3-32 61204659L1-1A
Section 3, Configuration MX2800 STS-1 User Manual
System Management
STS-1 Alarms
Table 3-9 describes the STS-1 Alarm indications.
Table 3-9. STS-1 Alarm Descriptions
Alarm Meaning 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
Multiframe
The unit detects loss of H4 multiframe from the network.
AIS-L* Line Alarm
Indication
Signal
The unit is receiving a line alarm indication signal. The Section Terminating
Equipment generates AIS-L after detecting LOS or LOF.
AIS-P* Path Alarm
Indication
Signal
The unit is receiving a path 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
envelope.
RFI-L* Line Remote
Failure
Indication
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.
RFI-P* Path Remote
Failure
Indication
The unit is receiving a path remote failure indication. RFI-P is declared when the
incoming path remote defect indication (RDI-P, “1” in bit 5 of the G1 path over-
head byte for contiguous frames) lasts for 2.5 ± 0.5 seconds.
SLM-P* Path Signal
Level Mismatch
A received signal label is mismatched if the received C2 byte does not indicate
unequipped (0) or “VT structured payload” (2).
UEQ-P* Path
Unequipped
The path is unequipped if it is not provisioned. Byte C2 of the STS path overhead
is set to zero.
TLOS* Transmit Loss
of Signal
The transmitter has failed.
*Critical Alarm
To Next Page
Loading...
