Multirate wire line modem apparatus

Multiplex communications – Wide area network – Packet switching

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Details

375 8, 370 29, 370 30, H04B 156, H04J 1500, H04L 5111

Patent

active

050051687

ABSTRACT:
Multirate wire line modem apparatus operable at either of two rates in either transmission or reception modes is provided according to the teachings of the instant invention. Full duplex operation and echo cancellation are utilized for both voice and data. Structurally an IOP processor acts as a system controller in controlling transmission and reception digital signal processors which provide the independent transmission and reception functions of the resulting multirate modem apparatus.

REFERENCES:
patent: 4425664 (1984-01-01), Sherman et al.
patent: 4455661 (1984-06-01), Qureshi
patent: 4908823 (1990-03-01), Haagens et al.

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