[Asterisk-Users] Ztmonitor values when zap channel is onhook

[Eric Wieling aka ManxPower]

VaibhaV Sharma wrote:
> Hello,
> In my quest to figure out the source of the random echo on our shiny new
> asterisk install, I have been using ztmonitor on the TDM400p channels
> for the good part of today.
> 
> I have 2 TDM400p cards with 8 FXO modules and 6 pots lines connected to
> them (last 2 channels are unused but configured in zaptel). Even when
> the lines are onhook, the Tx values settle down to 0 but the Rx values
> still jump up and down. For some lines the values vary around 440, for
> others around 250 and for one of the unused FXO ports, its around 97 all
> the time.
> 
> With txgain/rxgain set to 0.0, call volumes were considerably low.
> Hence, I have txgain set to 1.0 and rxgain set to 6.0.

why not txgain=-6 to start out with?