Re: IP cameras on ring topology, not star

By hub on each pole I mean a device connected to the ring, with an ethernet port for 1 camera.

The ring connects all poles and provides a path for the video traffic from each camera to flow around the ring and out through a point on the ring to the DV recorder(s).

IBM sells token ring routers, but they are physically wired as a star (every device has a physical connection back to the router), which does work for this application.

These routers also have a maximum bandwidth of about 30 Mbit/s, which may not be enough for 100+ cameras.

I've seen some gigabit LAN gear which supports a ring topology, but I'm curious to hear if anyone has actually done this.

Matt Ion wrote:
Pat Coghlan wrote:
I'm looking for information on equipment that can/should be used to install IP video cameras on poles around a perimeter (1-2 km, or more).

Token-ring routers typically require all drops to be plugged into a panel (operates in token ring fashion, but physically is a star), which is not practical with 100 cameras running around a ring, feeding traffic back to recorders.

The equipment needs to be economical (hub on each pole).

Any suggestions or real-world examples out there?

Uh... they HAVE broken-ring IP cameras??? AFAIK, all IP cameras are ethernet-based.

A hub on each pole? Are you planning to have multiple cameras on each pole?

A little more detail would be helpful...


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