MSC3635: Early Media for VoIP

[dbkr]

Rendered

Early media is essentially any media that is exchanged between the moment you start a call, to the moment the other side picks up (a connection is established). For instance, the ringing you hear while waiting for someone to pick up (called "ringback tones"), or the "busy" tone you hear when the line is busy. Those audio bits are known as "early media". Video can also fall into this category (though that's less common).

-- https://matrix.org/blog/2022/01/21/this-week-in-matrix-2022-01-21#random-msc-of-the-week

Preview: https://pr3635--matrix-org-previews.netlify.app

[simonwiedmer]

"The caller should ignore m.call.negotiate events before
of any other type before the m.call.answer."

I dont understand the meaning of this this sentence. Should it be callee? Does it refer to clients not having implemented this spec?

[dbkr]

I think there was just an extra word in there - the caller should be throwing away any negotiate events that come before an answer if they're not of type pranswer.