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Purpose
The following describes required standards for telephone equipment and
customer-owned internal wiring for use in the provision of basic telephone
services. It is also intended to provide specific guidelines to suppliers
of telephone instruments, which will be connected to CWDs network. Compliance
with the requirements outlines in this document will ensure that customer-owned
internal facilities are for the purpose and will operate at optimal levels
with CWD systems.
Telephone Standards
The following standards are mandatory and apply to telephones connected
to the CWD network:
- EIA 470-B Telephone Instruments with Loop signaling (July 1987)
- FCC part15 Radio Frequency Devices (April 1999)
- FCC part 68 Connection of Terminal Equipment to the Telephone Network
(October 1998)
- UL 1459 Second Edition Safety for Telephone Equipment
- UL 94 Safety for Test for Inflammability of Plastic Materials for
Parts in Devices and Appliances (May 1998)
- ITU E161 Arrangements of Digits, Letters and Symbols on Telephones
and other devices that can be used for gaining access to a telephone network
To ensure an even higher level of reliability, CWD has developed the
following standards which are discretionary:
- Telephone instruments supporting flash hook duration in the range of
400 to 800 ms
- Telephone instruments designed to operate under the following environmental
conditions
- Operating temperature range of up to 40?C
- Relative humidity of 5% to 95% at temperatures up to 40?C
C&W Specific Requirement
For connection to CWDs network, telephone instruments must be equipped
with RJ 11 Jack for 2-wire connection.
Interior Wire
The following standards are mandatory, and apply to interior wiring
connected to the CWD network:
- FCC part 68 subsection 68.213-215 Installation of System Premises
Wiring (October 1998)
- EIA/TIA 568 Commercial Building Wiring Standard (October 1995)
- UL 1581 Standards for Safety for Reference Standard for Wires, Cables
and Flexible Cords (June 1999)
- UL 444 Standard for Safety Communications Cables (June 1998)
- UL 1863 Standard for Safety for Communication Circuit Accessories (June
1998)
To ensure a high level of reliability, it is recommended that: Modular
Jacks are of the gel-filled type.
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