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Chapter 4. Status
State
Displays the current condition of the network. Possible conditions
are listed in the following chart:
Condition
Normal
Alarm
In Test
Alarm
This field displays the current alarm condition of the MX2800.
Possible conditions are given in the following chart:
Condition
Normal
RAI
(remote alarm
indication)
LOS
(loss of signal)
AIS
(alarm
indication
signal)
LOF
framing)
Excessive
CV
4-2
Description
The MX2800 is ready to pass data.
The unit is currently receiving an alarm indica-
tion. Alarm types are discussed in the following
section, Alarm .
The unit is currently in test mode. See Diagnos-
tics on page 6-1 for information on the test type.
Description
No alarms are currently being received.
The unit is receiving an RAI (yellow) alarm from
the network. This alarm is a signal sent back to-
ward the source of a failed transmit circuit. The X-
bits (X1 and X2) are set to zero.
The unit has lost the Rx signal.
The unit is receiving an AIS (blue) alarm condi-
tion from the network. AIS alarms occur when
consecutive 1010s are received in the informa-
tion bits. This indicates that there is a transmis-
sion fault located either at or upstream from the
transmitting terminal.
The unit detects a framing loss from the network.
(loss of
The unit is receiving excessive code violations
from the network, exceeding the threshold set by
the user (see XCV Threshold on page 3-4).
MX2800 User Manual
61200290L1-1
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