[Asterisk-Users] Echo calibration with ztmonitor and a test line from a telco

[Matthew Boehm]

  > I have been doing a bit of this too lately.  This was also useful.
> 
> http://www.asteriskdocs.org/modules/tinycontent/content/docbook/current/docs-html/x1695.html
> 
> Dan

	What about for PRI lines? We get echo every now and then. The docs link 
above references FXO lines. We have none. But we do have 4 PRIs.

-Matthew