T1/E1 statistics and performance measures

TxT1E1CarrierStatus returns the statistics for the current 15 minute interval and the current 24 hour interval. To obtain a full performance report for the previous 96 15 minute intervals plus the 24 hour summary totals, call TxT1E1PerfReport.

The application can also use TxT1E1SuperviseCarrier to request performance reports automatically every 15 minutes or every 24 hours. Performance reports are returned to the application in the form of unsolicited messages using the same TX device driver interface as the unsolicited status and alarm messages.

Event counters and performance measures

The Signaling software maintains event counters and performance measures. Event counters are 16-bit accumulators that are reset only upon request from the host application. Performance measures are counts maintained for:

Event counters

The following table lists the event counters:

TR 54016 name

RFC 1406 name

Description

ESF error event

Path code violation

Accumulated frame synchronization or CRC error.

Error event

N/A

Line code violation, accumulated bipolar violation, or excessive zeroes error.

Controlled slip

Controlled slip (CS)

Accumulated replication or deletion of received frames due to timing slips.

E-bit error event

N/A

Number of E-bit errors (CRC errors) reported back by far end through CRC4 multiframe E-bit indicator.


Performance measures

The following table lists the performance measures (all counts are relative to a 15 minute interval):

TR 54016 name

RFC 1406 name

Description

Errored seconds (ES)

Errored seconds (ES)

Number of seconds (0 through 900) with one or more CRC/frame synchronization errors, out-of-frame declarations, or controlled slips.

N/A

Line errored seconds

Number of seconds (0 through 900) with one or more line code violations.

Bursty errored seconds (BES)

Bursty errored seconds (BES)

Number of seconds (0 through 900) with (BES) 1 < path code errors < 320.

Severely errored seconds (SES)

Severely errored seconds (SES)

Number of seconds (0 through 900) with path code errors greater than or equal to 320.

Controlled slip seconds

Controlled slip seconds

Number of seconds (0 through 255) with one or more controlled slips.

Loss of frame count

N/A

Number of out-of-frame defects declared (0 through 255).


The current interval counts and the previous 96 interval counts are available on request from the host application. The following RFC 1406 (DS1/E1 MIB) measures are not explicitly supported: