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Closing the Loop

  • Bernhard E. Keiser
  • Eugene Strange

Abstract

The copper-loop environment is discussed in detail in Section A.3.1.1. Guidelines, developed in the 1980s for Carrier Serving Areas (CSA), produced excellent results for analog services. Additional study was needed, however, to ascertain the extent to which Basic Rate Access (BRA) ISDN could be deployed over copper loops. It was found that about 25% of all copper loops could not carry the required 160 kb/s because of loading coils installed in the loops. It also was found that about 48% of the sampled loops were compatible with CSA guidelines. Other loops in a CSA extend far beyond the maximum guideline length and are provided with Digital Loop Carrier (DLC) in the feeder portion. A Feeder Distribution Interface (FDI) is connected on the subscriber side of the DLC Remote Terminal (RT) and is designed to serve 400 to 600 subscribers.

Keywords

Time Slot Central Office Optical Network Unit Broadband Service Decision Feedback Equalizer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Generic Requirements for High-Bit-Rate Digital Subscriber Lines, Bellcore TA-NWT001210, Issue 1, October 1991, p. B-21.Google Scholar
  2. 2.
    Ibid., p. 3–2.Google Scholar
  3. 3.
    Ibid., Appendix B.Google Scholar
  4. 4.
    Lawrence, R. W., “Switched Simplex High Bit Rate Services in Today’s Residential Environment,” ICC ‘82 Conference Record, Vol. 4, p. 211.1.3.Google Scholar
  5. 5.
    Fleischer, P. E., Lau, R. C., Lukacs, M. E., “Digital Transport of HDTV on Optical Fiber,” IEEE Communications Magazine, August 1991, pp. 36–41.Google Scholar
  6. 6.
    Sibley, L. A., “The State of the Network-1992,” ICC ‘82 Conference Record, Vol. 4, pp. 207.1.1–207.1.4.Google Scholar
  7. 7.
    “Copper’s high-speed hurdles,” Bellcore Exchange, March/April 1992, p. 5.Google Scholar
  8. 8.
    “On copper and glass,” Bellcore Exchange, March/April 1992, p. 2.Google Scholar
  9. 9.
    TA-NWT-001210, Section 2.Google Scholar
  10. 10.
    TA-NWT-001210, p. 4–1.Google Scholar
  11. 11.
    Jones, D. C., “A New Parallel Adaptive Digital Filter Architecture for High Speed Digital Subscriber Line Application,” GLOBECOM ‘81 Conference Record, Vol. 3, pp. 56.6.1–56.6.5.Google Scholar
  12. 12.
    Lawrence, R. W., pp. 211.1.1–211.1.6.Google Scholar
  13. 13.
    Bell Atlantic Seminar, Baltimore, MD, October 2, 1992.Google Scholar
  14. 14.
    Lawrence, R. W., p. 211.1.4.Google Scholar
  15. 15.
    Ibid., pp. 211.1.5–211.1.6.Google Scholar
  16. 16.
    Waring, D. L., “The Asymmetrical Digital Subscriber Line (ADSL): A New Transport Technology for Delivering Wideband Capabilities to the Residence,” GLOBECOM ‘81 Conference Record, Vol. 3, pp. 56.3.1–56.3.8.Google Scholar
  17. 17.
    Sistanizadeh, K., “Spectral Compatibility of Asymmetrical Digital Subscriber Lines (ADSL),” GLOBECOM ‘81 Conference Record,Vol. 3, pp. 56.1.1–56.1.5.Google Scholar
  18. 18.
    Ahamed, S. V., et al., “A Tutorial on Two-Wire Digital Transmission in the Loop Plant,” IEEE Transactions on Communications, November 1981, pp. 1561–1562.Google Scholar
  19. 19.
    Barton, M., “On the Performance of an Asymmetrical Digital Subscriber Lines QAM Transceiver,” GLOBECOM ‘81 Conference Record, Vol. 3, pp. 56.7.1–56.7.5.Google Scholar
  20. 20.
    “Why DMT Should be Chosen for ADSL Now,” T1E1.4 submission by Amati Communications Corp., T1E1.4/93–018, March 8, 1993.Google Scholar
  21. 21.
    Stephens, W. E., et al., “Transmission of STS-3c (155 Mbit/sec) SONET/ATM Signals over Unshielded and Shielded Twisted Pair Copper Wire,” GLOBECOM ‘82 Conference Record,pp. 6.6.1–6.6.5.Google Scholar
  22. 22.
    Additional Cable Specifications for Unshielded Twisted Pair Cables,EIA/TIA/TSB36, November 1991.Google Scholar
  23. 23.
    Generic Requirements and Objectives for Fiber In The Loop Systems,Bellcore TANWT-000909, Issue 1, December 1990, pp. 2.1–2.5.Google Scholar
  24. 24.
    Optical Source Module for Fiber In The Loop (FITL) Systems,Bellcore TA-NWT000786, Issue 2, December 1991, pp. 7–8.Google Scholar
  25. 25.
    TA-NWT-000909, Issue 1, pp. 2.13–2.14.Google Scholar
  26. 26.
    Ibid., pp. 2.5–2.8.Google Scholar
  27. 27.
    Ibid., pp. 2.41–2.45.Google Scholar
  28. 28.
    Ibid., pp. 2.24–2.26.Google Scholar
  29. 29.
    Keiser, B. and Strange, E., Digital Telephony and Network Integration,First Edition, Van Nostrand Reinhold, p. 416.Google Scholar
  30. 30.
    Goarin, R., “Component Reliability Results from the Biarritz Field Trial and from ”Plan Cable“ Volume Deployment,” GLOBECOM ‘81 Conference Record, Vol. 1, Dec. 1991, pp. 17.1.1–17.1.6.Google Scholar
  31. 31.
    Balmes, M., Bourne, J., and Mar, J., “The Technology Behind Heathrow,” Telesis, 1989 two, pp. 31–41.Google Scholar
  32. 32.
    Generic Criteria for Version 0.1 Wireless Access Communications Systems (WAGS),Bellcore TA-NWT-001313, Issue 1, July 1992, pp. 1–4.Google Scholar
  33. 33.
    Ibid., p. 19.Google Scholar
  34. 34.
    Ibid., Section 5.Google Scholar
  35. 35.
    Ibid., Section 6.Google Scholar
  36. 36.
    Ibid., Section 7.Google Scholar
  37. 37.
    Rosenberg, J., “Multimedia delivery over public switched networks,” Bellcore Exchange, January 1993, pp. 20–24.Google Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Bernhard E. Keiser
  • Eugene Strange

There are no affiliations available

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