CAMTECH/S&T/2009/HB/MCVR/1.0
Hkkjr ljdkj – GOVERNMENT OF INDIA
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A MAINTENANCE HANDBOOK ON
MULTI CHANNEL VOICE RECORDER
dSeVsd@,lVh@2009@,pch@,elhohvkj@1-0
CAMTECH/S&T/2009/HB/MCVR/1.0
fnlacj 2009
December 2009
Maharajpur, Gwalior
2
CAMTECH/S&T/2009/HB/MCVR/1.0
FOREWORD
Multi Channel Voice Recorder is a vital equipment for voice logging of various
Railway control circuits and other important voice circuits for its subsequent use.
It plays an important role in incidences analysis and a feedback to system
improvements.
Keeping above in view, CAMTECH has developed this handbook to help
maintenance personnel in enhancing their knowledge regarding installation and
maintenance of Multi Channel Voice Recorder.
I hope that this handbook will prove useful in efficiently maintaining Multi Channel
Voice Recorder and related systems.
CAMTECH Gwalior
Date: 31.03.2010
Multi Channel Voice Recorder
S.C.SINGHAL
Executive Director
December’ 2009
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PREFACE
CAMTECH has prepared this handbook to help field staff in the maintenance
of Multi Channel Voice Recorder. Apart from working and maintenance practices
this handbook also covers installation procedure, functioning and troubleshooting
of the equipment. For better understanding of concepts, a Multi Channel Voice
Recorder equipment developed as per RDSO’s specification no.
RDSO/SPN/TC/38/2002 (Rev.1.1) with Amendment No.-1 has been taken as
base.
It is clarified that this handbook does not supersede any existing provisions laid
down in the Telecommunication Manual, Railway Board publications and
prevalent Zonal Railways instructions. The instructions given in it are for the
purpose of guidance.
We are sincerely thankful to RDSO, Lucknow, RDSO approved manufacturing
firms and Railway field maintenance staff who helped us in preparing this
handbook.
CAMTECH Gwalior
Date: 31.03.2010
Multi Channel Voice Recorder
JAGMOHAN RAM
Director (S&T)
December’ 2009
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CAMTECH/S&T/2009/HB/MCVR/1.0
CONTENT
Chapter
No.
Description
Page
No.
1.
Introduction
1
2.
System Setup
8
3.
General
Specifications
15
4.
Troubleshooting
18
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Chapter 1
Introduction
Railway Control has very important role to improve the general working of
trains and increase the efficiency. The basic elements of control working
are Control office, Way side stations and communication in between them.
Section controllers at the Divisional HQ make communications with way
side stations on the communication system as provided by S&T
department for effective Train operations. The voice records of these
control circuits and other important circuits are required for its subsequent
use to meet Railway’s operational needs. Various Zonal Railways and
divisions are using Multi Channel Voice Recorder to achieve this.
This handbook covers brief description of Installation, Maintenance and
Troubleshooting of SmartLogger-V2, a Multi Channel Voice Recorder
equipment developed by joint effort of RDSO and M/s AE Telelink
Systems Ltd. as per RDSO’s specification no. RDSO/SPN/TC/38/2002
(Rev.1.1) with Amendment No.-1.
1.1
General Description
This is a system for recording of control circuits and other important
circuits as deemed necessary in the control office for its subsequent use
required for Indian Railway’s operational needs.
The equipment can also be used as a missed call monitor.
VDRPU – Voice and Data Recording and Processing Unit (shown in
Figure 1.1) forms the heart of this system.
Figure 1.1 VDRPU Smart Logger unit
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1.2
VDRPU Description
• VDRPU is compact, standalone, self contained 4 channel digital voice
logger.
• VDRPU consists of an
— In-built hard-disk for continuous 24 hr recording.
— An LCD and Keyboard interface for search and playback.
— Stereo jacks for online monitoring
— LEDs of indication of channel recording status
— Ethernet interface to connect to PC for voice record retrieval,
search, playback and backup.
• This system is stackable and an unlimited number of 4 channel logger
units can be stacked to create a single system (shown in Figure 1.2). Each
VDRPU unit can record 4 channels simultaneously. The scalability of the
system will depend on the processing power of the PC.
