[Asterisk-Users] Cisco's description of echo

[Steve Underwood]

Rich Adamson wrote:

>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?

Regards,
Steve