14
Connect terminals 2 and 5 on the Terminal Block at the back of the ADT socket across
the A and B terminals (TB5) on the Accord xpC, refer to figure 2.10
REN and SEN Numbers
It is possible to simultaneously connect a number of items to one line of the PSTN. The
limit is determined by summing the Ringer Equivalence Number (REN) shown on each
item of apparatus, ensuring that the sum of RENs is not more than four.
The REN of the Accord xpC is one (1).
Assume that all British Telecom equipment has a REN of one unless otherwise marked.
More than one item of series apparatus may be connected to the Accord xpC ports marked
phone. This is limited by summing the Series Equivalence Number (SEN) shown on
each item of series connected apparatus, ensuring that the sum of the SENs is not more
than one (1). The total series resistance, including cabling, must not exceed 50 Ohms.
• The SEN of the Accord xpC is 0.3.
• Nominal series resistance is 90 milli-ohms.
• Nominal insertion loss is 0.1 dB.
Figure 2.10. Connecting the Accord
XP
C to the PSTN
3
Supplies all other
Telephone Sockets
ADT BT BOX
A B
phone
BT MASTER
Terminal Block in the
back of ADT socket
5
2
Red
White
2
5
ACCORD xpC
CONTROL PANEL
2
5 2
3
5
TB5
INCOMING
PSTN LINE
Terminal 3=Bell Ringer
Terminal 2=Line
Terminal 5=Line
Fly lead wires:
2=Red 4=Green (not used)
3=Blue 5=White
4
Part No 2119
Captive Locking Bar
Part No 2118
Line Jack
Содержание ACCORD XPC
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