The date and time when the associated measurement counters are cleared or the DS1 Converter facility is administered. The counters are set to 0 and start accumulating data when the system is administered or re-initialized. The system displays the current system time in this field after the system clock is set. Since the Counted Since field is calculated based on the current time, an error message is prompted back to you if the system clock is not set following a system re-initialization.

The total number of 15-minute intervals (0 to 96) in the past 24-hour period that contain valid data.

The Valid Interval field indicates whether or not a valid count is provided by the DS1 interface media module. A value ofyindicates that all counts are valid for the interval. A value ofn

indicates that the interval is invalid.

An invalid interval is any 15-minute time interval during which the system clock is changed, a system re-initialization occurred, or the specified media module is pulled from the carrier.

The number of seconds (0 to 899) counted in the current 15-minute interval.

The number of ESF errors (CRC-6 errors or out-of-frame errors) counted with a maximum cumulative value of 65535.

The type of DS1 loopback/span test currently active. None indicates no test is currently active.

The type of bit pattern generated during an extended duration DS1 loopback/span test. None indicates that no pattern is being sent.

Indicates whether the test pattern being generated by the DS1 board is synchronized (detected properly by the receiving DS1 media module). N/A is displayed if no pattern is generated.

The number of bit-errors detected in the received signal when an extended duration loopback test is performed.

The duration in seconds the extended loopback test runs. The maximum value is 99:59:59 (99 hours, 59 minutes, and 59 seconds).

The type of error to which the count applies (errored seconds, bursty errored seconds, severely errored seconds, unavailable/failed seconds, controlled slip seconds, and loss of frame count).

The date, ending time, and count for the 15-minute period that contains the maximum value for each error category. If there are no errors, the field displays 0 with the most recent interval, or N/A if no data is collected.

The total count in each error category for the last 24-hour period (0 to 65535 — counts greater than 65535 are still displayed as 65535).

The count so far in each category for the 15-minute interval in progress when the report is requested. If no errors have occurred yet in any of the categories during the current 15-minute interval, the respective field contains the number 0. If the system is busy performing call processing functions and cannot respond within 8 seconds, then the field displays N/A.

The time and date of the current report.

The start time and date when the associated measurement counters are cleared or the DS1 Converter facility is administered.

The date and end time of the 15-minute interval.

Errored Seconds.The number of the errored seconds for the specified 15-minute interval (maximum of 900). An errored second is any second in which one or more data transmission errors occurred. N/A indicates the count for that interval is not available.

Bursty Errored Seconds.The number of bursty errored seconds for the specified interval (maximum of 900). A bursty errored second is any second in which 2 to 319 data transmission errors occurred. N/A indicates the count for that interval is not available. An error count of this severity results in a minor alarm.

Suggested action: Resolution of the alarm should, in most cases, be the function of maintenance personnel. Depending upon local arrangements, it might be appropriate to alert maintenance personnel if they have not already been alerted.

Severely Errored Seconds.The number of the severely errored seconds counter for the specified interval (maximum of 900). A severely errored second is any second in which 320 or more data transmission errors occur. N/A indicates the count for that interval is not available. An error count of this severity results in a major alarm.

Suggested action: Resolution of the alarm should, in most cases, be the function of maintenance personnel. Depending upon local arrangements it might be appropriate to alert maintenance personnel, if they have not already been alerted.

The value of the unavailable or failed seconds counter for the specified interval (maximum of 900). A failed second state exists any time that 10 or more consecutive severely errored seconds occur. An error count of this severity results in a major alarm. N/A indicates the count for that interval is not available.

Suggested action: Resolution of the alarm should, in most cases, be the function of maintenance personnel. Depending upon local arrangements, it might be appropriate to alert maintenance personnel, if they have not already been alerted.

Controlled Slip Second. Any second with one or more controlled slips (a replication or deletion of a DS1 frame by the receiver).

Loss of Frame Count. The number of times a loss of frame is declared. A loss of frame is declared when there is a continuous loss of signal or out of frame condition for greater than 2.5 seconds.