[Asterisk-Users] Cisco's description of echo

[Rich Adamson]

> >One way is to buy a relatively inexpensive analog transmission test 
> >set ($400 US). Most have a tone generator and level meter built in.
> >You didn't mention which country you're located in, but ensure whatever
> >test set you purchase, that it supports the line impedance in use by
> >your telco.
> >
> >The inexpensive test sets won't function with digital circuits, however
> >by using something like a cisco ata186 (with a known rx & tx loss),
> >one can use the analog test set to measure almost anything going on
> >with asterisk and the pstn.
> >
> >Most US telco's have a milliwatt generator and quiet termination box
> >attached to some local telephone number. Many of the US telco's 
> >encourage their installation people to use the test sets to access those
> >resources for new pstn line installations to verify end to end functions.
> >Its usually fairly easy to obtain the telephone numbers assigned to
> >those boxes and use them to measure pstn loss, noise, etc.
> >
> >The Triplett Model 4 is one model. There are many others.
> >  
> >
> What's wrong with a little software for * to do all of the above and far 
> more without cost or inconvenience?

Absolutely nothing. Can you offer up something that is accurate and
usable?

(Might want to read through the mile long comments in bug 2023 though,
since that problem has never been addressed.)