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Dear Sir...
I am Um TaeHwan in South-Korea.
And, I am implementing the SIP-T between MGC(Media Gateway
Controller) supporting VoATM.
May I question of you?
I don't know the following message flow is
possible.
Originating-MGC
Terminating-MGC
INVITE
---------------------->
100 Trying(INVITE)
<-----------------------
INFO
<----------------------
200 OK(INFO)
---------------------->
200 OK(INVITE)
<----------------------
While INVITE-transaction is alive, the T-MGC must respond 18X
status message(recommended? )
But, O-MGC can send INFO method while the INVITE-transaction
is alive.
The question is "T-MGC can send INFO method while
INVITE-transaction is alive?"
Please let me know it.
Sincerely yours.
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