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Turning Off the Backlight
Issue 6 February 2007 73
Turning Off the Backlight
This procedure applies only to 4600 Series IP Telephones with a display.
1. While the telephone is on-hook and idle, press the following sequence of keys on the
faceplate of the telephone:
Mute 6 3 3 # (Mute O F F #)
Note:
Note: Press the Mute button momentarily. Do not press this button while pressing other
keys/buttons. The 4630 and 4630SW IP Telephones and the 4690 IP Conference
Telephone do not have a dedicated Hold button. For all other 4600 Series IP
Telephones, pressing the Hold button instead of the Mute button also works.
The display backlight of the telephone (and any attached EU24BL button module) goes off
immediately and the user interface is restored to its previous state.
QoS Option Setting
Use the following procedure to set Quality of Service (QoS) options.
Note:
Note: The 4601 IP Telephone does not support QoS Option Setting.
1. While the telephone is on-hook and idle, press the following sequence of keys on the
faceplate of the telephone:
Mute 7 6 7 # (Mute Q O S #)
Note:
Note: Press the Mute button momentarily. Do not press this button while pressing other
keys/buttons. The 4630 and 4630SW IP Telephones and the 4690 IP Conference
Telephone do not have a dedicated Hold button. For all other 4600 Series IP
Telephones, pressing the Hold button instead of the Mute button also works.
The following text displays left-justified at the top of the display:
where d is the value of the 802.1 audio parameter.
L2 audio=d
New=_