T200 Expire

[electron]

Hi all,


Some time T200 will be expire.Somebody please answer the questions:

1.Explain me about this timer?
2.Reason of T200 expire?
3.what will happen after expire in network?
4.How we can solve the problem?



Regards//

[mayank_shah]

1.Explain me about this timer?
2.Reason of T200 expire?
3.what will happen after expire in network? - Call Drop increases
4.How we can solve the problem? - Change HO Margin

[ghassen]

Hi all,


Some time T200 will be expire.Somebody please answer the questions:

1.Explain me about this timer?
2.Reason of T200 expire?
3.what will happen after expire in network?
4.How we can solve the problem?



Regards//

This attribute contains values for the LapDm Timer 200, to be used on the different
control channels.
Default values:
sdcchSAPI0 220ms
facchTCHF 155ms
facchTCHH 205ms
sacchTCHSAPI0 900ms
sacchSDCCH 900ms
sdcchSAPI3 450ms
sacchTCHSAPI3 1350ms

- T200 is expired N200+1 times before a i-frame is received ==> when expire we have link down ( L2 error )

[alibushehri]

The Timer T200 a Maximum time the LAPDm (Layer-2) transmitter will wait for an acknowledgment before making a retransmission.
So the cause is obvious as it is says there is a protocol error or the reason for a release on the radio link layer(LAPDm).
I also have to say that we have T200 on LAPD Interface and the definition is the same.

[ghassen]

The Timer T200 a Maximum time the LAPDm (Layer-2) transmitter will wait for an acknowledgment before making a retransmission.
So the cause is obvious as it is says there is a protocol error or the reason for a release on the radio link layer(LAPDm).
I also have to say that we have T200 on LAPD Interface and the definition is the same.

you have detailed my answer so thx

[electron]

The Timer T200 a Maximum time the LAPDm (Layer-2) transmitter will wait for an acknowledgment before making a retransmission.
So the cause is obvious as it is says there is a protocol error or the reason for a release on the radio link layer(LAPDm).
I also have to say that we have T200 on LAPD Interface and the definition is the same.

Salam Ali jan,


Thanks for your complete answer(Mer30 Mohandes)

BR///

[adriansyah]

try to help :

T : Timer
N : Repitition.

Please see the attachment

[hassen]

try to help :

T : Timer
N : Repitition.

Please see the attachment

hi
thank you good report
do you have the same about synchronization because i face a problem of Ho and
i suspect a bad synchronisation between bscs that cause fail on intercell ho.

Br Hassen

[RF engineer]

hi
thank you good report
do you have the same about synchronization because i face a problem of Ho and
i suspect a bad synchronisation between bscs that cause fail on intercell ho.

Br Hassen

Hi
Did you check BTS clock may be the problem is there not transmission
BR
RF

[RANGSM]

Maybe the problem is because you have extended cell active...

I have the same problem..but in E///