[lug] ttySx - ppp woes with cdpd modem

Sean Reifschneider jafo at tummy.com
Wed Nov 8 22:06:09 MST 2000

On Wed, Nov 08, 2000 at 02:59:14PM -0700, Ferdinand P. Schmid wrote:
>I would like to set up a wireless modem (DART 300 from Sierra wireless)
>with a linux PC via a serial port /dev/ttyS1.  The modem automatically
>signs on to the ISP and works fine in Windows.  Yet no matter how I

The way I understand CDPD, the "sign on to the ISP" is actually talking
to the modem.  CDPD actually provides IP over the air, not like you are
connecting to a modem on a terminal server somwhere.  Though my CDPD
apparently has the ability to act like a phone as well, you probably
don't want to do that because you have to pay per-minute charges then.

I don't know anything about that modem, the ones we're using actually
do SLIP in the modem.  In fact, all the CDPD modems I've used did that.
I do an "ATD" and pop into SLIP right away.  The modem then receives the
SLIP packets and sends the IP over the cellular network.

Note that I've found Boulder to have particularly poor coverage...

Sean Reifschneider, Inimitably Superfluous <jafo at tummy.com>
tummy.com - Linux Consulting since 1995. Qmail, KRUD, Firewalls, Python

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