The LTI alarm indicates that the clock source is lost. This alarm is reported when all external clock sources in the clock priority table are unavailable and the equipment clock works in holdover or free-run mode.

The SYNC_C_LOS alarm indicates that a clock source in the clock priority table is lost. This alarm is reported when the logic status of an external clock source is null.

Relationship: The LTI alarm is reported when all external clock sources in the clock priority table report the SYNC_C_LOS alarm.

Please dont forget if you have any other query ....Enjoy !!

Thanks ( Mr.Debobroto and m80005923 ) for sharing your question and knowledge. Hope everyone will feel free to ask any question here.....

Dear all, Can you please let me know about Cables for connecting external clock sources ?

Dear user_2789637, Thanks for questioning. I will ask another guy to reply.

ok. I am waiting....

@ user_2789637
The 75 ohm clock source is connected with an electrical cable. The 120 ohm clock source is connected with a network cable. One network cable supports a maximum of two external clock signals.
For the OptiX OSN1500/2500/3500/7500: The external clock cable is connected to the AUX, EOW, or PIU board.
For the OptiX OSN7500II: The external clock cable is connected to the cross-connect board.

@ m80005923 , Thanks for sharing with us .....

@m80005923 , Hasan_Rafi
Thanks for your answer .....

Why we need to configure clock as i dont have any relation with service ?

@user_2789637 ....

Why we need to configure clock as i dont have any relation with service ?

We need to ensure deviation between the transmit clock rate and the receive clock rate within a proper range to ensure the correct transmission and processing of data. Beside, it may leads pointer justification which can trigger Bit Error.