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OSN2500 transmission equipment and SONET equipment docking failure, after checking found that you must use all N2 series optical interface boards, and use 3 * AU3 level configuration through the service, in order to ensure successful docking.
OptiX OSN 2500
Failure Category
Device Docking Failure
Phenomenon Description
On the STM-16 rate multiplexing segment protection ring composed of OptiX OSN 2500 devices, N2SLQ1 single boards are added at two of the sites, and one STM-1 optical port is added at each site to realize docking with SONET devices, and VC-4 level is used to configure pass-through services throughout the whole process. The test of OSN equipment and SONET equipment are normal, but as soon as they are docked, the corresponding ports on both sides of the equipment report AIS, and the service is not available.
Cause Analysis
As can be seen from the pending table test, OSN equipment and SONET equipment are normal, the problem should be in the docking above, you need to confirm whether the overhead of OSN equipment and SONET equipment is the same, OSN equipment docking SONET in the function of whether there are limitations in the support, or whether you need to carry out special configuration.
Operation steps
- Check that there is no problem with the SDH service configuration, that the N2 series of single boards can adapt to docking with SONET, and that overhead bytes such as S1 are transmitted.
- Check the other SDH boards, and find that in the network, except for the N2 series of optical interface boards for docking, the line side of the N1 series of optical interface boards, after confirming that all must use the N2 series of optical interface boards.
- Replace them all with N2 series optical interface boards (N2SL16, N2SLQ1), and use VC-4 level to configure pass-through service, but the service is still not available.
- Check the opening guidebook, and find that the level of N2 series optical interface board service configuration has increased by 3*AU3. After confirming that, the docking SONET equipment needs to use 3*AU3 level to configure the pass-through service, and VC-4 level cannot be used.
- After using the 3*AU3 level to configure the pass-through service, the service is normal and the docking with SONET equipment is successful.
Reference Information
- All line boards need to use N2 series optical interface boards, such as N2SL64, N2SL16, N2SLQ1 and other single boards, and Q2SL16, Q2SL4 and other single boards cannot be used.
- The 3*AU3 level needs to be used to configure pass-through services, and the VC-4 level cannot be used.
The technical information in this chapter and the related SDH equipment troubleshooting procedures are provided by Shenzhen Optical Transmission Network Technology Company Limited (www.opticaltrans.com), and are reproduced with permission. Huawei SDH optical transmission equipment, SDH transmission equipment sales phone: 13430988088 Welcome to call!
