Technical information

ADC Telecommunications, Inc.
236 C
HAPTER 10: PACKET OVER SONET ADMINISTRATION
Parameter Descriptions
This table provides a description of the Line window parameters.
Table 10-3 Line Window Parameters
Counter Description
Time Elapsed
Since Counters
Cleared
Time (SysUpTime) since the counters were last cleared and
reset to zero. This field shows the time in terms of
days:hours:minutes:seconds.
Transmit Errors
(Tx)
Sum of all transmit errors that caused the packet to not be
transmitted. These errors consist of tx fifo error, link layer
errors, minimum packet size violations, maximum packet
size violations and tx parity errors.
Packets with B1
Bit Errors (B1)
Number of packets received on this link with B1 bit errors.
Bit Interleaved Parity 8 is calculated over all bytes of each
frame.
Packets with B2
Bit Errors (B2)
Number of packets received on this link with B2 bit errors.
Bit Interleaved Parity 8 is calculated over all bytes of each
frame except for the first three rows of the TOH.
B2 Errors
Detected by
Remote Terminal
(M1)
Number of B2 errors that were detected by the remote
terminal in its received signal.
Rx FIFO Overflow Number of packets received on this link with an error
detected in the receive FIFO.
Rx Abort Number of packets received on this link in which the abort
sequence is detected.
Rx Giants Number of packets received on this link which are larger
than the maximum packet size.
Rx Runts Number of packets received on this link which are smaller
than the minimum packet size.
Loss of Clock
Detections (LOC)
Number of times a loss of clock has been detected. LOC
occurs if no transitions are detected on the receive SONET
clock for 16 periods of the transmit clock.
Loss of Frame
Detections (LOF)
Number of times a loss of frame has been detected. LOF
occurs if RX_OOF (out-of-frame) is active continuously for
24 consecutive frames (3 ms).
Loss of Signal
Detections (LOS)
Number of times a loss of signal has been detected. A LOS
indicates to the framer that there is no signal present from
the optical receiver.