• When connected to the PC recording takes place simultaneously in PC
and the storage of the unit. In the event of failure of any of the storage
devices the recording continues uninterrupted in the alternate storage
device. This provision allows for continues recording in events like PC
shut down, hard-disk failure etc.
Figure 1.2 VDRPU stackable units
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1.3
VDRPU Voice Logging System Item description
• 19 inch Rack for housing
• Branded PC for redundant recording and operations like search and
playback of voice records.
• 17 inch LCD monitor, DVD writer.
• 1-4 VDRPU 4 channel units.
• Speakers
• Headphones
• UPS
1.4
VDRPU Voice Logging System Features
• VDRPU 4 channel device is used to record analog voice communications
(shown in Figure 1.3). The source of the voice data can be
— Analog telephone lines
— HF/VHF/UHF Transceivers
— 2 Wire E&M
— V-Sat voice terminals
— GSM phones using FCTs (Fixed Cellular terminals)
Figure 1.3 VDRPU unit channel source
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• In addition to recording voice calls the unit can also record
— SMS text messages
— Fax messages
• The unit can store more than 1400 hours of voice records on a 40GB
hard-disk. The signal is recorded along with date / time stamping and
DTMF/FSK tone data, so that calls can be easily searched.
1.5
Logger Configuration
All the separate VDRPU units are connected to a 10/ 100 Mbps multi port
Ethernet switch via Ethernet cable and this switch provides connectivity to
the PC (shown in Figure 1.4).
Figure 1.4 Logger configuration
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1.6
Testroom Connectivity
Voice input for VDRPU can be taken from any control circuit or other 2W/
4W circuits by direct patching as shown in Figure 1.5. The Voice Logger
System should be installed in Testroom as patching can easily be
provided there.
Figure 1.5 Testroom connectivity of VDRPU
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1.7
Panel Description
Ethernet ports, 2W/ 4W voice input ports, and power supply interface are
provided on rear side of logger unit as shown in Figure 1.6.
Figure 1.6 VDRPU Rear side
Display Panel, Indication LEDs and Audio interface are provided on the
front panel (Figure 1.7) of the unit.
Figure 1.7 VDRPU Elevation
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•
Display panel: By attaching external keyboard in the front side keyboard
interface, VDRPU can be configured by various function keys F1, F2, F3
and F4 as displayed in the front display panel.
•
PWR LED: The Power LED glows when the power is supplied to the
system and the on-power system check is OK.
•
Channel Recording LEDs: It glows when the recording is on in the
respective channel.
•
Audio Interface: Playback can be either from internal speaker or from
external speaker (on attachment). Monitoring of any channel can be done
by attaching earpiece jack to the respective audio interface port.
1.8
VDRPU Voice Logging System - Features
• Scalable in multiples of 4 channels.
• Based on DSP processor
• Modular construction
• Easily installable and user-friendly windows based software interface
• Easy to perform backup to any storage media like CD, DVD.
• LED indication for status of every channel
• Stores date, time, duration, call type, CLID, CNID and other information for
every voice record.
• Allows flexible search and playback of voice records as per date, time,
CLID, CNID etc.
• Stores voice record in universally accepted .wav format.
• Uses Ethernet to transfer data to the PC.
• Computer programmable selection of VOX, off hook to trigger call
recording.
• Simultaneous monitoring of voice call through headset for each channel
each
• Provides data redundancy by having on-board hard-disk in addition to the
PC hard disk.
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Chapter 2
System Setup
2.1
Recommended Procedures for Installation and Operation
2.1.1
In case it is needed to stack more than 3 loggers on top of each other
due to space reasons. It is recommended that a 19 inch Rack be used.
The Logger comes with Flanges for Rack mounting. This makes
maintenance of Loggers easier.
2.1.2
All power plugs and more importantly adaptors (such as that for
switches) must be set horizontal and fit snugly It has been observed that
adaptors due to their weight tend to not connect reliably when placed
vertically. The extension boards must be raised from the ground and on
the shelf.
2.1.3
Drinks and Food must not be allowed in the logger area.
2.1.4
Logger PC must not be used for any other work during recording hrs.
