Automatic signaling-type indicator for use in subsequent interac

Details Automatic signaling-type indicator for use in subsequent interac Automatic signaling-type indicator for use in subsequent interac

1993-07-19

1995-05-16

Dwyer, James L.

Telephonic communications

Plural exchange network or interconnection

Connection call model

379201, 379283, 379207, 379230, H04M 364, H04M 342

Patent

active

054168350

ABSTRACT:
Call setup time is reduced by automatically (1) identifying the type of signaling used by a caller to communicate with a central office, and (2) providing an indication of the signaling type to telephone switches or databases that will participate in routing and processing the telephone call. Dual Tone Multifrequency (DTMF) detectors located at a central office of a local exchange carrier detect whether a caller is using DTMF signaling. The local central office includes this information in a signaling message provided, for example, to interexchange carriers and other service providers which will use DTMF signaling during and after call setup. In this manner, the need to query the caller for this information is eliminated.

REFERENCES:
patent: 4460806 (1984-07-01), Canniff et al.
patent: 4577066 (1986-03-01), Bimonte et al.
patent: 4611096 (1986-09-01), Asmuth et al.
patent: 4827500 (1989-05-01), Binkerd et al.
patent: 5046088 (1991-09-01), Margulies

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