines with 0 to 3 km, containing up to 4 terminals connected to
the subscriber line.
Section II
Electric Requirements
Art. 53 The maximum Power Level of the signal transmitted by the data terminal should be -6 dBm,
measured over a load of 600 Ω, within the range of 300 Hz to 3400 Hz.
Art. 54 Where P is the Power Level of the signal transmitted by the data terminal within the range
of 300 Hz to 3400 Hz, the signal power outside this range should not exceed the following limits:
I – (P-20) dBm from 4 kHz to 8 kHz (individual spurious);
I – (P-40) dBm from 8 kHz to 12 kHz (individual spurious);
III – (P-60) dBm from 12 kHz to 150 kHz, measured in any band of 4 kHz.
Art. 55 For the data terminal having an auxiliary output for the voice terminal, the following
characteristics should be met:
14
I – the Insertion Loss caused by the circuit that connects the auxiliary output to the subscriber
should be smaller than or equal to 1 dB, within the range between 300 Hz and 3400 Hz, measured
with a load of 600Ω;
II – the Psophometric Noise, measured in the line terminals, should be smaller than or equal to -70
dBmp, when the terminal connected to the auxiliary output is with the link closed;
III – the Longitudinal Balance, measure in the lint e terminals should meet the levels specified in
Art. 32, when the terminal connected to the auxiliary output is with the link closed.
Section III
Performance Requirements
Art. 56 The data terminal performance should evaluated under the following conditions:
I – the Error Rate measured in the tests should smaller than 1x10-6;
II – the data terminal should be testes in the modulation that enables the operation of the highest
possible transmission rate;
III - the duration of the error rate tests should be time-limited for sending 10 million bits, or un 15
minutes, whichever is smaller.
Sole paragraph. The data terminal should operate with other existing analog equipment, keeping the
performance specified above.
Art. 57 For the data terminal operating with fax, the performance should be evaluated through the
transmission and reception of standard testing sheets specified in ITU-T Recommendation T.22.
Sole paragraph. The data terminal should interoperate with other existing analog equipment,
keeping the performance specified above.
Section IV
Functional Requirements
Art. 58 The data terminal should meet the AT commands, established by ITU-T Recommendation
V-250.
Art. 59 The voice terminal should enable the option to choose the line signaling, between the
decadic and multi-frequency signaling, specified in Articles 27 and 28 of this Regulation.
Art. 60 The data terminal should enable the auditory monitoring, with possibility of inhibiting the
signals present in the telephone line, upon the closing of the link.
Sole paragraph. The following are the signals present in the line: busy tone, decadic and multifrequency signaling.
Art. 61 The external use data terminal should enable, at least, the visual indication of the operation
status of the following signals:
15
I – CT-104 (RD) – “Received Data”;
II – CT-109 (DCD) – “Data Channel Received Line Signal Detector”;
III – CT-103 (TD) – “Transmitted Data”;
IV – CT-106 (CTS) – “Clear to Send”;
V – CT-107 (DSR) – “Data Set Ready”;
VI – CT-108 (DTR) – “Data Terminal Ready”;
VII – Test – Indication of the execution of a test loop;
VIII – Power Supply – Indication of the power supply status.
Art. 62 The data terminal should enable the execution of the following test loop:
I – LAL – Local Analog Loop;
II – LDL – Local Digital Loop;
III – LDR – Remote Digital Loop.
Art. 63 The data terminal operating with standardized communication protocol according to ITU-T
Recommendations, should satisfy the Recommendation requirements.
Chapter IV
Specific Requirements for the Caller Access Identifier Terminal
Art. 64The terminal having the function of identifying the caller access by means of multifrequency signals (DTMF) should operate with the following signaling characteristics:
I – the identification of the caller access will be carried out according to Table 3;
II – the terminal should correctly identify signals with power level within the range between -3 and
-25 dBm.
(measured over a impedance of 600 Ω);
III – the terminal should not identify signals with power level lower than -50 dBm (measured over a
impedance of 600 Ω);
IV – the terminal should operate according to a sequence of DTMF signals defined in Table 6;
V – the terminal should recognize the caller access category according to Table 7.
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Table 6 – Sequence of DTMF Signals
Signal Received
A
Subscriber category
Digits from 0 to 9
C
Ring Tone Current
Description
Starting Indicator Digit
Caller subscriber category Indicator
Digit (see Figure 4)
Digits corresponding to the caller
subscriber number
Ending Indicator Digit
Table 7 – Caller Subscriber Categories
Digit
Shown
1
2
3
4
5
6
7
8
9
Caller subscriber category
Common subscriber
Subscriber with special billing
Maintenance equipment
Local public telephone
Telephone operator
Data communication equipment
Long distance public telephone
Collect call
International origination call
Chapter V
Specific Requirements for Terminals Interconnected to the STFC
over Wireless Fixed Access Systems.
Art. 65 These are applicable to the requirements specified in Articles 26 to 63 of this Regulation.
Sole paragraph. When the Access Terminal Station (ETA) and the terminal are integrated into the
same equipment, in addition to meeting the provisions of this chapter, the Technical Requirements
and Test Procedures Applicable to the Certification of Category I Telecommunications Products,
for products classified as Access Terminal Station, are also applicable.
TITLE IV
REQUIREMENTS FOR THE CERTIFICATIONS OF TERMINALS WITH
WITH DIGITAL INTERFACE TO THE STFC
Chapter I
Signaling Requirements
Art. 66 The user terminal, when provided with voice interface, should accept the following
signaling sent over the telephone set connected to the voice interface:
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I – decadic frequency according to Table 4;
I – multi-frequency according to Table 2;
Chapter II
Functional Requirements
Art. 67 When the user data signal speed is lower than 64 kbit/s, a speed adaptation should be
performed, according to the specifications of ITU-T Recommendation V.110.
Art. 68 When the user voice terminal provides a voice interface, the voice signal should be coded
according to coding Law A of ITU-T Recommendation G.711.
Art. 69 The user terminal should enable the call/answer operation either manually or automatically,
according to ITU-T Recommendation V.25. It should be possible to inhibit the automatic answer
through the front panel.
Art. 70 The system should provide the execution of the following loop tests, as shown in Figure 5:
User
Modem
Exchange
Modem
User
Modem
Figure 5 – Test Loops
I – LAL – Local Analog Loop;
II – LDL – Local Digital Loop;
III – LDR – Remote Digital Loop.
Sole paragraph. LAL and LDR test loops should be performed through the exchange equipment
panel commands, and the LDL through the user terminal panel command.
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Art. 71 The user terminal should have a visual indication of the power supply, line signal, error rate,
and the following signals:
I –CT-103 status;
II –CT-104 status;
III –CT-106 status;
IV –CT-107 status;
V – CT-108 status;
VI – CT-109 status;
VII – Test indication;
VIII – indication of “data” mode;
IX – indication of “voice” mode;
X – indication of incoming call;
XI – indication of automatic answer.
Chapter III
Line Interface Electric Requirements
Art. 72 All characteristics specified in this item are measured, or have as reference the termination
of resistive impedance of 135 Ω within the range between 0 and 160 kHz.
Art. 73 When the signal consists of a bit frame with a frame alignment word, and symbols of equal
occurrence in further positions, the average line power should be smaller than +14 dBm, measured
in the frequency range between 0 and 80 kHz.
