>Where does the 4 wire change to a 2 wire? with just a x100p that would be at the telco in their switching gear where they do the a/d to route the call but if you have a channel bank withn T1 to * then you have the a/d at the telco switch and then again more a/d when coming off channel banks fxo to T1 inerface in *
you can also get echo because of a an impedance mismatch between the analog line trunk from the telco and the x100p (eg tip/ring reversed, incorrectly provisioning on the analog line) so much for theory ..:) Now i have questions 1) how do you actually measure the impedance that is provisioned on the line ?? 2) what impedance does the x100 expect ?? _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
