US Robotics Courier V.Everything 3CP3453 Getting Started Manual page 38

These are the standard port names and settings:
Outgoing Calls
/dev/cua0
/dev/cua1
/dev/cua2
/dev/cua3
Use the setserial command to tell Linux about any nonstandard
COM/IRQ combinations that you may have set using the
Couriers jumpers. Setserial also selects serial port speed and
I/O port address.
Linux has a built-in communications software package called
minicom. By default, minicom is located in the usr/bin
directory.
For instructions about how to set up your Linux
communications software package, call our fax-on-demand
service (at 800-762-6163 or 847-676-1598) or our BBS (at 847-982-
5092). Request document 10000 for a list of our technical
support documents.
3-14 Courier V.Everything Internal Modems: Getting Started
Incoming Calls Port
/dev/ttyS0 COM1
/dev/ttyS1 COM2
/dev/ttyS2 COM3
/dev/ttyS3 COM4
IRQ I/O Address
4 03F8
3 02F8
4 03E8
3 02E8