| 摘要 |
A PCM call processing apparatus includes an ATM processing unit for processing voice packets from an ATM switching unit of a mobile switching center, a traffic pool for processing PCM voice data, a PCM call processor interposed between the ATM processing unit and the traffic pool for performing selective transcoding operations based on data type, a network interface for connecting the traffic pool to a PSTN, and an IWU controller for controlling the ATM processing unit, the traffic pool, the PCM call processor, and the network interface. The PCM call processor includes a transcoder for transcoding a voice packet from the ATM processing unit and the voice data from the traffic pool, a realignment unit for realigning PCM voice data from the traffic pool, a reference processor for generating a synchronization signal based on a synchronization and clock signals from the ATM processing unit and the traffic pool, and a PCM call controller for controlling the transcoder and realignment unit based on a call control signal from a vocoder controller. A PCM call processing method includes receiving a transcoding request and a call control signal, determining whether the call control signal is for PCM data transmission or AMR packet transmission, configuring a PCM data transmission channel when the call control signal is a PCM data transmission control signal, realigning the received PCM data in a timeline, and transmitting the received data to an ATM processing unit.
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