DSL ISPs Cable Companies Dialup Internet Service Providers
The high-speed competition
Some non-competitors
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ISDN
Cost Internal ISDN terminal adapters are available for as little as $100. External units cost as little as $200. ISDN routers and bridges - network devices that can connect a network of computers to ISDN - start at about $500. ISDN phone rates vary geographically. Here in Tennessee, unlimited residential usage is about $30 a month. In some states, unlimited usage is two or three hundred dollars a month. Less costly options in these states start at around $30 per month, but incur additional hourly charges that depend on the time of day and whether you're using one or both B channels. These sorts of complications have made ISDN more difficult than it needs to be. To inquire about local rates, look in the front of your local telephone directory for an information number. ISP rates for ISDN are in the same ballpark as modem rates. In fact, some ISPs offer ISDN access for exactly the same cost as modem access. Speed Consumer ISDN (Basic Rate Interface, or BRI) has two 64K bearer (B) channels and one 16K delta (D) channel that acts as a controller. You can use one or both B channels for surfing, for speeds of 64K or 128K (in some areas, the speeds are 56 and 112). Because the lines are digital, there is very little noise, and you're assured of getting a connection at the full speed. Availability Widely available in metropolitan areas. ISDN works over the same two-wire copper lines as existing analog phone lines. ISDN has a line limit of 18000 cable feet from the nearest switching station, which limits its use to urban and suburban settings. A number of telephone companies have Web pages that allow you to enter your phone number and area code to determine if ISDN is available in your area. See the links section below. Discussion ISDN is the high-speed access technology of choice for home users and small to medium businesses. Nothing else is as widely available, economical, or mature. The hardware, lines, and Internet access are all available today, and millions of people are already taking advantage of it. ISDN is already an ITU standard, so there's no need to fret over looming standards wars or patent lawsuits. One huge advantage of ISDN is that one ISDN line has two phone lines with two phone numbers. You can surf and use the phone at the same time. Practically all consumer ISDN hardware has a port (called a POTS port) for plugging in analog phone equipment (telephones, fax machines, etc.) so you can use your analog equipment over the digital line. You can even plug your modem into the POTS port for calling services that don't support ISDN. Even with 56K coming around the bend, you should strongly consider ISDN today if it's within your budget. While 56K users are going through the inevitable teething pains of a new technology, ISDN users will be able to enjoy twice the speed with none of the compatibility hassles.
Links Bell Atlantic ISDN BellSouth ISDN Availability comp.dcom.isdn Frequently Asked Questions Dan Kegel's ISDN Page ISDN Tutorial Macintosh ISDN FAQ newsgroup: comp.dcom.isdn Pacific Bell ISDN Availability PC Magazine - Way-Fast Phone Lines: Easy ISDN? Surely,
you're joking. Southwestern Bell ISDN Overview |
