Process and terminal for video telephony permitting acceptance,

Details Process and terminal for video telephony permitting acceptance, Process and terminal for video telephony permitting acceptance,

1994-01-18

1995-09-05

Chan, Wing F.

Television

Two-way video and voice communication

User positioning

379 94, 3701101, H04M 1100

Patent

active

054482860

ABSTRACT:
In order to establish a videophone communication from a calling terminal to a called terminal, a communication is established on a first TBCC channel, then a ringing tone is emitted automatically, from the called terminal, to the calling terminal on the first channel and a call is emitted to the telephone set on the second channel B; in response to the unhooking of the telephone handset the two channels are automatically linked from the called terminal; and, in response to a code from the telephone set, the emission is caused of a waiting tone to the calling terminal and a ringing to the called videophone terminal; in the event of acceptance on the part of the subscriber of the called videophone terminal, the establishment of communication is automatically continued in response to the hooking of the set.

REFERENCES:
patent: 5371534 (1994-12-01), Dagdeviren et al.
IEEE Transactions On Consumer Electronics, vol. 36, No. 3, Aug. '90 New York, U.S. pp. 753-757--T. Naganawa et al. "A study of Audio communication Devices for ISDN"--p. 754, right col. alinea 3-4; left col. alinea 4; FIG. 3--p. 757, lef col., alinea 2-3; FIG. 11.
International Switching Symposium 1987, Session A11, Paper 6, vol. 4/4 Mar. 20, '87, Phoenix, Ariz., U.S.--pp. 875-879--P. Lyhne et al "ISDN-A Basis for Enhanced And New Services For The Next Decades" p. 5, left column; FIG. 4.

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