Troubleshooting guide

MX2820 System Manual
5-24 61186003L1-1D
Slot #A/#B State
This field indicates the current status of the two MUX modules. Table 5-8 provides the
possible states.
DS2 State
This field indicates the current state of the seven DS2s. Table 5-9 provides the possible state
conditions.
Table 5-8. M13 MUX Slot A/B State
State Description
Not Installed A MUX module is not installed in this slot.
Standby The MUX module is ready to pass data, but is currently acting as a
backup module.
Active The MUX module is acting as the primary module.
Table 5-9. DS2 State Conditions
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 from the network across a
DS2. This alarm is a signal sent back toward the source of a failed
transmit circuit. The X-bit is 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.
TST The DS2 is in test mode.