Versatile communication device with a facsimile function and...

Details Versatile communication device with a facsimile function and... Versatile communication device with a facsimile function and...

2006-01-03

2006-01-03

Kuntz, Curtis (Department: 2643)

Telephonic communications

Multi-line or key substation system with selective switching...

Detail of hold circuitry

C379S162000

Reexamination Certificate

active

06983041

ABSTRACT:
In a versatile communication device having a telephone function and a facsimile function, an erroneous detection of an on-hold melody as a control signal, such as a calling tone (CNG) signal, is prevented when the on-hold melody is played during an on-hold period of the telephone, thereby preventing the device from mistakenly switching connection to the facsimile function during the on-hold period. Further, the on-hold melody containing a signal component of the CNG signal or other control signal is prevented from sending to the remote device, so the remote device provided with a facsimile function does not switch to a facsimile mode during the on-hold status of the voice communication.

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patent: 2004/0052348 (2004-03-01), Yoshitani
patent: 0 541 087 (1993-05-01), None
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