AASTRA 4225 for MX-ONE Telephony Switch - Manual (Page 11)

11 Dialog 4223 Professional/Dialog 4225 Vision
Description
6 Callback
Indicating/activating Callback. See section “
When you receive a busy
tone ” on page 40. The feature can be removed or moved to another
programmable function key by your system administrator.
7 Diversion (Follow-me)
Indicating/activating and deactivating Diversion (Follow-me). See
section “
Call Forwarding ” on page 62. The feature can be removed or
moved to another programmable function key by your system
administrator.
8 Programmable function keys
Program numbers or features. See section “
Programming of function
keys ” on page 98.
Note: The key marked with a “b” is also used to program a
melody, see section
“ Melody Ringing ” on page 109 .
9 Triple Access Line
Handle calls. Line 1 and 2 are available both for incoming and outgoing
calls. Inquiry can only be used for outgoing calls.
10 Microphone
Used for handsfree conversation.
11 Clear
Disconnect calls or exit a feature. Can always be pressed instead of
replacing the handset.
12 Headset key
Handle headset calls and activate Headset Preset. See section “
Headset
(optional) ” on page 118.
13 Loudspeaker on/off
a. Activate handsfree conversation. See section “
During Calls ” on
page 52.
b. Activate Loudspeaker Preset. See section “ Headset Preset ” on
page 119.
14 Mute
a
Switch the microphone on or off during a call. See section “ Mute ”
on page 53.
b Switch off the ring signal in idle mode or when ringing. See section
“
Mute ring signal ” on page 108 and “ Silent Ringing ” on page 108.
15 Volume control
Adjust the volume. See section “
Settings ” on page 98.
16 Loudspeaker