Talk:Teleprinter

message: The airline industry still uses teletype. Jigen III (talk) 04:47, 8 August 2010 (UTC)
replies: text: Can you provide any details? Which airlines, what type of teleprinter?  What is the connected network?  Dedicated network?  What are the speeds and codes?   Wa3frp (talk) 13:59, 8 August 2010 (UTC)
replies: text: The Aeronautical Fixed Telecommunication Network, which interconnects airports and air traffic control centers worldwide, has protocols defined in ICAO regulations.  It's backwards-compatible to the teleprinter era.    All the big stations went to X.400 email over TCP/IP years ago, and they are moving to an XML-based format.  AFTN today is usually a computer at one end talking to a computer at the other end, but with message formats from the teleprinter era.  It's possible that somewhere, at some backwater airport, somebody still has a mechanical teleprinter on the net.  But I don't know of any.  --John Nagle (talk) 17:03, 8 August 2010 (UTC)
replies: text: We type in messages in a computer and it prints out at the recipient station on a large dot matrix teleprinter (i.e. input via computer, output via teletype). For example, "SFOFFDL to ATLFFDL: Be aware pets on DL123, please transfer to DL456 upon arrival". We are also able to communicate between airlines. I don't know if frontline agents (employees that see passenger faces) have access to this system (since they always seem to prefer email), but "under-wing" agents use the system extensively, sometimes exclusively for important matters (missing bags, embargoes, high-value cargo). Everyone refers to it as "teletype" but I don't know what kind of network it is; I think it's dedicated since we can still receive even when the computers are down; I don't know if it's the AFTN above user mentioned. Might be this: Airline teletype system. Jigen III (talk) 08:51, 10 August 2010 (UTC)

text: The lede currently says "". Are these aviation TTYs still electromechanical or now fully electronic? John Nagle's above reply suggests the latter. If the latter, then maybe that should be noted, because earlier on, the lede describes teleprinters as electromechanical. —ReadOnlyAccount (talk) 10:03, 5 January 2024 (UTC)
thread_title:  Airlines 

message: There are two sounds associated with this technology. First, is the chatter of the teletype machine banging away at the paper on which it printed. This sounded rather like a shockingly fast typist. The other is the modem-like squeal and series of beeps these machines used over the wire or over the air when sending messages. Neither of those sounds is to be found here. -- Brothernight (talk) 20:33, 19 November 2011 (UTC)
replies: text: Sorry but the "squeal and beeps" had little to do with teleprinters per se for most of their history. Pure teleprinter circuits used no modems at all, only switched DC over metallic current loop circuits that ran all the way back to a central office; there were no tones. In the late 60s we did start to see TTYs such as ASR33s either with built-in modems, or attached to Bell 103 modems, used with timesharing services... but I wouldn't describe the sound as "squeal and beeps". Their tones were much simpler - just two-tone frequency-shift keying, one tone for mark and another for space. A pair of Bell 103s establishing a connection starts with one steady tone from the answering end, and then another, lower tone from the calling end. FSK as used over radioteletype is similar except that the comms were truly half-duplex and only a single of pair of tones were used for both directions. I believe that re. "squeal and beep" you are thinking of much later, faster modems with much more complex signaling. Such a sound file might belong in the article on modems, but not here. Jeh (talk) 00:12, 20 November 2011 (UTC)
thread_title:  The Sound 

message: About the time "Baudot" was changed to "ITA2", the word "ASCII" was also removed from 
: 
...partly because I have no doubt that ASCII was never introduced at all on five-level networks! 
However the model 33 did bring ASCII to Teletype Corp's product lineup, and I wonder: Was ASCII in e.g. computer applications really "never as popular" as ITA2 was in the five-level networks? How could we find out? Does the comparison even matter? I don't think so and I'm inclined to leave the statement as it is (of course I am; at present it's my edit) but... comments? Jeh (talk) 08:26, 15 August 2017 (UTC)
thread_title:  ASCII? 

message: One novel application of teletype were teletype projectors used on US Navy aircraft carriers in WWII. The system enabled messages/briefings to be transmitted to multiple pilots' ready rooms, where they were displayed by a projector. Its pretty interesting, but I'm not sure where to include it in the article. More info can be under 'miscellaneous' towards the bottom of this page. LittleDwangs (talk) 11:28, 21 June 2020 (UTC)
thread_title:  US Navy teletype projector 

message: If known, please add to this article... the maximum number of printable characters per line for various common width paper.  I did some quick searching and couldn't find this information, but I might have chosen the wrong words/phrases to search.  Thanks!  06:29, 18 March 2023 (UTC)
replies: text: ASR 33 was 72 characters wide. Don't know about the rest... Skyerise (talk) 19:50, 30 March 2023 (UTC)
thread_title:  Number of printable characters per line 

message: Google translate renders the heading as 'Digital Economy' and the body text as being about Telegram (software) --TedColes (talk) 16:28, 21 April 2024 (UTC)
thread_title:  Raqamli iqtisodiyot