Title:
【発明の名称】相手応答検知装置
Document Type and Number:
Japanese Patent JP2567289
Kind Code:
B2
Abstract:
A called party response detecting apparatus of a terminal equipment includes a plurality of filter units, a determining unit, and an analyzing unit. The filter units are commonly connected to an input side and detects specific frequency components included in a plurality of signal tones coming from a telephone line. The determining unit checks the presence/absence of each output from the filter units for each fundamental period to determine a signal type on the basis of a predetermined output pattern. The analyzing unit analyzes various signal tones and a called party response on the basis of occurrences of signal type outputs during a predetermined time period of the determining unit.
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Inventors:
SANO YOSHIKI
Application Number:
JP3841390A
Publication Date:
December 25, 1996
Filing Date:
February 21, 1990
Export Citation:
Assignee:
TAMURA ELECTRIC WORKS LTD
International Classes:
H04M1/00; H04M11/00; H04M17/00; H04Q1/45; H04Q1/50; (IPC1-7): H04M17/00; H04M1/00; H04Q1/45
Attorney, Agent or Firm:
Masaki Yamakawa (3 outside)