Hi,

this is my scenario:

I have a Server Red Hat Enterprise Linux 5.4 with a default serial port; in addition I have installed a PCI card with other 2 serial ports.

I need to connect 3 external modems, one for each port.

Following some tutorial, in the terminal window I have entered the commands dmseg and setserial -g

The results are:

Code:
dmesg | grep tty
Xen virtual consol successfully installed as ttyS0
 
setserial -g /dev/ttyS*
Cannot get serial info: Invalid argument
/dev/ttyS1: No such device or address
/dev/ttyS2: No such device or address
/dev/ttyS3: No such device or address
In the tutorial, instead, the output is this
Code:
dmesg | grep tty
[   37.531286] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[   37.531841] 00:0b: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[   37.532138] 0000:04:00.3: ttyS1 at I/O 0x1020 (irq = 18) is a 16550A
 
setserial -g /dev/ttyS[0123]
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
/dev/ttyS1, UART: 16550A, Port: 0x1020, IRQ: 18
/dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4
/dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3
Please, can someone help me to configure correctly the serial ports in order to use with modems ?

Thank You and Best regards
Gaetano