I’m working with Asterisk and have a scenario where I need a single client to register and use two different transport types—WebRTC (over WSS) and SIP over UDP—under the same extension. My goal is for both transport types to be available simultaneously, so the client can register from both a browser (WebRTC) and a softphone (e.g., MicroSIP) using the same extension number.
People often use “extension” to mean “endpoint”, but you can have two protocols sharing the same extension, e.g. Dial(PJSIP/endpoint1&PJSIP/endpoint2&DAHDI/3)