6.   The Internal Modem

This section lists the most commonly used AT commands for the APS-8M's internal Multi-Tech modem, and briefly describes the procedure for communicating with the internal modem. Please note that although APS-8M Port 8 is the internal modem port, any APS-8M port can also be configured for connection to an external modem.

6.1.   Communicating with the Internal Modem

To communicate with the APS-8M's internal modem, proceed as follows:

1. Access the APS command mode as described in Section 5.1.

Notes:

• If you log on to the APS-8M using a Port Password (rather than the Supervisor Password), you will only be able to connect to Port 8 if your password allows access to that port. The Supervisor Password always allows access to Port 8.
• To access the internal modem's command mode from a remote location, you must first dial into an external modem installed at one of the other RS232 ports, and then proceed as described below. The internal modem's command mode cannot be accessed via a remote connection to the internal modem.

2. When the APS> command prompt appears, type /C 8 and press [Enter] to connect to the internal modem port (Port 8).



3. When the connection is established, the APS-8M will respond with a message that reads "Connected: 08", and lists the Port Name and currently selected disconnect command.

6.2.   Common AT Commands

This section lists some of the most commonly used AT commands for the APS- 8M's internal Multi-Tech modem. For a complete listing of all available AT Commands and S-Registers, please refer to http://www.wti.com/guides/guidarch.htm, or access the modem command mode, and display the modem help screen using the $Hn command.

Notes:

• Type commands in either upper or lower case. Do not use a combination of upper and lower case characters.
• Use the Backspace key to delete errors.
• All commands begin with the AT prefix, and are invoked by pressing [Enter] (Carriage Return).The only exceptions are the A/ command (Repeat Previous Command) and +++ (Exit to on-line command mode).
• The maximum command length is 40 characters. This does not include the AT Prefix, Carriage Returns, or spaces.