Full Disclosure mailing list archives
RE: Ancient Trivia: +++ath0
From: <Glenn_Everhart () bankone com>
Date: Thu, 18 Mar 2004 13:15:12 -0500
The <delay>+++<delay> scheme, using time delays, was more like the old break signal, not really like a string that would not transmit...at least on modems that used the delay. You could sometimes kinda/sorta get something like that to work by switching to 110 baud and sending nulls, then switching back to whatever rate you were using, but normal protocols that sent text would very rarely have packet boundaries just at either end of the sequence. Also the modems let you set the break length and the character to use in case "+++" was inconvenient for some reason. Certainly anything in the ASCII character set other than null would have been ok. Don't know about null (or rubout for that matter). -----Original Message----- From: Luke Scharf [mailto:lscharf () aoe vt edu] Sent: Thursday, March 18, 2004 8:49 AM To: full-disclosure () lists netsys com Subject: Re: [Full-disclosure] Ancient Trivia: +++ath0 On Wed, 2004-03-17 at 21:30, cstone wrote:
* = Hayes has a patent on a scheme to protect against unintentional triggering of the escape sequence; on their modems, you have to wait a specific amount of time before and after the +++ before issuing a command.
Doh! I thought that there was an easier way to escape the escape sequence. Too much Unix -- '\+\+\+' :-) But, still, isn't a string of characters that the modem won't transfer something that the communications system on a PC should handle? Anyway, I'm starting to get nostalgic about the old BBS days -- maybe I should put my old one up again? But, they just haven't the same since I started using the WWW, and telnet BBSs just don't do it for me. -Luke -- Luke Scharf, Systems Administrator Virginia Tech Aerospace and Ocean Engineering _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html ********************************************************************** This transmission may contain information that is privileged, confidential and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you ********************************************************************** _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
Current thread:
- Re: Ancient Trivia: +++ath0, (continued)
- Re: Ancient Trivia: +++ath0 Cael Abal (Mar 18)
- Re: Ancient Trivia: +++ath0 Nick FitzGerald (Mar 17)
- Re: Ancient Trivia: +++ath0 Harry Hoffman (Mar 17)
- Re: Ancient Trivia: +++ath0 KF (Mar 17)
- Re: Ancient Trivia: +++ath0 Harry Hoffman (Mar 17)
- Re: Ancient Trivia: +++ath0 Paul Szabo (Mar 17)
- Re: Ancient Trivia: +++ath0 Luke Scharf (Mar 18)
- RE: Ancient Trivia: +++ath0 Cowles, Robert D. (Mar 18)
- RE: Ancient Trivia: +++ath0 Dave Horsfall (Mar 18)
- RE: Ancient Trivia: +++ath0 Radule Soskic (Mar 18)
- RE: Ancient Trivia: +++ath0 Dave Horsfall (Mar 18)
- Re: Ancient Trivia: +++ath0 3APA3A (Mar 18)
- RE: Ancient Trivia: +++ath0 Glenn_Everhart (Mar 18)