Appendix 1. Ethernet Control LAN Network Construction Guide
20
(5) The transceivers of the repeaters are counted in the maximum transceiver units (100 units)
connected to one segment.
The repeaters may be installed anywhere on the segment where a transceiver can be connected.
More than one repeaters may be connected.
The maximum number of transceiver units is 100 on one 10BASE5 coaxial cable segment. A
two-port multiport transceiver is counted as 2 units.
Cable segments and link segments
There are two types of segments as defined in the IEEE802.3 standard: cable segments and link segments.
The differences affect the constraints for expanding transmission lines. This section describes the
differences between these segments.
Cable segment
Consists of a set of coaxial cables whose ends are terminated with characteristic impedance. A
transceiver is attached to this segment to connect a station. This is also called as a coaxial segment.
Link segment
A point-to-point connection cable with repeaters (or transceivers) at both ends. No station is connected.
In the TOSDIC-CIE DS system, this refers to the following three types of segments.
- An optical fiber cable with optical repeaters connected at both ends.
- A coaxial cable with electric repeaters connected at both ends, with no station connected.
- A twisted pair cable that connect a hub and station on 10BASE-T (a hub is a kind of repeater).
To Next Page
Loading...
Need help?
General
