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US 6,212,374 B1Granted
Disabling of echo cancelers after call startup
AssigneeParadyne Corporation
InventorsRobert E. Scott, E. Robert Lastinger, Jr.
Life of this patent
Estimating the term…
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AssigneeParadyne Corporation
InventorsRobert E. Scott, E. Robert Lastinger, Jr.
Estimating the term…
An echo canceler disabling system is associated with a cellular data communications device, such as a modem, which is utilized to communicate digital data over a cellular network for the purpose of enhancing digital data communications over the network. The echo canceler disabling system is configured to disable voice echo cancelers brought on-line during digital data transmission after call startup in order to prevent disruption of digital data communications by the voice echo cancelers. To deactivate the voice echo cancelers, the echo canceler disabling system is configured to transmit a tone at approximately 2100 Hz with 180 degree phase reversals to disable one or more echo cancelers brought on-line after the call startup. In architecture, the echo canceler disabling system includes a mechanism to detect a loss of signal synchronization, a mechanism to send an echo canceler disable tone, and a mechanism to send a retrain signal after the echo canceler disable tone is sent in order to reestablish signal synchronization.
A system comprising:
A system for disabling an echo canceler that is brought on-line after an initiation of a call, comprising:
A system for disabling an echo canceler that is brought on-line after an initiation of a call, comprising:
A method for disabling an echo canceler activated on-line in a cellular network after call startup during digital data transmission, comprising the steps of:
Dependencies are inferred from the claim text.