5.6.5 Cable Between Two FE Optical Ports
The cable between two FE optical ports connects the GTMU and the WMPT to implement IP
transmission.
5.6.1 E1/T1 Cable
The E1/T1 cable connects the BBU to the external transmission device and transmits baseband
signals.
Exterior
The E1/T1 cables are classified into two types: 75-ohm E1 coaxial cable and 120-ohm E1 twisted
pair cable.
One end of the E1/T1 cable is a DB26 male connector. The connector at the other end of the
cable should be made on site according to site requirements. Figure 5-101 shows an E1/T1 cable.
Figure 5-101 E1/T1 cable
(1) DB26 male connector
Table 5-69 describes the connectors of the 75-ohm E1 coaxial cable.
Table 5-69 Connectors of the 75-ohm E1 coaxial cable
Cable
One End The other End
75-ohm E1 coaxial cable DB26 male connector L9 male connector
L9 female connector
SMB female connector
BNC male connector
SMZ male connector
SMZ female connector
Pin Assignment
Table 5-70 and Table 5-71 describe the pin assignment for the wires of the E1/T1 cable.
BTS3900
Hardware Description 5 BTS3900 Cables
Issue 04 (2011-02-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5-75
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