> Hi, I wonder which RFC defines the following escenario (AFAIK it's not
> feasible with RFC 4235):
>
> PSTN / SIP provider
> |
> |
> |
> |
> [ PBX / B2BUA ]
> / | \
> / | \
> [ phone A ] [ phone B ] [ phone C ]
>
>
> 1) The PBX receives a PSTN with callerid 12345.
> 2) The PBX performs some random algorithm or queue logic so "phone C"
> receives the INVITE.
> 3) phone A has a dialog subscription to any call from PSTN and
> captures the call.
>
> I can't imagine how to do the step 3. AFAIK RFC 4235 requires a
> subscription for an specific AoR, and I cannot know which will be that
> AoR since it depends on the PSTN phone calling. Thisis, the INVITE the
> PBX sends to phone C would be:
>
> INVITE sip:c...@ip_c SIP/2.0
> From: <sip:12...@domain>
>
> A "solution" would be phone A subscribing to dialog presence of both
> phone B and phone C, but this is not scalable (imagine 100 phones).
>
> What I mean is that every call capture solutions I've seen are based
> on subscription to an specific AoR, so when that AoR receives an
> INVITE we can capture it, but what I'm looking for is a subscription
> for non specific AoR, but for calls *from* a SIP device (in this case
> the PBX).
>
> How could I achieve it? any document/RFC?
>
>
>
[Simith] I'am guessing , if you have all your PBX extensions in your
Resource List document, and then
SUBSCRIBE to the Resource List SIP URI of the PBX, which
has all your extensions , won't you get the Presence of all your
extensions ?
similarly, For dialog events, probably you could include
the package - dialog.
Please see http://www.rfc-editor.org/rfc/rfc4826.txt ,
maybe this could help !
Cheers,
Simith
>
>
>
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