Hello,
Yes, actually my call flow for outbound calls is, Kamailio => Asterisk => Kamailio (route(PSTN)). SIP trunk is available at Kamailio server.
So, when final outbound INVITE goes to the SIP trunk provider it expects a particular Contact header IP, instead of Asterisk server IP.

On Mon, Aug 1, 2022 at 10:20 PM Alex Balashov <abalashov@evaristesys.com> wrote:
Before you do this, I would ask yourself why you’re doing this, and whether it’s a good idea from a technical point of view.

> On Aug 1, 2022, at 8:36 AM, Ankit Jayswal <ankit.jayswal@engagely.ai> wrote:
>
> Hello Team,
>
> I am in need to modify the contact header in Kamailio before sending an INVITE request to the SIP trunk provider. Basically the IP address I need to modify in the contact header. Please suggest a better way to do this. Below is an example.
>
> OLD (Existing):
> Contact: <sip:009169240xxx@45.118.162.x:5080;alias=10.52.26.102~5080~1>
>
> NEW (Needed):
> Contact: <sip:00912269240xxx@10.52.26.98:5060>
>
> I tried various functions from the textops module but no hope.
> I am looking for a function that can replace the contact header's value. Please help me with this.
>
> --
> Thanks & Regards,
> Ankit Jayswal | Specialist - Software Development
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--
Alex Balashov | Principal | Evariste Systems LLC

Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/


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