This scheme has no additional requirement for the PSN network, but the OLT must be deployed
with a BITS server (such as SYNLOCK from Huawei). Therefore, this scheme is recommended
when the upstream network of the OLT does not support 1588V2.
This scheme requires that ONU supports external clock interface. The model of the ONU
supporting this solution is MA5612 and MA5628.
Figure 14-5
"1PPS+ToD" time injection
PSN
N*E1
OLT
RNC
NodeB
eNodeB
ONU
RNC
CX600
GE/10GE
1pps+ToD
GPON line clock
FE/GE
GE
SYNLOCK
ONU
GPS
FE/GE
Prerequisite
l
The clock daughter board CKMC/CKMD of the SCU control board must be in position.
l
The CITD board (with the BITSB daughter board) must be in position.
l
The GPON service board must be GPBD.
Data Plan
Item
Data
Clock source
The time is injected from the BITS IN port of the CITD board to the
1PPS+ToD interface:
l
BITS IN ports of the CITD board: 0/0/0 and 0/0/1
l
Clock priority: p0 > p1
ETH port of the
ONU
0/3/1
Configuration Concept
1.
On the OLT side, select the 1PPS+ToD clock signal as the system clock source.
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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