C o n f i g u r a t i o n 4-55Set Echo CancellationDefault Setting for AllPorts1 Type “1” on the Echo Cancellation Default Settings Configuration Menu(Figure 4.51) to enable or disable echo cancellation for all ports.2 Type “E” to enable echo cancellation for all ports, or “D” to disable it. TheIAD saves the mode you’ve selected and redisplays the Echo CancellationDefault Settings Configuration menu.3 Press Escape to continue with other voice path configuration.Displaying CurrentEcho CancellationDefault SettingsTo display the Current Echo Cancellation default settings, follow the stepsbelow.1 Type “2” on the Echo Cancellation Default Settings Configuration Menu(Figure 4.51) to display the echo cancellation setting on each port. The IADlists each port and whether echo cancellation is enabled or disabled.2 Press any key to return to the Echo Cancellation Default SettingsConfiguration menu.Configure EchoCancellation DefaultSetting per PortTo configure the Echo Cancellation default setting per port, follow the stepsbelow.1 Type “3” on the Echo Cancellation Default Settings Configuration menu(Figure 4.51) to enable or disable echo cancellation for a specific port. TheIAD prompts you to choose a line or port.2 Type the port number to set. The IAD prompts you to enable or disable echocancellation for that port.3 Type “E” to enable echo cancellation, or “D” to disable it. The IAD savesthe mode you’ve selected and redisplays the Echo Cancellation DefaultSettings Configuration menu.4 Press Escape to continue with other voice path configuration.Set Loop GainWhen a country mode is selected, default loop gain values for that country areassigned to the IAD. If the IAD feeds telephone circuits into a legacy PBX orother equipment that defines transmit and receive levels to the network, theloop gain value must match the value of the circuit it supplies. The levels aredetermined and set by the PBX or terminating equipment manufacturer.Adjusting the loop gain on the IAD can also compensate for telephonevolume’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 (Figure4.27) to display the Configure Loop Gain menu (Figure 4.52).
