Section 700 - Operation Chapter 5. Key Telephone FeaturesICX-40-700 ICX (International) issued December 1999 5-61ConsiderationsThe fixed MIC key works both for handset mute and microphone mute. But only VB-3411LDS, VB-D411LDS and VB-44225 key telephone have the fixed MIC key, so others must assign an FF key as aMIC key.Offhook MonitorDescriptionOffhook Monitor lets you put a call on speaker while the handset is offhook. You can stillcommunicate with the other party via the handset, but you will also be able to hear the other party onthe phone’s speaker. The other party can only hear what is transmitted through your handset however,because audio is not transmitted through your microphone.OperationTo put a call on speaker using the Offhook Monitor:Considerations• Offhook Monitor is available on VB-3411LDS, VB-D411LDS and VB-44225 key telephoneonly.• Offhook Monitor can be disabled system-wide.Offhook SignalingDescriptionOffhook Signaling sends a tone to a busy extension to indicate that another CO/Exchange line call hasarrived or a call is camped-on.Action Result1. During a handset call, press the ON/OFF key. • Other party is audible through speakerand handset• Phone’s microphone is mute2. To take a caller off speaker (disable Offhook Monitor) butcontinue the call via the handset, press the ON/OFF key.
