CA503174A - Circuits de sous-centrales pour systemes telephoniques - Google Patents

Circuits de sous-centrales pour systemes telephoniques

Info

Publication number: CA503174A
Authority: CA; Canada
Prior art keywords: telephone systems; substation circuits; substation; circuits; telephone
Prior art date: 1954-05-25
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

CA503174A

Other languages

Inventor

C. Pye Harold

Original Assignee

Northern Electric Co Ltd

Publication date

1954-05-25

1954-05-25 Application granted granted Critical

1954-05-25 Publication of CA503174A publication Critical patent/CA503174A/fr

Status Expired legal-status Critical Current

CA503174A Circuits de sous-centrales pour systemes telephoniques Expired CA503174A (fr)

Application Number	Priority Date	Filing Date	Title
CA503174T

Publication Number	Publication Date
CA503174A true CA503174A (fr)	1954-05-25

Application Number	Title	Priority Date	Filing Date
CA503174A Expired CA503174A (fr)			Circuits de sous-centrales pour systemes telephoniques

Country	Link
CA (1)	CA503174A (fr)

Publication	Publication Date	Title
CA503174A (fr)	1954-05-25	Circuits de sous-centrales pour systemes telephoniques
CA507055A (fr)	1954-11-02	Systeme de commutation electronique de telephone
CA501232A (fr)	1954-04-06	Appareil de manoeuvre pour systemes de telephone
CA502241A (fr)	1954-05-11	Appareil de manoeuvre pour systemes telephoniques
CA499356A (fr)	1954-01-19	Systemes telephoniques
CA501321A (fr)	1954-04-06	Systemes telephoniques
CA502236A (fr)	1954-05-11	Systemes telephoniques
CA502239A (fr)	1954-05-11	Systemes telephoniques
CA507617A (fr)	1954-11-23	Systemes telephoniques
CA502238A (fr)	1954-05-11	Systemes telephoniques
CA506411A (fr)	1954-10-12	Systemes telephoniques
CA506412A (fr)	1954-10-12	Commutateurs de raccord pour systemes telephoniques
AU166599B2 (en)	1954-04-15	Switching circuits for automatic telephone systems
CA507729A (fr)	1954-11-30	Systemes telephoniques de manoeuvre d'appels
CA507730A (fr)	1954-11-30	Systemes telephoniques de manoeuvre d'appels
CA504567A (fr)	1954-07-27	Systemes de manoeuvre electronique
CA513022A (fr)	1955-05-17	Circuits de lignes pour systemes de communication
CA508240A (fr)	1954-12-14	Circuits d'essai de canalisation pour systemes telephoniques
CA512519A (fr)	1955-05-03	Systemes de telephone a postes groupes
CA500705A (fr)	1954-03-16	Systemes telephoniques a radio
CA510190A (fr)	1955-02-15	Systemes telephoniques
CA510665A (fr)	1955-03-08	Systemes telephoniques
CA511747A (fr)	1955-04-12	Systemes telephoniques
CA512083A (fr)	1955-04-19	Systemes telephoniques
CA512309A (fr)	1955-04-26	Systemes telephoniques