Hi,
could you help me ragarding the question marked with asterixes in
attached file where call flow scenario is described. The questions are
from MGCF point of view.
1st (*) Is it allowed to receive any SDP in 183 reliable provisional
response as described? shouldn't the call be released immediately
when this situation ocurres no matter what kind of sdp is received?
2.nd (**) Is it allowed to to receive sdp answer in 200_OK to initial
invite as described? should the call be released when this occures also?
Thanks for any answer,
best regards,
D.
SIP MGCF SIP
! INVITE(SDP1) ! !
!-------------------->! !
! ! INVITE(SDP2) !
! !------------------->!
! ! !
! 183(SDP1a) ! !
!<--------------------! !
! !183(SDP2a)codec_lock!
! !<-------------------!
! 183 ! !
!<--------------------! !
! ! PRACK(SDP3) !
! !------------------->!
! ! !
! ! 200_OK_PRACK(SDP3a)!
! !<-------------------!
! ! !
! ! 183(SDPXX)* !
! !<-------------------!
! ! !
! ! PRACK !
! !------------------->!
! ! !
! ! 200_OK_PRACK !
! !<-------------------!
! ! !
! ! !
! !200_OK_INV(SDP3a)** !
! !<-------------------!
! ! !
! ! !
! ! ACK !
!200_OK_INVITE(SDP1a) !------------------->!
!<------------------- ! !
! ! !
! ACK ! !
!-------------------->! !
! ! !
! CONNECTED !
!---------------------!--------------------!
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