Re: [NTLK] [MP2100] MODEMtoMODEM communication problem

From: Russell,Allen (
Date: Wed Dec 01 2004 - 09:11:21 PST

The terminal program doesn't determine if the modem hangs up, the modem
does. Try adding &D to the modem setup string. This forces "DTR high",
which means that the modem won't hang up when DTR drops, when you exit the
terminal program (ie Kermit). If &D doesn't do it, try &D2 in the modem
setup string.

>Subject: Re: [NTLK] [MP2100] MODEMtoMODEM communication problem
>On Tue, Nov 30, 2004 at 01:26:25AM +0100, arfalas wrote:
>> The day 29/nov/04, on 22:34, Peter H. Coffin wrote:
>> > You'll need a terminal program on the computer side that A) is willing
>> > to leave the modem connected and B) properly releases control of the
>> > serial port, and C) have NCU then grab the serial port and use the
>> > previously-established hardware session.
>> Can you tell me the name?
>> > What exactly *are* the strange characters, and what is the XXXXX? That
>> > almost sounds like a possible speed-mismatch depending on the=20
>> > characters
>> > coming back. xxxxx`xxxx`xxxxxxxx`xxx I think was fairly symptomatic
>> > mismatch between 1200 and 2400 bps.
>> It changes every time i try.It is between 9600 and 33600 (the=20
>> connection speed
>> is configured to 9600). The strange characters are something like
>Try adding F8 to your setup string. That *should* lock the modem into
>V.32bis 9600 mode.
>Probably won't solve all the problems, but it may help some. I can't
>remember which modem you're using on the Newton side, but I'm presuming
>it's an internal one. and not terribly new. (Some newer ones don't do
>the ATFn command anymore, if that spits back an error, try AT+MS=9,0)


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