US Robotics 56K MESSAGE MODEM - QUICK INSTALLATION GUIDE FOR WINDOWS Quick Installation Manual page 22

PROBLEM: 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.
PROBLEM: My modem isn't achieving a 56K Internet connection.
Possible solution:
Our research has shown that the vast majority of telephone lines can and do
support V.90/V.92 connections. The V.90/V.92 protocol allows for connection
speeds of up to 56K, 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.90/V.92 technology at this time. In order
to achieve a V.90/V.92 connection:
1. The server you are dialing into must support and provide a digital V.90/
V.92 signal. Your ISP (Internet Service Provider) can provide you with a list
of dial-up connections and information on what those connections cur-
rently support.
2. The telephone line between your ISP and your modem must be capable of
supporting a 56K connection and contain only one analogue-to-digital con-
version. The 56K signal from your ISP begins as a digital signal. Some-
where 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 analogue-to-digital signal conversion in
the path from your ISP to your modem. If more than one analogue-to-dig-
ital conversion occurs, your connection 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 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. For a V.90 connection, 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.
4. For a V.92 connection, your modem must be connecting to a V.92 server. A
pair of 56K modems will not connect to each other at V.92/56K speeds.
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