Station-Generated Impulse Noise and Its Effects on a T1 Carrier Signal,

Abstract

Studies dating back to 1963 emphasize the importance of considering the effects of impulse noise coupled by near end crosstalk (NEXT) as a predominant source of digital transmission error in T1 systems. Relays and switches, rectifier power supplies, ac power wiring, lines carrying test tons, and ringing generators in central offices and remote terminals have all been implicated as impulse noise sources. This study demonstrates that station-generated impulse noise can also be a problem. For instance, when the ringing signal is interrupted on a voice pair in the same cable, the disturbances can be at least 20 dB stronger than intersystem NEXT. While such strong impulses are infrequent, they may be of concern as the DS1 service to customer premises continues to expand. A simple, parallel R-L filter placed in series with a standard telephone set effectively reduce errors in the transmitted data. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1986
Accession Number
ADP005255

Entities

People

  • J. B. Haber

Tags

DTIC Thesaurus Topics

  • Co-Channel Interference
  • Communication Terminals
  • Generators
  • Impulse Noise
  • Noise
  • Power Supplies
  • Rectifiers
  • Remote Terminals
  • Standards
  • Terminals

Readers

  • Auditory Neuroscience/Auditory Physiology.
  • Electrical Engineering
  • Radio communications and signal processing.