Help: cannot access the modem from chat

Help: cannot access the modem from chat

Post by Michae » Wed, 26 Jul 2000 04:00:00

Hi all,

I am trying to setup the connection to my ISP but cannot access my modem
from the chat to dial out, something simple :

/usr/sbin/chat -v "" +++ATZ OK AT

which should reset the modem and request its status, doesnt effect
anything. The modem works just fine with the minicom. As I am using the
/dev/modem as link to /dev/ttyS0 I linked the /dev/modem to a file to
see what each application sends out. What I see then is that the "chat"
doesnt send anything to the device !!!!

Any ideas what could be wrong? Does the "chat" have a possibility to
switch on a debugging level, e.g. to trace the packets it sends and
receives? Or is it just a configuration issue?

Any help would be greatly appreciated.

I am using Suse destribution 6.0



1. PPP/CHAT: chat won't chat with modem, why?

I've been trying to get a dynamic IP connection to work via ppp, and I
think I've narrowed the problem down to the chat program.  chat
doesn't seem to be getting any responses from the modem.  I've been
trying to figure out what's going on by running chat from the command
line (can this work?), but no luck.  For example,

gives the following error messages:

Mar  9 11:43:49 rezkbox chat[1285]: timeout set to 3 seconds
Mar  9 11:43:49 rezkbox chat[1285]: send (^MAT^M^M)
Mar  9 11:43:49 rezkbox chat[1285]: expect (OK)
Mar  9 11:43:52 rezkbox chat[1285]: alarm
Mar  9 11:43:52 rezkbox chat[1285]: send (+++)
Mar  9 11:43:52 rezkbox chat[1285]: expect (OK)
Mar  9 11:43:55 rezkbox chat[1285]: alarm
Mar  9 11:43:55 rezkbox chat[1285]: Failed

I really don't know what's going on.  I'm also a bit confused about
the chat program; it's supposed to communicate with the modem, but how
does it even know which serial port the modem is on?

Any ideas?

-- Charles Rezk

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