Paradyne 3800Plus Modem User Manual


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COMSPHERE 3800
Plus
Modems
U.K. Supplement
Document Number 3980-A2-GK40-20
November 1996
Overview
This document highlights government requirements, safety warnings, installation procedures, features, and
functions that are unique to COMSPHEREr 3800Plus modems installed within the United Kingdom. This
document is intended to be used in conjunction with the COMSPHERE 3800Plus Modems User’s Guide,
Document No. 3980-A2-GB30. Please consult the User’s Guide for overall operation of the 3800Plus modem.
Regulatory Information
Ringer Equivalence Number
The Ringer Equivalence Number (REN) is a customer guide indicating approximately the maximum number of
items of apparatus that should be connected simultaneously to the telephone line. The sum of the RENs should
not exceed four. This value includes any BT-provided instrument which may be assumed to have a REN of 1
unless marked otherwise. The REN of this modem is 1.
Connection to Leased Lines
If any other apparatus, including cable or wiring, is connected between the apparatus and the point of connection
to any speechband circuit, then all that other apparatus shall comply with the following:
1. The overall transmission characteristics of all that other apparatus shall be such as to introduce no material
effect upon the electrical conditions presented to one another by the apparatus and the speechband circuit;
and
2. All that other apparatus shall comprise only:
(i) apparatus approved for the purpose of connection between the apparatus and a speechband circuit; and
(ii) cable or wiring complying with a code of practice for the installation of equipment covered by this
part of BS 6328 or such other requirements as may be applicable.
This modem is suitable for connection to BT circuits with signalling at a nominal frequency of 2280 Hz and may
be connected to multipoint or point to point circuits. The apparatus does not require signalling or otherwise use
the frequency range 0–200 Hz.
No d.c. interaction is intended between the modem and the telephone network.
This apparatus may be directly connected to a speechband circuit or connected to a relevant branch system for
speechband circuits.
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