Grandstream GVR3550 User Manual - Manual (Page 21)

Grandstream Networks, Inc. GVR3550 User Manual Page 21 of 120
Firmware Version 1.0.0.65 Last Updated: 10/2014
NOTE:
 VGA does not support automatic resolution matching.
 There is only one valid output when connect to VGA and HDMI monitor the
same time. HDMI is valid while VGA is not by default. Users can also go to
System Settings->Display to set parameters like Screen resolution,
brightness, contrast, saturation and hue.
CONNECT ALARM DEVICE
Alarm input/output connection procedures are as follows:
1. Connect the alarm input device to the alarm input port.
2. Connect the alarm output device to the alarm output port.
3. Enter the GVR3550 main menu, set corresponding settings to alarm input/output on the Alarm Settings
page. Alarm serial number 1 corresponds to the first alarm input on the GVR3550 I / 0 port, the
following numbers keep to the same matching sequence. Set normally-opened alarm and normally-
closed alarm according to the corresponding high /low electrical when alarm.
4. Set alarm output on the Alarm Settings page. Alarm output 1 corresponds to the first alarm output; the
following numbers keep to the same matching sequence.
EXTERNAL INTERCOM DEVICE
GVR3550 support web paging and local paging:
1. Connect the audio-input device like microphone or pickups with RCA port to the audio input port on
the rear panel.
2. Connect the audio-output device like speaker or stereo with RCA port to the audio output port on the
rear panel. (The steps above ensure the GVR3550 could input or output audio)
3. Connect the microphone to the audio input of PC, the earphone or stereo to the audio output of PC.
Connect the audio input/output device to the compatible cameras.