SIP version 1 (2543) used From header to identify the dialog so it's not recommended to change the From header to be backwards compatible (is there any RFC 2543 SIP endpoint around??...).
SIP Version 2 (RFC 3261) uses tags to identify dialogs so you should be able to change the FRom header except the tag.
Recently there was an RFC 4916 that specifies how to identify the connected identity and how to make a change in the From but I think this is far beyond what you are trying to achieve.
There are additional headers (Remote_PartyID, and related) that can be used to specify an identify of the calling party..
nice theory,
Sam.
2007/10/19, Iñaki Baz Castillo <ibc@in.ilimit.es
>:
El Friday 19 October 2007 16:04:47 Tobias Lindgren escribió:
> Hi,
>
> can I ask a question in regard to this thread. Is it valid according to
> standards to alter the From-header in a SIP INVITE?
Is it not a typical way to define callerid num in calls to PSTN gateway?
AFAIK is better using RPID header but...
--
Iñaki Baz Castillo
ibc@in.ilimit.es
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