UPGRADING REPAIRING PCs

Table 6.11 Troubleshooting the V.90 (ex-K56flex) Modems
Continued
Problem Solution Method
Your ISP If your modem is a The modem needs to have a 2MB
supports both so-called “Dualmode” ROM chip to have sufficient room for
V.90 and K56flex, modem, install both firmware types.
and you’d like both K56flex and
a choice. V.90 firmware.
If your modem won’t
permit both firmware
types, download both
V.90 and K56flex firmware,
try both, and see
which one works
better.
You’re not sure If your vendor has
the latest several versions of
firmware upgrade firmware available for
was really an download, try some of
improvement. the earlier versions, as
well as the latest version.
An earlier version might
actually work better
for you.
Your modem is a Download the country- Check the Web site for your country;
non-U.S./Canada specific upgrade for contact tech support if your country
model. your modem. isn’t listed.
The firmware Make sure you are
upgrade was using a V.90 dial-up
installed, and
the modem only
number.
works at 33.6Kbps Make sure you downor
less. loaded updated INF files
or other drivers for your
operating system.
Note
Modems 179
The problems with moving from K56flex to V.90 do not apply to
users who have updated their V.34/V.34bis modems directly to
the V.90 standard, whether by a downloadable firmware update
or physical modem or chip swap. Even if your V.34/V.34bis
modem was made by a company that later made K56flex
modems, you don’t need to worry about this unless you updated
to K56flex before going to V.90. Then, the troubleshooting advice
given earlier applies to you as well.