CA507730A - Toll switching telephone systems - Google Patents

Toll switching telephone systems

Info

Publication number
CA507730A
CA507730A CA507730A CA507730DA CA507730A CA 507730 A CA507730 A CA 507730A CA 507730 A CA507730 A CA 507730A CA 507730D A CA507730D A CA 507730DA CA 507730 A CA507730 A CA 507730A
Authority
CA
Canada
Prior art keywords
telephone systems
switching telephone
toll switching
toll
systems
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
CA507730A
Other languages
French (fr)
Inventor
W. Balzer Harvey
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 Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
Publication date
Application granted granted Critical
Publication of CA507730A publication Critical patent/CA507730A/en
Expired legal-status Critical Current

Links

CA507730A Toll switching telephone systems Expired CA507730A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA507730T

Publications (1)

Publication Number Publication Date
CA507730A true CA507730A (en) 1954-11-30

Family

ID=35653675

Family Applications (1)

Application Number Title Priority Date Filing Date
CA507730A Expired CA507730A (en) Toll switching telephone systems

Country Status (1)

Country Link
CA (1) CA507730A (en)

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