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GDK-100
DIGITAL KEY TELEPHONE SYSTEM
114
3.5.6.3
BWDIDB wiring - New Zealand
BWDIDB is capable of connecting 4 DID lines through a RJ21 type male connector on the board
The cable with RJ21 type female connector is required between PFTU connector and MDF. It is possible to
get the cable locally, or use GDK-162 5MC1 supplied by LGIC on the order if necessary.
The MDF that is in wide use in your country can be locally used according to the requirements of local
regulation.
Note:
1. The BWDIDB is polarity-sensitive, so it is important to check the polarity of wires when
wiring. In idle state, –48V is fed on Ring wire, and Reference is on Tip wire in GDK-100
system.
2. BWDIDB board is capable of connecting to up to 4 lines.
Figure 3.5.6.3
BWDID line wiring
M
D
F
1
26
4
29
R4
T4
BWDIDB
RJ21 type connector
on board
25
50
R1
T1
2
27
R2
T2
3
28
R3
T3
Network
T
R