User's Manual

GVR3550 USER MANUAL
Grandstream Networks, Inc. GVR3550 User Manual Page 14 of 76
Firmware Version 1.0.0.0 Last Updated: 10/2013
10.
Alarm Input Interface
1 ～ 16:
16 alarm input interface, receiving binary signals of
external alarm like Normally-closed alarm and
normally-open alarm.
When applying the external power to electrify the alarm
input device, the latter should be common-grounded with
the GVR.
11.
Alarm output Interface
1 ～ 2:
2 sets alarm output interface, output alarm signal to the
external alarm device, power supply is required for
external alarm device.
12.
Alarm Grounding
Interface:
Public alarm input grounding interface
13.
Grounding:
Grounding
14.
FAN:
Used for heat dissipation
DEVICE CONNECTION
The GVR3550 contains no HDD with packaging, users need to check the device and install HDD when use it
the first time.
INSTALLING HDD
We suggest to use the recommended models by Grandstream( 7200 RPM HDD and above), the PC HDD is
not recommended.
Please install the GVR3550 HDD according to the following procedures:
1. Twist four screws gently on the bottom of the HDD, don’t twist too tight.
2. Remove the fixed screws on the back and side panel of the device, open the cover plate to find the HDD
installing position.
3. Side put the main case, Aim the HDD with four screws at the corresponding round holes on the baseplate
then push the screws to the screw holes to stick them.
4. Twist the screws.
5. Repeat the previous steps to install other HDDs(install one HDD next to the other with connected HDD
cables ).
6. Plug in four HDD cables and power cables to the interfaces of the mainboard .
7. Put the cover plate back to GVR and twist the screws.