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
Figure 3-48 shows the panel of the UELP.
Figure 3-48 UELP panel
Ports
Table 3-81 lists the ports on the UELP.
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. Figure 3-49 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.
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