Grandstream GVR3550 User Manual - Manual (Page 29)

Grandstream Networks, Inc. GVR3550 User Manual Page 29 of 120
Firmware Version 1.0.0.65 Last Updated: 10/2014
19 Vol Button +-
Adjust the volume of the cameras when preview or its
volume when play back record.
20 A-I Button +- Adjust aperture at PTZ control
21 A-F Button +- Adjust focus at PTZ control
22 Zoom Button +-
 Electronic zoom adjustment at PTZ control.
 Electronic zoom adjustment when one camera.
Playback record at full screen.
The correct way to use IR remote control: Batteries must be installed before use. Please aim the remote
control at the IR receiver on the GVR3550 then make operations. If the GVR3550 receives the control’s
command, you can use the control to manipulate the GVR3550. If failed, please check whether the
following reasons are the causes:

Check the battery polarities

Check whether the battery power

Check whether the remote sensor is obscured.

Check whether a fluorescent lamp is being used nearby.

If the remote still cannot function normally beyond the above situations, please change a remote and
try again, or contact the device provider.