[ale] Modem identification and connecting

[Alex Carver]

I'm tinkering with a cardbus modem I found in one of my hardware piles
(I'm still missing the actual cable but I know I have it here
somewhere).  Anyway, I'm trying to figure out the best way to see if
it's working (eg, responding to AT commands) but I can't quite seem to
get minicom to talk to it.  It's not a winmodem as far as I know.
According to dmesg, the pcmcia system sees the card, then serial_cs sees
the card and identifies it as a 16550A sittign on IRQ 3 0x3e8.  It
eventually gets assigned to /dev/ttyS2.

So far nothing seems out of the ordinary but I just can't seem to get it
to respond to any basic commands (not even plain AT for which I should
see OK).  I know the cardbus system is working because I also have a
wireless network card in there and that's working fine.

Ideas for probing and testing the modem?