Lets say any messages went in TCAP END for which I need not get any ACK back.
I really dono why a node will send any message in TCAP end!
Is it intentionally node is sending or happening due to some cause ?
TCAP is a very old technology, I am just making a guess -
In TC_END primitive user/component sublayer may want to pass any reject component, then the dialogue is ended. Though there can be many more scenario but not coming my mind.
Why P-CSCF node can not send message directly to S-CSCF ? What could be the reason behind it ?
I observed that S-CSCF node can send SIP messages to P-CSCF directly but why P-CSCF can not do towards the S-CSCF ?