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The 4620/4620SW/4621SW IP Telephone
Issue 3 April 2006 15
11 Headset With a headset connected, changes audio control from the
handset or Speaker to the headset.
12 Mute LED
Indicator
Lights steadily when the handset, headset or Speaker is
muted.
13 Mute Turns off the active Speaker, handset, or headset
microphone, to prevent the other person from hearing you.
14 Volume Control Adjusts the handset, Speaker, headset, or ringer volume,
depending on which item is in use. When you increase or
decrease the volume, the top display area shows an icon to
indicate the item for which you are adjusting the volume. A
visual “volume meter” that shows the volume level follows the
icon. This button also controls the volume of the key click
sounds. Key clicks sound when you press fixed buttons on the
phone such as the dialpad or softkeys.
15 Headset Jack Provides a port for connecting a headset on the underside of
the phone.
16 Hold Red button used to place a call on hold.
17 Transfer Transfers a call to another phone.
18 Conference Sets up conference calls with more than one other person.
19 Drop Drops the last person added to a Conference call or ends the
current call, if you are not on a Conference call.
20 Redial Redials the last number dialed from the phone or displays a
list of the last six numbers dialed for selection. Set using the
Options button described in Chapter 6: 4620/4620SW/
4621SW IP Telephone Options.
21 Numeric (Dialing)
Pad
Standard 12 button pad for dialing phone numbers.
22 Feature Key
Expansion Unit
Connection Jack
Provides a port (on the underside of the phone) for connecting
the optional EU24/EU24BL (Feature Key Expansion Unit),
which provides additional telephone Feature buttons.
Table 1: 4620/4620SW/4621SW IP Telephone Button/Feature Descriptions (continued)
Callout
Number
Button/Feature
Name
Button/Feature
Description
2 of 2