Even after recording hrs, it is recommended that the Logger PC is not
used to access the internet/chat etc. This increases the possibility of the
PC getting infected with virus, spy ware etc that can damage or
slow down the PC. However, standalone applications like excel, word
etc. can be used after recording hrs.
2.1.5
If the phone line technician visits the site for any reason such as
installing addition lies etc., the existing phone recordings much be
checked before the person leaves the site. This is because while fixing a
line on the MDF board some parallel connections may get loose and
therefore recording may stop.
2.2
Software Installation
Identify the PC that meets the requirements mentioned in section
‘Additional Hardware for SmartLogger-V2’ and ‘Additional Software for
SmartLogger- V2’.
Set a static IP address on the server PC. This is usually done by the
network administrator on the site or by the engineer who installs the
Logger. Insert the CD into the CD Drive.
Run Explorer – Right Click on ‘Start’ and select ‘Explore’.
Navigate to the ‘Server’ directory in the CD.
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Double-click on ‘Setup.exe’.
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Click ‘Next’.
Browse to the directory where you want to install the application. Note: This
drive must have enough disk space as the call records will be stored here.
It is recommended that a separate partition like ‘d:’ be created and
software be installed in‘ d:/SmartLoggerV2’.
Click ‘Next’.
Click ‘Next’.
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Click ‘Close’.
During the setup a shortcut to the application named as ‘Shortcut to
SmartLoggerV2.exe’ is created on the desktop. To run the application
double- click this icon on the desktop.
2.3
Initial Configuration
2.3.1 Set the Branch ID
Run the application by double- clicking on ‘Shortcut to SmartLoggerV2.exe’
on the desktop. The first time the application is run it will ask for the
‘Branch ID’.
Click OK.
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Enter the ‘Branch ID’. This ID is attached to each voice record to uniquely
identify it among the voice records of different sites. Click ‘Ok’
Click ‘OK’. The Branch ID is set and the application automatically closes.
2.3.2 Configuring the Loggers
Connect the 2W/ 4W lines into TEL1, TEL2, TEL3 and TEL4 on the back
side of the Logger. The connectors used to connect these lines are called
RJ11 connectors.
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LAN
RS232 / Serial
Port connection
Parallel
telephone
Connection
Connection
Connect the Logger to the PC directly (if not part of the LAN) by using a
CAT5 cable connection between the Logger and the PC. The connector
used to make this connection is called RJ45.
OR
Connect the Logger to the PC through the LAN by connecting the Logger
to the network switch by a CAT5 cable.
Power up the Logger.
On every logger the following must be set
Logger IP address, Server IP Address, Subnet Mask
Date/Time for Logger Clock
Off-hook/On-hook Levels
To do so Connect the RS232/Serial port of the Server PC to the Logger
being configured using the serial cable.
Start
the
application
by
double-clicking
SmartLoggerV2.exe’ on the desktop.
on
‘Shortcut
Login to the application. Click ‘Login’.
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Enter ‘UserName’ as ‘admin’ and ‘Password’ as ‘111’.
Click ‘Login’.
2.4
Software Details
• The software has all the features required by the user to setup and use
the loggers.
• Facility to monitor, search, playback, tag, backup, delete, view backup etc.
is present in the software.
• Features like scheduled deletion and backup are also present.
• Merge voice record facility (used in VOX operated VHF/UHF recording)
• The software has been made on .Net 2.0 using C#.
• .Net allows the software to be platform independent wherever framework
2.0 is installed.
• Software is based on Client-Server concept such that all user can access
the server from anywhere on the LAN to perform routine operations of
search and playback on the voice records.
• Depending on the data size either MSACCESS or SQL server can be
used as the database.
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Chapter 3
General Specifications
3.1
The equipment does have a capacity to record a minimum of 4 and
maximum of 16 numbers of conversations simultaneously of different
control circuits for at least 170 hours per channel. The recording capacity
per channel can be increased beyond 170 hours as per requirement by
increasing the capacity of hard disk at the additional cost.
3.2
Input to the system is taken from trans and receive port of electrical
circuits of the respective channel with a level of at least 20dB below the
electrical signal level transmitted into the control circuit network and with a
compatible level of the receive signal of the channel/ circuit as per design
of the system.
