Hi! The caller presentation is a widly used service in the PSTN network, and ofcource IP telephony users will want to have the same service even if they are calling from the IP world to the PSTN. Yes, the gateway will have some numberseries, and also each user of the IP telephony network will have its own phonenumber, so that they can be reach from the PSTN. We don't want to present the gateway number to the called party, but the actual number where the caller can be reached.
We are developing a gateway and I am interested in how others have solved this problem. Regards Maria -----Original Message----- From: James Undery [mailto:[EMAIL PROTECTED]] Sent: Thursday, December 19, 2002 2:44 PM To: Maria Yndefors Subject: RE: [Sip-implementors] phone number to be contacted at This is exactly the complexity I means, in reality a SIP UA won't have a phone number and the callee will see the gateway as the caller-id. Unless you've got gateway controlling a range of number and a proxy the otherside handling the location within that range you wouldn't be able to call from the PSTN. The otherway round you'd need an extension on the gateway so that you could tell it which of its numbers to use. (You'd have to see gateway vendors about this if it exists.) James > -----Original Message----- > From: Maria Yndefors [mailto:[EMAIL PROTECTED]] > Sent: 19 December 2002 13:33 > To: James Undery; Sip-Implementors > Subject: RE: [Sip-implementors] phone number to be contacted at > > > Hi! > Thanks for answering, the thing is that the useragent might > not put its > phonenumber in the From, it will perhaps put maria@e-horizon, and not > [EMAIL PROTECTED], otherwise other IP phone also will > have call > [EMAIL PROTECTED] when they call back to > [EMAIL PROTECTED], why > should a IP phone have to use the phonenumber when it could > just use the > more simpler [EMAIL PROTECTED], So what I'm looking for is > some alternate > From field, to put the phonenumber in. > > /Maria > > > -----Original Message----- > From: James Undery [mailto:[EMAIL PROTECTED]] > Sent: Thursday, December 19, 2002 2:15 PM > To: Maria Yndefors; Sip-Implementors > Subject: RE: [Sip-implementors] phone number to be contacted at > > > Hi, > > I guess no one answered as you've more or less answered it > your self, the > From header would be used if anything was (if it was a tel uri or > equivalent). As you can probably guess though this is far > more complex than > that as the gateway is likely to present it's own number due > to regulations > about tracability and the possibility for spoofing. > > James > > -----Original Message----- > From: Maria Yndefors [mailto:[EMAIL PROTECTED]] > Sent: 19 December 2002 13:05 > To: Sip-Implementors > Subject: [Sip-implementors] phone number to be contacted at > > > Hi! > I have asked similar question before but I did not get an > answer so I will > try again. > > When an useragent calls through a gateway out to the PSTN it > will send a sip > address with user@host in the From header field (the same > address it used to > register itslef with), What header field could be used if the > UA would like > to send its phonenumber, so that it can be displayed to the > called party. > > Thanks and Regards > Maria > > _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