Art. 74 The user terminal should have a longitudinal rms voltage component, measured in any band
of 4 kHz for an average period of time of 1 second, smaller than -50 dB V within the frequency
range between 100 Hz and 170 kHz, and smaller than -80 dB V in the frequency range between 170
Hz and 200 kHz. This measurement should be performed over an impedance composed of a 100 Ω
resistor in series with a 150 nF capacitor.
Art. 75 The Longitudinal Balancing should be in accordance with Figure 6, and be:
I – greater than 55 dB for frequencies ranging between 281.2 Hz and 40 kHz;
II – below 281.2 Hz and above 40 kHz it should show a 20 dB/decade drop.
Art. 76 The Return Loss with regard to the impedance of 135 Ω, in the frequency range between 1
kHz and 200 kHz, should be within the limits specified in Figure 7, and be:
19
I – greater than 20 dB between 10 Hz and 25 kHz;
II – below 10 Hz and above 25 kHz it should show a 20 dB/decade drop.
Art. 77 The upper limit of the signal power spectral density should be within the limits of Figure 8.
Figure 6 – Longitudinal Balancing
Figure 7 – Return Loss
20
Figure 8 - Upper Limit of the Spectral Density for the Power Signal Transmitted in the Interface
Chapter IV
Performance Requirements
Art. 78 The modems should operate with an error rate (BER) smaller than or equal to 1x10-7. Sole
paragraph. The specified error rate should be obtained when the system operates in any of the line
configurations shown in Figures 9a, 9b, 9c and 9d.
Art. 79 The electric characteristics of the cables that compose the lines specified in Art. 78 are
defined in the standard Certification and Homologation of Metallic Telephone Cables,
issued by Anatel.
Art. 80 The performance specified should be obtained for each one of the lines shown in Art. 78,
with the user terminal being evaluated, subject to the paradiaphony noise and metallic noise.
Art. 81 The paradiaphony noise should sown the following characteristics:
I – the simulated paradiaphony should be introduced into the receiver of the modem being tested.
This is obtained based on a white noise source, conformed to a calibrated gaussian filter.
II – the interfering source is frequency-formatted, and its power level is adjusted in a way so as to
simulate the paradiaphony of 49 interfering pairs in a group of pairs;
III – The paradiaphony DEP - Pnext – may be obtained by the application of a simplified
paradiaphony model for the DEP of the 49 interfering sources, whose graphic representation is
shown in Figure 10;
IV – The equation below and Figure 10 represent the DEP unilaterally, with the power obtained in
watts, by means of the Pnext integral with relation to the frequency, in the interval ranging from 0
to infinite;
21
Where:
f = frequency in Hz
fo = 80 kHz
k = (5/9)xVp2/R
Vp = 2.33 V
R = 135 Ω
V – the paradiaphony simplified model shows a constant of 15 dB/decade and the attenuation value
of 57 dB at 80 kHz. Pnext has a significant level in the range between 160 kHz to 320 kHz, and
even in higher frequencies. However, a range limiter filter may be used to drastically limit the DEP
in the frequencies above 320 kHz;
VI – the paradiaphony simulated by the equation shows two terms A and B, where:
a) “A” represents the diaphony of 49 interfering signals;
b) “B” is a decreasing paradiaphony transfer function at a frequency of 15 dB/decade, and with an
attenuation of 57 dB at 80 kHz.
VII – for the line indicated in Figure 9a, the noise margin injected should be -6 dB. For the lines
indicated in Figures 9b and 9c, the noise margin should be 0 dB,
and for the line indicated in Figure 9d, the noise margin should be +6 dB.
Art. 82 The common mode noise, simulating the noise per induction of electric power lines
(frequency of 60 Hz and its harmonics), to be introduced in the modem receiver, should consist of
the combination of any two harmonics, listed in Table 8, at the power level indicated in the same
table.
Table 8 – Common Mode Noise Power
FREQUENCY
(Hz)
TONE POWER
(dBm in 135 Ω)
22
Exchange
Modem
User
Modem
Figure 9a – Line Type A
Exchange
Modem
User
Modem
Figure 9b – Line Type B
User
Modem
Exchange
Modem
Figure 9c – Line Type C
Exchange
Modem
User
Modem
Figure 9d – Line Type D
Figure 9 – Line Configurations
23
Unilateral Power Spectral Density
Figure 10 – Simulated Paradiaphony DEP for 2B1Q System Test
Chapter V
Electromagnetic Compatibility Requirements
Art. 83 The terminal should meet the provisions prescribed by the Technical Regulation for
Telecommunications Equipment with regard to the Electromagnetic Compatibility Aspects.
Sole paragraph. In the resistibility tests, the tests required by ITU-T Rec. K 41 should be performed
in lieu of the tests required in Art. 13 of the Regulation mentioned in this chapter.
Chapter VI
Electric Safety Requirements
Art. 84 The terminal should meet the provisions prescribed by the Technical Regulation for
Telecommunications Equipment with regard to the Electric Safety Aspects.
TITLE V
TEST PROCEDURES FOR TERMINAL CERTIFICATION
Chapter I
General Provisions
Art. 85 The test procedures to be used are shown below, nonetheless, the use of alternative
procedures is optional, provided they are equivalent to the those specified in this Regulation.
24
Chapter II
Test Conditions
Art. 86 All measurements should be performed in an environment with the temperature between 20°
and 28°C, and relative air humidity between 30 and 75%.
Chapter III
Tests for Terminals with Analog Interfaces to the STFC
Art. 87 The tests should be performed by using the power supply bridge shown in Figure 11.
The artificial line should be in accordance with Figure 12, with the cell simulating a telephone line
with a 0.40 mm diameter conductor, 280 Ω/km resistance, and 50 nF/km capacitance.
Figure 11 – Power Supply Bridge
12.5 nF
12.5 nF
Figure 12 – Artificial Line
25
Section I
Tests Common to All Terminals
Art. 88 To measure the resistance in a direct current, use the assembly of Figure 13, and perform the
following procedure:
Power Supply
Bridge
Terminal
Equipment
I – keep the equipment in the closed link condition;
II – use Vbat = 48 V;
III – measure the Vt voltage in the If link current conditions of 20 mA, and in the maximum
possible current (adjust through the Rf);
IV – calculate the resistance through the division of Vt by If (Vt/If);
V – repeat the Vt measurement by inverting the terminal input terminals;
VI – keep the equipment in the open link condition;
VII – use Vbat = 48 V and Rf = 0 Ω;
VIII – measure current If;
IX – repeat the If measurement by inverting the terminal input terminals;
X – check that the results obtained meet the specification.
Art. 89 To measure the impedance at the frequency of 25 Hz, with the link opened, use the
assembly of Figure 14 and fallow the procedure below:
I – keep the terminal equipment in the open link condition (disable the automatic answering mode
for data terminals);
II – use a sinusoidal generator with a frequency of 25 Hz;
26
Terminal
Equipment
III – use R ≤ 300 Ω;
IV – adjust Vg for Vt = 70 Vrms;
V – measure current It;
VI – calculate the terminal equipment impedance module by using the following equation:
|Z| = Vt/It
VII – check that the result obtained is in accordance with the specification.
Sole paragraph. In this test, the meters to be used should indicate the actual rms value because the
voltage and current wave form may be sinusoidal.
