Trace 183 Ringing

asked 2017-12-18 01:41:48 +0000

This post is a wiki. Anyone with karma >750 is welcome to improve it.

How to troubleshoot no ring back on outgoing sip calls

answered 2017-12-18 09:33:49 +0000

Jaap

13742 ●710 ●115

Have a look at media negotiation (through SDP) in this phase of the call. Early media can be there, to provide far end ring back tone. Or if it's not there, it should be generated locally by your terminal.

edit flag offensive delete link

Comments

But the calling UA (terminal) should generate the alert confirmation tone to the calling user only if the called either sends a 180 with no SDP in it or if the SDP negotiation could not be completed because the INVITE contained no SDP and so the one in 180 is an offer and 100rel is not supported in that dialog.

If conditions for early media are met (SDPs exchanged, no SDP-less 180 seen), the remote party is responsible for providing the tone.

sindy ( 2017-12-18 11:04:13 +0000 )edit

add a comment

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Trace 183 Ringing

1 Answer

Comments

Your Answer

Question Tools

Stats

Related questions

Trace 183 Ringing edit

1 Answer

Comments

Your Answer

Question Tools

Stats

Related questions

Trace 183 Ringing