Skip to main content
Log in

Internet phone — changing the telephony paradigm?

  • Published:
BT Technology Journal

Abstract

This paper provides an overview of the history, current status, and underlying technology of ‘Internet telephony’ — the transport of speech information over a packet-switched connectionless network. The economics of Internet telephony and a number of possible system architectures for interconnection with the switched telephone network are examined. The paper concludes with a look at the quality of service issues raised by Internet telephony.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Subscribe and save

Springer+ Basic
EUR 32.99 /Month
  • Get 10 units per month
  • Download Article/Chapter or Ebook
  • 1 Unit = 1 Article or 1 Chapter
  • Cancel anytime
Subscribe now

Buy Now

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. O'Neill A: ‘Internetwork futures’, BT Technol J, 15,No 2, pp 226–240 (April 1997).

    Google Scholar 

  2. Cohen D: ‘Specifications for the network voice protocol NVP’, IETF RFC741 (22 November 1977).

  3. ‘Visual telephone systems and equipment for local area networks which provide a non-guaranteed quality of service’, ITU-T Recommendation H.323 (January 1997).

  4. Thom GA: ‘H.323: the multimedia communications standard for local area networks’, IEEE Communications Magazine (December 1996).

  5. Cox R V and Kroon P: ‘Low bit rate speech coders for multimedia communication’, IEEE Communications Magazine (December 1996).

  6. ‘Numbering plan for the ISDN Era’, ITU-T Recommendation E.164/I.331 (August 1991).

  7. ‘Mixed excitation linear predictive coder MELP’, Atlanta signal processors Inc, http://www.aspi.com/products/melp.htm

  8. Mouly M and Pautet M B: ‘The GSM system for mobile communications’, Europe Media Duplication 1993.

  9. Wong W T K et al: ‘Low rate speech coding for telecommunications’, BT Technol J, 14,No 1, pp 28–44 (January 1996).

    Google Scholar 

  10. Office of Technology and Standards: ‘Telecommunications: analog to digital conversion of radio voice by 4,800 bit/second code excited linear prediction (celp)’, Federal Standard FS-1016 (1990).

  11. Schulzrinne H, Casner S, Frederick R and Jacobson V: ‘RTP: a transport protocol for real-time applications’, IETF RFC 1889 (25 January 1996).

  12. Rudkin S, Grace A P and Whybray M W: ‘Real-time applications on the Internet’, BT Technol J, 15,No 2, pp 209–225 (April 1997).

    Google Scholar 

  13. Hardman V, Sasse M A, Handley M and Watson A: ‘Reliable audio for use over the Internet’, http://info.isoc.org/HMP/PAPER/070/abst.htm

  14. University College, London: ‘MICE multimedix index’, http://www-mice.cs.ucl.ac.uk/mice/

  15. Floyd S and Jacobson V: ‘Random early detection gateways for congestion avoidance’, IEEE/ACM Trans on Networking, 1,No 4 (August 1993).

Bibliography

  1. http://www.vocaltec.com

  2. http://www.netspeak.com

  3. http://www.net2phone.com (IDT)

  4. http://www.von.com

  5. http://andrew2.andrew.cmu.edu/rfc/rfc-index.html

  6. http://rpcp.mit.edu/~itel/resource.html

  7. http://www.pulver.com

Download references

Author information

Authors and Affiliations

Authors

About this article

Cite this article

Babbage, R., Moffat, I., O'Neill, A. et al. Internet phone — changing the telephony paradigm?. BT Technology Journal 15, 145–157 (1997). https://doi.org/10.1023/A:1018601211460

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1023/A:1018601211460

Keywords

Navigation