Re: [Linphone-users] lastest update breaks dtmf on ios and android

I did a bit more testing and have more findings to share.

Until the latest update to the linphone mobile clients rfc-2833 and opus working as expected with freeswitch

ios Linphone iPhone 2.2.4.2-store-85-gbfcbadb

android Linphone 2.4.0

The simplest change to make rfc-2833 dtmf work again is to disable opus on linphone

Linphone is the uac and freeswitch is the uas in the described scenario

the relevant bits of the bad sdp exchange looks like this

invite

m=audio 7076 RTP/AVP 96 0 8 9 101 97

a=rtpmap:96 opus/48000/2

a=fmtp:96 useinbandfec=1; stereo=0; sprop-stereo=0

a=rtpmap:101 telephone-event/48000

a=rtpmap:97 telephone-event/8000

m=audio 16016 RTP/AVP 96 101

a=rtpmap:96 opus/48000/2

a=fmtp:96 useinbandfec=1

a=rtpmap:101 telephone-event/8000

a=fmtp:101 0-16

the relevant bits of good sdp exchange looks like this

invite

m=audio 7076 RTP/AVP 0 8 101

a=rtpmap:101 telephone-event/8000

m=audio 16008 RTP/AVP 0 101

a=rtpmap:0 PCMU/8000

a=rtpmap:101 telephone-event/8000

a=fmtp:101 0-16

Can you confirm that the last update to linphone changed your spd offer in regard to opus and dtmf?

Sincerely,

Russell Treleaven

On Tue, May 12, 2015 at 1:32 AM, Russell Treleaven <address@hidden> wrote:

Actually info is working, using it as a partial workaround for now.

On Mon, May 11, 2015 at 2:26 PM, Russell Treleaven <address@hidden> wrote:
Hi,

I am calling an ivr on
FreeSWITCH Version 1.5.15b+git~20141215T224714Z~0b414a8de8~64bit (git 0b414a8 2014-12-15 22:47:14Z 64bit)

Linphone was working as expected until I updated the apps to the latest release.
Acrobits, Bria and Zoiper all work as expected.
I have included a couple of sample invites and a small dialplan exerpt that demonstrates the problem.

The rtpmap for linphone has the sample rate set to 48000 which may be an issue.

On Mon, May 11, 2015 at 5:33 AM, Gautier Pelloux-Prayer <address@hidden> wrote:
Hi,

Testing it between:
- Linphone Android 2.4.0 and Linphone desktop (both SIP INFO + RFC2833): working fine.
- Linphone Android 2.4.0 and tier SIP provider (RFC2833): working fine.
- Linphone iphone 2.2.5-125 and Linphone desktop (both SIP INFO + RFC2833): working fine.

What's your setup?

Regards,

Gautier Pelloux-Prayer
Software Engineer @ Belledonne Communications

> On 08 May 2015, at 03:55, Russell Treleaven <address@hidden> wrote:
>
> Can someone please verify that the latest update to Android and IOS linphone applications breaks DTMF. Neither info or rfc-2833 seem to work.
>
> versions tested
> ios Linphone iPhone 2.2.4.2-store-85-gbfcbadb
> android Linphone 2.4.0
>
> Sincerely
>
> Russell Treleaven

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> Linphone-users mailing list
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From:	Russell Treleaven
Subject:	Re: [Linphone-users] lastest update breaks dtmf on ios and android
Date:	Tue, 12 May 2015 13:10:10 -0400