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I have a question for using a S250e Camera.
For using S250e Camera, Dose it have any restriction in Poe hub? For example, port number, maximum current, network cable, etc.

Or if the specification of the Poe hub is filled, can I use it?

http://www.naturalpoint.com/optitrack/s ... .html#q223

2-23. What PoE Ethernet switches are suitable for use with OptiTrack PoE Ethernet cameras?

Ethernet cameras require PoE Gigabit (1000 Mbit/s) Ethernet switches that can provide a full 15.4 watts to every port simultaneously.

Most PoE switches are not suitable because they only provide 15.4 watts to a subset of their ports and downgrade the remaining ports to 8 or fewer watts. The Ethernet cameras will not function properly when insufficient power is available to them.

In order to cope with the volume of camera traffic and accommodate future upgrades, the switch must support Gigabit (1000 Mbit/s) for every port. Connecting multiple PoE switches in a star topology to a non-PoE Gigabit uplink switch is recommended for larger camera counts.

NaturalPoint qualified switches can be found in our online store.
http://www.naturalpoint.com/optitrack/s ... ernet.html

Note: PoE MidSpan devices are power injectors and are not switches. Ethernet cameras require sqitches with full 15.4 watts of PoE power per-port.

Thank you for replying my question. And I want to know how to connect PC, hubs, and cameras.

Can I connect cameras to the way below? And if I can connect below,
what kind of cable do I only have to use?(cross cable, or straight cable)

I) PC -- PoE hub -- cameras
II) PC -- PoE hub -- PoE hub -- cameras

Both (I) and (II) will work in your example.

You use the term 'Hub', this is wrong, they are switches, a big difference.

See the Natural Point link, http://www.naturalpoint.com/optitrack/s ... ernet.html

Use Cat6 cables, all straight through, no crossovers.

http://www.naturalpoint.com/optitrack/s ... 201010.pdf shows a diagram of how to daisy chain the switches.

Thank you.

I have another question. Is there a limitation in the length of the cable?

Only the limitation of Cat6 or cat 5 cabling which is effectively about 90 meters (295 feet), which gives you a lot of freedom on how you cable..

hope this helps

Bryan