Description of the problem

OSN3500 SSN3SL16 single board is used with SSN1BA2 to realize long-distance transmission, but it is found that BA2 single boards in several localities report IN_PWR_HIGH alarm, and the luminous emission of SL16 single board is around 5 when queried. Check the SL16 single board manufacturing information, for the SSN3SL1606 single board, optical interface type for V-16.2Je, without adding BA should be -2 ~ 3. BA2 single board light indicators for -6 ~ 3, theoretically, should not be reported to the police.

Alarm information

IN_PWR_HIGH

Processing

1. Query the single-board 15M and 24H performance, found that the basic stability of about 5, no big jump, reset the performance of the query remains the same, reset the single-board query after the query also remains stable, to rule out the possibility of light-emitting optical module 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 a small optical module of the SFP package, in order to replace the SFP package, the optical module is a small optical module, the SFP package is a small optical module, in order to be able to replace the 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. SSN3SL16 single-board module failure leads to high luminosity

2.SSN3SL1606 single-board module indicators have changed, but the document has not been updated

Suggestions and summaries

Product documentation in order to maintain consistency with the previous, V16.2 JE 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 of explaining to the user.

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