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Frequently Asked Questions

NetCorder DIY
NetServer Series (NetServer 1000 / 1500 / 2000 / 3000)
Unet Client Workstation - UCW 500 / 1000 / 2000

NetCorder DIY

Q. I have set up a firewall and I cannot access the live video of NetCorder via NetViewer.
What is the TCP port number for NetCorder?
A. The TCP port number for NetCorder is 1999. After setting this TCP port number for NetCorder, you will be able to access the live video from NetViewer via the firewall.
Q. Is there a Windows 2000 driver for NetCorder DIY?
A. Click here to download the Windows 2000 driver for NetCorder DIY.
Q. What do you recommend as minimum system requirement for NetCorder DIY?
A. Recommended minimum system requirement for NetCorder DIY is;
CPU Pentium II/III, Celeron or AMD
PCI Slot One PCI slot
Memory 64MB SDRAM or above
Display SVGA Display with 1024 x 768, 16M Colour
Network 10/1000 Base T or 56K Modem
Hard Disk 15GB (min recommend)
Operating System Window 98SE/ME/NT/2000 with IE5 or above
Compression for Digital Video Recording MPEG-4 / Wavelet
Motherboard Intel Chipset (highly recommended)
Q. What are the recording capabilities of the card in frames per second and how is this spread across the four inputs?
  For NetCorder DIY, the maximum recording frames per second is 25 f/s. However, if you record all the four cameras simultaneously, the recording frame rate will become 8.8 f/s (i.e. 2.2 f/s for each of the 4 cameras). Since we are using software compression, therefore, some of the frames have been taken for video synchronization.
Q. How do we access the motion detection functionality?
A. To access the motion detection function, just simply right mouse-click a particular camera video window. Then, a motion detection dialogue box will be popped up on the right hand side.
Q. Is it possible to use more than one card per workstation (for eight, twelve or sixteen camera inputs)?
A. Inserting more than one card is not supported since it is a low-end product. To support more than four cameras, you need NetServer-1500, NetServer-2000 or NetServer-3000.
Q. How do we configure an http or an ftp server for use with the NetViewer software?
A. We have included a sample web page using Active-X plug-in with the NetCorder DIY package. Just simply copy to your machine and change the corresponding IP address.
Q. The Minimum requirement for installing NetCorder DIY
A. 1. CPU: Pentium II / III, Celeron or AMD
2. One PCI slot
3. 128M RAM
4. VGA Display with 1024 x 768
5. Network: 10/100 T based, 56K modem
6. Hard Disk: 15Mb or above
7. Operating Systems: Windows 98 or ME or NT or 2000 or IE 5.0
Q. Please confirm that NetCroder DIY uses MPEG4 for hardware encoding.
A. NetCorder DIY uses MPEG-4 software compression, and it requires CPU resources for encoding, the card itself performs as an analog to digital converter.
Q. Can we record at a certain frame rate and resolution and transmit using a different frame rate and resolution?
A. For remote transmission and recording of one camera, NetCorder can perform the recording frame rate of 25 frames per second at resolution of 384 x 288 on both local and remote site via LAN.
Q. Please provide bandwidth information for the following.
A. For transmission at resolution of 384 x 288 with 25fps, the bandwidth requires is approximately 500Kbits/sec. For transmission at 192 x 244 with 25fps, the bandwidth requires is approximately 350Kbits/sec.
Q. Can NetCorder works with UCW - remote module?
A. No, NetCorder DIY cannot work with UCW, only NetServer can.
Q. I have NetCorder PCB and would like to install it on a Windows XP machine, can I get NetCorder updates for Windows XP on the Net?
A. Actually, NetCorder does not need a driver for the capture card under any Windows platform. Once you have installed the application, it will install the actual software by itself. The Windows may ask you for the driver, but you can skip or ignore it. It may leave a "?" in the device manager of your Windows XP but NetCorder will definitely work fine without any problem.


NetServer Series (NetServer 1000 / 1500 / 2000 / 3000)

Q. Does the NetServer come with a built-in modem?
A. Modem is not included
Q. Standard NetServer configuration is with SVGA display or PAL/NTSC monitor?
A. Our Standard products is configured with SVGA output
Q. What optional or extra items are required for the NetServer to be able to send images to the remote site?
A. Our standard model comes with LAN port; you can use LAN network to access the video signals
Q. What is the maximum transmission frame rate NetServer can supports?

It will depend on the number of cameras in use and the NetServer model plus the CPU is also a factor. Total frame rate ranges from 25 fps up to 100 fps.

