Plug all 10base-t cables into the 10base-t netw, Plug the opposite end of the 10base-t cables in, Perform the following to cascade two at-mr415t – Allied Telesis AT-MR815T User Manual
Page 25: The four-repeater rule
AT-MR415T and AT-MR815T Installation Guide
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4. Plug all 10Base-T cables into the 10Base-T network ports (connectors) on
the back of the unit. When connecting to the port directly to the right of the
MDI MDI-X toggle switch, make sure the switch is set to MDI-X (right
position) to use the port as a normal network connection. See step 6 below
for instructions on cascading two HUBs.
5. Plug the opposite end of the 10Base-T cables into the network computers.
6. Perform the following to cascade two AT-MR415T/AT-MR815T Micro
Repeaters together:
Port 4 of the AT-MR415T and port 8 of the AT-MR815T are designed to
allow HUBs to be cascaded together (cascade port). To cascade an
AT-MR415T/AT-MR815T Micro Repeater with an existing device, select
MDI using the MDI MDI-X toggle switch and connect this port to any
normal network port of the existing HUB using a straight twisted pair
cable. Only select MDI on the HUB when using the cascade port to connect
to another HUB.
Note
When cascading two HUBs together, be sure to provide a cascade port
on one HUB and a normal UTP port on the other. This is done by
selecting MDI-X on the HUB using the cascade port.
It is also possible to cascade an AT-MR415T/AT-MR815T Micro Repeater
to another HUB using the 10Base-T port of the other HUB and a crossover
twisted pair cable.
Note
It is difficult to distinguish between a straight twisted pair cable and
a crossover twisted pair cable by visual inspection. When using both
types of twisted pair cable, it is necessary to keep track of which
cables are of which type. To avoid confusion, it is recommended that
you avoid the use of crossover twisted pair cable.
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 is that, for any network, the maximum number of repeaters in
the data path between any two nodes cannot exceed four.