Error Diagnostics
Is the computer talking with the modem?
When you type AT<CR>, "OK" should be displayed. If the modem does not respond:
1. Make sure the modem is firmly connected to the computer.
2. Verify the communication program is configured to the correct com port (COM L, COM2:,
COM3:, or COM4:).
3. Verify the baud rate (2400, 1200, or 300) and check parity (even, odd, none).
4. If the modem still does not respond, type AT&F<CR>. This will reset the modem to the
original factory settings.
5. Try unplugging the modem and plugging it back in to ensure clean contact connections.
If the modem responds, but...
---characters are not displayed, type ATEI <CR>. This tells the modem to echo commands to
the screen.
...characters are displayed double, type ATE<CR>. This turns the echo feature off.
Modem does not answer.
If the modem does not answer an incoming call, type
ATSO = I < CR>.
* Check to make sure your terminal device has DTR high
Modem will not dial a telephone number.
If the computer displays
NO DIALTONE,
the modem is not receiving a dial tone. Connect a
standard telephone to the telephone line to verify a dial tone. If you do not hear dial tone,
something is wrong with either your telephone cable or telephone line. Try another cable or line.
