Avaya 4621SW 사용자 설명서

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 

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.