Art. 90To measure the impedance at the frequency between 300 Hz and 3400 Hz, with the link
opened, use the assembly of Figure 15 and fallow the procedure below:
Power Supply
Bridge
Terminal
Equipment
Fig 15 - Impedance at the Frequency of 300 Hz to 3400 Hz, with the Link Opened
I – keep the equipment in the open link condition;
II – use a sinusoidal generator with an output impedance smaller than or equal to 6 Ω;
III – ajust Vg for Vt = 0.388 Vrms;
27
IV – vary the generator frequency from 300 Hz to 3400 Hz;
V – measure voltage Vi by using a high input impedance selective meter (≥ 50 kΩ), tuned to the
same frequency as the generator’s, with the bandwidth smaller than or equal to 25 Hz;
VI – calculate the terminal equipment impedance module, for the frequencies of 300 Hz, 600 Hz,
1000 Hz, 1500 Hz, 2000 Hz, 2500 Hz, 3000 Hz and 3400 Hz, by using the following equation:
VII – check that the results obtained meet the specification.
Art. 91 To measure the Longitudinal Balancing, use the assembly of Figure 16 and follow the
procedure below:
Power Supply
Bridge
Terminal
Equipment
Figure 16 – Longitudinal Balancing
I – keep the equipment in the open link condition;
II – use Vbat = 48V and Rf = 0 Ω;
III – use 300 Ω matching resistors with a tolerance of 0.1% among each other;
IV – use a sinusoidal generator with an output voltage Vg = 0.775 Vrms, with an output impedance
smaller than or equal to 6 Ω;
V – connect the generator ground at the terminal equipment grounding point. If there is no
grounding point, place the equipment being tested over a metallic plate and connect it to the
generator ground;
VI – vary the generator frequency from 60 Hz to 3400 Hz;
28
VII – measure voltage Vt by using a high input impedance balanced selective meter (= 50 kΩ),
tuned to the same frequency as the generator’s, with the bandwidth smaller than or equal to 25 Hz;
VIII – calculate the Longitudinal Balancing (BAL) by using the equation below, for Vg and Vt
measured in rms Volts:
or, for Vg and Vt measured in dB:
IX – repeat paragraphs II to VII, keeping the equipment in the closed link condition and without
sending any signal. In the case of a voice terminal, make the measurements with the handset off the
hook, keep the handset in a location with low environment noise [≤ 40 dB SPL(A)] or replace the
transmitting capsule for its impedance equivalent to 1 kHz. Keep the receiving capsule coupled to
the artificial ear, according to IEC-318;
X – repeat this procedure by inverting the terminal equipment input terminals;
XI – check that the results obtained meet the specification.
Art. 92 To measure the Return Loss, use the assembly of Figure 17 and follow the procedure below:
Power Supply
Bridge
Terminal
Equipment
Figure 17 – Return Loss
I – use 600 Ω matching resistors with a tolerance of 0,1% among each other;
II – keep the equipment in the closed link condition and without sending signal; In the case of a
voice terminal, make the measurements with the handset off the hook, keep the handset in a location
with low environment noise [≤ 40 dB SPL(A)] or replace the transmitting capsule for its impedance
equivalent to 1 kHz. Keep the receiving capsule coupled to the artificial ear, according to IEC-318
standard;
29
III – use a sinusoidal generator with an output impedance Vg = 0.775 Ω, whose output impedance is
smaller than or equal to 6 Ω;
IV – vary the generator frequency to 300 Hz, 600 Hz, 1000 Hz, 1500 Hz, 2000 Hz, 2500 Hz, 3000
Hz and 3400 Hz;
V – measure voltages Vt1 and Vt2 by using a high input impedance balanced selective meter (≥ 50
kΩ), tuned to the same frequency as the generator’s,
with the bandwidth smaller than or equal to 25 Hz; VI – calculate the Return Loss by using the
following equation, for Vt1 and Vt2 measured in rms Volts:
Or for Vt1 and Vt2 measured in dB:
VII – execute this procedure for the frequencies defined in paragraph IV, with link current If
adjusted (through Rf) to 20 mA and the maximum possible link current;
VIII – repeat the measurements by inverting the terminal equipment input terminals;
IX – check that the results obtained meet the specification.
Art. 93 To measure the Psophometric Noise, use the assembly of Figure 18 and follow the
procedure below:
Spectrum Analyzer
Power Supply
Bridge
Terminal
Equipment
Figure 18 – Psophometric NoiseI
I – in lieu of the spectrum analyzer, use a high input impedance psophometric meter (≥ 50 kΩ),
capable of making the measurements according to ITU-T Recommendation O.41;
II – keep the equipment in the open link condition;
30
III – measure the psophometric noise and check that the result obtained is in accordance with the
specification.
IV – configure the terminal equipment to keep the link closed, without sending any signal. In the
case of a voice terminal, make the measurements with the handset off the hook, keep the handset in
a location with low environment noise [≤ 40 dB SPL(A)] or replace the transmitting capsule for its
impedance equivalent to 1 kHz. Keep the receiving capsule coupled to the artificial ear, according
to IEC-318 standard;
V – measure the psophometric noise with a current of 20 mA, and at the maximum possible link
current (adjust through the Rf);
VI – check that the results obtained meet the specification.
Art. 94 To measure the Decadic Signaling Characteristics use the assembly of Figure 19 and
follow the procedure below:
Power Supply
Bridge
Terminal
Equipment
Digital oscilloscope
(2 channels)
Figure 19 – Decadic Signaling Characteristics
I – adjust Rf for link current If to be 20 mA;
II – make the terminal equipment to send all possible digits (0 to 9) and check in the oscilloscope
whether the pulses are correctly sent;
III – measure the opening/closing times;
IV – calculate the opening/closing ratio;
V – calculate the keying pulse frequency;
VI – measure the interdigital pause time;
VII – measure voltage Va and calculate the current during the opening of the link, by using the
following equation:
FÓRMULA
31
VIII – check that the results obtained meet the specification.
Art. 95 To measure the Multi-Frequency Signaling Characteristics use the assembly of Figure 18
and follow the procedure below:
I – use a spectrum analyzer with an input impedance greater than or equal to 50 Ω;
II – adjust Rf for link current If to be 20 mA;
III – make the equipment to send two digits capable of covering the four possible signaling
frequencies to be sent and measured for each digit the frequencies and the respective power levels
and tones sent;
IV – measure the presence of pause and tones by using a digital oscilloscope in lieu of the spectrum
analyzer;
V – adjust Rf for link current If to be the maximum possible link current and repeat the previous
measurements;
VI – check that the results obtained meet the specification.
Art. 96 To measure the Spurious Signals during the sending of multi-frequency signaling, use the
assembly of Figure 18 and follow the procedure below:
I – use a spectrum analyzer with an input impedance greater than or equal to 50 Ω;
II – adjust Rf for link current If to be 20 mA;
III – make the terminal equipment to continuously send any digit (0 to 9). If the terminal equipment
does not send a signal continuously, the spectrum analyzer should be able to measure the spectrum
in the signal emission interval only;
IV – measure the power level of the individual spurious frequencies the range of 300 Hz to 3400 Hz
by using a band width of 100 Hz, and calculate the total spurious frequency power, or use a meter
capable of measuring the power in the entire range between 300 Hz to 3400 Hz, and filter the two
essential frequencies;
V – check that the results obtained meet the specification.
