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The functional version of the OSN3500 EXCSA single board isN1.the EXCSA single board supports functions and features such as service scheduling, clock input and output, and so on.The single board consists of a cross-connection unit, a clock unit, and so on.There are single board indicators and bar codes on the panel.It can be inserted in the slot 9 and 10 of the subrack.parameters can be configured through the T2000 network management system.Metrics include cross-connect capability, clock access capability, single board size, weight and power consumption.
Clock loss caused by non-uniform settings of SSM clock protocols across the network. This problem can be solved by standardizing the clock protocol across the network.
OptiX Products
OptiX OSN 3500
Failure category
- Other
- OOL
- SYN_BAD
Phenomenon Description
The OOL alarm occurs at irregular intervals, and the last time this alarm occurred, an EXCSA master/standby reversal occurred. This device provides the master clock source for other devices in the network.
The cross-board EXCSA reports the OOL, SYN_BAD, and S1_SYN_CHANGE alarms.The OOL alarm indicates that the line clock of the incoming signal is not being tracked and is locked by the CDR phase-locked loop. The crossboard synchronization source is lost and the synchronization alarm appears.
Cause Analysis
The device generating the alarm enabled the standard SSM protocol, while other devices in the network enabled the extended SSM protocol, resulting in the input clock signal not being tracked and a synchronization alarm appearing.
Steps to be taken
- Modify the clock subnet configuration to enable the extended SSM protocol, and the alarm disappears.
Reference Information
None.
The technical information in this chapter and the related SDH equipment troubleshooting procedures are provided by Shenzhen Optical Transmission Network Technology Co. Huawei SDH optical transmission equipment, SDH transmission equipment sales phone: 13430988088 Welcome to call!
