[Asterisk-Users] Re: Horrible MeetMe performance

[Peter Svensson]

On Sun, 26 Jun 2005, qrss wrote:

> It seems
> that the voip clock is slightly faster than the hardware clock that zaptel
> is timing from.  The extra samples/second must be being buffered.  Of
> course, this buffering would add up over time until the point that a VOIP
> sample is played back several seconds out of phase.  Seems that either the
> zaptel clock source must be brought to closer tolerance, or the extra data
> that is being buffered must be thrown away in order to stay in sync. Any
> thoughts?

The VoIP clocks are not synchronized to the PSTN, to each other or to a
common reference. There is bound to be a frequency difference between
several devices. Over time this will lead to dropped packages. At present
Asterisk MeetMe does not drop superflous samples, instead choosing to
queue them.

See bug http://bugs.digium.com/view.php?id=4252.

Peter