GDK-100
DIGITAL KEY TELEPHONE SYSTEM
125
3.5.7.3 PRIB
wiring
PRIB is capable of connecting to 1 Primary Rate Trunk lines through an RJ45 type jack.
The contact assignments of RJ45 type jack on PRIB show in figure 3.5.7.3.a.
The TX pair of RJ45 type jack on PRIB is connected to the RX pair of DSU, and the RX one on PRIB is to
the TX one of DSU as Figure 3.5.7.3.b.
Note:
1. Connect the TX pair of RJ45 type jack on PRIB to the RX pair of DSU and
vice versa
.
2. PRIB is capable of connecting with 1 PRI line.
Figure 3.5.7.3.b
PRI trunk line (TE connection) wiring
DSU (NT-Box)
PRIB
RJ45 type jack
RX
RX
TX
TX
1
2
4
5
1
2
4
5
TX
TX
RX
RX
From/to PX
Figure 3.5.7.3.a
Contact assignments of RJ-45 type jack of PRIB
1 2 3 4 5 6 7 8
RX
TX
GND (T)
GND (R)
RX
TX
Note: Only two pairs of RX and TX are typically connected with RRI line.