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Qcomp.jpg (4876 bytes) ... Isn't for everyone but it may be for you !

If you buy, sell or specify large-scale CCTV systems, then QNET is for you.

   Javelin takes the next logical step in systems technology by introducing QNET, a fully networked solution to CCTV, based on the popular Quest and Quest Plus for Windows architecture. Quest for Windows integrates matrix video switcher in the PC chassis which is modularly configurable with plug-in boards up to 64 cameras, 16 monitors, and 128 alarm points. In contrast, Quest Plus for Windows integrates external matrix video switcher for up to 300 cameras, 80 monitors, 1000 alarms, and 1000 relays.   
    QNET is a LAN/WAN solution for switching, distribution, and control of CCTV using Quest and Quest Plus for Windows on a standard Ethernet infrastructure. With QNET, cameras, PTZs, and switchers can be connected to existing LANs or deployed on new, dedicated networks.
    QNET offers all the advantages of LANs for your CCTV requirements.
    QNET is a product member of the total Javelin System Solution. Javelin's competitively priced product line includes everything needed for a complete CCTV security system. The Javelin System Solution offers one-source shopping, the most economical way to select from an industry- leading, full-service product line. From cameras to monitors to pan/tilts to multiplexers to switchers to quads to complete systems, Javelin's family of products gives you a powerful sales edge and dramatically reduces installation and maintenance costs.
    Javelin's leading-edge product warranties are our pledge to stand behind everything we sell. QNET comes with a two year warranty.

Low cabling costs
Easy addition of cameras or workstations
Desktop conferencing (future)
Connect and control video anywhere in the world
PTZ/DSP control to cameras over the network
Supports ISDN/POTS gateways
Bandwidth on demand
Intuitive graphics control
Multi-task with video applications
Two year warranty
Part of the Javelin family of products the Javelin System Solution

Suggested Applications
Security & surveillance
Advanced Traffic Management Systems
Interoffice communications
Process control
School systems

illustration of LAN-1 and LAN-2
    QNET is a fully networked CCTV system. Video is gathered at CCTV servers acting as an interface to CCTV equipment such as video switchers, PTZ, domes, alarms, and relays. The NTSC/PAL video at the server is digitized and compressed and packetized via TCP/IP and made LAN ready. The QNET encoders can be installed in the server PC if there are enough board (PCI) slots available. If not, there is a QNET Super Server with ten (10) PCI slots for encoder boards. In addition, an encoder cage is available which will allow up to ten encoder cards to be installed. Multiple cages can be used in large applications. The encoded video is then shipped via the LAN to any workstation requesting the video.
    Workstations use a client version of Javelin's QNET software or a networked version of Javelin's graphics controller (QUIC/NET). Each having a QNET decoder board installed to decompress selected video and display it on the workstation CRT.
    The QNET encoders and decoders are stand alone boards using little or no CPU resources. QNET has a separate network interface to prevent a bottleneck for other data. Thus, workstations can be multitasking other applications while viewing and controlling the CCTV system. All controls for the CCTV system are available as an overlay on the workstation's CRT. PTZ, video switching, alarm handling, etc. can all be performed from the workstation using simple mouse controls. This eliminates costly and cumbersome control panels.
    QNET is a state-of-the-art solution for much needed networking of CCTV. With multiple server support, QNET allows cameras and controls to be gathered in logical areas of usage. This eliminates long and costly cable runs for coax or fiber to get the video to a centralized switching point.
    QNET offers a host of features which take CCTV far beyond a security system. Anyone on the network can select and control any camera on the network. It doesn't matter that the camera located in another state or country. The system supports WAN/ GAN through normal network connections.
    QNET has the capability for different video bit rates. The encoders/decoders use H.320 standards. The bit rate is adjustable to conserve bandwidth on the LAN. For example, fixed cameras can be set for 64Kbs while PTZ cameras can be set for 384Kbs. This allows a feature referred to as "bandwidth on demand".
    In the future, QNET will support DVC (desktop video conferencing). If the workstation has both camera and audio, QNET can support desktop to desktop video/audio communications. DVC is the next step in corporate communications.
    QNET can be integrated with other security control systems such as access control, alarms, etc. This integration can take place at the network level or through a host port on the CCTV server. With this level of integration, alarms and access control can be handled at the workstation level.
    QNET is the first step of the future of integrated, networked security/business solutions for the corporate world. With QNET, video distribution is no longer expensive. Adding or moving cameras in the business environment is as easy as plugging in a network device.