Section II
Specific Tests for Voice Terminal
Art. 97 To check the Audible Warning Activation, use the assembly of Figure 20 and follow the
procedure below:
32
Figure 20 – Audible Warning Activation Check
I – use a sinusoidal voltage (Vg) generator, with the signal presence time of 1 second and absence
of 4 seconds;
II – keep the artificial line at 0 km;
III – ajust Vg for Vt = 90 Vrms;
IV – check that the audible warning is activated with the generator frequency varying within the
range of 15 Hz to 30 Hz;
V – adjust Vg for Vt = 70 Vrms;
VI – keep the artificial line at 3 km;
VII – check that the audible warning is activated with the generator frequency varying within the
range of 15 Hz to 30 Hz;
Art. 98 To measure the dial or mark tone resuming pulse, use the assembly of Figure 19, and follow
the procedure below:
I – keep the handset off the hook;
II – press the dial or mark tone resuming key, and by using an oscilloscope measure the link
opening time;
III – measure voltage Va and calculate the current during the opening of the link, by using the
following equation:
FÓRMULA
IV – check that the results obtained meet the specification.
Art. 99 In case of voice terminal equipment for the partial hearing disabled, perform the magnetic
field intensity and magnetic field linearity tests, with the sound pressure level, and magnetic field
frequency response, according to the methods described in item 7 of ETS 300 381 standard.
33
Section III
Specific Tests for Data Terminal
Art. 100 To measure the Transmission Power Levels, use the assembly of Figure 21 and follow the
procedure below:
Power
Supply
Bridge
Terminal
Equipment
Figure 21 – Power Transmission Levels
I – configure the data communication equipment (ECD) to transmit in maximum power, and in the
modulation by which the equipment operates in the maximum transmission speed.
II – Configure the data terminal equipment (ETD) to generate the test standard 511;
III – use a meter (M) with high input impedance (≥ 50 kΩ) capable of measuring the entire range of
300 Hz to 3400 Hz;
IV – adjust Rf for the link current If each ECD is 20 mA;
V – measure the transmission power;
VI – if the ECDs use full duplex transmission, in the same frequency range, (using an echo
suppressor), 3 dB should be subtracted from the measured value;
IV – adjust Rf for the link current in each ECD to be the maximum possible current, and repeat
paragraphs IV and V;
VIII – optionally, this measurement may be performed by using hybrid couplers which separate the
transmission and reception signals;
IX – check that the results obtained meet the specification.
Art. 101 To measure the transmission spurious levels, use the assembly of Figure 21 and follow the
procedure below:
I – Configure the data communication equipment (ETD) to transmit at maximum power and at the
modulation by which the equipment operates at the maximum transmission speed;
II – Configure the data terminal equipment (ETD) to generate the test standard 511;
III – adjust Rf for the link current of each ECD to be 20 mA;
34
IV – by using a selective meter (M) with high input impedance (= 50 kΩ) capable of measuring the
entire range of 300 Hz to 3400 Hz, measure the transmission power;
V – by using a selective meter (M) with high input impedance and pass band range smaller than or
equal to 25 Hz, measure the highest power level for frequencies in the rage of 4 kHz to 8 kHz;
V – by using a selective meter (M) with high input impedance and pass band range smaller than or
equal to 25 Hz, measure the highest power level for frequencies in the rage of 4 kHz to 12 kHz;
V – by using a selective meter (M) with high input impedance and pass band range of 4 kHz,
measure the highest power level for frequencies in the rage of 12 kHz to 150 kHz;
VI – if the ECDs use full duplex transmission, in the same frequency range, (using an echo
suppressor), 3 dB should be subtracted from the measured value;
IV – adjust Rf for the link current in each ECD to be the maximum possible current, and repeat
paragraphs III and VII;
X – optionally, this measurement may be performed by using hybrid couplers which separate the
transmission and reception signals;
XI – check that the results obtained meet the specification.
Art. 102 To check the recognition of dial or mark tone, use the assembly of Figure 20 and follow
the procedure below:
Power Supply
Bridge
Sinusoidal
generator
Data
Communication
Equipment
Generic
Meter
I – configure the equipment to recognize the dial or mark tone;
II – keep the switches set to position 1, and adjust the generator so that Vt = -5 dBm;
III – configure the equipment to recognize the dial or mark tone;
35
IV – carry out this procedure for the frequencies ranging between 400 Hz and 450 Hz, for the link
current of 20 mA, and for the maximum possible link current (adjust through the Rf);
V – repeat paragraphs II to IV, adjusting the generator to a level of -25 dBm.
Art. 103 To check the recognition of the busy tone, use the assembly of Figure 22, and follow the
procedure below:
I – configure the equipment to recognize the dial or mark tones, and the busy tone;
II – keep the switches set to position 1, and adjust the generator so that Vt = -5 dBm (the generator
should emit the signal continuously);
III – changeover the switches to position 2 and check whether the terminal equipment performs the
marking. When the marking starts, changeover the witches back to position 1;
IV – when the marking is completed, changeover the switches to position 2, with the generator
emitting the signal at the frequency and cadence of the busy tone, and check whether the equipment
recognizes the busy tone;
V – carry out this procedure for the frequencies ranging between 400 Hz and 450 Hz, presence and
absence times with regard to the 225 ms and 275 ms signals, respectively, for the link current of 20
mA, and for the maximum possible link current (adjust through the Rf);
VI – repeat paragraphs II to V, adjusting the generator to a level of -25 dBm.
Art. 104 To check the recognition of the call ring tone, use the assembly of Figure 20 and follow the
procedure below:
I – configure the equipment for an automatic answer, after the first call ring tone received;
II – keep the artificial line at 0 km;
III – ajust Vg for Vt = 90 Vrms;
IV – check that the call ring tone is recognized with the generator frequency varying within the
range of 15 Hz to 30 Hz;
V – adjust Vg for Vt = 70 Vrms;
VI – keep the artificial line at 3 km;
VII – check that the call ring tone is recognized with the generator frequency varying within the
range of 15 Hz to 30 Hz;
Section IV
Specific Tests for Data Terminal with
Voice Terminal Auxiliary Output
Art. 105 To measure the Insertion Loss, use the assembly of Figure 23 and follow the procedure
below:
36
Power Supply
Bridge
Data
Communication
Equipment
Sinusoidal
generator
Generic
Meter
Figure 23 – Insertion Loss
I – keep the terminal in the open link condition, so that output to the voice terminal (a2/b2) is
connected to the line;
II – use a sinusoidal generator with an output voltage Vg = 1.55 Vrms, with an output impedance
smaller than or equal to 6 Ω;
III – use as a meter a high input impedance (≥ 50 kΩ) balanced selective voltmeter tuned to the
same frequency as the generator’s, with a bandwidth smaller than or equal to 25 Hz;
II – keep the switches set to position 1, and measure voltage Vt (identified by Vt1);
V – changeover the switches to position 2, and measure voltage Vt (identified by Vt2);
VI – calculate the Insertion Loss by using the following equation, for Vt measured in rms Volts:
or, for Vt measured in dB:
VII – carry out this procedure for the entire voice frequency range, between 300 Hz and 3400 Hz, at
a link current of 20 mA, and at the maximum possible link current (adjust through the Rf);
VIII – check that the results obtained meet the specification.
Art. 106 To measure the Psophometric Noise, use the assembly of Figure 24 and follow the
procedure below:
37
Psophometric
Meter
Data
Communication
Equipment
Power Supply
Bridge
Figure 24 – Psophometric Noise
I – keep the data communication equipment in the open link condition, so that output to the voice
terminal (a2/b2) is connected to the line;
II – use a high input impedance (= 50 kΩ) psophometric meter;
III – measure the psophometric noise at a link current of 20 mA, and at the maximum possible link
current (adjust through the Rf);
IV – check that the results obtained meet the specification.
