U.S.Robotics 5661A Mode D'emploi page 11

VOICE MAIL USERS:
Possible solution:
If you have voice mail provided by your local phone company, your dial tone may be altered when
messages are waiting. Retrieve your voice mail to restore your normal dial tone.
My modem sounds like it's trying to connect to another modem but fails.
Possible solution:
You may have a poor connection. All calls are routed differently, so try placing the call again.
My modem isn't achieving a 56K Internet connection.
The V.92 and V.90 protocols allow for download speeds of up to 56K and the V.92
protocol adds upload speeds of up to 48K, but line conditions may affect the actual
speeds during a given connection. Due to unusual telephone line configurations, some
users will not be able to take full advantage of V.92 or V.90 technology at this time. In order to
achieve a V.92 or V.90 connection:
• The server you're dialing into must support and provide a digital V.92 or V.90 signal. Your
ISP can provide you with a list of dial-up connections and information on what those
connections currently support.
• The telephone line between your ISP and your modem must be capable of supporting a 56K
connection and contain only one digital-to-analogue conversion. The 56K signal from your
ISP begins as a digital signal. Somewhere between the ISP and your modem, there will be a
digital-to-analogue signal conversion so that your modem can receive the data. There must
be no more than one digital-to-analogue signal conversion in the path from your ISP to your
modem. If more than one analogue-to-digital conversion occurs, your connect speeds will
default to V.34 (33.6 Kbps). There may also be impairments on the local lines between your
ISP and your modem. These impairments can prevent or limit V.92 or V.90 connection
speeds. All telephone calls are routed differently, so you should try making your 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.
• Your modem must be connecting to a V.92 or V.90 server. A pair of 56K modems will not
connect to each other at 56K speeds.
Support Resources
If you have not fixed your problem after trying the suggestions in the "Troubleshooting" section,
you can receive additional help via one of these convenient resources:
World Wide Web
The U.S. Robotics Web site contains useful product information, documents, downloads, and
updated FAQs.
http://www.usr.com/support
Are You Still Having Problems?
1. Contact the dealer who sold you the modem.
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