3Com Network Video Server FlexWATCH 3110 - Manual (Page 82)

Network Video Server User’s Manual
Seyeon Tech Co., Ltd 82
maximum number of pre alarm for e-mail, ftp or Alarm buffering service (Pre alarm only)
can be done with this buffer size, if there is enough memory space for respective services.
Note that there must be enough memory space left for e-mail, ftp and Alarm Buffering
service (Pre alarm only), since respective service (e-mail, ftp or Alarm buffering service)
consumes separate memory in addition to pre alarm buffer size configured to make a real
service.
Delay between pre-alarm image :
This is the set up pre alarm speed when the server store image in the system memory.
1000mse is equal to 1sec and basic unit is 10msec. If you want to get 10fps pre-
alarm speed, 10 will be very appropriate number for Delay value.
* Maximum Pre alarm buffer should be the half size of Total Pre Alarm buffer
size memory assigned in the system, since Pre alarm images for e-mail, FTP or
alarm buffering service are taken from Pre alarm buffer pool and any Pre alarm
image for these services require additional memory space.
1) Go to Advance service mode in the Service configuration section
2) Go to “Buffering service” mode
3) Set up pre-alarm Buffer size and delay time.
4) Click “Buffer Calculator” button to run the calculator.
1.2 Buffer calculator
Through “Buffer Calculator” option, you can easily calculate assignable pre/post alarm
buffer size for each channel before setting up Pre/Post alarm buffer frame in the system
memory.
Following is logic for Pre/Post alarm assignment. By running buffer calculator you can try
pre/post alarm size.
Total buffer size 23500 kb
Total Pre-alarm buffer size (40%)
- INTPLUS [2005] -