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IDSL Last modified: Monday, July 28, 2003

Short for ISDN Digital Subscriber Line, a method of providing DSL technology over existing ISDN lines. Even though the transfer rates for IDSL are about the same as ISDN (144kbps v. 128kbps), and IDSL circuits typically only carry data (not voice), the major benefits of switching to IDSL from ISDN are always-on connections, thus eliminating call setup delays; flat rate billing, instead of per minute fees; and transmission of data over the data network, rather than the PSTN. IDSL was developed by Ascend Communications, now part of Lucent Technologies. Sponsored listings AT&T Business Solutions - The Information You Need to Start, Manage, Move & Grow Your Business. AT&T Tech Support 360 - Save Time and Money for your Small Business with 24/7 AT&T Tech Support. Now Is A Great Time to Switch and Save - Get the Charter Business BundleŽ and save over 40%* off standard monthly rates when you order Internet, Telephone and Cable TV.