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DEVICE FOR ADAPTING NARROWBAND VOICE TRAFFIC OF A LOCAL ACCESS NETWORK TO ALLOW TRANSMISSION OVER A BROADBAND ASYNCHRONOUS TRANSFER MODE NETWORK
DEVICE FOR ADAPTING NARROWBAND VOICE TRAFFIC OF A LOCAL ACCESS NETWORK TO ALLOW TRANSMISSION OVER A BROADBAND ASYNCHRONOUS TRANSFER MODE NETWORK
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机译:适应本地访问网络的窄带语音业务以允许在宽带宽带异步传输模式网络上传输的设备
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摘要
A voice adaptation device (18) provides an interface between a narrowband local access network and a broadband asynchronous transfer mode (ATM) backbone network (16). The voice adaptation device (18) includes a T1/E1 network adaptor (50) that converts T1/E1 signals carrying narrowband voice traffic into an ATM cell format. The T1/E1 network adaptor (50) also performs echo cancelling, voice enhancement, digital voice protocol conversion, and compression/decompression on the narrowband voice traffic. The voice adaptation device (18) also includes a synchronous optical network formatter (52) that places ATM cells generated by the T1/E1 network adaptor (50) into synchronous optical network signals. The synchronous optical network signals are transmitted across the broadband ATM backbone network (16).
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