grx0644@uoft02.utoledo.edu (Tony Schliesser) (10/10/90)
I have a question about desterm 2.00. What is the answerback option for?? No, not the VT id option, the answerback!! I know you can set it to some text string, but what is it for?? How does one cause this string to be sent? Any ideas??? Thanks, Tony
digdon@ug.cs.dal.ca (Mike Digdon) (10/10/90)
The answerback message is sent automatically when a connection with a remote computer has been established. I am not yet certain what you would use it for, but if I find out, I'll be sure to post a message here.
root@zswamp.fidonet.org (Geoffrey Welsh) (10/10/90)
> From: grx0644@uoft02.utoledo.edu (Tony Schliesser) > Message-ID: <1990Oct9.154255.1840@uoft02.utoledo.edu> > > I have a question about desterm 2.00. What is the answerback option for?? The VT-102 standard includes provision for an inquiry command beyond the normal terminal ID. This is often used to identify the manufacturer and/or model of a terminal which emulates DEC codes. I don't know of any real reason for it, except maybe as a way for DEC to find out who's emulating their equipment... -- UUCP: watmath!xenitec!zswamp!root | 602-66 Mooregate Crescent Internet: root@zswamp.fidonet.org | Kitchener, Ontario FidoNet: SYSOP, 1:221/171 | N2M 5E6 CANADA Data: (519) 742-8939 | (519) 741-9553 No one pays me enough to represent any opinions but my own.
dflahert@tagore.helios.nd.edu (Dennis Flaherty) (10/11/90)
In article <243.2713492B@zswamp.fidonet.org> root@zswamp.fidonet.org (Geoffrey Welsh) writes: } } > From: grx0644@uoft02.utoledo.edu (Tony Schliesser) } > Message-ID: <1990Oct9.154255.1840@uoft02.utoledo.edu> } > } > I have a question about desterm 2.00. What is the answerback option for?? } } The VT-102 standard includes provision for an inquiry command beyond the } normal terminal ID. This is often used to identify the manufacturer and/or } model of a terminal which emulates DEC codes. } } I don't know of any real reason for it, except maybe as a way for DEC to } find out who's emulating their equipment... Desterm correctly responds to qterm(l) on UNIX systems and SET TERM/INQ on VMS systems (if there are any left). -- Dennis Flaherty dennisf@ndcvx.cc.nd.edu U of Notre Dame Dept. of Electrical Engineering Notre Dame *tells* me what opinions to have.
grx0644@uoft02.utoledo.edu (10/11/90)
In article <1990Oct10.143352.9428@cs.dal.ca>, digdon@ug.cs.dal.ca (Mike Digdon) writes: > The answerback message is sent automatically when a connection with a remote > computer has been established. I am not yet certain what you would use it for, > but if I find out, I'll be sure to post a message here. I posted the origional question and after posting a message to sys.dec, they informed me that it was the character (05%)......So thanks for all the help and interest...... Happy programming!
prindle@nadc.nadc.navy.mil (Frank Prindle) (10/11/90)
Answerback is one of those historical dinosaurs which persists to this day for compatibility. In olden days of telecomputing when terminals were largely mechanical and ran at the blinding speed of 10 characters/second or less, each terminal was pre-programmed (by The Phone Company, since they held a monopoly on telecom equipment back then) to transmit its phone number or some other identification whenever it received an ASCII ENQ (^E, enquiry) character (in pre-ASCII days, this was called WRU - i.e. Who aRe yoU?). The purpose was so that the receiver of a call could unconditionally tell who called (The Phone Company always were a suspicious lot). Because this code remains reserved for this function in the current standards for ASCII encoding, terminals (and terminal emulators) to this day must support answerback, though we are now free (thanks Carterphone!) to program any sort of cute saying we want in the answerback message. Since its original purpose is totally destroyed, it is typically totally ignored. But you can still make any ANSI standard terminal transmit its answerback by sending it a ^E if you can think of any practical purpose for it! End history lesson, Frank Prindle Prindle@NADC.navy.mil
fred@cbmvax.commodore.com (Fred Bowen) (10/13/90)
In article <243.2713492B@zswamp.fidonet.org> Geoffrey Welsh writes: > > From: grx0644@uoft02.utoledo.edu (Tony Schliesser) > > > > I have a question about desterm 2.00. What is the answerback option for?? > >normal terminal ID. This is often used to identify the manufacturer and/or >model of a terminal which emulates DEC codes. > > I don't know of any real reason for it, except maybe as a way for DEC to >find out who's emulating their equipment... I use it simply as an extra "function key". The answerback message is transmitted on a VT100 upon receipt of ^E *or* the user typing ^BREAK. So I define it to be a particular login command, and press ^BREAK to invoke it. I do this on an actual VT100 or my VT100-128; I have not tried to do this using DESterm. -- Fred Bowen uucp: {uunet|rutgers|pyramid}!cbmvax!fred domain: fred@cbmvax.commodore.com tele: 215 431-9100 Commodore Electronics, Ltd., 1200 Wilson Drive, West Chester, PA, 19380