Art. 107 To measure the Longitudinal Balancing, use the assembly of Figure 25 and follow the
procedure below:
Power Supply
Bridge
Data
Communication
Equipment
Figure 25 – Longitudinal Balancing
I – keep the data communication equipment in the open link condition;
II – use 300 Ω matching resistors with a tolerance of 0,1% among each other;
38
III – use a sinusoidal generator with an output voltage Vg = 0.775 Vrms, with an output impedance
smaller than or equal to 6 Ω;
IV – use as a meter a high input impedance (= 50 kΩ) balanced selective voltmeter tuned to the
same frequency as the generator’s, with a bandwidth smaller than or equal to 25 Hz;
V – connect the generator ground at the terminal equipment grounding point. If there is no
grounding point, place the equipment being tested over a metallic plate and connect it to the
generator ground;
VI – use a link current of 20 mA (adjust through the Rf);
VII – vary the generator frequency from 60 Hz to 3400 Hz;
VIII – measure voltage Vt under switch S1 opened and closed conditions;
IX – calculate the Longitudinal Balancing (BAL) by using the equation below, for Vt measured in
rms Volts:
or, for Vg and Vt measured in dB:
X – repeat paragraphs VII to IX, with the maximum possible link current;
XI – repeat this procedure by inverting the terminal equipment input terminals;
XII – check that the results obtained meet the specification.
Section V
Specific Tests for the Caller Access
Identifier Terminal with DTMF Signaling
Art. 108 To check the recognition of the caller category and access number, use the assembly of
Figure 26 and follow the procedure below:
I – adjust the artificial line to a line with 0 km in length;
II – use a DTMF signal generator that generates the high group frequencies with a level 2 dB above
the low group frequency level. The generator should be programmed to generate the sequence
shown in Table 6, with nominal signal frequency, pause, and duration characteristics according to
Table 3;
39
Power Supply
Bridge
DTMF
Signal
Generator
Artificial
Line
(Ø=0.4 mm)
Caller
Subscriber
Identifier
Selective
Meter
Figure 26 – Recognition of the Caller Category and Access Number
III – to measure the power with the Vt meter, use a high input impedance meter capable of
measuring the power in dBm with relation to 600 Ω;
IV – adjust the DTMF signal generator output level so that the high group frequency power
measured with Vt is -8 dBm (measure with the generator emitting the signal continuously);
V – send the sequence shown in Table 6, where, for each sequence sent, a type of caller subscriber
category is also sent;
VI – check that all types of categories and numbers sent are correctly recognized;
VII – repeat paragraphs II to VI, by using a line with 3 km in length.
Art. 109 To check the acceptance of the presence and pause times, use the assembly of Figure 27
and follow the procedure below:
Power Supply
Bridge
DTMF
Signal
Generator
Caller
Subscriber
Identifier
Selective
Meter
Figure 27 – Acceptance of the Signal Presence and Pause Times
40
I – program the DTMF signal generator to generate the sequence shown in Table 6 with the
following timing:
a) signal presence time: 56 ms;
b) signal pause time: 56 ms.
II – use a DTMF signal generator that generates the high group frequencies with a level 2 dB above
the low group frequency level. The generator should be programmed to generate the sequence
shown in Table 6, with nominal signal frequency, pause, and duration characteristics according to
Table 3;
III – to measure the power with the Vt meter, use a high input impedance meter capable of
measuring the power in dBm with relation to 600 Ω;
IV – adjust the DTMF signal generator output level so that the high group frequency power
measured with Vt is -8 dBm (measure with the generator emitting the signal continuously);
V – send the sequence shown in Table 6, with a number containing all possible digits;
VI – check that the sequence sent is receive correctly;
VII – repeat paragraphs II to VI, programming the DTMF generator to generate a sequence
with the following timing:
a) signal presence time: 84 ms;
b) signal pause time: 84 ms.
VIII – repeat paragraphs II to VI, programming the DTMF generator to generate a sequence with
the following timing:
a) signal presence time: 10 ms;
b) signal pause time: 10 ms.
IX – check that in this case the sequence sent is not identified.
Art. 110 To check the acceptance of DTMF signal frequency variation, use the assembly of Figure
27 and follow the procedure below:
I – program the DTMF signal generator to generate the sequence shown in Table 6 with the
frequencies deviated +1.5% with relation to the nominal frequencies;
II – use a DTMF signal generator that generates the high group frequencies with a level 2 dB above
the low group frequency level. The generator should be programmed to generate the sequence
shown in Table 6, with nominal signal frequency, pause, and duration characteristics according to
Table 3;
III – to measure the power with the Vt meter, use a high input impedance meter capable of
measuring the power in dBm with relation to 600 Ω;
41
IV – adjust the DTMF signal generator output level so that the high group frequency power
measured with Vt is -8 dBm (measure with the generator emitting the signal continuously);
V – send the sequence shown in Table 6, with a number containing all possible digits;
VI – check that the sequence sent is receive correctly;
VII – repeat paragraphs II to VI, programming the DTMF generator to generate a sequence shown
in Table 6, with the frequencies deviated -1.5% with relation to the nominal frequencies;
VIII – repeat paragraphs II to V, programming the DTMF generator to generate a sequence shown
in Table 6 with the frequencies deviated +3.5% with relation to the nominal frequencies;
IX – check that in this case the sequence sent is not identified.
X – repeat paragraphs II to V, programming the DTMF generator to generate a sequence shown in
Table 6 with the frequencies deviated -3.5% with relation to the nominal frequencies;
IX – check that in this case the sequence sent is not identified.
Art. 111 To check the acceptance of the DTMF signal level, use the assembly of Figure 27, and
follow the procedure below:
I – adjust the DTMF signal generator output level so that the high group frequency power measured
with Vt is -25 dBm (measure with the generator emitting the signal continuously);
II – the DTMF signal generator should generate the high group frequencies with a level 2 dB above
the low group frequency level. The generator should be programmed to generate the sequence
shown in Table 6, with nominal signal frequency, pause, and duration characteristics according to
Table 3;
III – to measure the power with the Vt meter, use a high input impedance meter capable of
measuring the power in dBm with relation to 600 Ω;
V – send the sequence shown in Table 6, with a number containing all possible digits;
V – check that the sequence sent is receive correctly;
VI – repeat paragraphs II to IV, adjusting the DTMF signal generator output level so that the power
measured by using Vt with relation to the high group frequencies is -50 dBm (measure with the
generator emitting the signal continuously);
VII - check that in this case the sequence sent is not identified.
42
Section VI
Data Terminal Performance Tests
Art. 112 To execute the performance tests in the data terminal equipment, use the assembly of
Figure 28 and follow the procedure below:
Artificial
Line
A-D / D-A
Power Supply
Bridge and
Conversion
Circuit
Artificial
Line
Figure 28 – Performance of the Data Terminal Equipment
I – configure the data communication equipment (ETD) to transmit at maximum power (≤ -6 dBm)
and at maximum transmission speed allowable for the equipment operation;
II – Configure the ETDs to send the test standard 511;
III – configure the artificial lines for simulating a 0.4 mm diameter conductor (resistance of 280
Ω/km, capacitance of 50 nF/km) and 3 km in length for each artificial line;
IV – configure the power supply circuit by using L = 5 H and C = 100 µF (or equivalent active
circuit), with a A-D / D-A conversion (according to ITU-T Rec. G.711), and a 2 wire / 4 wire / 2
wire conversion, according to ITU-T Rec. G.712, with a total attenuation of 6.0 dB to 1 kHz, and
nominal impedance of 600 Ω;
V – measure the error rate for the conditions required in Art. 56;
VI – To evaluate the error rate, at least 10 million bits should be sent with the time limited in 15
minutes;
VII – for data terminals that do not allow to send/receive data through an ETD, perform functional
tests simulating the normal modem operation, with artificial transmission line and power supply
bridge circuit, according to the provisions of items III and IV above;
VIII – for terminal equipment operating as fax, the test should be performed according to Art. 57,
using the artificial transmission line and power supply bridge circuit, according to the provisions of
items III and IV above.
