Troubleshooting guide

Section 5, User Interface Guide - UIG-510, Status
61186003L1-1D 5-27
STS-1 State
State
This field displays the current state of the STS-1 network for the specified STS-1 MUX module.
Table 5-11 lists the possible conditions.
Alarm
This field displays the current alarm condition for the STS-1 module. Table 5-12 lists the
possible alarm conditions.
Table 5-11. STS-1 State Conditions
Condition Description
Normal The MX2820 (STS-1 MUX module) is ready to pass data.
Alarm The unit is currently receiving an alarm condition. Table 5-12 lists
the alarms.
Test The unit is currently in test mode.
Alarm/Test The unit is currently in test mode and is receiving an alarm condi-
tion.
Table 5-12. STS-1 Alarm Condition Descriptions
STS-1 Alarm Definition Condition Description
LOS Loss of Signal The unit has lost the network receive signal.
LOF Loss of Framing The unit detects a framing loss from the network.
LOP Loss of Pointer The unit is unable to detect a valid pointer in the receive
signal.
LOMF Loss of Multi-Frame The unit detects loss of H4 multiframe from the network.
AIS-L Alarm Indication Signal -
Line
The unit is receiving a line alarm indication signal (the
section terminating equipment generates AIS-L after
detecting LOS or LOF).
AIS-P Alarm Indication Signal -
Path
The unit is receiving a line alarm indication signal (AIS-P
is defined as all ones in bytes H1, H2, and H3 as well as
all ones in the entire STS synchronous payload enve
-
lope).
RFI-L Remote Failure Indication
- Line
The unit is receiving a line remote failure indication
(RFI-L is declared when the incoming line remote defect
indication [RDI-L, “110” pattern in bits 6, 7, and 8 of the
K2 line overhead byte] lasts for 2.5 ±0.5 seconds.