Ericsson LBI-39110 - Manual (Page 23)

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after a preset time-out or can be removed from the
display by pressing . Call timer can be
refresh by pressing followed by .
Time of the last interconnect call will be
displayed.
4/EXT MIC (HANDSFREE)
The external mic (Handsfree) option routes
audio to an external Portable or Vehicle Handsfree
unit. To enable the external mic, press
followed by . Toggling this function provides
the user with the capability to have private
conversations or allow other passengers in the
vehicle to participate in the conversation (Vehicular
Option). The character display shows "INT MIC" if
the internal speaker/mic is currently active. To
toggle the state to the external speaker/mic press
key twice while the FCN icon is on. (NOTE:
With an external device connected the Allegra will
always “power-up” with the external unit enabled.)
5/SIMPLEX
When operating in the simplex mode, the
MUTE icon follows the state of the transmit audio.
While in simplex mode, PTT must be pressed prior
to speaking. (NOTE: Applicable only in the
interconnect mode.)
6/MUTE
This function enables the user to mute the
transmit audio when operating in the duplex mode.
To disable the microphone so the called party
cannot hear the conversation, press
followed by . MUTE is displayed.
Re-enable the microphone using the same key
press sequence. The call is muted only for the
duration of the current interconnect call.