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8 Solving Problems
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MultiModemZBA-V-V92 User Guide
Ö If the modem reports
NO ANSWER
, the other system has failed to go off-hook, or you might
have dialed a wrong number. Check the number.
Ö If the modem reports
NO CARRIER
, the phone was answered at the other end, but no connec-
tion was made. You might have dialed a wrong number, and a person answered instead of a
computer, or you might have dialed the correct number but the other computer or software was
turned off or faulty. Check the number and try again, or try calling another system to make sure
your modem is working. Also, try calling the number on your telephone. If you hear harsh
sounds, then another modem is answering the call, and the modems might be having problems
negotiating because of modem incompatibilities or line noise. Try connecting at a lower speed.
Ö Poor line conditions can affect the connection. When using V.34 or V.32 client-to-client connec-
tions in poor conditions, setting S38=0 may result in better performance.
The Modem Disconnects While Online
Ö If you are not using Modem on Hold, Call Waiting can interrupt your connection when someone
tries to call you. If you have Call Waiting service, disable it before each call. In most telephone
areas in North America, you can disable Call Waiting by preceding the telephone number with
*70 (but first check with your local telephone company).
You can automatically disable Call Waiting by including the disabling code in the modem’s dial
prefix (e.g., ATDT*70,—note the comma, which inserts a pause before the number is dialed). To
change the dial prefix in Windows HyperTerminal, select Connect from the Call menu, click
Dialing Properties, check This location has Call Waiting, and select the correct code for your
phone service.
To learn more about Modem on Hold, see Chapter 7.
Ö If you have extension phones on the same line as your modem, you or someone else can
interrupt the connection by picking up another phone. If this is a frequent problem, disconnect
the extension phones before using the modem, or install another phone line especially for the
modem.
Ö Check for loose connections between the modem and the computer, the telephone jack, and AC
power.
Ö You might have had a poor connection because of line conditions or the problem might have
originated on the other end of the line. Try again.
Ö Your ISP might have hung up on you because of lack of activity on your part or because you
exceeded your time limit for the day. Try again.