Telephonic communications – Multi-line or key substation system with selective switching... – With special service
Patent
1987-06-01
1990-06-26
Ng, Jin F.
Telephonic communications
Multi-line or key substation system with selective switching...
With special service
379202, 379205, 379206, 370 62, H04M 356, H04M 158
Patent
active
049378562
ABSTRACT:
A conferencing bridge provides conferencing capabilities for a plurality of input lines and for a plurality of output lines. The conferencing bridge has a signal processor which processes the audio information transferred between the input lines and the output lines. A plurality of codecs analog to digital conversion and digital to analog conversion for interfacing the signal processor to the plurality of input lines and output lines. A control processor is operatively connected to the signal processor and controls and operation of the signal processor as well as the conferencing bridge through number codes that are inputted to the conference bridge via the telephone key pad. A tone converter converts the inputted tones to digital information to which the control processor will respond. The signal processor provides not only identification of the telephone line on which a speaker is talking but also performs an amplitude adjustment so that there is a minimum loss involved for the conferencing network.
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DSP Technology Corp, "Six Party Teleconferencing", (Reader Service Announcement), Teleconnect, May 1986.
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K. E. Martersteck et al., "The 5ess Switching System:Introduction", AT&T Technical Journal, vol. 64, No. 6, Part 2, Jul.-Aug. 1985, pp. 1305-1315.
Publication: Telephony, Nov. 18, 1985, p. 69.
Chan Wing F.
Ng Jin F.
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