[Freeswitch-users] iPhone (AMR) to PSTN (G.711) silent call issue - dropped

[Vlad Toma]

Did you try to disable VAD?

On Wed, Feb 27, 2019, 6:02 PM Stefano Bertuola <stefano.bertuola at gmail.com>
wrote:

> Hi experts.
>
> I am using FS for transcoding a call between an iPhone (AMR codec used) to
> a Cisco 880 Voice simulating PSTN (a legacy phone is connected here).
>
> A call is initiated by iPhone and terminated to the fixed phone; if the B
> side is silent (VAD enabled), the Cisco 880 stops sending RTP towards FS
> and, then, FS to iPhone.
>
> After 10sec not receiving RTPs, iPhone drops the call with "Reason:
> SIP;cause=200;text="RTP Timeout" ".
>
> I tried several options to make the FS not stopping sending RTPs towards
> iPhone or any other possibility to avoid this issue, but I was not able to
> get a workaround.
>
> Any idea?
>
> Br. Stefano
>
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