AASTRA 4224 Operator for MX-ONE User Guide - Manual (Page 12)

Description
Dialog 4224 Operator 12
15 Speech left key / Speech right key
Speech left
To talk to the source party.
Speech right
To talk to the destination party.
16 Microphone
Not used.
17 Answer/Extend
To answer and extend incoming line calls. The key is also used to
start automatic ring signal and to put a call on hold.
18 Headset key
To switch from handset to headset. The key lamp shows steady
light when calls are connected to the headset. See section
“ Accessories ” on page 88.
Note: Headset is optional.
19 Announce
To initiate extending with announcement or Camp On to busy
extension or external line.
20 Mute
During a call: To switch the microphone on or off.
In idle mode or when ringing: To switch off the ring signal.
21 Volume control
To change the volume.
22 Loudspeaker for ring signal
23 Handset
Supplied with hearing aid function as standard.
Please note: The handset may attract and retain small
metal objects in the earcap region.