Troubleshooting guide

MX2820 System Manual
8-10 61186003L1-1D
DS3 Alarms
Table 8-5 provide information for DS3 alarms.
DS2 Alarms
Table 8-6 provides information for DS2 alarms.
Table 8-5. M13 MUX DS3 Alarms
DS3 Alarm Description Severity Level
AIS This alarm indicates an Alarm Indication Signal (AIS) is
detected on the DS3 input side of the M13 MUX module.
AIS alarms occur when consecutive 1010s are received in
the information bits. This indicates that there is a
transmission fault located either at or upstream from the
transmitting terminal.
Alert
LOS This alarm indicates a Loss-of-Signal (LOS) condition
(DS3 failure) is detected on the incoming DS3 signal.
Critical
OOF This alarm indicates an Out-of-Frame (OOF) condition is
detected on the incoming DS3 signal.
Critical
RAI This alarm indicates the MUX is receiving Remote Alarm
Indication (RAI) [yellow] on the DS3 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.
Alert
XCV The unit is receiving excessive code violations from the
network, exceeding the XCV threshold parameter.
Alert
IDLE The DS3 interface is receiving an idle sequence from
network.
Alert
TEST The DS3 interface has been placed into a test (loopback)
mode.
Alert
Table 8-6. M13 MUX DS2 Alarms
DS2 Alarm Description Severity Level
OOF This alarm indicates an Out-of-Frame (OOF) condition on
the DS2.
Major
AIS This alarm indicates AIS is being received on the DS2.
AIS alarms occur when the unit receives unframed all
ones.
Alert
RAI This alarm indicates RAI is being received on the DS2.
This alarm is a signal sent back toward the source of a
failed transmit circuit. The X-bit is set to zero.
Alert
TEST The DS2 interface has been placed into a test (loopback)
mode.
Alert