Re: tlug: Modem question

[Karl-Max Wagner <karlmax@example.com>]

> 
> Hi!
> 
> This question is not really Linux specific, but I stumbled
> over it when configuring my PPP scripts.  If I am in a hotel
> with my NotePC (running Linux of course ;-) and I want to
> dial out, then usually I have to prepend a 0 to get out of
> the hotel's local telephone system and get the usual dial
> tone. 
> 
> Now my problem is, without the standard dial tone my modem
> even doesn't want to dial this first 0.  I know there is a
> way to tell the modem to forget about the dial tone for a
> moment (in Windoze you can do that by selecting some check
> box or so, I think).  I consulted the docu of my modem and
> it seemed that I have to put a @ or W into the ATDP command, 
> but that doesn't work.  Any ideas? 
That old problem :-))) The atx command is responsible for that.
If you say atx1 or atx3 your modem will ignore the diatone. atx0
and atx2 tell it to watch out for a dialtone. Ypu just put such
a command into your init string and you're set. However, you
should have that either in the manual that came with the modem.
If you didn't find anything in the manual, look onto the
diskettes that came with the modem. Usually there is a technical
text on one of them detailing the command set and other things
about your modem. It's a normal text file you can read with just
anything ( e.g. less ).
> (I guess, this is independet of the modem, but I use a 3Com
> Etherlink III -- combined Ethernet/modem PCMCIA card.)
Hmmm.....smells like former US Robotics.....in this case consult
the tech doc AT ANY RATE. They have a tendency to modify the
original Hayes command set in ways that cause you no end of
trouble if you mistakenly think that they are fully Hayes
compatible. Example normally at&f rests your modem and loads it
with factory defaults. If you use it that way with US Robotics
it defaults to at&f0 which are factory defaults WITHOUT FLOW
CONTROL that cause mysterious line drops, buffer overruns etc.
With them you have to select at&f1, then it works correctly.

Hope that helps.

                            Karl-Max Wagner
                            karlmax@example.com
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