Modes of Operation
Courier 56K Business Modem Command Reference
Modes of Operation
This chapter contains information about:
Entering Online Command Mode
When the modem is in Online Mode, the only command it recognises is an escape code, or +++.
Revert to Command Mode without losing connections by using setting DIP switch 9 down or sending ATS14.0=0 to the modem before establishing your connection.
You can change the characters used to revert to Command Mode or the wait time by resetting Register S2 or S12. For more information about resetting these S-Registers, refer to the S-Registers chapter in the Appendixes section.
Returning to Online Mode
There are two ways to return online using the ATOn command.
Example: Sending ATO1, will allow you to resynchronise if you experienced errors during a non-ARQ data transfer.
There are two local echo settings, one for Command Mode and one for Online Mode.
Command-Mode Local Echo
You can configure your modem to display the commands you type onscreen by using the ATEn command.
Note: Although you cannot see the command when you set ATE0, the modem is receiving them. The E command is set according to DIP switch 4.
Online-Mode Local Echo
To configure your modem to display a copy of data that is being transmitted on your screen you can use the ATFn command.
Note: You may see the term "duplex" used in place of online local echoing, although the term is not technically accurate.
Fax operations require facsimile-compatible communications software that can send or receive Group III faxes. Follow the instructions in your fax software manual.
Note: The modem's default operating mode is Data Mode. Most fax software automatically switches the device to Fax mode when you run the program and resets the device to Data mode when you exit the program.
Example: Sending AT+FCLASS=1, allows you to receive faxes from fax machines.
Note: Class 1 and Class 2.0 Fax Modes refer to standards set by the Electronic Industries Association/Telecommunications Industry Association. Class 1 Fax Mode is the minimal standard for computer-faxmodem interface. Class 2.0 Fax Mode refers to the extended computer-faxmodem interface.
If you are not sure whether your modem is in Data or Fax mode, use the AT+FCLASS? command.
Note: Whenever the modem is reset
using the ATZ command or by turning the power off and then on, it will
reset to Data Mode.