Result
After the configuration of base station access service is complete, use the test meter to perform
tests on the E1/ETH access port of the ONU and the upstream GE/10GE port. The long-term bit
error ratio (BER) and delay should be able to meet the requirements for actual applications.
14.3.3 Configuring E1/STM-1 Line Clock Synchronization
When optical line terminals (OLTs) access a base station that requires only frequency
synchronization, such as GSM/WCDMA, and when OLTs are connected upstream to the
synchronous digital hierarchy (SDH) network by using the E1/STM-1 port, the E1/STM-1 line
clock can be used for clock synchronization.
Application Context
As shown in Figure 14-3, the OLT recovers the clock from the E1/STM-1 line. This clock is
transmitted by the BSC/RNC through the SDH network and then transmitted to the ONU through
the PON line clock. After recovering the clock, the ONU transmits the clock to the base station
through the E1 line.
Figure 14-3 E1/STM-1 line clock synchronization
SDH
N*E1
BTS
OLT
BSC
NodeB
N*E1
ONU
RNC
CX600
E1/STM-1
E1/STM-1 line clock
PON line clock
ONU
Prerequisite
The clock daughter board CKMC/CKMD of the SCU board must be in position.
SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Commissioning and Configuration Guide
14 FTTM Configuration (Base Station Access)
Issue 01 (2014-04-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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