[GreenKeys] Teletype and Bell Apparatus Codes

[Michael Kley]

 Hi Nick,
Maybe the attached document, a partial Teletype/Bell Code cross reference, will be useful to this project. I haven't found this document anywhere on the net or on your site, and have only these six pages. If anyone has a copy of the Teletype document E.S.I  4.002, I'd like to know what it is and see a complete copy. Sorry about the file size, I'm a novice scanner!Thanks,Mike Kley

    On Thursday, January 22, 2026 at 08:50:38 AM EST, Nick England via GreenKeys <greenkeys at mailman.qth.net> wrote:   

 I’ve got a table listing the various Teletype codes (BK, LLB, UCC, etc.) with the corresponding Bell System code (28C, etc.). I’ve mostly been filling in M28 info but will add others when I come across them. Additions and Corrections are welcomed and appreciated. https://www.navy-radio.com/tty/apparatus.htm
Cheers,
Nick England K4NYW
www.navy-radio.com
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