AU201283B2 - Improvements in subscribers line circuits for use in automatic telephone systems - Google Patents

Improvements in subscribers line circuits for use in automatic telephone systems

Info

Publication number
AU201283B2
AU201283B2 AU6740/55A AU674055A AU201283B2 AU 201283 B2 AU201283 B2 AU 201283B2 AU 6740/55 A AU6740/55 A AU 6740/55A AU 674055 A AU674055 A AU 674055A AU 201283 B2 AU201283 B2 AU 201283B2
Authority
AU
Australia
Prior art keywords
telephone systems
automatic telephone
line circuits
subscribers line
subscribers
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
AU6740/55A
Other versions
AU674055A (en
Inventor
Devenish Allum and Ronald Threadgold Robin
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
Filing date
Publication date
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Application granted granted Critical
Publication of AU674055A publication Critical patent/AU674055A/en
Publication of AU201283B2 publication Critical patent/AU201283B2/en
Expired legal-status Critical Current

Links

AU6740/55A 1955-02-08 Improvements in subscribers line circuits for use in automatic telephone systems Expired AU201283B2 (en)

Publications (2)

Publication Number Publication Date
AU674055A AU674055A (en) 1955-08-11
AU201283B2 true AU201283B2 (en) 1955-08-11

Family

ID=

Similar Documents

Publication Publication Date Title
AU201283B2 (en) Improvements in subscribers line circuits for use in automatic telephone systems
AU674055A (en) Improvements in subscribers line circuits for use in automatic telephone systems
AU202560B2 (en) Improvements in automatic telephone systems
AU821255A (en) Improvements in automatic telephone systems
AU166599B2 (en) Switching circuits for automatic telephone systems
CA533784A (en) Subscribers line circuits in telecommunication systems
AU2498454A (en) Switching circuits for automatic telephone systems
CA513766A (en) Automatic telephone systems
CA514583A (en) Automatic telephone systems
CA516975A (en) Automatic telephone systems
CA519763A (en) Automatic telephone systems
CA512081A (en) Automatic telephone exchange systems
AU205869B2 (en) Improvements in automatic telephone exchange systems
AU204681B2 (en) Improvements in telephone systems
AU202974B2 (en) Improvements in telephone systems
AU205630B2 (en) Improvements in telephone systems
AU207899B2 (en) Improvements in telephone systems
AU208819B2 (en) Improvements in telephone systems
AU209625B2 (en) Improvements in telephone systems
AU211197B2 (en) Improvements in telephone systems
CA513022A (en) Line circuits for communication systems
CA509545A (en) Automatic telephone system
AU155538B2 (en) Improvements in automatic telephone systems
CA503174A (en) Substation circuits for telephone systems
CA512082A (en) Automatic telephone exchange system