Hi,
Today I want to share some useful procedures help you in maintenance works .
1- Disable automatic VC-4 loop release
Usually we need to make loops in VC-4 level while doing maintenance , as the loop is one of the most important tool for locating faults .
But loop in high level signal is dangerous as it may lead to service cut for a large mount of small services inside the VC-4 , also if you make loop toward the remote side in the first VC-4 in STM-1/STM-4/STM-16/STM64 in linear network this will also loop the DCC bytes and therefore you will not be able to release the loop using local management , and then you will need either to have DCN management access to the remote NE or to go locally to the NE and release the loop .
As a provision Huawei U2000 default setting is based on automatic release to the loop after definite time (5-minutes). ( automatic loop release function)
But we sometimes need to have long time check especially while acceptance tests , commissioning or error source locating , so we sometimes need to disable the automatic loop release function , and to do that you should follow these steps .
In U2000
Configuration > NE Batch Configuration >> Automatic Disabling of NE Function
In NCE
Configuration > Auto NE Function Disabling
This menu has a lot of loop types to be managed just as appear in the screen shot
U2000
NCE
U2000
2- Showing SDH trail of services created within the same NE
- (FOR EXAMPLE VC-12 ) As known the VC-12 SDH Trail appears only if the VC-12 is created with in the VC4 Server Trail , and VC4 Server Trail can be created between NEs and can not be created within the same NE .So how to create and show VC-12 SDH Trail between ports in the same NE , for example from 1- SLT1-1 port to 1- SLT1-6 port ?
First – the only ways for creation VC-12 services within the same NE is using manual Cross-connection or command line but not using Trail .
Then – to show the Trail after creation you need to make Trail search
In U2000
Service>SDH Trail >> Search for SDH Trail
In NCE
Service>SDH Trail >> Search for SDH Trail
The service created with in the same NE will not appear in the discovered service but in discrete services , so you just need to get to the discrete services from
In U2000
Service>SDH Trail >> Manage SDH Discrete services
In NCE
Service>SDH Trail >> Manage SDH Discrete services
U2000
Then make filter based on the NE and board , after that just right click on the discrete service and choose
( Convert to MONO Nodal Trail ) , then the VC-12 Trail will change to be complete Trail .
U2000
I hope to be useful to you
Regards
