Dial Troubleshooting
Problem: The modem does not automatically dial a call when you send a Dial command.
Solution: Make sure the modem speaker is turned on in your software so that you can hear dialing sounds. Also make sure that the telephone line is plugged in.
Make sure that your are dialing a valid tele- phone number, including any required dial prefixes.
If you are using tone dialing on a line that re- quires pulse dialing, the line may not be able to accept
Make sure software dialing prefix is either ATDT (for tone dialing) or ATDP (for pulse di- aling).
Make sure your communications software and modem are configured for the same serial port.
Make sure your modem has hung up from the previous call. Select Hang Up in your software. Or you can change to terminal mode, wait one second, type ATH, and press Enter to hang up the modem.
Connection Troubleshooting
Problem: The modem can connect to some modems, but not to others.
Solution: If a remote modem does not respond because of the extended negotiation process, you may have to disable part or all of the negotiation process. In the following table, “protocol” means error correction and data compression.
Chapter 3 Solving Common Problems | 21 |
