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@default"/>

</condition>