Huawei BTS3900C Hardware Description page 165

BTS3900C (Ver.C)
Hardware Description
Exterior
The E1/T1 surge protection transfer cable has a DB26 male connector at one end and a DB25
male connector at the other end, as shown in
Figure 7-26 E1/T1 surge protection transfer cable
(1) DB25 male connector
Pin Assignment
Table 7-30
cable.
Table 7-30 Pin assignment for the wires of the E1/T1 surge protection transfer cable
Pin on the DB25 Male
Connector
X1.20
X1.19
X1.4
X1.3
X1.22
X1.21
X1.6
X1.5
X1.24
X1.23
X1.8
X1.7
X1.1
X1.2
Issue 03 (2013-05-27)
describes the pin assignment for the wires of the E1/T1 surge protection transfer
Type
Twisted pair cable
Twisted pair cable
Twisted pair cable
Twisted pair cable
Twisted pair cable
Twisted pair cable
Twisted pair cable
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Figure 7-26.
(2) DB26 male connector
Pin on the DB26 Male
Connector
X2.2
X2.3
X2.4
X2.5
X2.6
X2.7
X2.8
X2.9
X2.10
X2.11
X2.12
X2.13
X2.14
X2.15
7 BTS3900C Cables
156