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Multiple device data transfer utilizing a multiport memory with opposite oriented memory page rotation for transmission and reception
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Rate control of channels on a time division multiplex bus
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Method and apparatus for TDM interrupt transmissions between multiple devices and a processor
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Method and apparatus for using parasitic capacitances of a printed circuit board as a temporary data storage medium working with a remote device
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Method of distributed call control in a distributed transit PBX system
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Method of adding a new PBX and new PBX port to an existing PBX network
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PBX networking with quality of service control
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Digital signal processing unit using digital signal processor array with recirculation
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Distributed transit private branch exchange
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Multi-processor system
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Hardware memory write lock circuit
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