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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United States of America Patent
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Apr 22, 1997
Grant Date -
N/A
app pub date -
Mar 21, 1995
filing date -
Mar 21, 1995
priority date (Note) -
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Abstract
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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