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发明授权
US07529253B2 IP packet ready PBX expansion circuit for a conventional personal computer with expandable, distributed DSP architecture 失效
用于具有可扩展分布式DSP架构的常规个人计算机的IP数据包就绪PBX扩展电路

IP packet ready PBX expansion circuit for a conventional personal computer with expandable, distributed DSP architecture
摘要：
A personal computer includes a PBX control program and one or more switch cards located in expansion board slots. The one or more switch cards are coupled to one or more port expansion units (PEU), which are coupled to telecommunication lines out to the various extension phones at the customer premises. Each PEU contains its own digital signal processor (DSP) so that distributed digital signal processing may be implemented to avoid any bottlenecks. One master PEU is coupled to a switch card by a time division multiplexed (TDMA) bus as well as a packet switched control bus, and all the other PEUs, if any, are coupled to the master PEU by extensions of the TDMA and packet switched buses. The TDMA bus carries PBX real time conversations while the packet switched bus carries control information, voicemail outbound message data packets, and inbound voicemail data packets.
摘要（中）：

个人计算机包括一个PBX控制程序和位于扩展板插槽中的一个或多个交换机卡。 一个或多个开关卡耦合到一个或多个端口扩展单元（PEU），该端口扩展单元（PEU）在电话线路处连接到客户驻地处的各种分机电话。 每个PEU都包含自己的数字信号处理器（DSP），从而可以实现分布式数字信号处理，以避免任何瓶颈。 一个主PEU通过时分多路复用（TDMA）总线以及分组交换控制总线耦合到交换机卡，并且所有其他PEU（如果有的话）通过TDMA和分组交换的扩展耦合到主PEU 巴士 TDMA总线承载PBX实时对话，而分组交换总线承载控制信息，语音邮件出站消息数据分组和入站语音邮件数据分组。

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