[Asterisk-Users] Calibrating both RX and TX gain?

[Mojo with Horan & Company, LLC]

Hello :)

> For example, once I have the rxgain calibrated for all of the lines, 
> could I then call into, say, Zap/3 from Zap/4 and run Milliwatt() on 
> Zap/3 and use ztmonitor on Zap/4 to calibrate it?  I'm sure it's not 
> perfect, but would it be close enough?
That's exactly what you do.  Once I had adjusted my rxgains to calibrate 
them to the signal that the phoneco gave me, I just dialed out of one 
line and into another.  Everything's supposedly digital on the phoneco 
side, so no loss should occur.  (because with the rxgains you've already 
compensated for what will happen on the inbound trip through the 
copper).  So by then adjusting your txgains on each channel, you can 
feel confident that the phoneco is accurately representing to you how 
you sound from its point of view.

> A second question:  doesn't it seem wrong that my rxgain and txgain are 
> so far off when I'm just talking to a channel bank 12 feet away?  I sure 
> don't have cable loss.  It sure seems like the impedance is way off or 
> something.  Is there a way to test this further, rather than just 
> cranking up the gain?  My guess is that using the milliwatt line will 
> just tell me to make the rxgain higher, which will probably just make 
> the echo issues worse...
It does seem like something else is wrong.  You shouldn't require such 
high rxgains in my opinion, but I have no idea what could be causing 
this need.

Mojo