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5 -
THROUBLESHOOTING GUIDE
This chapter describes common problems in the installation, configuration and regular usage of your
Modem. To test the Fax/Data Modem, a communication software package is needed and the package must
include a mode that allows you to operate your Modem by directly issuing internal commands to the
modem.
Follow the procedures in the following sections to resolve these common problems:
¡ » N o Response From Your Modem
1. To make sure that the modem's power was already up.
2. There are such kind of situation would appears the message like " Could not communicate with
modem!" or " The modem do not respond !". We recommend you to double check the setting
or installation of the modem on the control panel.
3. Issue the ATZ command to reset your modem. The returned result code should be "0" or "OK"
depending on what communications program you are using. Your modem is OK if you get one of
these responses. If there is no response after issuing the ATZ<CR>, continue to the next step.
4. Issue the command: AT&F&W <CR>, if a "0" or "OK" result code is displayed on the screen,
your modem is OK. Otherwise, contact your dealer for assistance.
¡ » Your Modem Does Not Dial Out
To make sure that your modem responds normally as described in section 4.1. If you can communicate
through the keyboard, check whether the modem is properly connected to the phone line. Or a situation
be similar to the following case,
Software respond "No Dialtone !!" mean that the modem do not detect line dial tone.
Sol : So first of all, to make sure the LINE has been plug into the LINE JACK of the right
position on modem. If yes, then use a telephone set and plug the line into the telephone set.
To hear the tone in handset. If you can hear the right dial tone as usual. Probably you
modem has some damage in DAA circuit.
¡ » Your Modem Does Not Connect After It Has Dialed a Phone Number
The problem may have several causes.
1. The phone line may be too noisy or the telephone cord may be poor.
2. Try the line with a regular phone.
3. Also the remote modem may not recognize your modem's baud rate.
4. The Modem could dial out but can not hear the negotiation and respond "No CARRIER" or
respond "BUSY".
Sol : Could be possible with incorrect setting in modem's configuration, such like country code or
DTMF tone duration.
¡ » Your Can't Transmit After You Have Connected to the Remote Modem
In this case, check the communication parameters of the remote modem, then configure your software to
the same number of data bits, stop bit, and parity.
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