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4
Functional Operation
4.1
Function of Talk with Management Center
4.1.1 Call Management Center
Press SOS key on the front panel in any status, and the VTH switches to call Management
Center at once.
If calls get through, VTH sends out beep sound, which is ringback tone.
In case of failure, press SOS key on the front panel to finish calling.
4.1.2 Call from Management Center
When Management Center calls VTH, VTH rings. Press
“Call Key” on the front panel to pick up
the call and talk with each other. Press
“Call Key” again to hang up.
4.2
Function of Talk with VTO
When VTO calls VTH, VTH rings. Press
“Call Key” on the front panel to pick up the call and talk
with each other. Press
“Call Key” again to hang up.
4.3
Unlock Function
During talk with VTO, press
“Unlock key” on the front panel, to realize remote unlock function of
VTO.
4.4
DND Function
After DND function is enabled, VTO cannot call VTH.
4.4.1 Enable DND
In standby status, press subtraction sign. When main VTH volume is reduced to 0, the device
enters DND status, while the indicator light is normally on.
Summary of Contents for VTH2201DW
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