Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of hybrid or echo suppressor or canceller
Patent
1997-02-20
2000-06-20
Ometz, David L.
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Of hybrid or echo suppressor or canceller
379406, 379410, H04M 124, H04M 300
Patent
active
060786450
ABSTRACT:
A modem monitor for monitoring full duplex communications comprises one receiver for each data stream and an echo canceler for canceling "far" echo. Prior to each receiver decoding the data stream it is designed to monitor, it replicates an echo expected to be found in its received data stream from a sample of each of the other predecoded data streams. The echo canceler then subtracts the expected echo from the received data stream to remove all far echoes caused by the other data streams. The echo canceled data stream is then decoded. The monitor can also include a data communications network interface and a sample rate converter operating with the PSTN for converting from the network transmission rate to the data transmission rate.
REFERENCES:
patent: 4162378 (1979-07-01), Baudoux et al.
patent: 4694450 (1987-09-01), Staab
patent: 4799214 (1989-01-01), Kaku
patent: 4825459 (1989-04-01), Farrow et al.
patent: 4987569 (1991-01-01), Ling et al.
patent: 5280473 (1994-01-01), Rushing et al.
patent: 5323459 (1994-06-01), Hirano
patent: 5351287 (1994-09-01), Bhattacharyya et al.
patent: 5353280 (1994-10-01), Ungerbock
patent: 5490199 (1996-02-01), Fuller et al.
patent: 5751796 (1998-05-01), Scott et al.
patent: 5764694 (1998-06-01), Rahamim et al.
patent: 5799010 (1998-08-01), Lomp et al.
patent: 5892757 (1999-04-01), Norrell et al.
Cai Lujing
Cohen Herbert B.
Rogoszewicz Richard
Wang Mingjie
Fields Kenneth W.
Lucent Technologies - Inc.
Ometz David L.
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