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2.4.9 Networking Connections
The following is a list of equipment required to set up the V2040N
network:
1. An existing or dedicated Ethernet LAN network.
2. More than one V2040 network site.
3. Video trunk cables.
4. Ethernet cables.
V2040 System Sites
Each V2040 matrix system in the network is referred to as a site.
Each site in the network maintains all of its local control features.
To identify V2040s in a network, each unit is allocated a unique site
number. The site number is defined via the V2040 Programming
Menu. (Refer to the Network Setup Section of this manual).
All V2040s maintain local control functions (for example, local
camera control and monitor/camera switching) even if the Ethernet
network goes down. However, remote V2040 Site control will not
be accessible if the HUB or Switch goes down.
The network will block any attempt from V2040s to control
equipment connected to another V2040 that is off-line. When the
problem is fixed, the V2040s will automatically resume
communications over the network.
Ethernet Cables
A Category 5 or above Ethernet cable connects an V2040 to a HUB
or Switch of an existing or dedicated Ethernet network.
NOTE:
Ethernet Cables must be attached to the Ethernet Port of
the V2040’s external CPU.
Video Trunk Cables
A video trunk cable is a coaxial cable that transfers video signals
between V2040 sites.
A video trunk cable is connected from an output (monitor)
connector on the source (sending) matrix bay to an input (camera)
connector on the receiving matrix bay (Figure 2-26). The number of
video trunk cables determines the number of camera signals from
the Source V2040 Site that can be simultaneously viewed at the
receiving V2040 Site.
Example:
Figure 2-26 illustrates two video trunk cables connected from the
output (monitor) connectors on V2040 Site 2 to input (camera)
connectors on V2040 Site 3. This means two cameras connected to
Site 2 can be viewed simultaneously on two monitors connected to
Site 3. If Site 3 attempts to view more than two cameras from Site 2,
blocking will occur. Only one video trunk cable is connected from
the output connectors on Site 3 to the input connectors on Site 2.
This means only one camera connected to Site 3 can be viewed at a
time on monitors connected to Site 2.
The number of monitors or recording devices that a given Site is
equipped with determines the maximum number of video pictures
that can be simultaneously displayed or recorded at that Site.
Therefore, video trunk cables sending video signals from one
matrix bay to another matrix bay should exceed the number of
monitors or recording devices at the Receiving V2040 Site.
Example:
If Site 3 (Figure 2-26) only has a total of two monitors and/or
recording devices connected to it, there would be no reason to
connect more than two video trunk cables from the output of Site 2
to an input of Site 3 because three video signals cannot be
displayed/recorded on only two monitors/recording devices.
DATA LINE
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Figure 2-26. Video Trunk Cables
The connection of a simple V2040 network is illustrated in Figure
2-26 Up to two cameras from Site 2 can be simultaneously viewed
on monitors at Site 3. Only one video signal from a camera
connected to the V2040 matrix bay on Site 3 can be switched to a
monitor connected to the V2040 matrix bay on Site 2, because only
one input video trunk is connected.
Blocking
Blocking occurs when an V2040 Site requests a video signal from
another V2040 Site and the requests outnumber the video trunk
cables connected.
Example:
Figure 2-26 illustrates two video trunk cables connected from the
output connectors on Site 2 to the input connectors on Site 3. If Site
3 requests three video signals from Site 2, the third request will
cause blocking.
If blocking occurs, the operator must wait until a video trunk cable
is free.
To prevent blocking, enough video trunk cables between the V2040
Sites must be connected.
Example:
If Site 3 requests 2 video signals from Site 2 (as in Figure 2-26),