Q. Can NetServer series support other communication protocols such as TCP/IP, HTTP, FRAME RELAY, ATM or other leased lines from 128Kbs and upwards ) for faster remote transmission ?
A. Yes, under LAN, WAN, Internet, Intranet, leased line, telephone line
Q. On which recording resolution is total recording frame rate of 50fps based?
A. For example, 2.2 fps for each camera recording at 384x288 resolution (8 channel recording at the same time on NetServer 1500). Frame rate will depends on your NetServer model, number of cameras and CPU.
Q. What type of codec is used in the NetServer for the compression of images ?
A. The compression codec is MPEG4
Q. Which type of camera do you recommend for NetServer systems (technical specification)? We have problems with camera connected to the NetServer and the picture of some cameras with AI or manual iris-lens are very bright.
A. There is no special camera requirement for NetServer as long they are as either PAL or NTSC cameras (not both) and are connected to the machine. If you have found that your camera pictures are too bright, please adjust the camera settings accordingly. If you cannot change the camera brightness level, you may manually enable the manual-adjust brightness by closing the jumper and adjusting the thumb-wheel switch on the NetServer PCI card.
Q. Can NetServer runs on Windows-NT platform?
A. We recommend NetServer to be run on Windows 2000 platform.
Q. Virtual memory is found low after a several days of operation?
A. When you run NetServer program, it will automatically occupy all the CPU resources. However, when you start to run other application programs, it will release the CPU resource to other application software. Since we are using software MPEG-4 compression and transmission, we do not recommend other application software to run on the NetServer simultaneously.
Q. Occasionally, hard disk space is found low, even though cycle recording is set.
A. When the harddisk is fully occupied, the oldest files will automatically be overwritten by small portion. From then, it is normal that the harddisk space will always be low at a certain level (enough for OS normal operation ). It will not overwrite the harddisk by large portion since we want to keep the recorded videos for as long as possible.
Q. Please explain the different frame rates for different conditions.
A. If you just connect 1 camera to a NetServer card for recording, you will get 25 f/s (P3 or P4 CPU).
B. If you connect 2 cameras to the same NetServer card for recording, you will only get 4 f/s (P3 or P4 CPU) for each of the 2 cameras.
C. If you connect 3 or 4 cameras to the same NetServer card for recording, you will only get 2.5 f/s and 2.2f/s respectively for each of the 3 and 4 cameras.
D. If you connect only 1 camera for each of 4 NetServer cards (NetServer 2000 / 3000 only) for recording, you will get very close to 25f/s for each of the 4 cards (with P4 1.5GHz & 128M RAMBUS).
E. If you connect all the 16 cameras with 4 NetServer cards (NetServer 2000/ 3000) for recording, you will get 2.2 f/s for each of the 16 channels (P4 CPU). Note:The result on the frame rate is the same as using one card with 4 camera inputs.
Note: The frame rate may be affected if there is any remote viewing from the UCW while the recording is taking place on NetServer OR local display on NetServer.
Q. How long can it record (16 cams) and what is the size of the disks (are they IDE or SCSI and can external RAID storage be used)?
A. If you record 16 channels continuously (at 2.2f/s), it takes approximately 7.6GB hard disk space per day. When you are using 80GB hard disk it can store up to 10 days of information. You can use IDE, SCSI or RAID hard disk..
Q. Can the disks be recorded as "ring memory" (partitioned i.e. in hour segments, and when the last segment is full, the first is overwritten again)
A. You can use circular mode for recording. It means when the hard disk is full, the new video will overwrite the oldest video files. Alternatively, you can set within a certain period for circular mode.
Q. My customers wish (if possible) to do playback while still recording. (i.e.: on camera 7 something happened, so he wants to replay this camera while still recording all cams 1-16. I guess this is possible.
A. Yes, it is possible. You can playback while recording or monitoring.


Unet Client Workstation - UCW 500 / 1000 / 2000

Q. We have setup UCW 2000 properly at our client site however the pictures we see from the machine is not clear and cannot see any images from the pictures, and only lines on a black background.
A. For UCW-2000 to run properly, you must set your desktop resolution to 1024 x 768 with 16 bits colours only. Also, we recommend that you use Matrox G450 (SVGA card) which can provide dual display feature.
Q. Sometimes, UCW cannot connect to the NetServer but after reboot it seems to do so.
A. Please make sure that no two UCW users with the same user name and password are logged onto the NetServer at the same time. Also, please make sure that you have typed the user name and password correctly (case-sensitive) for UCW.
Q. Can the UCW do reconnection to NetServer, if the connection between is disconnected for a period?
The current version of UCW-2000, UCW user needs to re-connect the NetServer by himself if the system is disconnected. However, when you restart the UCW by typing the corresponding user name and password correctly, the UCW will display the previous camera images automatically.

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