Verilink 8100A (34-00237) Product Manual - Manual (Page 157)

C o n f i g u r a t i o n 4-83
Configure Echo
Cancellation Default
Setting per Port
To configure the Echo Cancellation default setting per port, follow the steps
below.
1 Type “3” on the Echo Cancellation Default Settings Configuration menu
(Figure 4.97) to enable or disable echo cancellation for a specific port. The
IAD prompts you to choose a line or port.
2 Type the port number to set. The IAD prompts you to enable or disable echo
cancellation for that port.
3 Type “E” to enable echo cancellation, or “D” to disable it. The IAD saves
the mode you’ve selected and redisplays the Echo Cancellation Default
Settings Configuration menu.
4 Press Escape to continue with other voice path configuration.
Set Loop Gain
When a country mode is selected, default loop gain values for that country are
assigned to the IAD. If the IAD feeds telephone circuits into a legacy PBX or
other equipment that defines transmit and receive levels to the network, the
loop gain value must match the value of the circuit it supplies. The levels are
determined and set by the PBX or terminating equipment manufacturer.
Adjusting the loop gain on the IAD can also compensate for telephone
volume’s being too loud or too soft.
NOTICE: Loop gain values should be set only by your Network Administrator.
To set loop gain values, type “G” on the Voice Configuration menu (Figure
4.70) to display the Configure Loop Gain menu (Figure 4.98).
Figure 4.98 Configure Loop Gain Menu
Each of the options on this menu is described in detail below.
Set Loop Gain for All
Ports
To set the Transmit (
−9 to 3 dB − default −2 dB) and Receive (−9 to 3 dB −
default
−4 dB) Loop Gain values for all ports, follow the steps below.
1 Type “1” on the Configure Loop Gain menu (Figure 4.98) to select Set
Loop Gain for all ports. The IAD prompts you to enter the Transmit Loop
Gain for all ports.
2 Type the value (include a dash for negative values) and press Enter. The
IAD displays prompts you to enter the Receive Loop Gain for all ports.