CA318921A - Toll switching telephone system - Google Patents

Toll switching telephone system

Info

Publication number
CA318921A
CA318921A CA318921A CA318921DA CA318921A CA 318921 A CA318921 A CA 318921A CA 318921 A CA318921 A CA 318921A CA 318921D A CA318921D A CA 318921DA CA 318921 A CA318921 A CA 318921A
Authority
CA
Canada
Prior art keywords
telephone system
switching telephone
toll switching
toll
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
CA318921A
Other languages
French (fr)
Inventor
Emerson Hersey Ralph
Wesley Carpenter Warren
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Publication date
Application granted granted Critical
Publication of CA318921A publication Critical patent/CA318921A/en
Expired legal-status Critical Current

Links

CA318921A Toll switching telephone system Expired CA318921A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA318921T

Publications (1)

Publication Number Publication Date
CA318921A true CA318921A (en) 1932-01-12

Family

ID=35279476

Family Applications (1)

Application Number Title Priority Date Filing Date
CA318921A Expired CA318921A (en) Toll switching telephone system

Country Status (1)

Country Link
CA (1) CA318921A (en)

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