Pulse or digital communications – Transceivers – Modems
Reexamination Certificate
2003-07-16
2009-08-04
Tran, Khanh C (Department: 2611)
Pulse or digital communications
Transceivers
Modems
C370S252000
Reexamination Certificate
active
07570686
ABSTRACT:
Upon detection of a trigger, such as the exceeding of an error threshold or the direction of a user, a diagnostic link system enters a diagnostic information transmission mode. This diagnostic information transmission mode allows for two modems to exchange diagnostic and/or test information that may not otherwise be exchangeable during normal communication. The diagnostic information transmission mode is initiated by transmitting an initiate diagnostic link mode message to a receiving modem accompanied by a cyclic redundancy check (CRC). The receiving modem determines, based on the CRC, if a robust communications channel is present. If a robust communications channel is present, the two modems can initiate exchange of the diagnostic and/or test information. Otherwise, the transmission power of the transmitting modem is increased and the initiate diagnostic link mode message re-transmitted to the receiving modem until the CRC is determined to be correct.
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Krinsky David M
Pizzano, Jr. Robert Edmund
Aware Inc.
Sheridan & Ross P.C.
Tran Khanh C
Vick Jason H.
LandOfFree
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