DEC VT220 Technical Manual page 200

Keyboard
General
Keypad
Key size
Key spacing
Numeric keypad
Function keys
Visual indicators
Audible signals
Keyclick:
Bell:
MUltiple bell:
105 key detachable unit with a 1.8 m
(6 ft) coiled cord with a 4-pin
telephone-type modular connector.
Word processing and data processing
versions available in 15 languages
Sculptured key array_ Matte texture
finish keys. Home row key height
30 mm (1.18 in) above desk top
12.7 mm (0.5 in) square
19 mm (0.75 in) center-to-center
(single width )
18 keys
36 keys, firmware and software
dr
i
ven
4 LED indicators: hold, lock, wait,
and compose
Audible feedback for each keystr
Sounds when BEL character received,
when 8 characters from right margin
and for compose errors
Sounds on error in set-up, save, or
recall operation.
14,-3