Multitech Zpx Multimodem MT5634ZPX-PCI-V92 Guide de l'utilisateur télécharger pdf (Page 19)

4 Troubleshooting

MultiModemZPX User Guide

To change the dial prefix in Windows HyperTerminal, select Connect from the Call menu,

click Dialing Properties, and type 9 in the local and long distance boxes.

• 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.

• If the modem reports NO CARRIER, the phone was answered at the other end, but no

connection 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 there is a modem at the other end. In that case,

the modems might be having problems negotiating because of incompatibilities or line

noise. Try the call again, connecting at a lower speed by setting register S37 to a lower rate

(for example, by typing ATS37=11 in the terminal window and pressing ENTER).

• Poor line conditions can also affect the connection. When using V.34 or V.32 client-to-client

connections in poor conditions, setting S38=0 may result in better performance.

The Modem Disconnects While Online

• If you have Call Waiting on the same phone line as your modem, it can interrupt your

connection when someone tries to call you. If you have Call Waiting, 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). For example, in Windows select Start | Settings | Control Panel, and then

Modems. In the Modems Properties dialog box, select Multi-Tech MT5634ZPX-PCI, and

then click Dialing Properties. Check This location has call waiting, and then select the

correct code for your phone service.

• 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.

• Check that the phone cord between the modem’s LINE jack and the wall jack is undamaged

and firmly connected to both.

• 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.

• 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.

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Multitech Zpx Multimodem MT5634ZPX-PCI-V92 Guide de l'utilisateur Page 19