Re: [Linphone-users] linphone on iPad - RTP ok, but no outgoing sound on outgoing calls

[Rohit Gupta]

It most likely is a codec issue. When making an outgoing call, the ipad2 app is picking a codec that is not converting well to other supported on your Asterisk server or probably at the receiver end. You may want to narrow down the selected codecs to one or two and align it to similar selected in Asterisk sip settings and try.

I am not suspecting the nat since you mention that rtp traffic is seen in both directions in the logs, and the fact that voice is getting across but garbled and faint.

/Rohit

On Fri, Mar 23, 2018, 6:18 AM Marie Fischer <address@hidden> wrote:

No differences in sdp, using only a-law to rule out codec-related problems. (Log snippets attached)

Looking at wireshark capture taken on Asterisk, I have perfectly normal-looking RTP streams bothway - just no audio in the Linphone/iPad -> Asterisk direction for calls originating on Linphone/iPad .

  

-- 

marie

On 22.03.2018, at 23:38, Russell Treleaven <address@hidden> wrote:

Compare the spd between the working scenario and the non working. 

On Thu, Mar 22, 2018, 5:34 PM Marie Fischer <address@hidden> wrote:

No. Everything in the same LAN. (And as I wrote, it works when I use Linphone on my iPhone instead of iPad, keeping everything else the same.)

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marie

On 22.03.2018, at 21:44, Russell Treleaven <address@hidden> wrote:

Is there a stateful firewall between the uac and the uas?

On Thu, Mar 22, 2018, 1:01 PM Marie Fischer <address@hidden> wrote:

Hello everybody,

I am trying to setup Linphone iOS 3.16.5 on an iPad 2 (iOS 9.3.5) to connect to my Asterisk PBX.

Everything went quite smoothly, I can register, make and receive calls, but for outgoing calls the other party gets no sound. Strangely, I see correct RTP logs in Asterisk log (RTP streams coming & going both ways), it just seems there is no actual audio in the stream. Actually, the other party hears some static / white noise, which disappears if I press the mute button in Linphone.

Tested with both in-build microphone and Apple headset, no difference.

Incoming calls work correctly, i.e. have audio both ways.

The same setup works correctly on an iPhone 8 (iOS 11.2.6).

Linphone log file attached.


--
Thanks,

marie

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