ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance

DLP-531

Page 5 of 7

Table 531-1. HLXC Configuration Fields, continued

FIELD

TYPE

OPTIONS

DESCRIPTION

DEFAULT

 

Half AIS Feature

Toggle

ENABLED

This selection activates the Half AIS mode. An

DISABLED

 

 

 

 

Alarm Indication Signal (all 1s) is generated on

 

 

 

 

 

the outgoing DS1 path only when both HDSL

 

 

 

 

 

loops are in a LOSW (Loss of Synch Word) state.

 

 

 

 

 

In Half AIS mode when only one HDSL loop is in

 

 

 

 

 

a LOSW state, the transmitted DS1 signal will

 

 

 

 

 

continue to the payload containing transparent

 

 

 

 

 

data in the 12 channels related to the operating

 

 

 

 

 

loop. An all 1s pattern will fill the remaining 12

 

 

 

 

 

channels associated with the loop in the LOSW

 

 

 

 

 

state.

 

 

 

 

 

 

 

 

 

 

DISABLED

This selection activates the Full AIS mode. An

 

 

 

 

 

AIS signal is generated on the outgoing DS1 path

 

 

 

 

 

whenever either one or both HDSL loops are in a

 

 

 

 

 

LOSW state.

 

 

 

 

 

 

 

 

HDSL Service State

Toggle

IS (In-Service)

Allows HDSL alarms to be reported to the MPU,

OOS

 

 

 

 

and enables HDSL PM data collection. Must be set

 

 

 

 

 

to IS for reporting of equipment alarms.

 

 

 

 

 

 

 

 

 

 

OOS (Out-Of-

No HDSL alarms are reported to the MPU.

 

 

 

 

Service)

 

 

 

 

 

 

 

 

 

HDSL BER

Toggle

Enter a number from

The average Bit Error Ratios of the incoming

10-7

 

Threshold

 

10-4to 10-9

HDSL signals are monitored by the HLXC. By

 

 

 

 

 

monitoring BERs, the HLXC is capable of

 

 

 

 

 

triggering a minor alarm when any of the

 

 

 

 

 

monitored signals degrades below the BER

 

 

 

 

 

threshold level.

 

 

 

 

 

 

 

 

HDSL SNR

Toggle

Enter a number from

The lowest Signal-to-Noise Ratio allowed on the

+5 dB

 

Threshold

 

–10 dB to

HDSL loop before an alarm is triggered.

 

 

 

 

+30 dB

 

 

 

 

 

 

 

 

 

HDSL PA Threshold

Toggle

Enter a number from

The highest Pulse Attenuation value allowed on

+33 dB

 

 

 

+1 dB to

the HDSL loop before an alarm is triggered.

 

 

 

 

+40 dB

 

 

 

 

 

 

 

 

 

Network DS1 Source

Toggle

NRZ

This tells the Craft that the network DS1 source is

NRZ

 

 

 

 

at the backplane from the DS3 MUX.

 

 

 

 

 

 

 

 

 

 

BIPOLAR

This tells the Craft that network DS1 source is at

 

 

 

 

 

the Extender Card interface. If you select this

 

 

 

 

 

option when you are not using an Extender Card,

 

 

 

 

 

you will cut off the DS1 signal. See Section 4 of

 

 

 

 

 

this manual for information about the Extender

 

 

 

 

 

Card.

 

 

 

 

 

 

 

 

 

 

 

 

(continued)

2-103

© 2000, ADC Telecommunications, Inc.