Safety Instructions
F
3825-A2-GB30-20
November 1996
United Kingdom
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.
Connection to Supply Mains
IMPORTANT: The wires in the mains lead supplied with this equipment are coloured in accordance with the following code:
Blue — Neutral
Brown — Live
As the colours of the cores in the mains lead of this equipment may not correspond with the coloured markings identifying the
terminals in your plug, proceed as follows:
•
The core which is coloured blue must be connected to the terminal which is marked with the colour N or coloured black.
•
The core which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red.
All European Countries
Safety Notice
For pluggable equipment, the mains socket outlet shall be installed near the equipment and be easily accessible.
Interconnection circuits between this modem and any other equipment should be such that the equipment continues to comply with the
requirements of EN41003 for TNV (Telephone Network Voltage) circuits and EN60950 for SELV (Safety Extra Low Voltage) circuits
after making connection between circuits.
The power supply must be properly connected and switched on before the modem will work correctly.
