Specifications

Ethernet Devices 6-3
Ethernet Repeaters
Multi-port Transceivers
A multi-port transceiver or fanout is a transceiver that has one port to
connect to a regular transceiver and up to fifteen AUI ports to connect
through AUI cables to individual devices. This allows you to connect
several addressable devices to one cable tap. IEEE 802.3 standards for
transceiver placement and tap spacing specify that only 100 taps will be
allowed on a 10BASE5 segment with a distance of 2.5 m between them. If
it becomes necessary to concentrate a number of workstations in one
physical location, a multi-port transceiver can be used.
Figure 6-4 shows a typical multi-port transceiver.
Figure 6-4. Standard Ethernet Multi-port Transceiver
Ethernet Repeaters
If it is necessary to add additional taps beyond the 100 tap limit, another
coaxial segment must be added. If the new segment uses the same
architecture at the Physical Layer of the OSI model as the old segment, a
repeater can be used to join the two segments. A repeater regenerates the
preamble, and amplifies and retimes the signal from one cable segment to
the other.
AC
1
2
3
4
5
6
7
8
Network
1913-15