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4.4.4 Telephone System Summary of telephone cables required:
• 4No. 4-pair (or equivalent) from phone
From 10th Feb 2014, CAT-5E cables should be installed,
instead of standard telephone cables. These cables should system box position to location of BT DP.
still be terminated to standard telephone sockets. • 8No. CAT-5E cables from phone system box
Standard Domino’s phone line requirement is: position to front counter for handsets etc.
• 5-line group for the main store number • 1No. CAT-5E cable from phone system box
• 1 line ADSL enabled for IT link
• 1 line ADSL enabled for CCTV link and position to drivers table location
• 2No. CAT-5E cables from phone system box
modem, plus Validator safe if installed
• 2 lines for PDQ machines position to “wiring only” wall locations (See
• 1 line for security alarm link project drawing for position)
• 2No. CAT-5E cables from phone system box
As part of the electrical installation, a CAT-5E position to RJ45 sockets in office Comms
cable from the location of the telephone system Cupboard for Caller ID.
cabinet must be installed to: • 1No. CAT-5E cable from phone system box
• The extension handset positions (typically position to alarm system location (typically
in the office)
7No. in total) • TOTAL = 18 telephone system cables
• The modem/CCTV (under counter)
• The alarm (in office) Telephone system installation engineer is
• The PDQ’s machines (2No. typically under required to (this list does NOT include CAT-5 and other
counter) cables which are to be run in addition, as part of the
• The ADSL (under counter)
computer system):
Leaving each of the above in open back boxes, • Install the telephone system cabinet
the electrician must:
• Lay in 2No. CAT5 cables from the phone complete and terminate the internal
extension lines into it, including identification
system cabinet position to the Comms of cables and labelling them as necessary
Cupboard in the office, terminated in RJ45 • Connect previously laid-in link cables
sockets in back boxes, for Caller ID. between the BT DP and telephone system.
• Lay in 4No. 4-pair cables (min. 16 pairs in total • Terminate the previously laid cables for BT
required) from the position of the phone direct lines to the modem, alarm, PDQ’s and
system cabinet to the position of the BT DP. ADSL positions. (NOTE: the alarm line should be
• In some cases ISDN is installed for the main
number lines instead of Analogue lines, if this terminated within 1 metre of the alarm box, using a
is the case then one CAT5 cable should be
provided per circuit. (Please note that there is no terminal block with screw terminals)
need to provide a 4-pair cable for each line) • Supply and install telephone socket
faceplates to all of the open back boxes
• leave all cables with identifying labels at installed by the site electrician. All sockets to
BOTH ends. be labelled
Note that to make effective use of space in the counter,
the telephone sockets should be of the ‘modular’ type.
4.4.4 Telephone System 3 February 2016
