Communication networks including flash hook detectors and...

Telephonic communications – Special services – Service trigger

Reexamination Certificate

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Reexamination Certificate

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07920687

ABSTRACT:
A communication network that includes a flash hook detector and a communication device is operated by detecting a flash hook of the communication device at the flash hook detector. A signal is transmitted from the flash hook detector to the communication network responsive to detecting the flash hook. The flash hook is processed in the communication network.

REFERENCES:
patent: 7283517 (2007-10-01), Yan et al.

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