[Serusers] Help with subst

[Jed Stafford]

I may be going about this all the wrong way, but I am
attemping to change the INVITE string at the begining
of the session. In this example my XLite client is
connecting to SER which is then forwarding the call to
my PSTN gateway, however the INVITE string stays
written for the SER IP address.

Here is what I have thus far. The first line was just
a test which worked to modify the To: line. I assumed
it would also work with the INVITE, or am I going
about this all the wrong way?

subst('/^To:.*sip:([0-9]+)@.*$/To:<sip:\1 at 111.111.111.111>/');

subst('/^INVITE sip:([0-9]+)@.*$/INVITE
sip:\1 at 111.111.111.111/');

thanks,

-Jed