Hi Andrés,

Isn't enough to change only the RURI and to let TO unchanged? If not, you can alter TO header but you have to be extremely careful not to broke transaction matching. The idea is, if you change TO in request (from To1 to To2), you have to catch the reply and to revert the TO value (from To2 to To1). So, a combination of reply_route() and subst() guess will do it.

Best regards, Marian

Andrés Parra L. wrote:

Dear Sirs:

I'm configuring a pre-paid scenario with a third party gateway. The GW guys gave me a GW number (a.k.a Username) and a password, so i'm able to place calls in the PSTN only if i am registered in my SIP Proxy with the username the GW guys gave me. The thing is that i want all my users to be able to use this channel to reach the PSTN. If I call this way (sip:01xxxxx@theirdomain.com) i succesfully reach the PSTN but when i call this other way (sip:01xxxxx@mydomain.com) their server returns a (403) Forbidden. I'm aware that this behavior is correct (due to domain verifications) but i need to know how could I, in my SIP Proxy, rewrite the "To: " field in order to write the correct domain when i place a call like this: (sip:01xxxxx@mydomain.com). I believe that if I reach a solution in this particular issue i would be able to let all my subscribers to use individualy a GW account.

If anyone can give me a clue of how could i reach a solution or any commets regarding this partucular issue, i would be really grateful.

Best regards.

Andrés Parra L. andresparra@ipsofactum.com Ipsofactum Ltd. www.ipsofactum.com

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