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Article: Modem-access adapter reduces interference.
- Article from:
- EDN
- Article date:
- July 22, 1999
- Author:
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Copyright informationCOPYRIGHT 1999 Reed Business Information. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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THE MODEM-ACCESS ADAPTER (MAA) in Figure 1 has features that reduce problems when modems and phones share the same line. The design also overcomes the shortcomings of modem interference protectors. The design eliminates mutual interference between phones and modems, is compatible with the line-usage indicators on multiline phones, can search for an idle phone line in multiline installations, draws minimum power, and requires no changes to a PC modem's hardware or software.
[Figure 1 ILLUSTRATION OMITTED]
Most residential PC users connect to the Internet using a dial-up modem. In most cases, the modem and voice calls must share one phone line. This ...
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