Providing the below SGX services is not free; if you find them useful please consider supporting infrastructure costs on Liberapay, on Patreon, or by becoming a paying customer of JMP.

Run the register command on cheogram.com and enter gateway twilio.sgx.soprani.ca or chat with xmpp:cheogram.com bot and say register twilio.sgx.soprani.ca

Source: https://github.com/pesvut/sgx-twilio

Inbound Calls

1. In Twilio, go to Develop > Explore Products > Elastic SIP Trunking and create a new trunk with any name.

2. In your new trunk go to Origination settings

3. Add a SIP URI: sip:user%5C40domain.tld%40cheogram.com@sip.cheogram.com (replace user with your Jabber ID localpart and domain.tld with your Jabber ID domainpart)

4. In the left panel under your trunk go to Numbers

5. Top-right Add a number > Add an existing number and choose your number

Incoming calls to that number will now ring you on Jingle.

Outbound Calls

1. In Twilio, go to Develop > Explore Products > Functions

2. Make a new function with any name, use this code:

   • exports.handler = function(context, event, callback) {
       let twiml = new Twilio.twiml.VoiceResponse();
       if(event.From != "SIP URI FROM INBOUND SECTION ABOVE") {
         console.log("Bad from: " + event.From);
         twiml.hangup();
       } else {
         let tel = event.To.split("@")[0].replace(/^sip:/, "");
         twiml.dial({ callerId: "YOUR TWILIO NUMBER" }).number(tel);
       }
     
       return callback(null, twiml);
     };

3. Save and "Deploy all" -- make a note of the function's domain name

4. In Twilio, go to Develop > Explore Products > Voice

5. In the sidebar under Manage pick SIP domains

6. Make a domain with any name. Use an IP access control list with the IP 192.99.233.116

7. Set "A call comes in" webhook to https://<function domain>/<function path>

8. Save
9. Open Gajim or another client that support XML console and sent this XML in the console:

   • <iq to="cheogram.com" type="set">
             <command xmlns="http://jabber.org/protocol/commands" node="sip-proxy-set">
                     <x xmlns="jabber:x:data">
                             <field var="sip-proxy">
                                     <value>YOUR TWILIO SIP DOMAIN</value>
                             </field>
                     </x>
             </command>
     </iq>

10. Disconnect and reconnect your Jabber account, you should now be able to place voice calls via Cheogram