Telex 270 Keyboards
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 | |
| FCC ID | None |
|---|---|
| Branding | Telex Computer Products Inc |
| Manufacturer | Telex Computer Products Inc |
| Layouts | 3278 |
| Keyswitches | Micro Switch SD Series |
| Keycaps | Double-shot |
| Interface | Parallel |
The "Telex 270 Keyboards" refers to a range of terminal keyboards used with the Telex Terminal Communications 270 terminal family; a clone of the IBM 3270 terminal family. These keyboards use Micro Switch SD Series hall effect switches and double-shot keycaps.
Contents
Description
The Telex 270 Information Display System is a line of terminals that are software and hardware compatible with the IBM 3270 family. The styling of the displays and keyboards followed that of their IBM counterparts. The 270 was designed as a lower cost solution. The keyboards achieved lower cost by using plastic case materials and Micro Switch SD Series switches.
Variants
Telex documentation indicates several keyboards were available with the different terminals in the 270 family. These included:[1]
For 276-2/-10
- EBCDIC Typewriter w/ 24 PF Keys
- EBCDIC Data Entry
- EBCDIC Data Entry w/ Keypunch layout
- EBCDIC Typewriter w/ Numeric Pad
- EBCDIC Typewriter w/ Function Pad
For 275-2
- EBCDIC Data Entry
- EBCDIC/ASCII w/ Numeric Pad
- EBCDIC Data Entry w/ Keypunch Layout
- EBCDIC/ASCII w/ Function Pad
- Operator Console or Check Processing
- Upper/lower Case Character Set
For 277D
- EBCDIC Data Entry
- EBCDIC Data Entry w/ Keypunch Layout
- EBCDIC Typewriter w/ Numeric Pad
- EBCDIC Typewriter w/ Numeric Pad and 12 PF Keys
- EBCDIC Typewriter w/ Program Function Keys
- Operator Console or Check Processing
- ASCII Typewriter w/ Numeric Pad
- ASCII Typewriter w/ Function Pad
For 278-1/-2/-3/-4/-5
- EBCDIC Typewriter w/ 24 Program Function Keys
- EBCDIC Typewriter w/ 12 Program Function Keys
- EBCDIC Data Entry
- EBCDIC Data Entry w/ Keypunch layout
- EBCDIC Typewriter w/ Numeric Pad
- ASCII Typewriter w/ 12 Function Keys
- ASCII Typewriter w/ Numeric Pad
Gallery
278 Typewriter with Numeric Pad
PN: 952003-222
The switches used are:
| Image | Code | Type | Usage |
|---|---|---|---|
 |
4B3E | Momentary stepped 2.5 oz 3-pin | All keys except space and numeric keypad zero |
 |
6B1D | Support (stepped) 1.1 oz dummy | Numeric keypad zero stabiliser (no keystem) |
 |
4B1E | Momentary stepped 1.1 oz 3-pin | Space bar, right-hand end |
 |
4B1D | Momentary stepped 1.1 oz dummy | Space bar, left-hand end |
External links
- 1000 BiT — Telex Computer Products Brochure
References
- ↑ bitsavers — Telex 270 Information Display System
