ADC Release 3.1 User Manual
Page 170
1152700
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Issue 1
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February 2001
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Section 2 Operation and Maintenance
Page 2-150
2000, ADC Telecommunications, Inc.
DLP-727
Page 4 of 4
Table 727-1. T3 TMUX Multi 1 Performance Monitoring Values, continued
MONITOR TYPE
MAX 15 MIN.
THRESH
COMMENTS
AAL1 LAYER
Stuffing Cells
9900
Indicates a count of AIS cells inserted into the data stream for stuffing
purposes in a 15-minute interval.
Congestion Lost
Cells
7391440
Indicates a count of cells discarded in a 15-minute interval.
AAL1 Sequence
Errors
3695745
A count of “Out of Sequence” transitions in a 15-minute interval.
Lost Cells
3695745
A count of cells lost in a 15-minute interval.
Buffer Overflow
900
Indicates a count of buffers that have overflowed in a 15-minute period.
Buffer Underflow
900
Indicates a count of buffers that have underflowed in a 15-minute
period.
ATM / TC LAYER
Suspect
1
Suspect defines counts that are suspected to have errors but may have
been reset to zero by a user during the reporting period.
Supp
3695745
Suppressed intervals flag indicates that there was no data to report for
an interval (all counts are zero). This saves the user from having to
look at a bunch of zeros and also reduces the size of the PM data files.
Hdr Errs
3695745
Sets a count of errors in the ATM header that the system can incur
before notifying the system administrator.
OAM Rcvd
3695745
A count of Operation, Administration, and Maintenance cells received
in a 15-minute period. These cells are used for testing purposes such as
loopback request codes.
In Cells
3695745
A total count of all of the cells that have been received on an interface.
This is for user information and not configurable.
Out Cells
3695745
A total count of all of the cells that have been transmitted out from an
interface. This is for user information and is not configurable.
HEC Viols
3695745
Sets a count of Header Error Checksum violations that the system can
incur before declaring an alert.
OCDs
900
Sets a count of Out of Cell Delineation anomalies that the system can
incur before declaring an alert.
Note: Max value should be the number of cells received in a 15-minute period (or for
Congestion Lost Cells, multiply this by 2). Although 31 or 32 bits are allocated, only
4106.38 cells/sec are received on a T1. In a 15-minute period (900 seconds) only
3695744.68 cell are received. Therefore the max value for all AAL1 sequence errors for
a 15-minute period should be 3695745 (22 bits), and for Congestion Lost cells 7391440
(23 bits).