ISDN Last modified: Monday, July 28, 2003
Abbreviation of integrated services digital network, an international communications standard for sending voice, video, and data over digital telephone lines or normal telephone wires. ISDN supports data transfer rates of 64 Kbps (64,000 bits per second). There are two types of ISDN: Basic Rate Interface (BRI) -- consists of two 64-Kbps B-channels and one D-channel for transmitting control information. Primary Rate Interface (PRI) -- consists of 23 B-channels and one D-channel (U.S.) or 30 B-channels and one D-channel (Europe). 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.
•E-mail this definition to a colleague• Sponsored listings AT&T Enterprise Business Solutions - Local, National or Global Business? AT&T Can Provide Network Solutions. T1 Internet Provider - Los Angeles - Serving Los Angeles, Orange, Riverside, and San Bernardino counties only. Trusted by major corporations for its network performance and service. Business Broadband T1 and DS1 lines - We offer unlimited consulting at no cost to insure you get the plan that best fits your needs. Compare prices from the major T1 service providers. For internet.com pages about ISDN . Also check out the following links! Byte article on how the Internet will replace broadcasting  A February 1996 article that discusses ISDN and MPEG mechanics as handled via Internet Web servers. Dan Kegel's ISDN page  This user page provides numerous links to many aspects of ISDN. Sample categories include: informational (what is ISDN?) , latest news, product development, company information, software and hardware, ISDN service providers, and links to additional Web resources. Installing ISDN Explains how to upgrade 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. PC communications over modems and ISDN This article, from August 1996, describes serial ports, introduces the most general and least expensive ISDN equipment, and provides an outline of the steps to exploit this new service. Yahoo!'s ISDN Page Yahoo!'s directory of ISDN links. Yahoo!'s ISDN user group page Yahoo!'s directory of ISDN user groups. Sponsored listings Comcast Business Class - Sign Up For Business Class & Save At Least 22% - Find Out More Now Fax Broadcasting Software - Compare Fax Server Software using Capterra's free, comprehensive directory. Fax Server Software - Send & receive faxes from any computer. Archive and email faxes from a single control panel. Sign up now. Fax Software - Offers OmniRush integrated network faxing software for CRM users, GoldMine and MS CRM. ISDN Voice Over Studio - On hold, narration, dubbing, jingles, imaging, audio books, lip sync, commercial voice overs, audio navigations. 30 languages supported, FTP delivery.	Data Transfer Rates ISDN ADSL ANI B-channel BRI broadband ISDN (B-ISDN) channel bonding D-channel DirecPC FDDI fiber optics G.SHDSL Group 4 protocol IDSL MLPPP MP NDIS PRI SDSL SPID terminal adapter xDSL Give Us Your Feedback Shopping ISDN Products Compare Products,Prices and Stores Shop by Category: Routers 117 Model Matches Modems 215 Model Matches Expansion Modules 61 Model Matches