Hello Daniel,
     Thank you for the reply. I'm quite new to the sip world, and not sure how to change the config file. The pstn part of the config file is as follows:
   #!ifdef WITH_PSTN
        if (strempty($sel(cfg_get.pstn.gw_ip))) {
                xlog("SCRIPT: PSTN routing enabled but pstn.gw_ip not defined\n");
                return;
        }
        if(!($rU=~"^(\+|00)[1-9][0-9]{3,20}$")) return;

        if(from_uri!=myself && src_ip!=104.199.152.250) {
                sl_send_reply("403", "Not Allowed haha");
                exit;
        }

        if (strempty($sel(cfg_get.pstn.gw_port))) {
                $ru = "sip:" + $rU + "@" + $sel(cfg_get.pstn.gw_ip);
        } else {
                $ru = "sip:" + $rU + "@" + $sel(cfg_get.pstn.gw_ip) + ":"
                                        + $sel(cfg_get.pstn.gw_port);
        }

        route(RELAY);
        exit;
#!endif

Can you help me do the modification? Thank you.

Cheers,
Jesse

At 2017-06-06 15:36:22, "Daniel-Constantin Mierla" <miconda@gmail.com> wrote:

Hello,

if you set r-uri to a UDP address, then you can just use t_relay(), and everything needed should be done by kamailio. Be sure you do record_route()/loose_route(), so the requests within dialog are also routed properly.

Cheers,
Daniel


On 06.06.17 08:50, ÕÔ¹ú½Ü wrote:
Hi everyone,
     I have a kamailio server with TLS enabled. I need to forword UAC request to a PSTN gateway which only support UDP. Is it possible that kamailio can translate this with proper configuration? How can i do this?

many thanks
Jesse


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