Table 3-80
Specifications of the CPRI ports on the UBRI
Board
CPRI Port
Quantity
CPRI Port Data
Rate (Gbit/s)
Topology Type
UBRI
6
1.25/2.5
Star, chain, and ring
topologies
3.1.17 UELP
Each universal E1/T1 lightning protection unit (UELP) provides surge protection for four paths
of E1/T1 signals.
Panel
shows the panel of the UELP.
Figure 3-48
UELP panel
Ports
Table 3-81
Ports on the UELP
Silkscreen
Connector
Description
INSIDE
DB25 female connector
Connecting to a transmission
board of the base station
OUTSIDE
DB26 female connector
Connecting to an external
transmission device
DIP Switch
The UELP has one DIP switch, which is used to determine whether the receiving end is grounded.
The DIP switch has four DIP bits.
shows the DIP switch on the UELP.
BTS3900C (Ver.C)
Hardware Description
3 BTS3900C Modules
Issue 03 (2013-05-27)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
89