OSN 3500 SL16A Single Board Functional Feature Description

The functional versions of the Optix OSN 3500 SSN3SL16A single board are N1, N2, and N3, among which the N1SL16A and N2SL16A single boards have been discontinued.There is no substitution relationship between the N1 and N2 versions.The N3SL16A supports the function of single-board compatibility substitution: the N3SL16A can completely replace the N1SL16A.When the AU-3 service is not configured, the N3SL16A can completely replace the N2SL16A. N3SL16A can completely replace N2SL16A. after replacement, the configuration and service status of the N3SL16A veneer remain the same as that of N2SL16A or N1SL16A before replacement. If the working board is an N2SL16A or N3SL16A with only the TCM function enabled, the protection board is not allowed to be an N1SL16A. otherwise the inversion will cause service interruption. If the working board is the N2SL16A configured with AU-3 services only, the protection board is not allowed to be the N1SL16A or N3SL16A, or the inversion will cause service interruption. the N3SL16A supports the U-16.2Je plus SSN1BA2 and SSN1BPA optical power amplifier boards that can be combined to achieve a transmission distance of 170 km, which is a Huawei customized standard. the U-16.2Je is compatible with the U-16.2. it supports U-16.2. Compatible with U-16.2, supports the use and monitoring of SFP pluggable optical modules, and facilitates the maintenance and upgrade of optical modules. Supports VC-12, VC-3, and VC-4 services as well as VC-4-4c, VC-4-8c, and VC-4-16c cascade services. Supports segment overhead processing of STM-16 signals.

Problem description:A customer has built a new project, using SL16 single board with BA2 to realize long-distance transmission, but found that the BA2 single boards in several locations report IN_PWR_HIGH alarm, and queried that the luminosity of SL16 single board is around 5. Check the SL16 single board manufacturing information, for the SSN3SL1606 single board, optical interface type for V-16.2Je, without BA should be -2 ~ 3. BA2 single board receiving light indicators for -6 ~ 3, theoretically should not be reported to the police.

Alarm message:IN_PWR_HIGH

Processing

1. query the single board 15M and 24H performance, found that the basic stability in about 5, no big jumps, reset the performance of the query remains the same, reset the single board and then query also remains stable, to rule out the possibility of light module light jump.

2. The present network configuration scenario has a lot of bureau points, all involved in this case, to rule out the possibility of failure of the single board, suspect that the batch of problems caused by the module or the index has been adjusted.

3. Consult the module's R & D, confirmed that SSN3SL16 (V16.2JE) using the old optical module light is -2 ~ 3, with the BA light amplifier to achieve light 13 ~ 15dBm specifications, and the optical module dispersion tolerance to support the 2800ps / nm. However, due to the use of the optical module is a 30pin half-brick sealing the turn of the optical module, this optical module has been discontinued, the alternative optical module is the SFP package small optical module, in order to be able to use the SFP package small optical module, the optical module, the optical module is a small optical module. Encapsulated small optical module, in order to replace the old single board specifications, dispersion tolerance to support more than 140KM, so find a light-emitting is 3~7dBm, dispersion tolerance support 170KM optical module to replace. (The rest of the light-emitting small optical module dispersion tolerance do not meet the requirements), so the new V16.2JE light-emitting is 3 ~ 7dBm, to be stronger than the BA range of light received, in conjunction with the use of BA plus 5dB attenuation to adapt.

4. 5db attenuation is added to the in port of BA2, the alarm of BA2 single board disappears, and the service opens normally.

Root cause

1. SL16 single-board module failure leads to high luminosity

2.SL16 single-board module indicators have changed, but the document has not been updated.

Suggestions and Summary

Product documentation in order to maintain consistency with the previous, V16.2JE module indicators will not be refreshed, the subsequent will be reflected in the offer inside the piece, in the use of similar scenarios when configuring the default will be issued 5db attenuator, the subsequent encounter of similar problems can be referred to the case to explain to the user.

This chapter of technical information and related SDH equipment troubleshooting process provided by Shenzhen Optical Transmission Network Technology Co. Huawei SDH optical transmission equipment, SDH transmission equipment sales phone: 13430988088 Welcome to telephone consultation!