Title:
DIAL-IN PROCESSING CIRCUIT
Document Type and Number:
Japanese Patent JP2600561
Kind Code:
B2
Abstract:
PURPOSE: To attain the changeover to the dial-in mode without causing any hindrance to communication.
CONSTITUTION: A dial-in switch 27 is provided to the processing circuit to allow the processing circuit to set the dial-in mode. When a call signal from a telephone exchange is received twice while the dial-in switch 27 is operated and the dial-in mode is in the set enable state, a CPU 4 connects a telephone line L. When a push signal detection circuit 24 detects a push tone signal from the telephone exchange, the CPU 4 discriminates it that the changeover to the dial-in line is implemented by the telephone exchange side, the processing circuit is set to the dial-in mode and a prescribed dial-in processing is continued, Furthermore, when no push tone signal is detected, the CPU 4 discriminates it that the changeover to the dial-in line is not yew executed by the telephone exchange side and the communication is implemented in the general line mode.
Inventors:
Hiroyasu Yoshikawa
Application Number:
JP30419692A
Publication Date:
April 16, 1997
Filing Date:
November 13, 1992
Export Citation:
Assignee:
Murata Machinery Co., Ltd.
International Classes:
H04M3/00; H04Q3/58; (IPC1-7): H04Q3/58; H04M3/00
Domestic Patent References:
| JP6367096A | ||||
| JP5462711A |
Attorney, Agent or Firm:
Hironobu Onda