4-2 61204659L1-1A
Section 4, Status MX2800 STS-1 User Manual
STS-1 State
1. STS-1 STATE
These fields display the current state of the STS-1. The following sections describe the STS-1 status fields
in detail.
Card A and Card B State
These fields display the current condition of the network. Possible conditions are listed in Table 4-1.
Card A/Card B Alarms
These fields display the current alarm condition of the MX2800 STS-1. Possible conditions and their
descriptions are provided in Table 4-2.
Table 4-1. STS-1 Card A/Card B
Condition Description
Normal The MX2800 STS-1 is ready to pass data.
Alarm The unit is currently receiving an alarm indication.
In Test The unit is currently in test mode.
Table 4-2. 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.
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