Date: Sun, 12 Jan 1997 21:42:47 -0500 (EST) From: Chuck Robey <chuckr@glue.umd.edu> To: Frank Durda IV <uhclem@nemesis.lonestar.org> Cc: nate@mt.sri.com, freebsd-questions@FreeBSD.org, freebsd-current@FreeBSD.org, freebsd-stable@FreeBSD.org Subject: Re: User ppp not hanging up modem. Message-ID: <Pine.OSF.3.95.970112214011.13275E-100000@uplink.eng.umd.edu> In-Reply-To: <m0vjcEb-000u3fC@nemesis.lonestar.org>
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On Sun, 12 Jan 1997, Frank Durda IV wrote: > > [14]On Sat, 21 Dec 1996 dicen@hooked.net wrote: > [14]Note that the standard command "&D3" tells the modem to reset itself when > [14]DTR drops. Nate's right, this _is_ standard. > > I have been modem designs for three years, so you have stepped into > an area where I have some expertise. > > Unfortunately, &D3 is not a standard. EIA 602, the AT command set > standard (as opposed to a vendors reference modem standard) includes only > &D0, &D1, and &D2. Many major brands including Sportsters, either do > not support &D3 or don't store it in EEPROM, making it useless. I have a Sportster, the manual is open in front of me, and that's NOT true, it DOES have &D3. If its specified on dialup, then it will work on disconnect (with or without eeprom storage). > > If available, &D3 or a given modem makers functional equivalent command > is the best way to go for all serial modem sessions, since it guarantees > that no settings from one call persist to the next. Everybody gets a > clean slate. > > &D2 is the next best available choice. If all you have is &D2, add a > ATZ to the hang-up or dial-out script to obtain functionality close to > what &D3 would have provided. > > Frank Durda IV <uhclem@nemesis.lonestar.org>|"The Knights who say "LETNi" > or uhclem%nemesis@rwsystr.nkn.net | demand... A SEGMENT REGISTER!!!" > |"A what?" > or ...letni!rwsys!nemesis!uhclem |"LETNi! LETNi! LETNi!" - 1983 > > ----------------------------+----------------------------------------------- Chuck Robey | Interests include any kind of voice or data chuckr@eng.umd.edu | communications topic, C programming, and Unix. 9120 Edmonston Ct #302 | Greenbelt, MD 20770 | I run Journey2 and picnic, both FreeBSD (301) 220-2114 | version 3.0 current -- and great FUN! ----------------------------+-----------------------------------------------
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