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ISDN
ADSL
B-channel
BRI
broadband ISDN (B-ISDN)
channel bonding
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fiber optics
Group 4 protocol
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Abbreviation of integrated services digital network, an international communications standard for sending voice, video, and data over digital telephone lines. ISDN requires special metal wires and supports data transfer rates of 64 Kbps (64,000 bits per second). Most ISDN lines offered by telephone companies give you two lines at once, called B channels. You can use one line for voice and the other for data, or you can use both lines for data to give you data rates of 128 Kbps, three times the data rate provided by today's fastest modems.

The original version of ISDN employs baseband transmission. Another version, called B-ISDN, uses broadband transmission and is able to support transmission rates of 1.5 Mbps. B-ISDN requires fiber optic cables and is not widely available.


More Information

Outstanding Page ISDN modem reviews - article
CNET article (May 14, 1997) on their review of 22 ISDN modems. Included are their recommendations, performance results, and what to look for when buying an ISDN modem. This article also contains a guide to ordering ISDN in your area (and how much you can expect to pay), information about ISDN PCMCIA card products, and competing technologies. Updated on Aug 4, 1998

Outstanding Page ISDN newsgroup FAQ
These questions and answers are from the newsgroup comp.dcom.isdn. Here you can find information on what ISDN is, what the network looks like, telephone service issues, and technical information on products and equipment. Updated on Aug 2, 1998

Outstanding Page ISDN User's Guide
From Pacific Bell, this page provides links to the ISDN User's Guide table of contents. Some sections include: ISDN fundamentals, use in applications,and types of services and connections.

Outstanding Page White paper on ISDN and data networking
This paper, from 3Com, presents an overview of narrowband ISDN technology and reports on its current deployment status worldwide. Updated on Jun 14, 1998

  Asuscom Network home page
Provides information on ISDN products, including ISDN NT1, and ISDN PC adapter products.

  Axio Systems home page
Contains links to ISDN and videoconferencing products from Axio Systems. Updated on Jun 6, 1998

  Broadcast ISDN User Group and Directory
Offers links to many ISDN resources, including background information, Web links, user group directories, telecom information, and news. Updated on Aug 1, 1998

  Data TeleMark ISDN
Provides company and product information for Data TeleMark, a manufacturer and systems integrator for wireless ISDN and ISDN encryption. Updated on Aug 5, 1998

  IETF ISDN Working Group Charter
Describes the IETF ISDN working group and includes contact and mailing list information and links to Internet draft documents. Updated on Aug 2, 1997

  Installing ISDN
Explains how to upgrade to ISDN. Updated on Aug 4, 1998

  ISDN D Channel Packet - white paper
Motorola white paper on a hybrid service called D Channel Packet which uses ISDN and X.25. Updated on Jun 13, 1998

  ISDN Primer
This technology brief, from Interforce Information, provides a graphic of bandwidth technologies, as well as a comprehensive introduction to ISDN.

  ISDN tutorial and resources
Covers the basics of ISDN along with sections on history, advantages, interfaces, and links to Web references and sources. Updated on Aug 1, 1998

  Microsoft's ISDN page
Explains the basics of ISDN with sections on software, hardware and services as well as a glossary of ISDN-related terms and links to related Web sites.

  National ISDN Council
Provides information on the activities and involvements of the National ISDN Council, a forum of telecommunications service providers supporting the development of ISDN services on a nationwide basis.

  North American ISDN Users Forum (NIUF)
The purpose of the NIUF is to create a strong user voice in the implementation of ISDN applications. Here you can read about this organization and their working groups, applications, documentation, and meetings, as well as links to other ISDN resources. Updated on Mar 26, 1998

  Paper on Broadband ISDN
This paper provides an introduction to ISDN and information on general structure, channels, rate interfaces and the future of B-ISDN. Updated on Nov 3, 1997

  Paper on NetBIOS and ISDN
This paper, from ExcellTECH, describes the advantages of using NetBIOS APIs with ISDN terminal adapters. Updated on Dec 19, 1997

  SPID Simplification
Describes the process for assigning SPIDs, published by the National ISDN Council, an industry consortium dedicated to promoting ISDN usage. Updated on Aug 5, 1998

  TeleSoft ISDN products
Corporate site forTeleSoft International, Inc., developer and supplier of ISDN, X.25, and Frame Relay technology products.

  The North American ISDN Users' Forum
Home page of the North American ISDN Users' Forum, whose purpose is to create a strong user voice in the implementation of ISDN applications.There are many organization related links, as well as general information on ISDN. Updated on Mar 26, 1998

  WAN Buyer's Directory
LAN Times site with information on a variety of WAN products. The directory features CSU/DSU hardware, frame relay hardware, ISDN modems, and routers from leading vendors.

  Yahoo!'s ISDN consulting page
Yahoo!'s directory of links to organizations offering ISDN consulting, training, and related services. Updated on Aug 4, 1998

  Yahoo!'s ISDN networking page
Yahoo!'s directory of ISDN networking. Updated on Aug 2, 1998

  Yahoo!'s ISDN page
Yahoo!'s directory of ISDN links. Updated on Aug 4, 1998

  Yahoo!'s ISDN peripherals buyer's guides page
Yahoo!'s directory of buyer's guides for ISDN peripherals. Updated on Aug 4, 1998

  Yahoo!'s ISDN user group page
Yahoo!'s directory of ISDN user groups. Updated on Aug 4, 1998

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