Section VII
Electroacoustic Tests
Art. 113 The electroacoustic measurements referring to Art. 115, Art. 118, Art. 120, and Art. 124
(relative to the reception) should be performed in an environment with a noise level lower than NC30, and to those referring to further articles, in an environment with a noise level lower than NC-50,
under an environment temperature ranging between 20 and 28°C , and air relative humidity between
30 and 75%.
43
Art. 114 To measure the Emission Sound Index, use the assembly of Figure 29 and follow the
procedure below:
Handset in the
LRPG position
Sinusoidal
generator
Equalizer
Amplifier
Power Supply Bridge
Artificial
Mouth
Voice
Terminal
Equipment
Sound
Index
Meter
Artificial
Line
Figure 29 – Emission Sound Index
I – use an objective sound index measurement system;
II – calibrate the artificial mouth for an acoustic pressure of 0.58 Pa (-4.7 dB Pa) at the mouth
reference point along the frequency range of 100 Hz to 8 kHz;
III – mount the handset in the front of the artificial mouth in the LRGP position;
IV – use Rf = 0;
V – use a line with 0 km and 3 km in length, and check that the values obtained meet the
specification.
Art. 115 To measure the Reception Sound Index, use the assembly of Figure 30 and follow the
procedure below:
Handset in the
LRPG position
Power Supply Bridge
Sinusoidal
generator
Artificial
Ear
Artificial
Line
Voice
Terminal
Equipment
Sound
Index
Meter
Figure 30 – Reception Sound Index
44
I – use an objective sound index measurement system;
II – calibrate the artificial ear;
II – use a generator with an output impedance smaller than or equal to 6 Ω;
IV – adjust the generator output to 0.25 Vrms (-12 dB V) along the frequency range of 100 Hz to 8
kHz;
V – keep the handset in the LRGP position;
VI – couple the handset to the artificial ear;
VII – use Rf = 0;
VIII – use a line with 0 km and 3 km in length and check that the values obtained meet the
specification.
Art. 116 To measure the Local Effect Sound Index, use the assembly of Figure 31 and follow the
procedure below:
Sound
Index
Meter
Artificial
Ear
Sinusoidal
generator
Handset in the
LRPG position
Power Supply Bridge
Artificial
Mouth
Equalizer
Amplifier
Voice
Terminal
Equipment
Artificial
Line
Figure 31 – Local Effect Sound Index
I – use an objective sound index measurement system;
II – calibrate the artificial mouth for an acoustic pressure of 0,58 Pa (-4,7 dB Pa) at the mouth
reference point along the frequency range of 100 Hz to 8 kHz;
III – calibrate the artificial ear;
IV – mount the handset in the front of the artificial mouth in the LRGP position;
V – couple the handset to the artificial ear;
VI – use a line with 0 km and 3 km in length and check that the values obtained meet the
specification.
45
Art. 117 To measure the Emission Frequency Response, use the assembly of Figure 29, and perform
the following procedure:
I – replace the sound index meter for a voltmeter (without any filter);
II – keep a line with 0 km in length;
III – use Rf = 0;
IV – measure the emission frequency response in the range of 100 Hz to 8 Hz, applying an acoustic
pressure of 0.58 Pa (-4.7 dB Pa) at the mouth reference point;
V – check that the results obtained meet the specification.
Art. 118 To measure the Reception Frequency Response, use the assembly of Figure 30, and
perform the following procedure:
I – replace the sound index meter for a voltmeter (without any filter);
II – keep a line with 0 km in length;
III – use Rf = 0;
IV – measure the emission frequency response in the range of 100 Hz to 8 Hz, with the generator
output adjusted to 0.25 Vrms (-12 dB V);
V – check that the results obtained meet the specification.
Art. 119 To measure the Emission Harmonic Distortion, use the assembly of Figure 29, and perform
the following procedure:
I – replace the sound index meter for a distortion meter or spectrum analyzer;
II – calibrate the artificial mouth for an acoustic pressure of 0,58 Pa (-4,7 dB Pa) at the mouth
reference point (PRB);
III – keep a line with 0 km in length;
IV – adjust the RF for the link current to be 20 mA;
V – measure the emission harmonic distortion in the range of 300 Hz to 3400 Hz;
VI – check that the results obtained meet the specification.
Art. 120 o measure the Reception Harmonic Distortion, use the assembly of Figure 30, and perform
the following procedure:
I – replace the sound index meter for a distortion meter or spectrum analyzer;
II – keep a line with 3 km in length;
46
III – use Rf = 0;
IV – measure the reception harmonic distortion in the range of 300 Hz to 3400 Hz;
V – check that the results obtained meet the specification.
Art. 121 To measure the Reception Noise, use the assembly of Figure 32 and follow the procedure
below:
Power Supply Bridge
Artificial
Ear
Acoustic
Level Meter
with
Weighing A
Handset in the
LRPG position
Voice
Terminal
Equipment
Figure 32 – Reception Noise
I – calibrate the artificial ear;
II – couple the voice terminal equipment handset to the artificial ear and put it in the LRGP
position;
III – use a meter calibrated in dB Pa with weighing A;
IV – measure the reception noise by adjusting the Rf value so that link current If varies between 20
mA and the maximum possible link current;
V – check that the results obtained meet the specification.
Art. 122 To measure the Emission Noise, use the assembly of Figure 33 and follow the procedure
below:
I – use a psophometric meter with an input impedance greater than or equal to 50 Ω, capable of
performing measurements according to ITU-T Recommendation O.41;
II – mount the handset in the front of the artificial mouth in the LRGP position, disconnecting any
and all input signal in the artificial mouth;
III – measure the psophometric noise by adjusting the Rf value so that link current If varies between
20 mA and the maximum possible link current;
IV – check that the results obtained meet the specification.
47
Power Supply Bridge
Generic
meter
Terminal
Equipment
Figure 33 – Emission Noise Test
Art. 123 To measure the Emission Linearity, use the assembly of Figure 29 and follow the
procedure below:
I – use Rf = 0;
II – apply an acoustic stimulus of (-4,7 dB Pa) to the mouth reference point (PRB);
III – by using a line with 0 km in length, check the electric response in the voice terminal
equipment;
IV – vary in ±10 dB the acoustic pressure at the mouth reference point (PRB);
V – measure the variation of the electric response in the voice terminal equipment terminals;
VI – check that the results obtained meet the specification.
Art. 124 To measure the Reception Linearity, use the assembly of Figure 30 and follow the
procedure below:
I – use Rf = 0;
II – apply an electric stimulus of -18 dB V to the voice terminal equipment terminals;
III – by using a line with 0 km in length, check the acoustic response at the artificial ear output;
IV – vary in ±10 dB the electric stimulus;
V – measure the variation of the acoustic response in the artificial ear;
VI – check that the results obtained meet the specification.
