Linux: Verifying The Ports; Linux: Tty Devices Created By The Drivers - Multitech ISIHI-2S User Manual

3.15.7 LINUX: Verifying the ports

Terminal utilities like 'minicom' can be used to verify the ports, 'talk' to the modem, and dial out.
To configure 'minicom' for a particular port, run it with the '-s' option. In the 'serial port setup' menu option, set
the serial device to the required ISI port device (for example, '/dev/ttyM1a' for the first port on the first card).
Save the configuration for a particular port using the 'save setup as' menu option as, for example, '1a' for the
port /dev/ttyM1a. To connect the next time to the port /dev/ttyM1a using minicom, 'minicom 1a' needs to be
executed.

3.15.8 LINUX: TTY Devices Created by the Drivers:

Device files corresponding to ports on the ISI card are created in the /dev folder. Use ttyMxy for normal ports
and cumxy for corresponding callout ports. Normal ports (ttyM) are configured for dial-in connections. Callout
ports (cum) are used for dial-out connections.
In these expressions (ttyMxy and cumxy), the letter x is the card number (1-4), and y is the port designator (a,
b, c, ...).
The ISI Linux driver creates the following TTY devices in /dev directory:
- /dev/ttyM1a TO /dev/ttyM1p for the first ISI card
- /dev/ttyM2a TO /dev/ttyM2p for the second ISI card
- /dev/ttyM3a TO /dev/ttyM3p for the third ISI card
- /dev/ttyM4a TO /dev/ttyM4p for the fourth ISI card
For 4-port cards, it uses the following:
- /dev/ttyM1a TO /dev/ttyM1d for the first ISI card
- /dev/ttyM2a TO /dev/ttyM2d for the second ISI card
- /dev/ttyM3a TO /dev/ttyM3d for the third ISI card
- /dev/ttyM4a TO /dev/ttyM4d for the fourth ISI card
For 8-port cards, it uses the following:
- /dev/ttyM1a TO /dev/ttyM1h for the first ISI card
- /dev/ttyM2a TO /dev/ttyM2h for the second ISI card
- /dev/ttyM3a TO /dev/ttyM3h for the third ISI card
- /dev/ttyM4a TO /dev/ttyM4h for the fourth ISI card
For 16-port cards, it uses the following:
- /dev/ttyM1a TO /dev/ttyM1p for the first ISI card
- /dev/ttyM2a TO /dev/ttyM2p for the second ISI card
- /dev/ttyM3a TO /dev/ttyM3p for the third ISI card
- /dev/ttyM4a TO /dev/ttyM4p for the fourth ISI card
The ISIHP-1S is a special case. It is treated as an 8-port card with only four ports in use. As an example,
consider an ISIHP-1S that is the first expansion serial card in the computer. Ports ttyM1a and ttyM1b are
terminal adapter ports; ports ttyM1e and ttyM1f are modem ports. Ports ttyM1c, ttyM1d, ttyM1g, and ttyM1h
are unused and can be allocated to a different purpose after the ISIHP-1S installation is complete.
Chapter 3 - Software Installation
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