Telephone exchange apparatus with facsimile broadcasting facilit

Details Telephone exchange apparatus with facsimile broadcasting facilit Telephone exchange apparatus with facsimile broadcasting facilit

1993-05-19

1996-06-04

Chan, Jason

Telephonic communications

Telephone line or system combined with diverse electrical...

To produce visual-graphic copy

379 93, 379 94, 379 98, H04M 1100

Patent

active

055240488

ABSTRACT:
In a telephone exchange apparatus or a facsimile data broadcasting apparatus incorporating facsimile communication facility for broadcasting image data to a plurality of facsimile apparatuses, image data is concurrently broadcasted by sharing a single facsimile modem. In this case, the apparatus has (1) an arrangement wherein transmission of image data is assigned to the facsimile modem, and transmission/reception of control signals is assigned to a plurality of V.21 modems corresponding in number to facsimile apparatuses as broadcasting destinations, (2) an arrangement wherein transmission of image data and control signals is assigned to the facsimile modem, and reception of control signals is assigned to a plurality of V.21 demodulators corresponding in number to facsimile apparatuses as broadcasting destinations, and (3) an arrangement wherein transmission of image data and control signals is assigned to the facsimile modem, and reception of control signals is assigned to a plurality of V.21 demodulators fewer than the facsimile apparatuses as broadcasting destinations by adding a V.21 demodulator switching facility.

REFERENCES:
patent: 4589111 (1986-05-01), Adachi
patent: 4760458 (1988-07-01), Watanabe et al.
patent: 4785355 (1988-11-01), Matsumoto
patent: 4998249 (1991-03-01), Bennett et al.
patent: 5027400 (1991-06-01), Baji et al.
patent: 5159465 (1992-10-01), Maemura et al.
patent: 5170266 (1992-12-01), Marsh et al.
patent: 5185784 (1993-02-01), Nashimoto
patent: 5189525 (1993-02-01), Kotani
patent: 5257112 (1993-10-01), Okada

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