3. Installation
9752 Installation Guide
Page 34
497098 Issue 3
Connecting the Telephone Line
Connecting the telephone line directly to the terminals on the internal
communicator, or indirectly through other apparatus, can produce hazardous
conditions on the telephone network. Always seek advice from a competent
telephone engineer if in any doubt about connecting to these terminals.
Example – connecting a line in the UK:
The internal communicator must be connected to the PABX system by:
a) If the wiring is owned by British Telecom:
British Telecom.
b) If the wiring is not owned by British Telecom, one of:
(i) British
Telecom.
(ii) The authorised maintainer.
(iii) A professional Installer, after 14 days written notice to the
authorised maintainer.
To connect the telephone line:
a) If the telephone line is already terminated with a suitable lead and plug:
Insert the plug into the RJ11 connector.
b) Otherwise (see Figure 26):
(i) Using a two-core telephone cable, strip off 5mm and feed the cable
through one of the entries in the rear of the control unit. Connect
the two cores to terminals A and B on the main PCB.
(ii) Connect the other end of the two cores to the corresponding
terminals on the BT master box.
(iii) If other apparatus is to share the telephone line with the internal
communicator (in series), connect the main apparatus to the series
switched line connections marked A1 and B1.
Caution: Only one such series apparatus is allowed to be connected
between a main apparatus (such as a telephone) and the PSTN.
Ensure that the A and B lines are connected the right way around. The
internal communicator continuously monitors the line for ringing tones.
5 or A
2 or B
Primary
Line
Diverted
Line
A
B
B1
A1
BT master Box
(Exclusive Line)
Telephone line to other equipment
for example: Fax, answer machines.
Figure 26. Connecting the Internal Communicator
