[Freeswitch-users] Freeswitch and Ping

Michael Jerris mike at jerris.com
Thu Apr 21 06:52:30 MSD 2016

sounds like a broken router to me

On Wednesday, April 20, 2016, Clive Lansink <clive at lansink.co.nz> wrote:

> Hi everyone. I often use Freeswitch set up as a client to provide a soft
> phone on my laptop.
> But recently I noticed a significant problem when at the same time I was
> running a standard Windows "ping" in the background. The speech I heard
> from the other end would often stutter, and the remote party complained
> that my speech sometimes sounded gittery.
> I reasoned that ping doesn't take up much network bandwidth so while in
> conversation I did something like copy a large file from my laptop to
> another PC on the network and there was no disturbance to the conversation.
> It only seems to be ping that causes this.
> Is there something about pinging that might impact on Freeswitch or VOIP?
> What would cause this?
> Further information.
> the above refers to the standard Windows ping command. I also have a
> Python script that pings a specified host, and running it also caused the
> call quality to degrade. I tried various changes to the source code to no
> effect, including:
> * only creating the socket once and then reusing it instead of it being
> created for each ping.
> * Only creating the data packet once and reusing it instead of it being
> created for each ping.
> * Using a very short packet size.
> * Eliminating the select statement and just sleeping for a period of time
> before reading the response in case the select itself was at fault.
> * Eliminating the step of dissecting and decoding the received packet.
> None of these made any difference so it seems to me that whatever it is
> must be something quite fundamental to something at the lower networking
> level.
> Thank you.
> Clive Lansink
> Email: Clive at Lansink.Co.NZ <javascript:;>
> Phone: +64 9 520-4242
> Mobile: +64 21 663-999
> Fax: +64 21 789-150
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