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28th February 2008 at 14:50 #51050MicheleGuest
T200 which to Kassem refers supervises Ack on the LapDm (layer 2 protocol on the Um interface (MS-BTS)).
In this case BSC and core network are unaware of that and need to be advised by Error Indication message (from BTS to BSC) in such a way to release the call.
In case of T200 expiry on Abis interface, BSC is already informed and no ERRIND is necessary.29th February 2008 at 09:34 #51051PixGuest
Thanks michelle, I finally found this parameter in our dictionnary 🙂 there is a T200 for LapD management, and others T200 for LapDm management.
Supervision of acknowledgements for SDCCH SAPI 0. = 220ms
Supervision of acknowledgements for SDCCH SAPI 3. = 450ms
Supervision of acknowledgements on RSL for OMU SW. = 1sec
and so on ….29th February 2008 at 18:00 #51052pradhan. orissaGuest
tons f thanks 4 providing such valuable info2nd March 2008 at 12:03 #51053kassemGuest
Thank you so much pix/Michele2nd March 2008 at 17:53 #51054PixGuest
Since we’re all there : thank you one more time michelle 🙂9th April 2009 at 10:07 #51055ZiaGuest
In one case i am facing Handover failure, could any one tell me what is the best value for T200/ N200 to avoid Handover failure and call drops?29th May 2009 at 07:15 #51056vijayGuest
what is the meaning of SABM command, multiple frame established state? when this would come17th November 2009 at 12:30 #51057Faiq AhmadinGuest
anyone know how to set/change parameter BR9.0 MNTBMASK BIT30 & BIT31 to 0 ?
Faiq13th January 2010 at 14:37 #51058sergio.balutGuest
T200 expired problem14th January 2010 at 20:01 #51059sergio.balutGuest
TCH droprate problem13th May 2010 at 07:45 #51060aliGuest
Why TCH blocking occurs?14th May 2010 at 10:28 #51061AnshuGuest
Wrong half rate setting
Locked Ts or Trx26th March 2011 at 21:16 #51062wajahatGuest
Can anyone please guide that in which message inside Drive Test (done using TEMS) I can see T200 timer value?
As with other parameters that are available in Layer 3 Messages (System informations and Assignment commands) how can I find currently set value of T200 from Drive Test.27th March 2011 at 08:51 #51063pixGuest
you might find it in the LAYER-2 messages, not in the LAYER-3. Now, in which msg exactly, i don’t.
pix21st March 2013 at 09:38 #51064AdelGuest
Kindly support for the causes of call drop due to Release indication.