ADC HDSL4 Manual do Utilizador descarregar pdf (Página 36)

PA - Pulse Attenuation - See definition in Attachment 3

PM - Performance Monitoring

PROCDS - TIRKS Model

QRSS - Quasi Random Signal Sequence - test pattern r

REACT - Remote Access and Test System

SES - Severe Errored Seconds

SNR - Signal to Noise Ratio - See definition in Attachment 3

SR - Synch Readings - See definition in Attachment 3

SSIM - Special Services Installation and Maintenance

SSTC - Special Services Test Centers

STS - Synchronous Transport Signal

WFA/C - Work Force Administration / Control

WORD - Work Order Record Detail

8. Attachment 3 - HDSL TERMINOLOGY AND DEFINITIONS

•

AML - Actual Measured Loss; The loss measured (35 dB max) using two test sets at 196 kHz with 135 ohms

terminations on both ends of an HDSL span section ( CO to Remote, CO to Repeater, Repeater to Remote, or

Repeater to Repeater in the form of 4W-HDSL ). AML can also be the measurement made by the HDSL equip-

ment when using a laptop or dumb terminal device in the RS232 jack on the face of the units.

•

BT - Bridged Tap; Any section of a cable pair not on the direct electrical path between the central office and the

end user. (A bridged tap increases the electrical loss on the pair - because a signal traveling down the pair will

split its signal between the bridge and main pairs).

HDSL BT parameters:

•

Total bridged tap length on any HDSL span may not exceed 2.5 kft.

•

No single bridged tap section may exceed 2.0kft. on any HDSL span.

•

All 26 gauge cable plus bridged tap, may not exceed 9kft

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

Issue 1, 08/25/06

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ADC HDSL4 Manual do Utilizador Página 36