Christian,
You were correct in the assumption in brackets against the 'Redirect when not logged in' in my experience, if a proxy which is the registrar for a UA has no registration for this user it will call process this immediately as for a no answer event. Then treatment depends on the service and provisioning of this user - Recorded Voice Announcement 'User unavailable' or Call Forward to Voice Mail, or Call Forward to another number etc..
If the UA was registered but not available 'turned off' then the Proxy Registrar would Invite the UA but this would subsequently fail and invoke the same no answer treatment as outlined above.
Redirection of FAX messages - now there is a concept. In talking about a general UA - I am thinking a phone user ? - same process as above with the UA being currently registered etc. If the UA is registered and available the Invite would be recieved by the UA but the SDP would be incompatable eg. the phone end point is not capable of receiving a FAX message and would return a 415 'Unsupported Media Type' or similar termination code. I have not tried this scenario out and ao can't say with 100% what you would get. I am not aware of an intelligence in the proxy or UA that could redirect the incoming call to a FAX.... although that would be nifty.
Regards,
Wayne Davies
System Support Engineer - Broadsoft
Office: +61 3 96260468
Mobile: 0417282909
email: [EMAIL PROTECTED]
| "Christian Stredicke" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED] 11/03/2004 10:49 PM
|
To: <[EMAIL PROTECTED]> cc: Subject: [Sip-implementors] Controlling Redirection |
Sorry if that's a stupid question.
On my cell phone I can set the redirection for the following cases:
- Redirect always
- Redirect when not logged in (in SIP that would correspondent to not registered)
- Redirect when not answering after x seconds
- Redirect Fax messages (?)
- Other cases?
3xx is no solution (if the UA is switched off it can't answer). I guess the proxy or registrar would have to handle this. How would a SIP user agent tell the proxy or registrar this? Do we already have an RFC or is there something going on in a working group?
Christian
--
Christian Stredicke
tel:+49.30.39833.401 (ENUM & PSTN)
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