68x Series
Getting Started
22
The red BEACON LED is on when the instrument detects a beacon frame on
the network or when it transmits a Beacon frame. If this LED is on
continuously, your ring is in a beaconing state. Manual intervention is usually
required to recover a ring that has been in a beaconing state for more than a
minute.
Collision/Ring Error
The yellow COLLISION LED is on when the instrument detects a late, a local,
or a remote collision. Local and Remote collisions are not reported on 100
Mbps networks.
The yellow RING ERROR LED is on when the instrument detects any kind of
ring recovery frame on the network, such as soft error, ring purge, claim token,
or when the neighbor notification is incomplete.
Polarity/Wire Fault
The red POLARITY LED is on when the instrument detects reversed polarity
on the receive link for a 10BASE-T connection. The state of the Polarity LED
is only valid if the instrument is connected to a hub.
The red WIRE FAULT LED is on when the instrument detects a fault in the
lobe wiring between it and the MAU.
Link Active/Insert
The green LINK ACTIVE LED is on when the instrument receives the link
pulse from an Ethernet hub.
The green INSERT LED is on when the instrument inserts into the ring or, in
the Expert-T mode, when the attached station is inserted into the network
through the instrument.
Transmit/16 Mb/s
The yellow TRANSMIT LED is on when the instrument transmits a frame.
The yellow 16 Mb/s LED is on when the instrument detects the ring speed as
16 Mbps or, if doing a NIC Autotest, when it detects the NIC speed as 16
Mbps.
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