3Com 3CP5610A - U.S. Robotics 56K V90 PCI Performance Pro Faxmodem..., User Manual

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Help Resources 47
analog-to-digital conversion. The 56K signal from your ISP begins as a
digital signal. Somewhere between the ISP and your modem, there will
be an analog-to-digital signal conversion so that your modem can receive
the data. There must be no more than one analog-to-digital signal
conversion in the path from your ISP to your modem. If more than one
analog-to-digital conversion occurs, your connect speeds will default to
V.34 (33.6). There may also be impairments on the local lines between
your ISP and your modem. These impairments can prevent or limit V.90
connection speeds. All telephone calls are routed differently, so you
should try making your 56K connection several times. One way to test
this is to dial into a long distance location. Long distance lines are often
much clearer than local lines. It is important to note that telephone
companies are constantly upgrading their systems. Lines that do not
support 56K today may support 56K in the near future.
3 . Your modem must be connecting to a V.90/56K server. A pair of 56K
modems will not connect to each other at V.90/56K speeds.
Help Resources
World Wide Web
Contains useful product information, documents, and manuals. Log on
to:
http://www.usr.com/support
U.S. Robotics Knowledgebase
A Web-based troubleshooting tool that will help you solve problems you
may be having with your modem. Go to:
http://www.usr.com/kb
When the page loads, click the Modems graphic. Then follow the
onscreen directions.
Internet FTP
ftp://ftp.usr.com