User's Manual

GVR3550 USER MANUAL
Grandstream Networks, Inc. GVR3550 User Manual Page 75 of 76
Firmware Version 1.0.0.0 Last Updated: 10/2013
multi-channel monitoring : Quad core CPU, discrete graphics, display adapters memory
256M or higher.
MAINTENANCE
The wet dust on the circuit board would cause short circuit thus influence GVR operation or cause damage,
please regularly dusting the circuit board, connector and PC case with a brush at regular intervals.
Please ensure stable grounding condition so as to avoid video and audio signal interference as well as being
damaged by static electricity or induced voltage.
Please do not electrify plug the audio/video cables and RS 232, otherwise these ports can be easily damaged.
Please don't turn off the GVR power switch directly, use the shutdown button on the front panel (long
hold the button for more than 3 seconds) to enable the device to switch off automatically so as not to damage
HDD.
Keep hot reservoir and high temperature environment away from the GVR.
Ensure unit is installed in a well-ventilated environment to facilitate heat dissipation.
Please carry out inspections and maintenance at regular intervals.
RECORD TIME CALCULATION
Please confirm the HDD has been installed when install the GVR3550 for the first time.
HDD Space formula is:
HDD Total Space(M ) = The number of channels * Requied Time(Hour)* The HDD space occupied
per hour（M/H）
From the formula above we could conclude Record Time formula:
Record Time（hour）= HDD Total Space(M)/【The HDD space occupied per hour（M/H）*the number
of channels 】
The GVR3550 is equipped with MPEG4/H.264 compression technique, its dynamic range is quite large, thus
the calculation of HDD space requires assessing the file size recorded per hour in each channel according
to stream.
i.g.:
The record in one single channel takes up 200 m/h HDD space per hour, use the GVR3550 to record with
synchronous 12 channels.
Record Time（hour）=（2*4*1024*1024）/【200（M/H）*12】=3495.25（Hour）(145.6（Day）