Voice Mail Users; My Modem Sounds Like It's Trying To Connect To Another Modem But Fails; My Modem Isn't Achieving A 56K Internet Connection - US Robotics USR5610B User Manual

46 C 4: T
HAPTER ROUB LESHOOTING A ND

Voice Mail Users

My modem sounds
like it's trying to
connect to another
modem but fails.
My modem isn't
achieving a 56K
Internet connection.
H R
ELP ESOU RCES
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.
Possible solution:
You may have a poor connection. All calls are routed differently, so try
placing the call again.
Possible solution:
Note: U.S. Robotics 56K modems are capable of receiving downloads at
up to 56 Kbps and sending at 31.2 Kbps. Actual download speeds you
experience may be lower due to varying line conditions. Maximum
download speeds in U.S. and Canada are limited to 53K, due to
regulatory limits on power output.
Our research has shown that the vast majority of telephone lines in North
America can and do support 56K Installation. The V.90 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
technology at this time. In order to achieve a V.90 connection, the
following must occur:
1. The server you're dialing into must support and provide a digital V.90
signal. Your ISP can provide you with a list of dial-up connections and
information on what those connections currently support.
2. The telephone line between your ISP and your modem must be
capable of supporting a 56K connection and contain only one
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 a 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