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Navas 28800-56K Modem FAQTM 

(Answers to Frequently Asked Questions)

[Modem Picture]

Cable modem/DSL users: see Navas Cable Modem/DSL Tuning GuideTM

D. ADVANCED TECHNOLOGIES

Copyright 1999-2008 The Navas GroupSM, All Rights Reserved.
Permission is granted to copy for private non-commercial use only.
Send mirror and commercial license inquiries to John Navas.

Posted as <http://modemfaq.navasgroup.com/faq_d.htm>.

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What is ISDN?

Probably the most likely successor to V.34, ISDN (Integrated Services Digital Network) provides up to 2-4 times the speed of V.34 over a standard local telephone line by using digital, rather than analog, signals. Years in the making, ISDN is finally being widely deployed in the U.S. at the time of this writing. To use ISDN you will need special, expensive equipment. A problem is that ISDN transmissions are typically not compressed; as a result, with compressible data the speed of a V.34 modem is often comparable to a single ISDN channel. In the opinion of the author, V.34 will probably be a cost-effective alternative to ISDN for years to come.

Although ISDN is a digital transmission medium, there are some ISDN products that will also allow you to connect to conventional analog modems (e.g., USR Courier I-modem with ISDN/V.34, ZyXEL Elite 2864I, and ZyXEL Prestige 2864I).

Microsoft has released the Dial-Up Networking 1.4 Upgrade for Windows 95, which enables Windows 95 to make Dial-up Network connections over ISDN lines, as well as other improvements and bug fixes. It includes (and replaces) all of the improvements previously released in previous versions.

ISDN information is available at:

Magazine Reviews

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What are "cable modems?"

A "cable modem" is a device that provides high-speed access to the Internet through a cable TV system. For more information, see

Navas Cable Modem/DSL Tuning GuideTM

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What are ADSL, SDSL, IDSL, HDSL, and VDSL?

Digital Subscriber Line (DSL) technologies that provide high-speed data transmission over conventional telephone lines include:

For more information, see

Navas Cable Modem/DSL Tuning GuideTM

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What are "wireless" modems?

In the opinion of this author, wireless (particularly spread spectrum) technology may represent the real future of modem communications.

General Information:

Technical Information:

Other Resources:

(Note: This author cannot vouch for the accuracy of these resources.)

Products:

Services:

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What are "satellite" modems?

An expensive modem allows you to receive (but not send) data at high speed by satellite.
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