GB740876A - Improvements in or relating to automatic telephone exchanges - Google Patents
Improvements in or relating to automatic telephone exchangesInfo
- Publication number
- GB740876A GB740876A GB23746/53A GB2374653A GB740876A GB 740876 A GB740876 A GB 740876A GB 23746/53 A GB23746/53 A GB 23746/53A GB 2374653 A GB2374653 A GB 2374653A GB 740876 A GB740876 A GB 740876A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- group
- relays
- circuit
- selecting
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/08—Indicating faults in circuits or apparatus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE740876X | 1952-08-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB740876A true GB740876A (en) | 1955-11-23 |
Family
ID=20321606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23746/53A Expired GB740876A (en) | 1952-08-29 | 1953-08-27 | Improvements in or relating to automatic telephone exchanges |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE522411A (US07714131-20100511-C00038.png) |
FR (1) | FR1086971A (US07714131-20100511-C00038.png) |
GB (1) | GB740876A (US07714131-20100511-C00038.png) |
NL (2) | NL87902C (US07714131-20100511-C00038.png) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1210050B (de) * | 1963-08-08 | 1966-02-03 | Telefonbau | Schaltungsanordnung zur Kontrolle der Durchschaltung ein- oder mehrstufiger Koppelfelder in Fernmeldevermittlungsanlagen, insbesondere Fernsprechwaehlanlagen |
-
0
- NL NLAANVRAGE7413733,A patent/NL180972B/xx unknown
- NL NL87902D patent/NL87902C/xx active
- BE BE522411D patent/BE522411A/xx unknown
-
1953
- 1953-08-27 GB GB23746/53A patent/GB740876A/en not_active Expired
- 1953-08-29 FR FR1086971D patent/FR1086971A/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1210050B (de) * | 1963-08-08 | 1966-02-03 | Telefonbau | Schaltungsanordnung zur Kontrolle der Durchschaltung ein- oder mehrstufiger Koppelfelder in Fernmeldevermittlungsanlagen, insbesondere Fernsprechwaehlanlagen |
Also Published As
Publication number | Publication date |
---|---|
FR1086971A (fr) | 1955-02-17 |
NL180972B (nl) | |
BE522411A (US07714131-20100511-C00038.png) | |
NL87902C (US07714131-20100511-C00038.png) |
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