Path: utzoo!attcan!uunet!cs.utexas.edu!sdd.hp.com!hplabs!hpcc01!hpcuhb!hpsqf!hpqtdla!eric
From: eric@hpqtdla.HP.COM (Eric Percival)
Newsgroups: comp.sys.hp
Subject: Re: Modems
Message-ID: <560012@hpqtdla.HP.COM>
Date: 14 Jun 90 07:25:13 GMT
References: <1990Jun13.153719.17110@groucho>
Organization: HP, Queensferry Telecomms, Scotland
Lines: 22


> I have an HP 350 with a Hayes compatible modem installed on my
> serial port.  I am able to accept incoming calls without difficulty.
> However, if I make an outgoing call, I am unable to receive incoming
> calls after I hang up.  I have to reboot in order to again receive
> incoming calls.  Is this normal or can it be fixed?  Keep answers
> simple since I'm not very smart.
> 

Do you have the modem set to ignore DTR ?  If so then this could be part
of your problem, although it shouldn't be necessary to reboot.  Cycling
the power on the modem should be enough.  When you logout on a properly
configured modem port, the DTR line is dropped.  This tells the modem that
the session is finished and it drops the phone connection.  If DTR is
forced on, if the Hayes modem is like an HP37212A/B, then even hanging
up the phone will not return the modem to its command state.  It stays in
transparent mode unti either the power is cycled, an attention sequence
is received or DTR is dropped.

Eric Percival   eric@hpsqf.sqf.hp.com

# All opinions are those of me, myself and I