[Asterisk-Users] Fine Tuning

[Steven Critchfield]

On Tue, 2004-12-07 at 12:55 -0500, Peter Osborne wrote:
> On Tuesday 07 December 2004 12:34, Steven Critchfield wrote:
> > On Tue, 2004-12-07 at 11:00 -0500, Peter Osborne wrote:
> > > Hello all,
> > >
> > > We've been using our Asterisk system live for about a month now and I'm
> > > looking to tuning a few things. First, is echo, I receive a fair amount
> > > of echo during the first 10-15 seconds of incoming calls.
> > >
> > > Next is a very weird problem. We have serveral Polycom IP300's and one
> > > Budgetone phone. It seems that if we unplug & move the Budgetone (which
> > > happens a fair amount as it is the phone we move to normally unreachable
> > > areas, some of the Polycoms will no longer work properly, the caller can
> > > hear us but we can't hear them. Very odd that the Budgetone triggers this
> > > but it is fairly consistent so we're close to just ditching the
> > > Budgetone.
> > >
> > > Sound quality, when the volume is maxed on our Polycom phones, the sound
> > > is jittery and you can here what sounds like some sort of artifacts from
> > > compression or something like that, in some of the worst cases you can
> > > even hear random little beeps in the background.
> > >
> > > Finally, all incoming calls seem to be a touch quite, basically the
> > > volume is always maxed on our Polycoms, is there a simple way to increase
> > > the incoming volume of all calls?
> > >
> > > If anyone can help or point me in the right direction on these, it would
> > > be much appreciated. I have gone through the wiki and not found much on
> > > these issues.
> >
> > Care to mention what PSTN hardware you are using?
> 
> I'm using a Digium TDM400, 4 FXO's but we actually only have 3 incoming lines, 
> we don't have any VOIP carriers, we only use IP internally.

I belive the trick here is to use ztmonitor to determine how to adjust
the gain values on your interfaces and it will bring your volumes up.
Echo may be reduced as the echo portion will be at a lower volume than
the intended audio.
-- 
Steven Critchfield <critch at basesys.com>