A&C authorizations.
3.2 Bidirectional Talk with Management Center
Under any interface, by pressing SOS button, you may immediately switch to call
management center, and if the call goes through, you will hear corresponding audio response
of long and slow beeps from VTH; if the call does not go through; you will also hear
corresponding audio response as short and fast beeps from VTH. You may press SOS button
again to end the call, and VTH will return to standby interface.
When supervisor station calls VTH, VTH will ring, and you may answer by pressing call
button. You may end call by pressing call button again, and VTH will return to standby interface.
See Ch 3.1.
3.3 Visual Bidirectional Talk with Door Station
When door station calls VTH, VTH will ring, meanwhile door station video will be displayed
on screen. You may press call button to answer and then you may perform a bidirectional talk
with the door station, while the screen continues displaying video from door station. You may
end call and video by pressing call button again, and the VTH will return to standby interface.
You can set MIC, call, ring, brightness and contrast when talking to VTO. See Ch 3.1.
When there is incoming call on VTH (before answering call), you can press menu button
to set ring. See Ch 3.1.
Note:
When matching with VTO, under monitoring status, press Call button to talk to VTO.
3.4 Monitoring Function
Under standby interface, by pressing monitor button, you may view video from door
station on the screen. You may turn off monitoring by pressing monitor button again, and VTH
will return to standby interface.
You can set MIC, call, ring, brightness and contrast under monitoring interface byu
pressing menu button. See Ch 3.1.
Note:
When matching with VTO, under monitoring status, press Call button to talk to VTO.
3.5 Unlocking Function
When call from door station, call door station or VTH monitors door station, you may
remotely unlock door station by pressing unlock button.
3.6 DND Function
Under standby status, you may turn on DND function by long pressing call button for 5s;
meantime the screen turns on, there will be corresponding message at left middle position.
Under DND, when door station calls, you may use the video function without incoming ring.
You can connect and start to talk by pressing call button.
Note: For program of some versions, under DND status, message will directly
