CA1004788A - Plant telephone communication system - Google Patents

Plant telephone communication system

Info

Publication number
CA1004788A
CA1004788A CA186,161A CA186161A CA1004788A CA 1004788 A CA1004788 A CA 1004788A CA 186161 A CA186161 A CA 186161A CA 1004788 A CA1004788 A CA 1004788A
Authority
CA
Canada
Prior art keywords
communication system
telephone communication
plant telephone
plant
telephone
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
CA186,161A
Other versions
CA186161S (en
Inventor
Paul B. Day
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.)
Gai Tronics Corp
Original Assignee
Gai Tronics 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 Gai Tronics Corp filed Critical Gai Tronics Corp
Priority to CA186,161A priority Critical patent/CA1004788A/en
Application granted granted Critical
Publication of CA1004788A publication Critical patent/CA1004788A/en
Expired legal-status Critical Current

Links

CA186,161A 1973-11-19 1973-11-19 Plant telephone communication system Expired CA1004788A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA186,161A CA1004788A (en) 1973-11-19 1973-11-19 Plant telephone communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA186,161A CA1004788A (en) 1973-11-19 1973-11-19 Plant telephone communication system

Publications (1)

Publication Number Publication Date
CA1004788A true CA1004788A (en) 1977-02-01

Family

ID=4098435

Family Applications (1)

Application Number Title Priority Date Filing Date
CA186,161A Expired CA1004788A (en) 1973-11-19 1973-11-19 Plant telephone communication system

Country Status (1)

Country Link
CA (1) CA1004788A (en)

Similar Documents

Publication Publication Date Title
CA1026827A (en) Radio telephone system
CA1035014A (en) Emergency communication system
CA973984A (en) Telephone looptest system
CA1020200A (en) Sprinkling system
CA1032259A (en) Communication switching system
CA997181A (en) Optical communication system
CA1007989A (en) Sound communication system
CA1013080A (en) Communication system interface circuits
GB1439107A (en) Telephone systems
AU500103B2 (en) Communication system
CA989484A (en) Single channel communication system
CA997462A (en) Facsimile communication system
CA970086A (en) Interconnector for telephone units
CA1032256A (en) Telephone exchange metering system
CA996287A (en) Hospital communication system
CA1004788A (en) Plant telephone communication system
CA1035476A (en) Telephone subscriber distribution system
CA1006825A (en) Sound communication system
CA996286A (en) Telephone control system
IL45879A0 (en) Telecommunication system
CA1008547A (en) Telephone system trouble analyzer
CA1006279A (en) Relay range extender for telephone systems
CA1000427A (en) Telephone dialling system
AU483535B2 (en) Telephone dialling system
AU481420B2 (en) Communication switching system