26 Jul
2005
26 Jul
'05
12:40 p.m.
It depends on the UAS. Do you use a certain UAS or are you developing one?
A bad, simple, dumb UAS will reject the second call/message.
An good, intelligent, smart UAS can deal with multiple calls and
multiple IM implementations. Thus, it will accept the MESSAGE,
regardless if it is session-model (INVITE-MESSAGE-MESSAGE-BYE) or
page-model (MESSAGE).
Thus, there is no right or wrong. It depends on how smart the UAS is,
and which IM models are supported by the UAS. Nevertheless, this is a
plain end-to-end problem and does not involve the SIP proxy.
regards,
klaus
Abhijit A.Mahajani wrote:
Hi!
Please see if my problem statement is clear from following or not?
Consider Windows Msgr specific case first:
UAC 1 has established a voice call with UAS through SIP Proxy.
UAC1---INVITE------>SIP Proxy------>UAS
SDP=Audio/Video
Now UAC1 wants to send IM to UAS
UAC1---MESSAGE------>SIP Proxy----->UAS
My Question is Now what should UAS do?
When seen in ethereal, we see INVITE again from UAC1 with SDP=x-ms-message.
If UAS supports SINGLE INVITE then, It ignores these INVITE and IM is not
processed.
Should UAS process the seocnd INVITE also?
Consider a case where Voice call is established other than Windows Msgr.
UAC1-----INVITE----->SIP proxy---->UAS
some other UAC e.g. UAC2 wnats to send IM to UAS (Not from Windows msgr)
UAC2-----MESSAGE--->SIP Proxy---->UAS
then Now this SIP IM is sent from Other UAC (Not from Windows msgr).Which
does not send INVITE with SDP=x-ms-message
It simply sends SIP MESSAGE.
Now here my question is Will UAS process this SIP MESSAGE?
Because Both Call ids are different .
Thanks and Regards.
Abhijit
----- Original Message -----
From: "Klaus Darilion" <klaus.mailinglists(a)pernau.at>
To: "Klaus Darilion" <klaus.mailinglists(a)pernau.at>
Cc: "Abhijit A.Mahajani" <abhijit_m(a)citilindia.com>om>; "ser
users"
<serusers(a)lists.iptel.org>
Sent: Tuesday, July 26, 2005 3:43 PM
Subject: Re: [Serusers] Queries regarding SIP IM
Klaus Darilion wrote:
Hi!
1. Please always Cc: to the mailing list - others might also be
interested in this topic and may help you.
You did. Sorry, my mistake.
klaus