3.3
The system has an Interface for each channel separately for inputting from
Control Circuit of 2 wire E / M or 4 wire E / M or Telephone Line or
Wireless, any one at any one time. It is possible to have different variety of
inputs to different channels.
3.3.1
Telephone Interface:
3.3.1.1 Telephone interface takes input from analogue telephone lines with tip
and ring connection in parallel and have an input impedance of more
than 20 K Ohms at 1 KHz.
3.3.1.2 Bandwidth of networking is + / - 1 dB for a frequency range from 300 Hz
to 3400 Hz.
3.3.2
Hard ware for different sub-systems:
3.3.2.1 The system is rugged enough to withstand continuous working round the
clock in non-air-conditioned room with the temperature, humidity and
dust extremes encountered in the area of operation.
3.3.3
Voice Recording inputs for 16 channels:
3.3.3.1 Monitoring facility of any channel is provided either through VDRPU
(Voice Data Recording & Processing Unit) or PC without interrupting
ongoing recording of any channel.
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3.3.3.2 The volume level is from – 40dBm to + 9dBm (electrical) with a signal to
noise ratio of 26 dB (electrical).
3.3.4
Storage Equipment:
3.3.4.1 The storage device is a hard disk of suitable capacity as per requirement
fitted into the PC and another hard disk of the same capacity is fitted in
the VDRPU. It is possible to retrieve data from either hard disk.
3.3.4.2 The software is having facility to provide either manual or automatic
backup. The backing up process does not interfere with the normal
functioning of the equipment. It is also possible to copy any selected
record on floppy, CD-R, DVD-R or removable separate hard disk or flash
memory or any other memory device attachment. The backup software
is fully integrated with the system.
3.3.5
Play back of all the Individual Voice Recordings:
3.3.5.1 There is provision of on line monitoring of any channel through VDRPU.
The playback can be either speaker or from earphone jack to listen
desired conversation of any selected channel.
3.3.6
Alarms of the system:
There are alarms and indications for:
a.
b.
c.
Voice card not responding.
All the back up devices are full/ failure.
Any other abnormal conditions.
Alarms are screened display on monitor as well as verbal message of
speaker of PC.
3.4
Voice Data Recording & Processing Unit (VDRPU)
3.4.1
The system is having facility for recording of continuous voice data on
hard disk from control & other circuits, in addition to the recording and
processing of same data into PC hard disk. VDRPU is having
independent online processing, recording and monitoring facility so that
in case the PC crashes the recorded data can be retrieved from these
units without interrupting ongoing recording.
3.4.2
VDRPU front panel have following arrangements:a)
b)
Visual Indication for ongoing recording of channel through red LED.
Channel number can be screen printed below the LED indication.
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c)
Audio interface for online monitoring of any channel by inserting
audio jack with headphone.
3.4.3
DRPU hard disk data can be transferred to PC for playing but can not
take data from PC so that recorded voice of the channels in VDRPU
hard disk can neither get corrupted by any virus in the PC nor get
affected in case the PC crashes.
3.4.4
There is a provision of online monitoring of any channel through PC or
VDRPU. The play back can be from speaker as well as earphone jack to
listen the desired conversation of the channel.
3.5
Power Supply:
The system works on AC power supply from 180 volt to 260 volt at 47 to
53 Hz frequencies. The power requirement of the entire equipment is
less than 500 watt. A UPS system power back is provided to support the
system working for at least one hour.
3.6
VDRPU Voice Logging System – Technical Specifications:
Channels
:
Analog (In multiples of 4)
Voice Coding Methods :
64 Kbps G.711 A/u law PCM
Record Trigger Modes :
Parallel off hook, VOX, Forced, Ring
Trigger
Frequency Response :
300-3400Hz +/-3dB
Analog Input
:
Impedance 600Ω or >10KΩ,
Balanced and Unbalanced
SNR
:
Better than 40dB
Distortion
:
Less than 3%
Crosstalk
:
Better than 40dB
Recording Sensitivity
:
Better than 40dBm
Power
:
12V +/- 10% , 1A DC
Telephone Port
:
RJ11
PC Recording Port
:
10BASE-T, RJ-45, UTP
Temperature
:
Operating: -10˚C to 55˚C
Storage: -40˚C to 70˚C
Humidity
:
40˚C, RH 95%
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Chapter 4
Troubleshooting
4.1
SmartLogger V-2
4.1.1 Power LED does not glow
The power LED glows when the power is supplied to the system and the
on-power system check is OK.
