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Section 3, Configuration MX2800 M13 Multiplexer User Manual
Figure 3-15. Alarm Relay Configuration Menu
Table 3-5 describes the alarm conditions found in the Alarm Relay Configuration menu.
Table 3-5. Types of Alarms in Alarm Relay Configuration
Alarm Level Description
DS3 Alarms
RAI Critical The unit is receiving an RAI (yellow) alarm from the network. 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 Critical The unit is receiving an AIS (blue) alarm from the network. This alarm
occurs when consecutive 1010s are received in the information bits,
indicating the fault lies at or upstream from the transmitting source.
LOS Critical The unit has lost the network Rx signal.
LOF Critical The unit detects a framing loss from the network.
XCV Noncritical The controller card is receiving code violations in excess of the user
specified threshold. Refer to XCV Threshold on page 3-15.
TLOS Critical The controller card transmitter has failed.
DS2 Alarms
RAI Noncritical The unit is receiving an RAI (yellow) alarm from the network across a
DS2. This alarm is a signal sent back toward the source of a failed trans-
mit circuit. The X-bits (X1 and X2) are set to zero.
AIS Noncritical The unit is receiving unframed all ones across a DS2.