FAQ_ANS Required_In Transmission netwrok, how much time needs to report LTI alarm ? Also, If the clock is in Hold over mode then how much time can it support ?

 

Thanks..... 

Dear Hasan, could you please tell me which exactly product you need to know? for example, OSN 3500, and so on. besides, could you please tell me where you find the clock support the Hold over mode?

Dear Tina, Thanks for enquiry and sorry for giving less information.
1. Yes, i want to know for OSN 3500.
2. As you may know, if external clock degraded then the clock switched to internal clock and my question was: If the clock is in Internal mode then how much time it can support ?

Dear Hasan,
thank you so much for your reply. For the OSN 3500, the holdover mode is 24h, and it's default value. For the alarm, i will remind another guy to reply you later.

how much time needs to report LTI alarm ?--------3 seconds

It's a very good question.....

@Tina.hu @y00132570 @Awal ...... Dear, Can you please clearify more regarding 3 Secs .....
Do u mean, LTI alarm will appear after 3 secs of clock changing from external to internal along with other clock alarm like, EXT_SYNC_LOS, CLK_NO_TRACE_MODE, S1_SYN_CHANGE?

LTI will be accompanied by CLK_NO_TRACE_MODE. if there is a priority table 0xf001/0xf002, and there is a physical fault, will also be reported EXT_SYNC_LOS at the same time. if the clock S1 quality becomes DNU, it will be reported to S1_SYN_CHANGE.

Thanks... y00132570

Dear, Is there any relationship between the LTI and SYNC_C_LOS alarms? ...Thanks in advance