[asterisk-users] ztmonitor displays full bar when idle

[Tzafrir Cohen]

On Fri, Dec 15, 2006 at 06:41:58PM -0800, Yuan LIU wrote:
> Hardware is an SM56 card (X100P clone).  When the line hangs up, ztmonitor 
> displays full bar (or whatever maximum allowed by rxgain) in RX.  It only 
> drops zero when the line picks up (and remote was silent).  Is this 
> something of concern?  The zap channel seems to work despite echo.

When the line is on-hook, its contents is meaningless.

> 
> Additionally, what's the objective of tuning with ztmonitor?  I mean, what 
> would indicate an optimal level? (Because display of ztmonitor depends on 
> the volume of the remote speaker - I'm using demo sounds from another 
> Asterisk, how do I tell?)  Documents I see only mentioned RX, should I be 
> concerned about TX?  What's a good indicator of an optimal txgain?

Its main added value is a clear separation between the transmit and
recieve channel: you can actually see the echo. But it's basically a
rather low-level tool and you should use the raw information it provides
you wisely. It's no silver bullet.

-- 
               Tzafrir Cohen       
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