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Table 17: AMI HDSL Span - Maintenance

Required Tests General Information Parameters

Pulse (Attenuation) HDSL card reading at customer

premises

ADC/Pairgain

0 to -28 DB

(Each link when doublers are used.)

Adtran HDSL and HDSL2

0 to -30 DB

(Each link when doublers are used.)

Adtran HDSL4

0 to -35 dB (No regenerator or 1st link ( CO to regenerator))

0 to -31 dB (Regenerated signal 2nd link (regenerator to

premise.))

Signal to Noise Margin HDSL card reading at customer

premises

ADC/Pairgain or Adtran

6 or greater

Signal Level HDSL card reading at customer

premises

ADC/Pairgain or Adtran

0 to -7.5 DB

Note: 0 DB level may be as high as +1.6 DB

QRSS

1 five minute test

test pattern 0 errors

3 in 24

1 two minute test

test pattern 0 errors

All Ones

1 two minute test

test pattern 0 errors

On HDSL Cards:

•

Date and time must be set.

•

Actual pair loss should not exceed -35 dB at 196 kHz using a 135 # termination per link or section. This is not a

AT&T Practice ATT-TP-000-000-006

Issue 1, 08/25/06

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ADC HDSL4 Manual do Utilizador Página 27