ADTRAN E220 HFAC HDSL Severely Errored Seconds SES Alarm, Unavailable Seconds UAS Alarm

Errored Seconds Monitor Locations
		HTU-C				HRE
	ES		ES	Loop 1	ES		ES	Loop 1
	DSX-1
			C-1				H-2
					H-1
To
Network			ES	Loop 2	ES		ES	Loop 2
			C-2		H-3		H-4

Severely Errored Seconds Monitor Locations
	HTU-C			HRE
	SES		Loop 1			Loop 1
		SES		SES	SES
	DSX-1
To		C-1		H-1	H-2
Network
		SES	Loop 2	SES	SES	Loop 2
		C-2			H-4
				H-3

	HTU-R
ES		ES
R-1		DS1
ES
R-2

	HTU-R
		SES
SES		DS1
R-1
SES
R-2

To Customer

To

Customer

Unavailable Seconds Monitor Locations

					HRE
	HTU-C
	UAS	UAS	Loop 1	UAS		UAS	Loop 1
				H-1		H-2
	DSX-1	C-1
To
Network		UAS	Loop 2	UAS		UAS	Loop 2
				H-3		H-4
		C-2

HTU-R

UAS	UAS
	DS1
R-1
UAS
R-2

To Customer

Figure 4. ES, SES, and UAS Monitor Locations

Severely Errored Seconds (SES) Alarm

The locations shown in Figure 4 are monitored for Severely Errored Seconds and counts are maintained for each location. If any of these counts exceed the SES programmed threshold (see Tables 1 and 2) an alarm will be generated. This alarm threshold and the alarm type (minor or major) can be programmed by setting switches S1 and S2 (Figure 2) to the appropriate positions according to Tables 1 and 2. The alarm thresholds are for the 15-minute registers only, and the 15-minute SES counts are zeroed at each 15-minute boundary. The SES alarm threshold and alarm type can also be configured in the Craft interface Options Setup screen (see Figure 11).

Unavailable Seconds (UAS) Alarm

The locations shown in Figure 4 are monitored for unavailable seconds. Seconds and counts are maintained for each location. If any of these counts exceed the UAS programmed threshold (see Tables 1 and 2), an alarm will be generated. This alarm threshold and the alarm type (major or critical) can be programmed by setting switches S1 or S2 (Figure 2) to the appropriate positions according to Tables 1 and 2. The alarm thresholds are for the 15-minute

registers only, and the 15-minute UAS errored second counts are zeroed at each 15-minute boundary. The UAS alarm threshold and alarm type can also be configured in the Craft interface Options Setup screen (see Figure 11). Note that HDSL2 two wire units only have Loop 1.

HFAC Alarm Outputs

If an HFAC is present in the shelf, alarm outputs are available on the backplane wirewrap pins corresponding to the HFAC slot (see Figure 5). These outputs are dry contact relay connections and provide normally open, normally closed and common connection points for alarm monitoring equipment. Alarm connection points corresponding to critical major, and minor alarms (both visible and audible) are provided. These alarms are generated by the HFAC as a result of processed data collected from the HTU-Cs / H2TU-Cs.

Alarm outputs presented on these pins are programmable and can be provisioned in the HFAC Options Setup screen (see Options Setup screen), or using the HFAC dip switch settings (see Tables 1, 2, and 3). Alarm severity can be provisioned for alarms

61221051L1-5A 61221051L1-5, Issue 1 5