VC-n performance parameters

Overview

This section describes the terminated SDH VC performance monitoring parameters. Terminated SDH VC path performance monitoring applies to all supported VC paths.

Monitored parameters

The following table lists the SDH VC 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 5-69: SDH VC performance parameters

Facility	Measured Provisionable Parameter	15-Min		1-Day
Facility	Measured Provisionable Parameter	Default	Range¹	Default	Range¹
VC-4-4c	Positive Pointer Justification Counts (PPJC-PDET)	30	0–1800000	2800	0–172800000
	Negative Pointer Justification Counts (NPJC-PDET)	30	0–1800000	2800	0–172800000
	Background Block Errors - Path (BBE-P)	75	0–16383	750	0–1048575
	Errored Seconds - Path (ES-P)	60	0–900	600	0–65535
	Severely Errored Seconds - Path (SES-P)	3	0–900	7	0–65535
	Unavailable Seconds - Path (UAS-P)	10	0–900	10	0–65535
VC-4	Positive Pointer Justification Counts (PPJC-PDET)	30	0–1800000	2800	0–172800000
	Negative Pointer Justification Counts (NPJC-PDET)	30	0–1800000	2800	0–172800000
	Background Block Errors - Path (BBE-P)	25	0–16383	250	0–1048575
	Errored Seconds - Path (ES-P)	20	0–900	200	0–65535
	Severely Errored Seconds - Path (SES-P)	3	0–900	7	0–65535
	Unavailable Seconds - Path (UAS-P)	10	0–900	10	0–65535
VC-3	Background Block Errors - Path (BBE-P)	15	0–16383	125	0–1048575
	Errored Seconds - Path (ES-P)	12	0–900	100	0–65535
	Severely Errored Seconds - Path (SES-P)	3	0–900	7	0–65535
	Unavailable Seconds - Path (UAS-P)	10	0–900	10	0–65535
VC-12 Path	Background Block Errors - Path (BBE-P)	75	0–16383	750	0–1048575
	Errored Seconds - Path (ES-P)	40	0–900	900	0–65535
	Severely Errored Seconds - Path (SES-P)	40	0–900	900	0–65535
	Unavailable Seconds - Path (UAS-P)	40	0–900	900	0–65535

Notes:

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

VC-n path parameters

Positive pointer justifications counts detected (PPJC-PDET)

This parameter summarizes all Positive Pointer Justifications detected by the system. Alcatel-Lucent 1850 TSS-5 monitors positive line Pointer Justifications on a VC-4 in 1 second intervals. (Users may select which VC-4 or VC-4-4c to monitor by provisioning the PJC Monitoring point parameter using the Performance → Provision PM command.) The count increments for each incoming positive pointer justification.

Negative pointer justifications counts detected (NPJC-PDET)

This parameter summarizes all Negative Pointer Justifications detected by the system. Alcatel-Lucent 1850 TSS-5 monitors negative line Pointer Justifications on a VC-4 in 1 second intervals. (Users may select which VC-4 or VC-4-4c to monitor by provisioning the PJC Monitoring point parameter using the Performance → Provision PM command.) The count increments for each incoming negative pointer justification.

Background block errors (BBE-P)

The Near-End VC-n Background Block Errors (BBE-P) parameter for each VC-3 (low-order), VC-4, VC-4-4c, and VC-12 Path is monitored. The number of Near-End BBE-Ps in a one second period is equal to the Near-End EBC if the second is not a Near-End SES. Otherwise, the BBE-P is set to zero for that second.

Errored seconds (ES-P)

The Near-End VC-n Errored Seconds (ESP) parameter for each for each VC-3 (low-order), VC-4, VC-4-4c, and VC-12 Path is monitored. A Near-End VC-n ES parameter increments for each second in which there is one or more N_Bs (detected at the Low Order Path Layer) or a N_DS defect is present.

ITU-T standards refers to this parameter as N_ES, but for consistency within the Alcatel-Lucent 1850 TSS-5 product, this parameter is referred to as ES with a locn value of NEND to indicate that it is the Near-End Errored Seconds.

Severely errored seconds (SES-P)

The Near-End VC-n Severely Errored Seconds (SESP) parameter for each for each VC-3 (low-order), VC-4, VC-4-4c, and VC-12 Path is monitored. An Near-End VC-n SES parameter increments for each second in which the N_EBC is equal to or greater than a hard-coded value, or an N_DS defect is present. The integer hard-coded threshold is shown in Table 5-69, SDH VC performance parameters. ITU-T standards refers to this parameter as N_SES, but for consistency within the Alcatel-Lucent 1850 TSS-5 product, this parameter is referred to as SES with a locn value of NEND to indicate that it is the Near-End Severely Errored Seconds parameter.

Unavailable seconds (UAS-P)

The Near-End VC-n Unavailable Seconds (UASP) parameter for each VC-3 (low-order), VC-4, VC-4-4c, and VC-12 Path is monitored. The Near-End VC-n UAS parameter increments once for every second that the Low Order Path was considered unavailable (at any point during the second). A Low Order Path becomes unavailable at the onset of 10 consecutive seconds that qualify as Near-End VC-n SESP, and continues to be unavailable until the onset of 10 consecutive seconds that do not qualify as Near-End VC-n SES.

The (un)available time can not be determined if it is unknown whether the previous 10 seconds are Severely Errored on non-Severely Errored. Thus the SES must be processed to determine whether the SES are consecutively present or absent. ITU-T standards refers to this parameter as N_UAS, but for consistency within the Alcatel-Lucent 1850 TSS-5 product, this parameter is referred to as UAS with a locn value of NEND to indicate that it is the Near-End Unavailable Seconds.