PCMCIA modem not found

Unforgiven79 · 08-28-2006, 02:09 PM

Hello,

I've just plugged a PCMCIA 56K serial modem (make CONCEPTRONIC) in its proper slot of my Asus laptop, but YAST (SuSE Linux 10.1) just doesn't find it with its "Network/Modem" function!

That's fairly strange, since:
- Windows finds it by Plug'n'Play (and I am sure this is NOT a WinModem) and claims it is connected to COM4
- It is labelled as suitable for any Windows or Linux OS.
- In the YAST hardware list it is found that the PCMCIA slot is present.

Have I forgotten anything?

ramram29 · 08-28-2006, 03:10 PM

Run:

dmesg | grep ttyS

and tell me when it says.

Unforgiven79 · 08-28-2006, 06:01 PM

It says:

serial 8250: ttyS1 at I/O 0x2f8 (irq=3) is a 16550A
0.0: ttyS0 at I/O 0x3f8 (irq=3) is a 16550A
0.0: ttyS0 at I/O 0x3f8 (irq=3) is a 16550A

Any idea?
Last time I have tried with the modem recognition, all of a sudden and I don't know why, the system has found an AT Modem.
However, I can only use it with KPPP as root (not as user), and anyway it denies to connect and return "Segmentation fault". Though, interrogation is positive...

ramram29 · 08-29-2006, 07:33 AM

It seems here like your modem is on /dev/ttyS1 which is the equivalent of COM2 in DOS. You may want to try using wvdial and see if you can dial a fax and hear it connect.

Unforgiven79 · 08-30-2006, 12:23 PM

Thank you for your explanation. Actually, after some tries, I have been able to have it recognized.

KPPP is even able to interrogate it. Though, when connecting it returns "Segmentation Fault". Do you think is it because I have a wrong driver for the chipset?

ramram29 · 08-30-2006, 03:28 PM

PPP uses IP packets segmented at 1492 bytes per packet. Some ISP's transmit from 1452 to 1492 to 1500 going up by ten. There is a way to find the exact match with your ISP but for PPP, 1492 is the standard packet size.

Cable modem uses 1500 bytes. It may be that you need to set your router to 1492 bytes per packet or you'll get transmit errors.