4.Press [0], [1] for ON or [0], [0] for OFF.

5.Press [MUTE].

6.A short ring will be heard to signal successful programming.

NOTE: The default value is ON for all 4 lines.

ADJUSTING VOLUME LEVELS

Adjusting Ringer Volume

There are 3 levels of volume adjustment (low, middle, and high) for the ringer.

1.Press the [VOLUME] key (beneath the dial keys) up or down when receiving a call or when the phone is idle.

NOTE: The default level is the middle level.

Adjusting Speakerphone Volume

1.Press the [SPKR] key.

2.Press the [VOLUME] key up or down to the desired volume level.

NOTE: The default level is the 12th (out of 16) level. A short ring will be heard when the volume is set at the maximum or minimum level.

Adjusting Handset and Headset Volume

There are 3 volume levels (low, middle, high). As the handset or headset is in use, adjust the volume by pressing the [VOLUME] key up or down to the desired volume level.

NOTE: The default level is the low level. A short ring will be heard when the volume is set at the maximum or minimum level.

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IBM 412CID, 4900 installation and operation guide Adjusting Volume Levels, Adjusting Ringer Volume