SIP Trunk Ring-back | Skype for Business

[mohkhalifa]

Dear All,
I'm using Mitel 3300 and Integrated with Skype for Business via SIP trunk. the problem I can't hear the RingBack tone from the headset.
Everything is working fine I can call Skype extension and also calling from Skype. the only problem not hearing the ringback tone.
ANY HELP!

[sunspark]

hello ,

what do you have in this two options  in you sip peer profile ?


 Enable Mitel Proprietary SDP
 Force sending SDP in initial Invite message

[mohkhalifa]

hello ,

what do you have in this two options  in you sip peer profile ?


 Enable Mitel Proprietary SDP
 Force sending SDP in initial Invite message

After enabling both of them, getting ERROR while dialing the extortion from the IP phone

[sunspark]

hello ,

what do you have in this two options  in you sip peer profile ?


 Enable Mitel Proprietary SDP
 Force sending SDP in initial Invite message

After enabling both of them, getting ERROR while dialing the extortion from the IP phone

This is not what i asked you.

[mohkhalifa]

hello ,

what do you have in this two options  in you sip peer profile ?


 Enable Mitel Proprietary SDP
 Force sending SDP in initial Invite message

After enabling both of them, getting ERROR while dialing the extortion from the IP phone

This is not what i asked you.

Both of them are (NO) disabled

[sunspark]

Set the second to yes, and test

[mark.vanderheijden]

You can also try to enable "Ignore SDP Answers in Provisional Responses" or "Suppress Use of SDP Inactive Media Streams"

[mohkhalifa]

NO LUCK!
I tried all of them and also no Ring-Back

[sunspark]

can you make a sip tcpdump ?