[Enum] How to correctly set up the request URI?

["Stastny Richard" <Richard.Stastny at oefeg.at>]

Folks,

Question for clarification:

In the discussions here on how to populate sip URI in Infrastructure 
ENUM to derive the Call Routing data for SPEERMINT  two
lines of thought exist:

The Enumservice SIP in Infrastructure ENUM should contain 
1. the address-of-record of the user: e.g. sip:+4319793321 at provB.net
2. the ingress point into the provider network:
e.g. sip:+4319793321 at sbc4711.provB.net

The originating UAC has in this case set the To: field to 
tel:+4319793321 and the Request-URI to e.g. 
sip:+4319793321provA.net;user=phone. This caused the
ENUM query at the proxy of provider A

The question is how the proxy of provider A is now
setting up the request URI in cases mentioned above?

Does the UAS from provider B accept calls to sbc7411.provB.net,
or must the request URI set to the proper AoR as described in
8.2.2.1 of RFC 3261? If yes, only option 1 is possible in ENUM.

I would also like to draw the attention to section 3 of
RFC3761 (SIP Enumservice) explaining the usage of AoR in
ENUM.

Regards

-sta


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