Terminal for a telecommunications switching system having an add

Details Terminal for a telecommunications switching system having an add Terminal for a telecommunications switching system having an add

1987-01-23

1988-11-01

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Substation originated

379419, 379428, 379354, 340365VL, H04M 123

Patent

active

047825227

ABSTRACT:
A terminal of a telephone switchboard installation with one dialing and one service and/or input keyboard and one or more indicator device(s) and a cradle for the hand set. The terminal includes, on the upper side of the terminal a sliding part, which is formed by the upper side which accommodates the keyboards and sometimes includes an indicator device. In one position, the sliding part operationalizes an additional keyboard or indicator device which is located beneath it. This additional keyboard may be designed as a targeted dialing key set, an alpha-numerical input keyboard, etc., and in addition, the keyboard may be replaced with a bank of lamps indicating lines in use.

REFERENCES:
patent: 4533791 (1985-08-01), Read et al.
Cermetek Electronics, "A New Generation of Information Terminals", brochure, Apr. 1987.
Adkins et al., "Displayphone: Telephone and Terminal Combine in a Compact Desk-Top Unit", Telesis, 1982 Four, pp. 2-7.
"Displayphone in a Market Trial", Telesis, vol. 9, No. 3, 1982, p. 31.

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