System and method for performing telephone line-in-use detection

Details System and method for performing telephone line-in-use detection System and method for performing telephone line-in-use detection

1999-01-04

2000-06-13

Chan, Wing F.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379 9307, H04M 1100

Patent

active

060758457

ABSTRACT:
The invention is directed to multi-line data exchange systems. The invention comprises one or more telephony devices, each coupled to one or more telephone communication lines, such as a standard telephone line, T1 line, T3 line, coaxial cable, or fiber optic line. The telephony devices are equipped with data communication interfaces. These interfaces allow the telephony devices to operate on more than one telephone communication line. The telephone communication lines operate on several bandwidths, including an audio bandwidth. The telephony devices can communicate among themselves apart from the audio bandwidth of the telephone communication lines. When another telephony device is activated or ceases use on one of the telephone communication lines, the telephony devices detect this event and communicate information on the usage of the telephone communication line on the telephone communication lines at a bandwidth other than the audio bandwidth used in voice communications.

REFERENCES:
patent: H1175 (1993-04-01), Giorgio
patent: 5506891 (1996-04-01), Brown
patent: 5535265 (1996-07-01), Suwandhaputra
patent: 5841840 (1998-11-01), Smith et al.
Computer Dictionary by Microsoft Press, 2nd edition, copyright 1994, pp. 162, 265.

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