escape sequence


Also found in: Legal, Acronyms, Wikipedia.

escape sequence

(character)
(Or "escape code") A series of characters starting with the escape character (ASCII 27). Escape sequences are often used to control display devices such as VDUs. An escape sequence might change the colour of subsequent text, reassign keys on the keyboard, change printer settings or reposition the cursor. The escape sequences of the DEC vt100 video terminal have become a de facto standard for this purpose.

The term is also used for any sequence of characters that temporarily suspends normal processing of a stream of characters to perform some special function. For example, the Hayes modem uses the sequence "+++" to escape to command mode in which characters are interpreted as commands to the modem itself rather than as data to pass through.

escape sequence

(1) A text command that begins with an escape code. Printers are often commanded by escape sequences. See escape code.

(2) In a modem, a unique sequence of characters that precedes a command. It allows modem commands (dial, hang up, etc.) to be transmitted with the data. See TIES and Hayes Smartmodem.
References in periodicals archive ?
Hayes has now entered into approximately 40 licensing arrangements or other settlements involving the Hayes '302 Escape Sequence Patent.
The Hayes escape sequence technology, first introduced in Hayes Smartmodem products in 1981, is now a data communications feature acknowledged as an industry standard for modems, ISDN and other data communications applications, with over 26 million units shipped to date worldwide.
That Court also found that the evidence of the reliability of TIES was in dispute and that Sierra had failed to provide a sufficient reason to prohibit Hayes from stating that TIES is an unreliable escape sequence.
a Minnesota modem manufacturer who has sued Hayes several times, filed a motion for preliminary injunctive relief requesting that the Minnesota Court halt Hayes advertising concerning escape sequence technology and halt the dissemination of the test kit offered in the Hayes ad.
The Court noted that the injunction did not prevent Hayes from presenting a comparison between the Hayes Patented Escape Sequence With Guard Time Mechanism and the TIES escape sequence nor from "redesigning" the test kit.
We see this as a clear victory over the attempts of some manufacturers to keep customers in the dark about the issues of the reliability of escape sequence technology," said Dennis C.
Hayes continues to incorporate the Patented Improved Escape Sequence With Guard Time Mechanism in all of its modem and ISDN products which use the Hayes Standard AT Command Set.
Zenith Data Systems recently selected the patented Hayes Escape Sequence technology for use in modems sold as accessories to Zenith Data Systems' Z-NOTE notebook computers introduced in April.
Licensing of the Hayes '302 Patent at no cost to our customers ensures installed-base compatibility and avoids unsatisfactory performance brought on by using alternative escape sequences.
We were surprised to learn that Multi-Tech had abandoned the proven, reliable escape sequence technology used in all Hayes modems since 1981 and has now incorporated the TIES escape sequence into its modems.
that Hayes' recent education campaign about modem escape sequences and the related Test Kit are causing Multi-Tech to lose sales.
The InterLynx/3287Plus asynchronous passthrough feature eliminates switching and escape sequences, permitting the active sharing of an ASCII parallel printer between the mainframe and PC or LAN.