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For more information on the different types of Protection Modes, see the
chapter Circuit and Network Redundancy on page 7-1.
Card Comm
This field displays the current state of the communication link
between the two controller cards. OK indicates that the cards are
communicating; F
communicate with each other. If there is only one card installed,
N
DS2 STATE
This field displays the current state of each of the seven DS2s.
Possible states are listed in the following table:
61200290L1-1
AILURE
-R
is displayed.
ON
EDUNDANT
Condition
Description
OK
The DS2 is not receiving alarms.
LOF
The unit detects framing loss across the DS2.
RAI
The unit is receiving an RAI (yellow) alarm across
the DS2. This alarm is a signal sent back toward
the source of a failed transmit circuit. The X-bits
(X1 and X2) are set to zero.
AIS
The unit is receiving an AIS (blue) alarm condition
from the network across the DS2. AIS alarms occur
when the unit receives unframed all ones.
MX2800 User Manual
indicates that the cards are not able to
Chapter 4. Status
4-7
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