[SIPForum-discussion] Unknown User

[Broussard, Dan]

In the call flow you have below it will be the originating PSTN switch
that plays the "3 tone message"
 
Here are the reasons;
1. Only signaling was passed between the PSTN switch and IMS
2. No call was ever set up
3. These are prerecorded messages on PSTN switches.
 
Dan Broussard
Level 3 Communications

________________________________

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of gurudatt balaji
Sent: Wednesday, July 11, 2007 9:59 AM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] Unknown User


Hi All,
 
I've one query....
 
When PSTN user makes a call to IMS (unknown user), who is going to play
the announcement (saying wrong number/user) is it terminating switch
(IMS) or originating switch (PSTN switch)?
 
If it's PSTN, IMS will respond with 404-NON_FOUND and based on the
response PSTN will play with announcement
 
If it's IMS, how and what would be the logic?
 
Thanks in advance
 
Reg
Balaji
 
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