Planet Technology FSD-504PE - Manual (Page 6)

collision domains, making it possible to expand your Fast Ethernet network beyond the 205-meter
network diameter limit for 100Base-TX networks. Switches supporting both traditional 10Mbps
Ethernet and 100Mbps Fast Ethernet are also ideal for bridging between the existing 10Mbps
networks and the new 100Mbps networks.
Switching LAN technology is a marked improvement over the previous generation of network
bridges, which were characterized by higher latencies. Routers have also been used to segment
local area networks, but the cost of a router, the setup and maintenance required make routers
relatively impractical. Today switches are an ideal solution to most kinds of local area network
congestion problems.
Power over Ethernet Technology
The Switch also supports IEEE802.3af in-line power technology. Power over Ethernet Technology
is using the un-used UTP wire to transmit the power over the Cat-5 UTP to the remote end-node.
Follow the IEEE802.3/802.3u Ethernet standard, 100Base-TX and 10Base-T will only use 2-pair of
the UTP cable for data transmission and receiving (refer to Appendix B for more). And Power over
Ethernet, however, will used the un-used 2-pair of UTP Cat. 5 cable for power transmission. The
power transmission either can be a direct current without any detection/ protection or can also
deploy the new standard IEEE802.3af.
Two devices required in this technology, injector and splitter. The injector combine the Ethernet
signal and 48VDC currents through UTP cable to the remote end. And splitter split out the two
things to the device, DC power to turn on the device and others for data sending / receiving.
IEEE802.3af uses the protection circuit to detect the support features of remote end-node in a very
short time. If the remote-end reply the injector with 802.3af supported signal, the injector will then
provide the DC current over the wire to power on the Switch. Otherwise, the Switch will never be
turned on.
Features
The Switch were designed for easy installation and high Performance in an environment
where traffic on the network and the number of user increase continuously.
The Switch with their small, compact size was specifically designed for small to middle
workgroups. The Switch can be installed where space is limited; moreover, it provides
immediate access to a rapidly growing network through a wide range of user-reliable
functions.
The Switch is ideal for deployment with multiple high-speed servers for shared bandwidth