Agilent Technologies 622Vu Advisor, User Manual

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Alarms
The first two alarms indicate major problems, and should remain clear when
running with a good connection. The other alarms may light during processing,
and indicate various physical events:
Alarm Lights when this event occurs:
Loss of Signal
Total loss of signal; most likely a cabling problem (lost connection,
damaged cable, etc.).
Signal Label
Mismatch The analysis device can’t figure out the incoming signal; specifically, the
received value in the C2 octet doesn’t equal hex 13 for seven consecutive
frames. The most likely problem is a device that’s connected to an ATM
device through the wrong type of physical connection (e.g., an OC-
12c/STM-4c device cabled to an OC-3 device).
Loss Of Pointer Loss of Pointer error; i.e., there’s no valid H1/H2 pointer in the
STS-12c/STM-4c frame.
Out Of Frame Out of Frame error; i.e., the analysis device observes four consecutive in-
error A1/A2 framing patterns. The pattern observed consists of the third
A1 octet and the first A2 octet.
Loss Of Frame Loss of Frame error; i.e., the STS-OOF is active for 24 consecutive
STS-12c/STM-4c frames.
Loss Of Cell
Delineation Loss of Cell Delineation error (indicating a loss of cell synchronization).
Lights when seven consecutive HEC errors occur at the current cell-
delineation position.
Summary BIP Error Bit-Interleaved Parity check error; i.e., an error in the B1, B2, or B3 BIP-8
or BIP-24 codes at the receiver.
Line AIS Alarm Indication Signal on the line (signal is sent downstream to report an
error detected upstream). Lights after the three least significant bits of the
K2 octet are ‘111’ for five consecutive frames.
(MS-AIS = equivalent SDH term)
Line RDI RDI (Remote Defect Indicator) error on the line (signal is sent upstream to
report a receive or transmission error downstream — generally a frame-
sync error or a loss of incoming signal). Lights when the three least
significant bits of the K2 octet are ‘110’ for five consecutive frames.
(MS-RDI = equivalent SDH term)
Path AIS Alarm Indication Signal on the path; i.e., the H1 and H2 octets are all ones
for three consecutive frames.
(AIS = equivalent SDH term)
Path RDI RDI (Remote Defect Indicator) error on the path, indicating a loss of cell
delineation. Lights when the analysis device detects a value of 9 in the
most significant nibble of the G1 octet of the STS-12c/STM-4c overhead.
(RDI = equivalent SDH term)
Path FEBE Far End Block Error on the path, indicating that the block (frame) has a
checksum error. Lights when there’s a non-zero FEBE value (1–8) in the
most significant nibble of the G1 octet of the STS-12c/STM-4c overhead.
(SDH REI = equivalent SDH term)
5: Monitoring the ATM Network
5.2 Monitoring an OC-12c/STM-4c Interface
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