Telephone Installation
Station Apparatus
Strata DK40 I&M Manual Spring 1999
5-3
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
Telephone Installation
This section describes the wiring required to connect telephones to the system. Before
installing any telephone wiring, read the following warning and caution notes:
CAUTION!
When installing the station cable, do not run the cables parallel if they
are within three feet of an AC power line. AC power lines should be
crossed at right (90°) angles only. In particular, avoid running station
wire pairs near devices that generate electrical noise, such as neon or
fluorescent light fixtures.
System Connection
Digital Telephones
The following provides information on how to connect digital telephones to the DK40
system.
Note
Before proceeding, see warning and caution notes in “Telephone Installation”.
Digital telephones connect to the digital telephone ports via the MDF with standard CW1308
twisted-pair jacketed telephone cable. Single-pair wiring is sufficient in most cases for digital
telephones to operate effectively at up to 305 metres from the system.
But digital telephones that are equipped with RPCI Unit or ADMs should have two-pair (or
external power) to function effectively at this distance. This also applies to digital telephones
supported by systems that must operate with battery reserve power–Chapter 2 – DK40
Installation, “Digital Telephone/DDSS Console/ADM/Loop Limits” on Page 2-53.
To accommodate the digital telephone line cord, the cable should be terminated in a BS6312
modular connector which then plugs into a slave LJU at the station location. The standard
single-pair, modular digital telephone cord that is sent with the telephone is 3 metres, the
maximum allowed is 10 metres and has a BS6312 type connector at the LJU end of the lead.
See Chapter 4 – DK40 Universal Slot PCB Wiring for more details.
WARNING!
➤
Never install the telephone wiring during a lightning storm
.
➤
Never install the telephone jacks in wet locations, unless the jack is
specifically designed for wet locations.
➤
Never touch uninsulated telephone wires or terminals unless the
telephone line has been disconnected at the network interface.
➤
Use caution when installing or modifying telephone lines.
➤
If telephone, DSS console, door phone control box, or door phone wiring
exits the building, external secondary protection is required.
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