AU144134B2 - Improvements in or relating to voice-frequency signalling systems - Google Patents

Improvements in or relating to voice-frequency signalling systems

Info

Publication number
AU144134B2
AU144134B2 AU21695/48A AU2169548A AU144134B2 AU 144134 B2 AU144134 B2 AU 144134B2 AU 21695/48 A AU21695/48 A AU 21695/48A AU 2169548 A AU2169548 A AU 2169548A AU 144134 B2 AU144134 B2 AU 144134B2
Authority
AU
Australia
Prior art keywords
voice
relating
signalling systems
frequency signalling
frequency
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
AU21695/48A
Other versions
AU2169548A (en
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.)
Nokia Services Ltd
Original Assignee
Standard Telephone and Cables Pty Ltd
Filing date
Publication date
Application filed by Standard Telephone and Cables Pty Ltd filed Critical Standard Telephone and Cables Pty Ltd
Application granted granted Critical
Publication of AU144134B2 publication Critical patent/AU144134B2/en
Publication of AU2169548A publication Critical patent/AU2169548A/en
Expired legal-status Critical Current

Links

AU21695/48A 1948-07-08 Improvements in or relating to voice-frequency signalling systems Expired AU144134B2 (en)

Publications (2)

Publication Number Publication Date
AU144134B2 true AU144134B2 (en) 1948-08-05
AU2169548A AU2169548A (en) 1948-08-05

Family

ID=

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