•
Check the power connection and if the switch is ON. If the power
LED does not glow, notify technical support.
4.1.2 Channel Recording LED does not glow on off-hook
•
If it is 2W Exchange line then check if the parallel phone connection
is OK. To do so pullout the RJ11 from the Logger unit and connect
it to a phone instrument. You must hear a dial tone. If not have the
line check by a phone linesman. If it is 4W line then check the voice
on line.
•
If the line is OK. Try setting the off-hook threshold voltage to a
different value.
•
If the above does not work, check if the line has excessive noise.
The crimpling may be loose. To do so, connect a headphone to the
direct monitoring jacks next to the channel LEDs. The sound heard
on these jacks comes directly from the phone line.
4.1.3 Noise in recording
•
Check if the noise in the recording is due to the parallel phone
connection or due to the Logger. To do so, insert a headphone in
the monitoring jack next to the channel being diagnosed. Listen to
the sound. This is the sound on line. If it is clear, it implies that the
phone connections are fine. If not, have the linesman check the
parallel phone connections. The crimping may be loose.
•
If the sound heard on the monitoring jack is clear, listen to the
recording voice. To do so, insert a jack in ‘Ext Spk’, connect a
keyboard to the SmartLogger-V2 and press F4 and then the
channel number. The sound heard is the sound being recorded by
digitization by the Logger.
•
If the recorded sound is noisy but not the direct sound, contact
technical support.
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4.2
Server Software
4.2.1 Some calls show ‘fax’ as call type whereas there is no fax machine
connected to the line
•
The SmartLogger-V2 has the capability to record incoming and
outgoing fax. A fax call is detected by the logger by the fax tone
which is a tone of 1100Hz. This tone can sometimes be generated
during a voice call by the user (whistling) or due to some
background noise. However, this is rare.
•
Note, even though the call has been tagged as ‘fax’, the voice data
is stored as a regular call that can be downloaded and played.
4.2.2 Recording not happening on the Server Software but happening on
the Logger
•
This is may be due to
a. LAN connectivity between the Logger and Server PC.
b. IP configuration of the Logger and the PC.
c. Software version of the PC software.
•
•
The server software version must be 5.5.5.4 or higher.
Find out the IP address of the Logger. This must be already known
or refer section ‘Finding the IP Address of SmartLogger-V2’.
•
Check the LAN connectivity between the Server PC and the Logger
using the ping command. Refer section ‘Checking LAN/Network
connectivity between two LAN/Network devices – The ‘ping’
command’. If connected proceed to the next step. If not contact the
network administrator.
•
Check if the host IP setting in the Logger is same as the IP address
of the PC. To find out the IP address of the PC refer section
‘Finding the IP address of a PC – The ‘ipconfig’ command’. To
check the host IP address setting in the Logger refer section
‘Finding the IP Address of SmartLogger-V2’. The IP address of the
PC and the Host IP setting in the Logger must be the same. If not
reconfigure the Logger.
•
Check the Logger IP Address setting in the server software
application. It should be the same as the Logger IP Address.
•
Now lift any phone channel. You should see a recording indication
on the main screen. If still recording is not shown on the server
application contact technical support.
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4.2.3 Runtime Error
•
Check the hard-disk space on the PC. If the hard-disk is full, the
application may encounter runtime errors. To solve this issue,
delete some files such as backup folders etc. from the PC. Run the
application and delete some voice record data from the PC to free
up disk space. If hard-disk is free and runtime errors persist.
•
Close and restart the application.
•
If the above does not solve the errors, compact and repair the
database. To do so, open the voicelogger.mdb file from the folder
where SmartLogger-V2 server application has been installed.
Select ‘Compact and Repair’ from the ‘Tools’ menu.
•
Close the voicelogger.mdb file.
•
If the runtime error still persists, restart the PC.
•
If the runtime error still persists, contact technical support.
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References:
1. RDSO Specification No. RDSO/ SPN/ TC/ 038/ 2002 Rev 1.1
2. User Manual of SmartLogger – V2 of AE Telelink Systems Ltd.
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