[SIPForum-discussion] 481 call leg/transaction does not exists

[Rohan Almeida]

Hi Raghul,

consider a scenario where
1> A sends Invite to B
2> B sends 200 OK to A. there is delay introduced by nw
3> A gets 200 OK just before its timeout
4> B has timedout for this transaction. and destroys this transaction
5> A sends ACK

A  - INVITE - > B
A <- 200 OK -   B
   (delay)
   (timeout)	
A  -  ACK    -> B

now since B has destroyed the transaction it will send 481  call
leg/transaction does not exists for the ACK message it sent in
response to a 200 OK.

regards,
Rohan Almeida

On 6/19/11, Raghul Prasanna <raghul82 at yahoo.co.uk> wrote:
> Hello all,
>
> Can a sip device receive 481 call leg/transaction does not exists for the
> ACK message it sent in response to a 200 OK? Please explain.
>
> Thanks,
> Raghul