American Dynamics Excalibur 168, Installation And Service Manual

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APPENDIX C
MP168 Matrix Switcher/Controller System
Star Link Guidelines
With a star network link, up to four branches connect to a central “hub” location. Devices can attach with a single
continuous cable (backbone style) or separate cables (daisy chain style).
A star topology is a good solution when using existing cable. It also allows easy reconfiguration as devices are added or
relocated.
Daisy Chain Style Star
Backbone Style Star
T = Terminated
T
HUB
T T
CCM - T
HUB
CCM
T T
T T
Devices
Devices
Devices
Devices
Devices
Figure C-5 - Star Links
1. Terminate devices at the end of each branch (4 maximum). Leave all others unterminated.
2. Attach up to 32 devices on each link.
3. Limit combined cable length (from host to farthest device) to 1 km (3281’) or less.
4. Whenever possible, attach devices backbone style, following the instructions under Backbone link Guidelines.
Network Checkout
To simplify network checkout, attach devices in stages, one J-Box at a time. Attach all devices associated with the first
link before starting the second link. After connecting a set of devices, select each one individually from the surveillance
system and confirm that the device response is correct. If not, correct the problem before continuing with installation
activities.
C-5