[lug] ttySx - ppp woes with cdpd modem

[Ferdinand P. Schmid]

HI,
Now that I have my ssh problems all cleaned up I am banging my head
against another problem:

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
twist and turn it I can't get it to work in Linux.
If I manually connect the modem (using minicom) I can successfully log
on to my ISP.  Then when I try to bring up my ppp interface by issuing
the command:

/usr/sbin/pppd -d -detach /dev/ttyS1 19200 &

I get:
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
<accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
<accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
<accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
<accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
<accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
<accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
<accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
<accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
<accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
<accomp>]
LCP: timeout sending Config-Requests
Connection terminated.
Receive serial link is not 8-bit clean:
Problem: all had bit 7 set to 0

If I specity my options file for ppp parameters then I get Exit2 without
any further explanation.

The modem is fixed at 19200 baud serial communication speed and hardware
flow control.

Any ideas anybody - what am I doing wrong or what am I missing?

Thanks,
Ferdinand

--
Ferdinand Schmid
Architectural Energy Corporation
http://www.archenergy.com
(303) 444-4149