This procedure is used to initialize a Cardinal 28.8 bpd V.34BIS Modem for either dial in or dial out.

Enabling a modem for dial-in under CCI Concurrent DOS:

The following commands (less their comments) need to be sent to the modem. The easiest way to do this would be to set the port as an AUX port and use ADUMB to initialize the modem. Set handshaking to NONE for this exercise. Don't forget to use the AUX command with the correct AUX port the modem is connected to. COM1 is AUX0, COM2 is AUX1, and the first Addon Port is AUX2. You should see an OK after hitting return for each command as an indicator that the modem understood the command. If COM1 or COM2 is being used as the port for the modem, FORCE may be used to send the initialization string. See the example below.

AT&F        Restore Factory Defaults

AT&C1     DCD follows carrier

AT&D3     Modem disconnects, then performs a soft reset when DTR drops, loading the active profile

AT&K3     Use RTS/CTS Flow control (default)

AT&S1      DSR Active after answer tone has been detected & active until the carrier has been lost

NOTE: The next three commands use the number 'zero', not the letter 'O'

ATQ0        Disables Result Codes

ATS0=1    Modem answers on first ring

AT&W0    Writes profile to NVRAM

For dial out, the application being used will likely program the modem itself, so we recommend that the the communication application run from a batch file. The following two lines should be put into the batch file after the program has run:

FORCE XCOMn AT&F&C1&D3&K3&S1Q0S0=1&W0

CCIMODE COMn [baud rate] RESET

Where 'n' is the number of the COM port, and [baud rate] refers to the speed of the serial port. These two commands reinitialize the port, allowing the next remote caller to access the modem.

Enabling a modem for dial-in  under Multiuser DOS 7 GOLD:

The following commands (less their comments) need to be sent to the modem. The easiest way to do this is to set the port as an MODEM port and use ADUMB to initialize the modem. Set handshaking to NONE for this exercise. Don't forget to use the AUX command with the correct AUX port the modem is connected to. COM1 is AUX0, COM2 is AUX1. Another method of sending the string is to use the FORCE command if the modem is on COM 1 or 2. You should see an OK after hitting return for each command as an indicator that the modem understood the command.

AT&F       Restore Factory Defaults

AT&C1    DCD follows carrier

AT&D3    Modem disconnects, then performs a soft reset when DTR drops, loading the active profile

AT&K3    Use RTS/CTS Flow control (default)

AT&S1    DSR Active after answer tone has been detected and active until the carrier has been lost

ATQ0       Disables Result Codes

ATS0=1   Modem answers on first ring

AT&W0   Writes profile to NVRAM

Continued...