Telecommunications Industry Association
TR41.7-14-08-005 (Basic Functionality)
Document Cover Sheet
Project Number
ANSI/TIA-PN-571-C
Document Title
TIA 571-C Basic Functionality Considerations
Source
Randy Ivans, UL LLC
Contact
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Randy Ivans
UL LLC
1285 Walt Whitman Rd.
Melville, NY 11747
Phone: 631-546-2269
Fax:
Email: randy.ivans@ul.com
TR-41.7
X
For Incorporation Into TIA Publication
For Information
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The document to which this cover statement is attached is submitted to a TIA Engineering
Committee, Formulating Group, or sub-element thereof in accordance with the provisions of TIA
procedures including but not limited to Section 3.3.2 of the TIA Engineering Committee Operating
Procedures, all of which provisions are hereby incorporated by reference.
Abstract
The current definition of basic functionality in TIA-571-B only applies to basic
telecommunications devices. With the expansion of the scope of the document a more general
definition is needed. This contribution provides examples of performance criteria for discussion
leading to a revision of the definition for basic functionality in TIA-571.
V2.0 – 20140702
Telecommunications Industry Association
TR41.7-14-08-005 (Basic Functionality)
Existing text from TIA-571-B:
Basic Functionality
CPE’s ability to perform Send, Receive, Dialing and Alerting
Examples from IEC 61000-6-1 for consideration:
a) Performance criterion A: The apparatus shall continue to operate as intended during
and after the test. No degradation of performance or loss of function is allowed below a
performance level specified by the manufacturer, when the apparatus is used as
intended. The performance level may be replaced by a permissible loss of performance. If
the minimum performance level or the permissible performance loss is not specified by
the manufacturer, either of these may be derived from the product description and
documentation and what the user may reasonably expect from the apparatus if used as
intended.
b) Performance criterion B: The apparatus shall continue to operate as intended after the
test. No degradation of performance or loss of function is allowed below a performance
level specified by the manufacturer, when the apparatus is used as intended. The
performance level may be replaced by a permissible loss of performance. During the test,
degradation of performance is however allowed. No change of actual operating state or
stored data is allowed. If the minimum performance level or the permissible performance
loss is not specified by the manufacturer, either of these may be derived from the product
description and documentation and what the user may reasonably expect from the
apparatus if used as intended.
c) Performance criterion C: Temporary loss of function is allowed, provided the function is
self-recoverable or can be restored by the operation of the controls.
Example from Wikipedia for consideration:
Functional Testing (manufacturing)
FCT refers to functional test. The functional test is typically performed in the last phase of the production line of a
product, as a final quality control. FCT are performed to ensure that the device under test (DUT) fulfills its
functional specifications.
FCT consists in emulating or simulating the operational environment of the product in order to check its correct
functionality. The environment includes, as an example, any device that communicates with the DUT, the power
supply of the DUT, loads necessary to make the DUT work properly...
Definition for consideration:
performance specification
Written requirement that describes the functional performance criteria required for a particular equipment, material,
or product. In contrast, a design specification describe design characteristics and manufacturing methodology.
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