48
Art. 125 To measure the Sound Intensity Level produced by the audible warning, use the assembly
of Figure 34, and follow the procedure below:
Microphone
Acoustic Level
Meter with
Weighing A
Voice
Terminal
Equipment
Figure 34 – Sound Intensity Level Produced by the Audible Warning
I – position the voice terminal equipment 1.5 m from the ground;
II – position the microphone at a distance of 1 m from the voice terminal equipment, measured
between the center of the telephone front face and the center of the microphone front surface, at an
angle between 10 to 45° formed with the horizontal plane;
III – the voice terminal equipment should be powered according to Figure 14, with Vg = 70 Vrms
(at the frequency of 25 Hz) and R ≤ 300 Ω:
IV – the measurement should be performed with an acoustic level meter, with readings in dB (A)
referred to 20 µPa [dB SPL(A)];
V – check that the results obtained meet the specification.
Art. 126 To measure the Voice Signal Attenuation during the sending of multi-frequency signaling,
use the assembly of Figure 29 and follow the procedure below:
I – replace the sound index meter for a spectrum analyzer or selective voltmeter;
II – calibrate the artificial mouth for an acoustic pressure of 0,58 Pa (-4,7 dB Pa) at the mouth
reference point (PRB);
III – keep a line with 0 km in length;
IV – use Rf = 0;
V – inject an acoustic signal of 1.1 kHz in the transmitting capsule;
VI – measure the level of the electric signal sent to the line;
VII – without removing the acoustic signal, make the voice terminal equipment to emit some multifrequency signaling and measure again the signal level in the line;
VIII – calculate the attenuation and check that the result obtained is in accordance with the
specification.
49
Art. 127 measure the characteristics of hearing aid devices for the voice terminal equipment to the
partial hearing disabled, the procedures indicated in item 7 of the ETSI ETS 300 381 standard are
applicable.
Section VIII
Electromagnetic Compatibility Tests
Art. 128 The data terminal should be tested according to the provisions of the specific regulation for
the electromagnetic compatibility aspects, in the following conditions:
I – use the test setup shown in Figure 35;
Artificial
Line
Power
Supply
Bridge
Power
Supply
Bridge
Artificial
Line
Figure 35 –Electromagnetic Compatibility Aspects
II – use artificial lines simulating 0.40 mm cables with 3 km in length each;
III – configure the data communication equipment to transmit at maximum power (≤ -6 dBm) and at
the modulation by which the equipment operates at the maximum transmission speed;
IV – configure the ETDs to send the test standard 511;
V – during the interference immunity test, introduce the disturbance into equipment B, and check
whether the error rate, at the reception, is kept smaller than or equal to 1x10-6. For terminal
equipment operating as fax, the test should be performed by equipment A sending the testing
standard sheets as specified in ITU-T Recommendation T.22 to equipment B, and by checking the
quality of the sheets received;
VI – To evaluate the error rate, at least 10 million bits should be sent with the measuring time
limited in 15 minutes;
VII – upon the completion of the electromagnetic disturbance resistibility test, the data terminal
equipment operation should be evaluated through following procedure:
a) perform line signaling functional tests (decadic and multi-frequency), and call receipt;
50
b) perform direct current resistance measurements, according to the provisions of Art. 30,
Longitudinal Balancing, as provided in Art. 32, and psophometric noise, according to the provisions
of Art. 34.
Art. 129 The data terminal should be tested according to the provisions of the specific regulation for
the electromagnetic compatibility aspects, in the following conditions:
I – use the test setup shown in Figure 36;
Power Supply Bridge
Selective
Voltmeter
Voice
Terminal
Equipment
Figure 36 – Electromagnetic Compatibility Aspects
II – in the conducted interference immunity test, the interfering signal should be introduced between
the power supply bridge and the equipment being tested;
III – in the interference (radiated or conducted) immunity test, the power of the 1 kHz demodulated
signal, measured at V1 (with a bandwidth smaller than or equal to 100 Hz), should be smaller than
or equal to -40 dBm;
IV – upon the completion of the electromagnetic disturbance resistibility test, the voice terminal
equipment operation should be evaluated through following procedure:
a) perform line signaling functional tests (decadic and multi-frequency), call conversion and receipt;
b) perform direct current resistance measurements, according to the provisions of Art. 30,
Longitudinal Balancing, as provided in Art. 32, and emission noise, according to the provisions of
Art. 34.
Section IX
Electric Safety Requirements
Art. 130 The terminal should be tested according to Regulation for the Certification of
Telecommunications Equipment with regard to the Electric Safety aspects.
Sole paragraph. The Acoustic Shock Protection test is applied only to voice terminal equipment, test
setup in Figure 36 should be used, introducing the electromagnetic disturbance between the power
supply bridge and the equipment being tested.
51
Chapter IV
Tests for Terminals with Analog Interfaces to the STFC
Section I
Electric Tests
Art. 131 To measure the Mean Transmission Level, use the assembly of Figure 37 and follow the
procedure below:
Selective
Level
Meter
User
Modem
Figure 37 – Transmitted Signal Mean Power Test
I – configure the equipment to transmit a pseudorandom signal with frame and multiframe
formatting in the line interface;
II – use a selective level meter configured for broadband (0 to 80 kHz) measurement, with a high
impedance (≥ 13,5 kΩ) input. If the measurement, in dBm, provided by the selective level meter is
referred to a load Z, different from 135 Ω, the following correction factor should be added to the
measured value:
Correction Factor = 10 x log (Z/135)
III – if the equipment does not allow the signal transmission without being connected to another
equipment, the assembly of Figure 38 should be used. In this case, 3 dB should be subtracted from
the measured value, due to both equipment being transmitting simultaneously.
User
Modem
Selective
Level
Meter
Exchange
Modem
Figure 38 – Alternative Method for the Transmitted Signal Mean Power Test
Art. 132 To measure the Output Longitudinal Voltage, use the assembly of Figure 39 and follow the
procedure below:
I – configure the equipment to transmit a pseudorandom signal with frame and multiframe
formatting in the line interface. The reference ground for the test should be the equipment ground
wire, if connected. Otherwise, the equipment digital plate ground should be used;
52
User
Modem
Spectrum Analyzer
*Resistors macthing each other with mismatch ≤ 0.1%
Figure 39 – Output Longitudinal Voltage Test
I – use a high impedance input (≥ 13,5 kΩ) spectrum analyzer with, and in the following conditions;
a) RBW (resolution bandwidth): 1 kHz;
b) VBW (video bandwidth): ≤ 10 Hz;
c) IRG (input range): 0 dBm;
d) linear scanning of 100 Hz at 200 kHz, minimum.
III – measure with the spectrum meter the signal power level over a testing longitudinal load (100 Ω
resistor in series with a 150 nF capacitor), in any bandwidth of 4 kHz, within the frequency range
specified in the previous item. To obtain the measurement in any 4 kHz range width it is necessary
to add 4 consecutive values provided by the analyzer, measured in bandwidths of 1 kHz;
IV –If the analyzer measurements referred to a load Z, different from 135 Ω, the following
correction factor should be added to the measured values:
Correction Factor = 10 x log (Z/135)
V – to obtain the value in dB V, the following equation should be applied:
V = M – 8.7 [dB V]
Where:
V is the signal level value in dB V;
M is the value of the sum of 4 consecutive values provided by the analyzer, in dBm;
8.7 is the correction term for the impedance of 135 Ω;
VI – if the equipment does not allow the signal transmission without being connected to another
equipment, the assembly of Figure 40 should be used. In this case, 3 dB should be subtracted from
the measured value, due to both equipment being transmitting simultaneously.
