Huawei AR1200-S Series Hardware Description page 119

Huawei AR1200-S&2200-S Series Enterprise Routers
Hardware Description
Table 6-14
pair cable.
Table 6-14 Pin assignments of the E1 120-ohm or T1 100-ohm balanced twisted pair cable
Connector
Pin assignment
E1/T1 Trunk Cable Extension
The E1 75-ohm unbalanced coaxial cable is connected as follows:
l
l
Issue 03 (2012-04-20)
describes the pin assignments of the E1 120-ohm or T1 100-ohm balanced twisted
X1 (DB9)
1
2
6
7
NOTE
The E1/T1 trunk cable is 3 m long. If the connection distance is long, a cable extension is required.
l E1 75-ohm unbalanced coaxial cable: BNC to BNC (The two connectors are BNC 75 angle male-II.)
l E1 120-ohm or T1 100-ohm balanced twisted pair cable: RJ45 to RJ45 (The two connectors are RJ45.)
If the E1 trunk cable extension is not used, the BNC connector is connected to the remote
device.
If the E1 trunk cable extension is used, the BNC connector is connected to a coaxial
connector, and the coaxial connector is connected to the remote device through the cable
extension, as shown in
CAUTION
The Tx end of the E1 trunk cable is connected to the Rx end of the remote device, and the
Rx end is connected to the Tx end.
Figure 6-15 E1 75-ohm unbalanced coaxial cable extension
connector
E1 75-ohm
unbalanced
coaxial cable
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Copyright © Huawei Technologies Co., Ltd.
X2 (RJ45)
4
5
1
2
Figure 6-15.
DB9
BNC
Coaxial
connector
Tip Color
White and orange
Orange
White and Blue
Blue
BNC
DDN
E1 75-ohm
cable extension
6 Cables
112