Re: TCP dial via proxy

David,

We had this exact "issue" in the past and were not able to figure out how
to do it. Where we wanted tcp we prefixed the sip URI with "force_tcp". So:
Dial(SIP/[email protected]//2.2.2.2)
became:
Dial(SIP/[email protected]//2.2.2.2)
On Kamailio's side in the FORWARD block we added:
# HACK for forcing TCP
                if ($oU != $null && $(oU{s.len}) != 0) {
                    $var(prefix) = $(oU{s.substr,0,9});
                    if ($var(prefix) == "force_tcp") {
                        $rU = $(oU{s.substr,9,0});
                        add_uri_param( "transport=tcp" );
                        $fs = "tcp:" + $Ri + ":5060";
                    }
                }



On Wed, Jul 20, 2022 at 10:47 PM David Cunningham <[email protected]>
wrote:

> Hello,
>
> We have an Asterisk dial which sends the call via a proxy using //, for
> example:
>
> Dial(SIP/${EXTEN}@peer_address//proxy_address)
>
> Does anyone know how we can make the SIP to the proxy use TCP? We tried
> making proxy_address match a peer in sip.conf with "transport = tcp" but
> that didn't seem to work. We are using chan_sip.
>
> Thanks very much for any advice.
>
> --
> David Cunningham, Voisonics Limited
> http://voisonics.com/
> USA: +1 213 221 1092
> New Zealand: +64 (0)28 2558 3782
> --
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