Aria-130 Digital Key Telephone System
Issue: 1.2
Installation Manual
116
3.5.7.1 BRIB wiring
BRI lines are connected to BRIB/BRIU through RJ45 type jacks.
The contact assignment of RJ45 type jack on BRIB is shown in Figure 3.5.14.a.
Figure 3.5.14.a Contact assignment of RJ-45 type jack
of BRIB
The TX pair of RJ45 type jack on BRIB/BRIU is connected to the RX pair of NT1, and the RX one on
BRIB/BRIU is to the TX one of NT1 as Figure 3.5.14.b.
Terminating resistors should be required on each line to match line impedance. See clause 3.5.7.4
Figure 3.5.14.b BRI trunk line wiring
Note:
1. Connect the TX pair of an RJ45 type jack on BRIB/BRIU to the RX pair of NT1 and
vice
versa
.
2. Check terminating resistors. See clause 3.5.7.4.
1 2 3 4 5 6 7 8
RX+
RX-
TX-
TX+
NT1 (NT-Box)
BRIB/BRIU
RJ45 type jack
TX+
TX-
RX+
RX-
3
6
4
5
3
6
4
5
RX+
RX-
TX+
TX-
From/to PX
