Digital voice conferencing apparatus in time division multiplex systems
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsJoshua L. Segal, Charles F. Sargent
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Abstract
A digital voice conferencing apparatus utilizing a time division multiplex system to process data packets from and to the participants of the conference call. The subscribers and the conference call originator utilize a time division multiplex (TDM) adapter to establish a conference call mode, to identify the members thereto, and to provide all the means for transmitting and receiving the voice packets to the conference members excepting each members own voice packet. A digital voice conferencing apparatus is located at each subscriber location and permits all subscribers who may be talking simultaneously to be understood.
Claims3
In a time division multiplex system having a unidirectional receive and transmit bus the improvement comprising:
- a plurality of distributed communication interfacing units, each of said plurality of distributed communication interfacing units connected between said receive and transmit bus to said time division multiplex system, each communication interfacing unit comprising in combination:
- a telephone means converting audio signals to an analog signal for transmission therefrom, said telephone means receiving analog signals for reconversion into audio signals,
- means for adapting said time division multiplex system, said adapting means connected between said receive and transmit bus, said adapter means connected to said telephone means to receive analog signals therefrom and to transmit analog signals thereto, said adapter means converting said analog signals from said telephone means to digital message packets, said adapter means transmitting said digital message packets on said transmit bus to said time division multiplex system, said adapter means receiving digital message packets from said time division multiplex system by means of said receive bus, said adapter means converting said digital message packet to an analog signal and applying said analog signal to said telephone means, and,
- a summing means connected between said telephone means and said adapter means, said summing means only summing the signals passing from said adapter means to said telephone means.
Dependencies are inferred from the claim text.