Re: [Sip] Contact header for PSTN 2 IP call

[Dean Willis <dwillis@greycouncil.com>]

On Monday 23 December 2002 12:03 pm, Rinchen Tundup wrote:
> Hi,
> I have a question ! What will be the contact header in the sip
> message when an PSTN to IP call is made via a media gateway ? Since
> PSTN phone is not a SIP entity and cannot have a SIP URI.
> Should it be sip:phone_no@media_gateway_domain.com? or something
> else? pls help

Well, it generally is "whatever the media gateway wants it to be". I 
suspect it must satisfy two requirements -- it points at the gateway, 
and can be used by the gateway to identify the correct association.

The gateways I use at the office use sip:phone_no@hostname-o-fgateway or 
sip:phone_no@ip-address-of-gateway depending on which gateway and how 
it is configured.

--
Dean
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