Date: Fri, 12 Jul 1996 03:35:42 -0400 From: Gary Chrysler <tcg@ime.net> To: Terry Lambert <terry@lambert.org> Cc: martin.loeffler@utoronto.ca, questions@freebsd.org Subject: Re: forcing a modem to hangup Message-ID: <31E6004E.5873@ime.net> References: <199607120612.XAA00740@phaeton.artisoft.com>
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Terry Lambert wrote: > > > > Well, don't buy bad internal modems. 8-|. > > > > > > The problem is that you can't issue a blanket rule that way when > > > manufacturers don't put "bad modem" on the outside of the box, > > > since "the dealer told me it was a good modem, and you didn't > > > give me a list of good modems, so I bought it". > > > > > > > Huh, What? > > > > You get what you buy, Internal or External! > > Buy from K-Mart you deserve what you get. > > Gary: > > Can you name an internal modem which does not float open collector the > RTS between the modem UART and the modem chip? > Not off the top of my head, Don't care either. > That can be powercycled without power-cycling the machine? Nope. Not something I'm concerned about. Unless in a multi-modem enviorment, Then I would be using externals! I still prefer internal! > That doesn't use a Rockewll chipset, since some of the people I > talk to has US Robotics 14.4 Courier/Faxmodems with the firmware > bug? I use only Rockwell chipsets. > That itself is not a US Robotics Courier because some of the > people I talk to have Rockwell chipsets? I'm a USR fan. > That doesn't trigger the delay requirements in the SIO driver > comments because it emulates a UART instead of having one? > > That has a FIFO'ed UART? If it hasn't a REAL FIFO'ed UART I wouldn't buy it, And I sure wouldn't push it off on a customer. > That if it gets fried, can't fry my machine, because like my serial > ports, it includes optoisolators? Yup, Many. Even cheap K-Mart specials have optoisolators. But I agree, Some don't! I wouldn't buy them And I sure wouldn't sell it to one of my customers! > That internally does not float DTR open collector so it won't > answer the phone unless I set the DTR flag? Goes with the next question. > And that, by default, following POST, can be programmmed to have > a default DTR flag unset, so that the modem will not answer the > phone until my system is up so that the number will roll over > like its supposed to in case of system failure? Yup. > It's possible to make a pretty long list of external modems > which do this, mostly because RS232C interfaceing and serial > PORT post conditions are well known. Fake RS232C "UART->modem" > internal wiring is more suspect. > > A can only think of one modem that meets these requirements, > and I can tell you, they want my left testicle for it ($445). I don't consider that a left testicle. USR Couriers cost ~that! (Retail) > When things need to work, they *need* to *work*. Amen! > It's possible to get working internal modems; as a general rule > of thumb, however, external beats internal for quality, if only > because RS232C does not allow pins 4,5,6,8,and 20 to float open > collector; they are defined as being pulled down in the absence > of a definite state setting. The POST leaving the DTR off in > any decent BIOS without a specific UART setting to enable it is > just icing on the cake. > I don't understand what all this has to do with my prefrence of Internal over External. I didn't tell you to run Internal! Thats your choice! As it is mine to prefer Internal! I don't know how such a lame comment from me can brew into such a worthless debate! Lets discuss something where we all can learn something or improve FreeBSD and stop this useless exchange/waste of our time! I have a thousand questions about FreeBSD that I would love to get answered instead of wasting my time debating if a Internal or External modem is better! It all depends on the usage, Level of compentance<sp?> of the user! I have many customers that I would refuse to sell an external item to for the sole reason that I know they would be calling me telling me it is broke because they either didn't turn it on or the power cord came unplugged! (From the back of the device) -Enjoy Gary ~~~~~~~~~~~~~~~~ Improve America's Knowledge... Share yours The Borg... Where minds meet (207) 929-3848
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