Microsoft KB Archive/99254

= Problems with Compaq 486/C LTEs and Megahertz 14.4k Modems =

Article ID: 99254

Article Last Modified on 10/31/2006



This article was previously published under Q99254



SUMMARY
The Megahertz 14.4-kb modems in the new Compaq 486/C LTEs operate correctly only when in the docking station. When in the expansion base, they do not respond to any commands during battery or AC adapter operation, not to any commands from RAS, Windows Terminal or MS-DOS- based terminal packages, regardless of the power source. They work properly only when in the docking station.

Originally, this appeared to be related to power conservation, because CMOS setup showed the modem state as OFF. However, using Powercon from MS-DOS and setting the modem to ON did not fix the problem.

This is caused by BIOS v1.06--a bad BIOS revision on the modem itself. BIOS v1.09 CURES the problem.

You can determine the modem's BIOS revision by typing AT %V from a terminal program.

Additional query words: 2.20 megahertz modem compaq

Keywords: KB99254

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