16 Sep
2005
16 Sep
'05
4:21 p.m.
hi,
i am facing the following situation.
UA1 calls a user(UA2) who does not answer. the control comes to
failure_route where i try another UA (UA3). but as UA3 rings, SER sends 408
Request timeout to UA1 and call gets disconnected.
this is the SIP message flow.
UA1 SER UA2
UA3
INVITE---------------->
INVITE-------------->
<----------------TRYING
<----------------RINGING
<------------------RINGING
CANCEL-------------->
<---------------------408
INVITE---------------------------------------->
<---------------------487
ACK------------------->
<-----------------------OK
<-------------------------------------------TRYING
<--------------------------------------------RINGING
(but UA already has got the busy tone) and does not hear this ringing.
if 408 was not sent to UA1, then the call could have been established.
what is going wrong,
regards,
tulika