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- Path: sparky!uunet!mcsun!fuug!demos!kiae!glas!demos!qiclab.scn.rain.com!leonard
- From: leonard@qiclab.scn.rain.com
- Newsgroups: comp.dcom.modems
- Date: 18 Jul 92 18:23 MDT
- Subject: Re: Boom! You're Dead.
- Sender: Notesfile to Usenet Gateway <notes@glas.apc.org>
- Message-ID: <1992Jul18.142320.4269@qiclab.scn>
- References: <2043@tymix.tymnet.com>
- Nf-ID: #R:tymix.tymnet.com:2043:1992Jul18.142320.4269@qiclab.scn:2108883773:001:2407
- Nf-From: qiclab.scn.rain.com!leonard Jul 18 18:23:00 1992
- Lines: 52
-
-
- tnixon@hayes.com writes:
-
- >In article <2043@tymix.Tymnet.COM>, drawson@sagehen.Tymnet.COM (Dick
- >Rawson) writes:
-
- >> Say Toby, can you explain the full-age ad in Network World picturing a
- >> time bomb and the caption,
- >>
- >> "Tick, Tick, Tick. Boom! You're Dead."
-
- >Sure. It is referring to some of the modems currently on the market
- >that use what is call "TIES", a "time independent escape sequence".
- >Such modems will escape from online state to command state whenever
- >you send a certain fixed pattern of characters, regardless of
- >whether or not there is a "guard time" (no characters transmitted)
- >before and after the sequence. Of course, this means that there is
- >a fixed probability that your modem will inadvertently escape when
- >you're transmitting random data (such as a compressed file) or any
- >file that happens to mention the given character sequence (amazingly
- >enough, modems that implement TIES most likely can't even transmit
- >the file containing their own modem manual, since it has the
- >sequence in it!) Retransmitting the file will not fix the problem,
- >because it will escape every time, and no existing comm software is
- >smart enough to recover from this problem. Anyway, by not having
- >the guard time, the modem will inadvertently and unexpectedly
- >escape, "blowing up" file transfers, and most users will have a very
- >hard time figuring out what happened.
-
- >All of these problems can be avoided by using modems that
- >incorporate the Hayes Improved Escape Sequence with Guard Time,
- >which most modems do. The ads are an educational campaign to let
- >people know about this situation, and to introduce the "icon" (which
- >you see in the ad) which will be appearing on the packaging of
- >modems that implement the standard technique.
-
- Well, aside from the bit about "Hayes Improved Escape Sequence" with
- "Guard Time" as a description for a feature that is over a decade old,
- it *does* sound like somebody was asleep at the switch.
-
- They actually *don't check* for anything but the tripled character?
- *Unbelievable*!
-
- BTW, you seem to imply that the makers of these brain-dead modems are
- actually pushing this bug as a *feature*? Is that true?
-
- --
- Leonard Erickson leonard@qiclab.scn.rain.com
- CIS: [70465,203] 70465.203@compuserve.com
- FIDO: 1:105/56 Leonard.Erickson@f56.n105.z1.fidonet.org
- (The CIS address is checked daily. The others infrequently)
-
-