GDK-100
DIGITAL KEY TELEPHONE SYSTEM
123
3.5.7.1 BRIB
wiring
BRIB is capable of connecting 4 Basic Rate Trunk lines through RJ45 type jacks.
The contact assignments of RJ45 type jack on BRIB show in figure 3.5.7.1.a.
The TX pair of RJ45 type jack on BRIB is connected to the RX pair of NT1, and the RX one on BRIB is to
the TX one of NT1 as Figure 3.5.7.1.b.
Terminating resistors should be required on each line to match line impedance. See clause 3.5.7.4.
Note:
1. Connect the TX pair of an RJ45 type jack on BRIB to the RX pair of NT1 and
vice versa
.
2. Check terminating resistors. See clause 3.5.7.4.
3.
BRIB is capable of connecting to up to 4 lines.
Figure 3.5.7.1.b
BRI trunk line wiring
Figure 3.5.7.1.a
contact assignments of RJ-45 type jack
of BRIB
1 2 3 4 5 6 7 8
RX+
RX-
TX-
TX+
NT1 (NT-Box)
BRIB
RJ45 type jack
TX+
TX-
RX+
RX-
3
6
4
5
3
6
4
5
RX+
RX-
TX+
TX-
From/to PX