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
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
Low cabling costs
Easy addition of
cameras or workstations
Connect and control
video anywhere in the world
PTZ/DSP control to
cameras over the network
Bandwidth on demand
Multi-task with video
Two year warranty
Part of the Javelin
family of products the Javelin System Solution
QNET NETWORKED CCTV
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
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
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
MIS SPECIFICATIONS FOR 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
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
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
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
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
Note: LAN/WAN is an abbreviation for:
LAN - Local Area Network
WAN - Wide Area Network