- This topic has 7 replies, 1 voice, and was last updated 8 months ago by antonio.
8th November 2009 at 06:43 #59522alexGuest
i am new in gsm.
i have an alarm on my bsc that clears calls on A interface or Abis interface.
this alarm changes its state (between cancelling an enabling)almost
every 1 second.
my vendor is nokia.
the following alarm:
2992 BTS AND TC UNSYNCHRONIZATION CLEAR CALLS ON A(or Abis) INTERFACE.
plese somone help me to fix this alarm.9th November 2009 at 05:07 #59523BijoyGuest
For 2992,check for cic mismatch between TC and A-interface.
For 2993,check for configuration mismatch between OMC and BTS Manager9th November 2009 at 18:12 #59524alexGuest
thanx for your reply.
by i sead that i am new in gsm.
please explain for me with detail.
actually you believe that this alarm fix with correct the Definitions between TC and A (or Abis)interface(software solution)?
or i have to fix it with check my hardware(TRX,COMBINER,…)?
meanwhile i had 7745 and 7743 alarm on my bts that have alarm 2993.
plaese explain me with details.
thanx10th November 2009 at 08:12 #59525BijoyGuest
7745 & 7743 mostly comes along with 2993 because call failure rate will be too high for that TRX.
In Ultrasite BTS Hub Manager,check for TRX bypassing configuration & Cross connection.Also check for incorrect E1 TS bypassing.2993 never comes for any type of H/W fault,it comes only due to configuration mismatch between Site(BTS HUB Manager) & OMC configuration.
The supplementary info in 2993 alarm will tell you the culprit BTS, TRX & PCM on which it is configured10th November 2009 at 10:46 #59526alexGuest
but what about 2992?11th November 2009 at 05:53 #59527BijoyGuest
For 2992,check whether all circuits of CGR are created in MSC end also.One way to check is whether the CIC’s indicated in 2992 is created/faulty/blocked on the A-interface also.You can get the CIC & PCM info from the supplementary field2nd October 2012 at 15:06 #59528sachinGuest
How we can overcome this 2992 alarm and can identify . Can we identify the CIC mismatch or configitaional issue !26th February 2020 at 20:26 #71506antonioGuest
I need to know what class alarm means:
(39800) 7789 NO (E)GPRS TRANSACTIONS IN BTS