[Freeswitch-users] Effect of sync_clock on calls?

[Peter Olsson]

I'm not really sure. But I guess there could be a short gap in audio. 5ms I'm not sure you would even notice. FS probably handles it quite well :)

/Peter

________________________________
Från: freeswitch-users-bounces at lists.freeswitch.org [freeswitch-users-bounces at lists.freeswitch.org] för Michael Giagnocavo [mgg at giagnocavo.net]
Skickat: den 13 januari 2012 17:21
Till: FreeSWITCH Users Help
Ämne: Re: [Freeswitch-users] Effect of sync_clock on calls?

Yea, I found the one that waits until after it finishes calls. What would the actual effect be on a call? Suppose my clock has drifted 5ms and I sync; would that make timers expire sooner/later and cause an audio distortion?

From: freeswitch-users-bounces at lists.freeswitch.org [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Anthony Minessale
Sent: Friday, January 13, 2012 8:32 AM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Effect of sync_clock on calls?


I forgot the command but yes. It's an extra arg to the existing sync clock.
Again I don't think this even happens on win unless you ask it to.
On Jan 13, 2012 9:09 AM, "Peter Olsson" <peter.olsson at visionutveckling.se<mailto:peter.olsson at visionutveckling.se>> wrote:
I think in later FS versions (git head) the actual sync is not done until there are no calls. Either that is the case, or there was a new fsctl command added to handle this.

Anthm, I think you implemented this a few weeks ago?

/Peter


Från: freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org> [mailto:freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org>] För Brian Foster
Skickat: den 13 januari 2012 15:36
Till: FreeSWITCH Users Help
Ämne: Re: [Freeswitch-users] Effect of sync_clock on calls?

Hola,

http://wiki.freeswitch.org/wiki/Clock

The general concensus says that you really should not be messing around too much with using sync_clock. If you still plan to go down this road, I suggest only syncing the clock when there are no calls. Syncing the clock could cause some issues if you are doing this when there are calls up.

-BD

On Fri, Jan 13, 2012 at 9:22 AM, Michael Giagnocavo <mgg at giagnocavo.net<mailto:mgg at giagnocavo.net>> wrote:
Should there be any audio-quality effects on calls by running fsctl sync_clock? To try to get my timestamps as close as possible to system time, I plan on running this every 5 minutes or so. Is there a fundamental issue with this?

Or is there a way to disable the monotonic clock completely? I understand what it’s trying to achieve, but I cannot see how it’ll ever be any more accurate than the system time, which is sync’d via NTP. I’m more concerned about my timestamps being accurate than protecting against someone turning off NTP and changing the time to some invalid value.

-Michael

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