Hi Jaya,
Retransmission of a request is forced until a ACK is received. To
acknowledge provisional responses the PRACK method is used.
The scenario is for example
Example: "My IP telephony application won't work if 180 ringing response is
lost"
Terminologies Used in PRACK
183 Session in Progress
R-Sequence
C-Sequence
User agents are therefore set to re-transmit these until a PRACK is
returned.
This is the traditional scenario:
This is the PRACK Scenario
Regards,
Bharat M. Sarvan
PUNE.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jayalakshmi
Bhat
Sent: Monday, November 07, 2005 3:25 PM
To: [email protected]
Subject: [Sip-implementors] PRACK method
Hi all ,
Please can any one explain me when PRACK method is used?
Thanks in advance,
Jaya,
#########################################################
THIS EMAIL MESSAGE IS FOR THE SOLE USE OF THE INTENDED
RECIPIENT(S) AND MAY CONTAIN CONFIDENTIAL AND PRIVILEGED
INFORMATION. ANY UNAUTHORIZED REVIEW, USE, DISCLOSURE OR
DISTRIBUTION IS PROHIBITED.BEFORE OPENING ANY ATTACHMENTS
PLEASE CHECK FOR VIRUSES AND DEFECTS.IF YOU ARE NOT THE
INTENDED RECIPIENT, PLEASE NOTIFY US IMMEDIATELY BY REPLY
E-MAIL AND DELETE THE ORIGINAL MESSAGE.
##########################################################
_______________________________________________
Sip-implementors mailing list
[email protected]
http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
