## Disable/Enable Automatic Gain Control

Use the following procedure to turn automatic gain control for the handset, headset, and/or the Speaker on or off.

NOTE: The user can potentially override the AGC local procedure settings, as described in the telephone user guide. If overridden, the backup file stores the AGC value(s) set by the user and ignores any setting established using this local procedure.

1. While the telephone is on-hook and idle, press the following sequence of keys on the faceplate of the telephone:

Mute 2 4 2 # (Mute A G C #)

NOTE: Press the Mute button momentarily. Do not press this button while pressing other keys/buttons.

1. After entry of the command sequence, one of the following displays, based on the current value of the system value AGCHAND:

If AGCHAND = 1: | Handset AGC=on 0=off #=OK

If AGCHAND = 0: | Handset AGC=off 1=on #=OK

1. To change the AGC Handset value from On to Off, press 0. To change the AGC Handset value from Off to On, press 1.

If the telephone has a Headset interface one of the following displays, based on the current value of the system value AGCHEAD:

If AGCHEAD = 1: | Headset AGC=on 0=off #=OK

If AGCHEAD = 0: | Headset AGC=off 1=on #=OK

If the telephone does not have a headset interface, proceed to Step 5.

1. To change the AGC Headset value from On to Off, press 0. To change the AGC Headset value from Off to On, press 1.

One of the following displays, based on the current value of the system value AGCSPKR:

If AGCSPKR = 1: | Speaker AGC=on 0=off #=OK

If AGCSPKR = 0: | Speaker AGC=off 1=on #=OK

1. To change the AGC Speaker value from On to Off, press 0. To change the AGC Speaker value from Off to On, press 1.

If a value different from the current AGCHAND value and/or the current AGCHEAD value and/or the current AGCSPKR value is entered, the following text displays left-justified at the top of the display:

Save new value? *=no #=yes

1. Press the * button to terminate the procedure, or the # button to save the new value(s). If you press the # button, the telephone displays the following text:

New value being saved

The telephone saves the new value(s).