CA1251585A - Interphone system with security function - Google Patents

Interphone system with security function

Info

Publication number
CA1251585A
CA1251585A CA000510211A CA510211A CA1251585A CA 1251585 A CA1251585 A CA 1251585A CA 000510211 A CA000510211 A CA 000510211A CA 510211 A CA510211 A CA 510211A CA 1251585 A CA1251585 A CA 1251585A
Authority
CA
Canada
Prior art keywords
signal
alarm
talk unit
talk
call
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000510211A
Other languages
English (en)
French (fr)
Inventor
Norihiko Nakatsugawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Application granted granted Critical
Publication of CA1251585A publication Critical patent/CA1251585A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/0297—Robbery alarms, e.g. hold-up alarms, bag snatching alarms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Alarm Systems (AREA)
CA000510211A 1985-05-29 1986-05-28 Interphone system with security function Expired CA1251585A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP60115927A JPS61274463A (ja) 1985-05-29 1985-05-29 セキユリテイ機能付インタ−ホン装置
JPP60-115927 1985-05-29

Publications (1)

Publication Number Publication Date
CA1251585A true CA1251585A (en) 1989-03-21

Family

ID=14674634

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000510211A Expired CA1251585A (en) 1985-05-29 1986-05-28 Interphone system with security function

Country Status (4)

Country Link
JP (1) JPS61274463A (ko)
KR (1) KR900001134B1 (ko)
CA (1) CA1251585A (ko)
GB (1) GB2175773B (ko)

Also Published As

Publication number Publication date
GB8613013D0 (en) 1986-07-02
GB2175773A (en) 1986-12-03
JPS61274463A (ja) 1986-12-04
KR860009570A (ko) 1986-12-23
KR900001134B1 (ko) 1990-02-27
GB2175773B (en) 1989-07-05

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Legal Events

Date Code Title Description
MKEX Expiry