[Freeswitch-users] Strange media behavior on WebRTC

[Oleg Stolyar]

Hi guys,

I am connecting to FreeSWITCH using WebRTC and after a user calls in, I
play a beep and put them into a conference.  Two strange things happen
after that:

1. There is a noise in the user's leg that someone described like a wind in
the tunnel.  The noise lasts for several seconds, then the user can hear
the hold music.  The noise does not seem to happen if I don't play the beep
before the conference.

2. About 3 seconds into the call, there is another very short beep - like a
small portion of the original beep that the user hears.

This absolutely does not happen with softphones - only with WebRTC.  I
tried it with Chrome and Opera - same thing is happening on both.

I tried increasing the answer delay from 2 seconds to 3 and the noise now
happens more rarely but the extra beep is still there almost every time.  I
am using JsSIP 3.0 but since it only handles signalling I don't think the
problem is with the JS library.

Has anyone run into this?  Any advice?

Here is the relevant excerpt from my dialplan.

<condition field="destination_number" expression="^conf-(\S+)$">
        <action application="set" data="answer_delay=3000"/>
      <action application="answer"/>
        <action application="playback" data="tone_stream://%(1000,0,600)" />
        <action application="conference" data="$1 at default"/>
</condition>
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