Pulse or digital communications – Transceivers – Modems
Reexamination Certificate
2007-05-22
2007-05-22
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Transceivers
Modems
C375S224000, C370S503000, C370S505000, C370S282000
Reexamination Certificate
active
09818252
ABSTRACT:
A system is provided for synchronizing a PSTN clock and a DSL clock. The system comprises a PSTN interface for transmitting and receiving voiceband samples, a data DSL transceiver for modulating and demodulating data to and from DSL samples, a synchronization circuit for synchronizing the voiceband samples and the data samples, and a converter for converting the synchronized voiceband and DSL samples between analog and digital formats. The synchronization circuit synchronizes the voiceband and the data samples for conversion by the same converter.
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McClennon Scott
Rivaud Dan
Stacey Fred
Ciena Corporation
Fan Chieh M.
Merek & Blackmon & Voorhees, LLC
Zheng Eva
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