Adding modems

Configuring modems with the Modem Manager

The Modem Manager allows you to configure modems for your system. You can choose to:

let the Modem Manager autodetect your modem and configure it automatically.
manually enter the configuration information for the modem in the Modem Manager.

The Modem Manager automatically links the atdialer program with the configuration file in /usr/lib/uccp/default that corresponds to your modem. The correct entry for your modem is also added to the /usr/lib/uucp/Devices file.

Start the Modem Manager in any of these ways:

Double-click on the System Administration icon on the Desktop, then on Networks, and finally on Modem Manager.
Start the SCOadmin launcher by entering scoadmin on the command line, then select Networks, and finally Modem Manager.
Enter scoadmin modem manager on the command line.

For more information on using SCOadmin managers, see ``Administering your system with SCOadmin''.

By default, you configure the local host. To configure a different host, select Open Host from the Host menu, and choose another host.

Detecting a modem automatically

To detect a modem automatically with the Modem Manager:

Verify that the modem is connected and switched on.
Start the Modem Manager.
Select Add from the Modem menu, and then select Automatic detection.
Select the serial port to which the modem is attached, or select Any to have the system examine all serial ports.
You can enter a third-party serial device name for your serial port once that device has been configured into your system; see your serial device documentation for installation and configuration information.
NOTE: A driver for the serial port must have been configured into the kernel. If a suitable driver is not available, and the serial port is on an SCO OpenServer-supported serial card, click on Add port to define the serial card and its ports. Follow the instructions in ``Configuring a serial card''. If the serial port is on a non-SCO OpenServer supported or an intelligent serial card, it must be configured to use a third-party driver. Refer to the instructions for installing the driver provided with the serial card.
You must disable the corresponding internal COM port in your laptop's BIOS before configuring a PC Card serial modem, otherwise your system may hang when it is rebooted.
After you relink the kernel with the correct serial driver, exit the Modem Manager, and then shut down and reboot your system.
You must re-invoke the Modem Manager after your system has rebooted to be able to detect a modem automatically.
You do not need to reboot the system to add a modem manually to a newly defined port, but you will not be able to use the modem or the port until you reboot the system.
Click on OK to start the system searching for the modem. As the serial port is probed, the indicator lights on the modem should flicker on and off for several seconds. While the Modem Manager probes the serial port(s), it updates the list of the modems that it has detected.
When it finishes probing the ports, select the modems to add, and click on Add.

If the system does not detect a modem, check that the modem is connected correctly and is switched on. Some older models of modem are not capable of being detected. If automatic detection still fails, enter the configuration manually as described in ``Adding a modem manually''.

Adding a modem manually

To manually add the configuration information for a modem using the Modem Manager:

Start the Modem Manager.
Select Add from the Modem menu, and then select Manual configuration to bring up the Modem Configuration window.
Enter the following information:

Modem vendor
Select the manufacturer of your modem. If this is not listed, select Standard Modem Types.

Modem model
Enter the modem model. If you selected Standard Modem Types for the Modem vendor, select Standard Modem.

Line speed (bps)
Enter the serial line speed at which you want to the computer and modem to communicate. The default speed is 38,400bps. You can set the speed as high as 230,400bps if the serial port uses a 16550 UART or higher specification UART. Do not set the speed higher than 9600bps if the serial port uses a 8250 UART. Select Any to use the default speed for the serial line (this is usually 9600bps). See ``Serial port speeds, line-mode labels, and UART limitations'' in ``Configuring a serial port'' for more information.

Modem port
Select the modem control serial device (such as tty2A) corresponding to the port to which the modem is connected. If the port is not listed, click on Add port to configure the serial port for your system, and follow the instructions in ``Configuring a serial card''.
You can enter a third-party serial device name for your serial port once that device has been configured into your system; see your serial device documentation for installation and configuration information.
To change the speed or interrupt trigger level, or to enable or disable a login on a port, follow the instructions in ``Configuring a serial port''.

Answer mode
Select On to have the modem answer incoming calls. This allows your system to provide remote access PPP or incoming SLIP connections. It enables a getty process on the serial line attached to the modem to allow incoming connections to log into your system.
Select Off if you want to prevent your system accepting incoming calls.
Click on OK to accept the configuration.

Modifying the configuration of a modem

To modify the configuration information for a modem using the Modem Manager:

Start the Modem Manager.
Select the modem to modify.
Select Modify from the Modem menu to bring up the Modem Configuration window.
Click on OK to confirm.

Removing a modem

To remove the configuration information for a modem using the Modem Manager:

Start the Modem Manager.
Select the modem to remove.
Select Delete from the Modem menu.
Click on OK to confirm.