HP Jetdirect 250M User Manual page 17

NETWORKS
DETAIL
Wiring: thin coax
An alternative to twisted-pair wiring is thin
coaxial cabling, often called thin coax. This
cabling is known as RG-58A or RG-58U cable,
and has an impedance of 50 ohms. (It looks
similar to the 75-ohm thin coaxial cable used in
television installations, but the television cable
will not work in a network.)
The connectors used with thin coax are BNC
connectors. The cable is a continuous cable, up
to 185 meters (606 feet) long, made up of
shorter segments with BNC connectors at each
end. It connects to computers and other devices
along its length using BNC "T" connectors, and
there is a 50-ohm terminator at each end of the
cable. This cabling scheme does not use a hub.
A thin coaxial LAN operates at a data rate of 10
mbps (megabits per second), and is known as a
type 10Base2 network.