Allied Telesis AT-MR820T - Manual (Page 42)

Topology
20
Cascade Topology
A shared Ethernet network can be expanded by interconnecting
repeaters (cascading) through the UTP ports.
Figure 11: AT-MR820T Four Cascaded Repeaters
Figure 11 shows a cascaded topology using four repeaters which is the
maximum number of micro repeaters and nodes allowed in a single
segment: four micro repeaters with ten (AT-MR420T) or twenty-six
(AT-MR820T) ports. Its design complies with the four-repeater rule.
Additional UTP ports are available if the AUI port is used for
cascading.
The Four-Repeater Rule. The IEEE 802.3 standard provides general
rules for 10Base-T cable length and network connections on single
segments of cable or on point-to-point links with media attenuation
and signal propagation delays. The basic rule applies for all networks.
The maximum number of repeaters in the data path between any two
nodes cannot exceed four.
MRx20T(UTP)Ver6_Book Page 20 Thursday, April 3, 1997 5:18 PM