Allied Telesis AT-MR815T - Manual (Page 13)

AT-MR415T and AT-MR815T Installation Guide
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Jabber Lock-up Protection
Jabber lock-up protects the repeater from being overrun with data packets. It
does this by isolating those segments with transmitted packets that exceed the
maximum packet length. That is, jabber lock-up automatically prevents
transmitted data from reaching the repeater if the transmitted data time
exceeds a specified duration (usually 5 ms).
AT-MR415T
Figure 1 shows the front panel of an AT-MR415T.
Figure 1: AT-MR415T Front Panel
Light Emitting Diodes (LEDs)
Four Link LEDs show the connectivity of each network port. Three additional
LEDs indicate Activity, Collision and Power for the repeater itself.
Note that LEDs will not reflect real-time activity since a data packet is too fast
for the human eye to distinguish. therefore the repeater artificially stretches
the LED “on” time for easier observation.
❑ LINK ON lamp (green)
— There is a green LINK ON LED for each 10Base-T port. This LED
is lighted when the twisted pair cable for the corresponding
10Base-T port is properly connected, the port has established a
valid link, and the automatic port connect/disconnect function has
been enabled.
In other words, the LED is lighted anytime a valid communications
link has been established for the corresponding port. If the LED is
not lighted, check the twisted pair cable to ensure a proper port
connection has been made.
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