VT1.5 performance parameters

Overview

This section describes the terminated SONET VT1.5 performance monitoring parameters. Terminated SONET VT1.5 path performance monitoring applies to VT1.5 paths cross-connected to a non-SONET interface (for example, DS1).

Monitored parameters

The following table lists the SONET VT1.5 path performance parameters that Alcatel-Lucent 1850 TSS-5 monitors, including the default and ranges for the 15-minute and 1-day (24-hour) registers.

Table 5-68: SONET VT1.5 performance parameters

Facility	Measured Provisionable Parameter	15-Min		1-Day
		Default	Range 1	Default	Range 1
VT1.5 Path	V5 Errored Seconds (ES-P)	40	0–900	900	0–65535
	V5 Severely Errored Seconds (SES-P)	40	0–900	900	0–65535
	V5 Unavailable Seconds (UAS-P)	40	0–900	900	0–65535

Notes:

1. When an individual performance monitoring parameter threshold is provisioned as zero (0), TCA reporting for the affected parameter is disabled.

VT1.5 path parameters

Alcatel-Lucent 1850 TSS-5 monitors the following near end SONET VT1.5 path parameters on incoming (from the SONET interface) VT1.5 signals.

Errored seconds (ES-P)

The Near-End STS Path Errored Seconds (ESP) parameter for each SONET path is monitored. The ESP parameter increments once for each second where one or more STS Path layer BIP errors are detected or an AIS-P, LOP-P, or UNEQ-P defect is detected. BIP errors are not monitored for VTs.

Severely errored seconds (SES-P)

The Near-End STS Path Severely Errored Seconds (SESP) parameter for each SONET path is monitored. The SESP parameter increments once for each second where 15 or more STS Path layer BIP errors are detected or an AIS-P, LOP-P, or UNEQ-P defect is detectedAlcatel-Lucent 1850 TSS-5 detects 1-bit RDI, but treats it as though it is the high order bit of a 3-bit ERDI in that it includes UNEQ.

Unavailable seconds (UAS-P)

The Near-End STS Path Unavailable Seconds (UASP) parameter for each SONET path is monitored. The UASP parameter increments once for each second where SESP is detected after ten consecutive seconds with SESP detected. UASP continues to increment once for each second until ten consecutive seconds without SESP are detected.