sample screens of QNET

    A typical QNET server contains the same number of video encoders as the number of clients who need to view the video simultaneously. Each contains a 3Com Etherlink 111 PCMCIA network card and can be connected to a 10 Base-T Ethernet LAN.
    Network load is split into two channels: video and control.
Video channel each encoder can take up to 768 kBits/s of available bandwidth (under 10 Base-T Ethernet - 10 Mbits/s), lower boundary determined by desire video quality (in practice no less than 64 kBits/s).
Control channel server application is a network application and can be connected to a maximum five QNET clients. The volume of data involved maintaining clients is neglectable.
    The total volume of data on the network that involves video transmission depends on the number of connections between encoders and decoders and can be estimated by summing the bitrates of all active encoders. In a general case, it would be:
Load-from-Video = BitRate * Number of Connections + Delta where BitRate variable (range 64-768 kBits/s)
Delta variable, includes retransmission due to collisions, depends on total load of data on a given network, the more data on the network, the higher the number of collisions.

    All of the above can be applied to a QNET client. A QNET client will typically receive one video decoder.
    QNET is based on the TCPIP stack. Video data is presently transferred using Transfer Control Protocol (TCP). When the DLL becomes available, User Datagram Protocol (UDP) will be used allowing multiple decoders to receive video from a single encoder. The control channel is built on the stream socket (TCP).
    When connecting, be certain that the control channel between the server and the connecting client is established. Then, the video channel is created. The video decoder attempts to connect (UDP) to the video encoder. This means that control channels need not be visible from the video channel and vice versa and could be run within a separate subnet.

1. PC PCI bus based machine (decoding site)
     Pentium 100 mhz min
     16 meg memory
     Video must be PCI, capable of 16 bit High Color
      (2 meg video ram)
     Video driver S3 compliant
2. Windows 95, TCP/IP stack loaded
3. Available IP addresses each network card in the QNET system must have the permanent IP address (DHCP service cannot be used). Addressing includes:
A. PC that is to work as a server (its network card)
B. Video encoder (PCMCIA Etherlink card embedded in the video board)
C. PC that is to work as a client (its network card)
D. Video decoder (sitting inside decoding PC)
    The IP addresses should be available prior to QNET System installation since they need to be programmed into video encoders/decoders. If video is to be routed to another network, the Default Gateway IP address and netmask must be supplied. If QNET System is to be installed on the Token-Ring Network, than routing to/from Token-Ring will be required (video encoding/decoding hardware supports Ethernet Network, only).

product shots
Encoder Board
-- The encoder board which fits in a PC, PCI slot and performs the function of converting a NTSC/PAL signal to a H.320 TCP/IP data package which is LAN ready. The encoder board can be installed in the server PC. In applications where more encoders are needed than can be installed in the server PC, a card cage can be used for housing encoder boards.

Decoder Board -- The decoder board which fits in the client workstation PC, PCI slot, decodes the packaged TCP/IP H.320 data from the network and displays it on the workstation CRT as a video window. The decoder board also has NTSC/PAL output to drive a local monitor for those applications where the customer prefers a large video monitor instead of a VGA/CRT display.

Super Server -- The Super Server is a rack mounted industrial PC with 133mhz Pentium Processor, 16 MB RAM, on-board video, and up to ten (10) PCI slots for encoder boards.

Encoder Cage -- The encoder cage is rack mounted and will house up to ten (10) encoder boards for multiple encoding. Each encoder board is a separate network node.

QNET Software -- QNET software is a complete network system for either security or Advanced Traffic Management Systems. QNET software offers server/client control of CCTV Camera switching, pan/tilt/zoom, alarms and relays. For ergonomic operation, a graphics version QUIC/NET is available.

Note: LAN/WAN is an abbreviation for:
LAN - Local Area Network
WAN - Wide Area Network


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