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10BT Link(Active Green)
Solid green indicates that the 10BaseT Ethernet interface has
detected a valid SQE heartbeat, signifying a valid 10BaseT
connection.
Status
Blinks yellow from one to eleven times to indicate system sta-
tus. Each pulse pattern is separated by a 2 second “off”
period. Greater pulse patterns have higher priority (buffer sat-
uration has greater priority than an empty MAC table). Valid
system statuses are:
1 pulse = system status is okay
2 pulses = no MAC entries in the MAC Address Table
3 pulses = Clear to Send (CTS) or Carrier Detect (DCD) from
base unit are not asserted
4 pulses = IM1/I buffer is saturated
5 pulses = WAN receive frame(s) too large
6 pulses = WAN receive frame(s) not octet aligned
7 pulses = WAN receive frame(s) aborted
8 pulses = Detected WAN receive frame(s) with CRC
9 pulses = Detected LAN receive frame(s) too large
10 pulses = Detected LAN receive frame(s) not octet aligned
11 pulses = Detected LAN receive frame(s) with bad CRC
LOS
The Loss of Sync LED lights when the unit loses synchroniza-
tion with the incoming signal. This may happen when there is a
framing mismatch or a loss of signal. In unframed mode, the
LOS LED monitors the status of the transmit clock.
TM
(Active Yellow) Solid Yellow indicates an Active Test Mode. The
unit may be placed in test mode by the local user or by the
remote user
ER
The error LED indicates various error conditions, including fram-
ing bit errors, excessive zeros, controlled slips, severe errors, or
bit errors (when sending V.52 test patterns). When sending a
test pattern, the LED will remain lit if the unit does not receive
the identical pattern. When it receives the correct pattern, the
LED will turn off. If error insertion is on, the LED will blink once a
second if everything is operating properly.