[OpenSIPS-Users] - Not sending ACK back!

[Nitesh Divecha]

Hello All,

I have been scratching my head for a few days now... Just to recap:

I'm a newbie with OpenSIPS so bear with me... I got OpenSIPS 3.3.1
(residential) running on Debian 11 with OpenSIPS Control Panel 9.3.2 and
MySQL.

My goal is to:
1) Make two ATA's register and call each other (locally)... *Stopped
working, I think routing logic is missing.*
2) Make ATA to call PSTN via an outbound SIP trunk or DID provider... *No
ACK sent to Outbound provider.*
3) Receive inbound calls from PSTN or SIP trunk and forward it to
registered ATA... *Getting rejected.*
4) Able to send and receive faxes from and to PSTN... *Haven't even
touched.*

Fast forward... I did achieve a few of my goals but they stopped working...
You fix one thing and you break others...

My current issue is OpenSIPS is not sending ACK back to the Outbound
provider when I make calls to PSTN thus calls are getting dropped from the
Outbound provider due to no ACK. This issue started when I implemented
topology_hiding('C"), rtpproxy_offer("ro"), uac_replace_from( ,
"$avp(furi)").

Here is my code snippet:

####### Routing Logic ########


# main request routing logic


route{


#if ($rU=~"^\+[1-9][0-9]+$") {

        if (dp_translate(10 ,$rU ,$rU) ) {

                xlog("*** 2. Dial plan translate from source $avp(src) to
$rU ***\n");


                $avp(furi) = "sip:aaabbbcccc at gothamcity.com";

                uac_replace_from( , "$avp(furi)");

                #strip(1);

                if (!do_routing(0)) {

                        send_reply(500,"No PSTN Route found");

                        exit;

                }

                # t_on_branch("change_from");

                route(relay);

                exit;

        }



route[relay] {

        xlog("*** 3. Entering route relay ***\n");

        # for INVITEs enable some additional helper routes

        if (is_method("INVITE")) {

                topology_hiding("C");

                if(remove_hf("User-Agent")){

                        xlog("*** 4. User-Agent found and removed. ***\n");

                }


                if (isflagset("NAT") && has_body("application/sdp")) {

                        rtpproxy_offer("ro");

                        #rtpproxy_offer();

                }


                t_on_branch("per_branch_ops");

                t_on_reply("handle_nat");

                t_on_failure("missed_call");

        }


        if (isflagset("NAT")) {

                add_rr_param(";nat=yes");

        }


        if (!t_relay()) {

                send_reply(500,"Internal Error");

        }

        exit;

}

Any thoughts or suggestions on what to check for ACK?

Cheers,
Nitesh
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