Telephone systems

Details Telephone systems Telephone systems

1984-05-24

1986-07-15

Dwyer, James L.

179 611, 179 81R, H04M 1110

Patent

active

046008098

ABSTRACT:
In a telephone system having an automatic response function wherein a predetermined answer message is automatically sent to a calling originator when a speaking path to the calling originator is established in response to a call signal originated by calling from the calling originator, there are provided a DTMF signal decoder for decoding a DTMF signal sent from the calling originator as a result of key operation at the calling originator after the speaking path has been established, and a memory for storing operated key data corresponding to the output of the DTMF signal decoder, whereby information regarding the calling originator is obtained when the stored content of the memory is zero.

REFERENCES:
patent: 4304968 (1981-12-01), Klausner et al.
patent: 4399331 (1983-08-01), Brown et al.

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