Device for adapting narrowband voice traffic of a local access n

Details Device for adapting narrowband voice traffic of a local access n Device for adapting narrowband voice traffic of a local access n

1995-03-21

1997-04-22

Chin, Wellington

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370404, 370466, 370468, 370477, H04L 1266

Patent

active

056234910

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).

REFERENCES:
patent: 5287348 (1994-02-01), Schmidt
patent: 5301189 (1994-04-01), Schmidt
patent: 5305308 (1994-04-01), English et al.
patent: 5327421 (1994-07-01), Hiller et al.
patent: 5375118 (1994-12-01), Rao et al.
patent: 5436899 (1995-07-01), Fujino et al.
patent: 5457684 (1995-10-01), Bharucha et al.
patent: 5483527 (1996-01-01), Doshi et al.

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