Title:
HOME TELEPHONE SET WITH TELEVISION MONITOR
Document Type and Number:
Japanese Patent JP2978616
Kind Code:
B2
Abstract:
PURPOSE: To simplify the design condition relating to the voice system and the video image system by sending/receiving a voice signal generated by an entry hall slave set with a TV camera to/-from a telephone set terminal connecting to an extension side transmission line of a home telephone master set together with a voice signal of a trunk line and a doorphone slave set.
CONSTITUTION: When a call button 14 built in an entry hall slave set with a TV camera EQ1 is depressed, a video signal is inputted to an interface 2 for the slave set EQ1 built in a home telephone master set 1, a spectrum subject to FM modulation by a video carrier is employed via a video/voice multiplexer circuit 5 and sent to a CRT 23 comprising TV monitors MQ1, MQ2. The voice signal of a trunk line and the slave set EQ1 is inputted to the circuit 5 via a voice circuit 6, and received between telephone set terminals TE1, TE2. Thus, the wiring work is standardized and a work of adding a video image to a home telephone set in operation is not required.
Inventors:
TANAKA MITSUTOSHI
Application Number:
JP31614991A
Publication Date:
November 15, 1999
Filing Date:
November 29, 1991
Export Citation:
Assignee:
AIPPON KK
International Classes:
H04N5/44; H04N7/18; (IPC1-7): H04N7/18
Domestic Patent References:
| JP3172059A | ||||
| JP63292891A |
Attorney, Agent or Firm:
Moriya Kazuo (1 person outside)
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