53
User
Modem
Exchange
Modem
Spectrum
Analyzer
Figure 40 – Alternative Method for the Output Longitudinal Voltage Test
Art. 133 To measure the Longitudinal Balancing, use the assembly of Figure 41 and follow the
procedure below:
User
Modem
Figure 41 – Longitudinal Balancing Test
I – keep the equipment being tested in the inactive mode. The reference ground for the test should
be the equipment ground wire, if connected. Otherwise, the equipment digital plate ground should
be used;
II – use a balanced selective level meter with high input impedance (= 13,5 kΩ), and a sinusoidal
signal generator with low impedance output (≤ 13,5 Ω);
III – inject a longitudinal sinusoidal signal whose voltage EL is 1 Vrms, and measure the resulting
ET transverse voltage in the frequency range between Hz e 1000 kHz. Calculate the Longitudinal
Balancing by using the equation below, for EL and ET measured in rms Volts:
54
or for EL and ET measured in dB:
Art. 134 To measure the Return Loss, use the assembly of Figure 42 and follow the procedure
below:
Figure 42 – Return Loss Test
I – keep the equipment in the inactive mode (without sending any signal);
IV – use a sinusoidal generator with an output voltage Vg = 1 Vrms, with a low output impedance
(≤ 13,5 Ω);
III – measure voltages Vt1 and Vt2 by using a high input impedance balanced selective meter (13.5
kΩ), tuned to the same frequency as the generator’s, with the bandwidth smaller than or equal to 25
Hz;
IV – calculate the Return Loss by using the following equation, for Vt1 and Vt2 measured in rms
Volts:
Art. 135 o measure the acceptance of Decadic Signaling in the voice interfaces, use the assembly of
Figure 43 and follow the procedure below:
I – configure the decadic signaling generator to generate a interdigital pause of 700 ms;
I – configure the decadic signaling generator to generate signaling pulses with opening time of 58
ms and closing time of 28 ms;
III – generate a signaling that permits to make a call and check whether the call was forwarded
correctly, by the receipt of the ring tone current in the telephone;
55
Voice
Interface
Decadic
Signaling
Generator
User
Modem
Exchange
Exchange
Modem
Figure 43 – Decadic Signaling Acceptance Test
IV – configure the decadic signaling generator to generate signaling pulses with opening time of 58
ms and closing time of 40 ms;
V – generate a signaling that permits to make a call and check whether the call was forwarded
correctly, by the receipt of the ring tone current in the telephone;
VI – configure the decadic signaling generator to generate signaling pulses with opening time of 77
ms and closing time of 28 ms;
VII – generate a signaling that permits to make a call and check whether the call was forwarded
correctly, by the receipt of the ring tone current in the telephone;
VIII – configure the decadic signaling generator to generate signaling pulses with opening time of
77 ms and closing time of 40 ms;
IX – generate a signaling that permits to make a call and check whether the call was forwarded
correctly, by the receipt of the ring tone current in the telephone;
Art. 136 To measure the acceptance of Multi-Frequency Signaling in the voice interfaces, use the
assembly of Figure 44 and follow the procedure below:
Voice
Interface
User
Modem
Exchange
Modem
Sinusoidal
generator
Selective
Meter
Exchange
Figure 44 – DTMF Signaling Acceptance Test
56
I – use a balanced selective meter M with high input impedance (≥ 50 kΩ), with a bandwidth
smaller than or equal to 25 Hz, capable of measuring the power with relation to 600 Ω;
II – adjust the DTMF generator so that the power measured by meter M is -8 dBm for the high
group frequencies and -10 dBm for the low group frequencies;
III – configure the DTMF generator to generate the duration and pause times for the 60 ms signal;
IV – configure the DTMF generator to generate the frequencies of the signals deviated by +1,5%
with regard to the nominal values;
V – make calls containing all possible digits and check whether the calls are forwarded correctly;
VI – configure the DTMF generator to generate the frequencies of the signals deviated by -1,5%
with regard to the nominal values;
VII – make calls containing all possible digits and check whether the calls are forwarded correctly;
Section II
Performance Requirements
Art. 137 To execute the terminal performance tests, use the assembly of Figure 45 and follow the
procedure below:
User
Modem
Pattern Generator /
Meter
Line
Simulator
Noise
Generator
Exchange
Modem
Pattern Generator /
Meter
Figure 45
I – use pattern generators with 64 kbit/s rate, capable of generating a pseudorandom bit stream with
215-1 in length. The bit error rate should be measured after the transmission of 100 million bits;
II – configure the line simulator according to the provisions specified in Art. 78, and the noise
generator according to the provisions specified in Art. 81 and Art. 82;
III – measure the error rate for the conditions required.
57
Section III
Electromagnetic Compatibility Tests
Art. 138 The terminal should be tested according to regulation mentioned in Art. 83, with regard to
the electromagnetic compatibility aspects, in the following conditions:
I – use the test setup shown in Figure 46;
User
Modem
Pattern Generator /
Meter
Artificial
Line
Exchange
Modem
Electromagnetic
Interference
Generator
Pattern Generator /
Meter
Figure 46
II – use an artificial line to simulate a 0.40 mm cable with 3 km in length;
III – configure the data communication terminal equipment to transmit at the speed of 64 kbit/s;
IV – configure the pattern generators to send a pseudorandom bit stream with 215-1 in length;
V – during the interference immunity test, check whether the error rate is kept smaller than or equal
to 1x10-7.
VI – To evaluate the error rate, at least 100 million bits should be sent;
VII – upon the completion of the electromagnetic disturbance resistibility test, the data terminal
equipment operation should be evaluated through data transmission/reception, and Longitudinal
Balancing measurement, as provided in Art. 30.
Section IV
Electric Safety Requirements
Art. 139 The data terminal should be tested according to the specific regulation for the electric
safety aspects.
58
TITLE VI
SANCTIONS
Art. 140 The infringement as well as the non observance of the obligations undertaken in the
application of this Regulation will subject the infringers to the following sanctions, applicable by
the Agency, observing the provisions of Title VI “Sanctions”, of Book III, Law No. 9.472 of 1977.
I – for an act or omission that characterizes a violation of the user rights defined in this Regulation
or that could cause losses to the users: penalty up to R$ 30.000.000,00 (Thirty million reais);
II – for the non observance of the obligations referring to product certification: according to the
provisions of the specific regulation.
§ 1 The infraction prescribed in paragraph I will be characterized by the impossibility of the user to
access the service due to the non observance of the standards established in this Regulation.
§ 2 The infraction prescribed in paragraph II is characterized in specific regulation.
TITLE VII
TRANSITORY PROVISIONS
Art. 141 With relation to the provisions of Title II, Chapter IV of this Regulation, other means of
signaling will be accepted for a period no longer than 6 months after the date of the publication of
this regulation.
TITLE VIII
HOMOLOGATION IDENTIFICATION
Art. 142 The Terminal Equipment should bear Anatel’s identification seal legibly, according to the
model and instructions described in Art. 38 and Attachment III of the Regulation for the
Certification and Homologation of Telecommunications Products, attached to Resolution No. 242,
of 11/30/2002, including Anatel brand logotype, the homologation number and identification per
bar code.
59