Multiplex communications – Wide area network – Packet switching
Patent
1982-12-16
1985-10-29
Brown, Thomas W.
Multiplex communications
Wide area network
Packet switching
370 62, H04M 356
Patent
active
045502242
ABSTRACT:
In a telecommunications conference system, a warning tone is applied to a conference bridge to inform the participants that another conferee is about to be included in the conference. The conferee is only added after a brief interval so as not to disrupt the existing conference.
REFERENCES:
patent: 2333140 (1943-11-01), Allen
patent: 3912874 (1975-10-01), Botterell et al.
patent: 4086438 (1978-04-01), Kahn et al.
patent: 4475189 (1984-10-01), Herr et al.
"Touch-Tone Signaling on Private Telephone Networks", R. J. Angner, Bell Laboratories Record, Dec. 1970, pp. 337-341.
AT&T Bell Laboratories
Brown Thomas W.
Davis Charles H.
Godlewski Richard J.
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