GB713703A - Identification of line circuits of an automatic switching system by line identification potential marking - Google Patents
Identification of line circuits of an automatic switching system by line identification potential markingInfo
- Publication number
- GB713703A GB713703A GB11703/52A GB1170352A GB713703A GB 713703 A GB713703 A GB 713703A GB 11703/52 A GB11703/52 A GB 11703/52A GB 1170352 A GB1170352 A GB 1170352A GB 713703 A GB713703 A GB 713703A
- Authority
- GB
- United Kingdom
- Prior art keywords
- identification
- potential
- outlets
- outlet
- volts
- 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
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
713,703. Automatic exchange systems. STAATSBEDRIJF DER POSTERIJEN TELEGRAFIE EN TELEFONIE. May 8, 1952 [May 19, 1951], No. 11703/52. Class 40 (4) Corresponding test outlets of line finders OZ and final selectors EK are interconnected by a star or equivalent delta network of resistors R1 R2, R3, which are connected to a common potential VI of -60 volts and are so chosen that individual line finder and final selector outlets exhibit characteristic identification potentials in the ranges -32 to -60 volts and -28 to 0 volts respectively when the outlets are tested. The identity of line finder outlets is determined by a register (not shown) which tests the potential over a resistor R5 and busies the calling outlet by closing contact b. The corresponding final selector outlet then exhibits the correct identification potential between -28 to 0 volts instead of V1, and indicate a busy condition as well as permitting identification of the outlet by a register. Free final selectors initially have a potential V1, and the correct identification potential does not appear until a resistor R4 is connected in series by the register. A resistor of the same value. as R4 is connected to the outlet for the duration of the call to maintain a busy condition. Specification 647,073 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL309356X | 1951-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB713703A true GB713703A (en) | 1954-08-18 |
Family
ID=19783578
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11703/52A Expired GB713703A (en) | 1951-05-19 | 1952-05-08 | Identification of line circuits of an automatic switching system by line identification potential marking |
GB11852/52A Expired GB750130A (en) | 1951-05-19 | 1952-05-09 | Trunking diagram for an automatic signalling system |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11852/52A Expired GB750130A (en) | 1951-05-19 | 1952-05-09 | Trunking diagram for an automatic signalling system |
Country Status (6)
Country | Link |
---|---|
BE (2) | BE511424A (en) |
CH (2) | CH309356A (en) |
DE (2) | DE919480C (en) |
FR (2) | FR1059993A (en) |
GB (2) | GB713703A (en) |
NL (3) | NL161342B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE969954C (en) * | 1954-10-28 | 1958-08-07 | Allg Telefon Fabrik G M B H | Circuit arrangement for telecommunications systems with call seekers |
DE1029044B (en) * | 1955-09-14 | 1958-04-30 | Siemens Ag | Relayless subscriber circuit for telephone systems |
CN110716467B (en) * | 2019-10-16 | 2021-03-30 | 南京南瑞继保电气有限公司 | Communication method and control system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE322105C (en) * | 1912-09-27 | 1920-06-22 | Western Electric Co Ltd | Circuit arrangement for telephone systems, in which calling lines are connected to connecting circuits by means of automatic switching mechanisms |
DE696328C (en) * | 1937-03-10 | 1940-09-19 | Normalzeit G M B H | Circuit arrangement for telecommunication systems with dialer operation for the automatic notification of a subscriber who is prevented from establishing a connection when the connection path becomes free |
-
0
- NL NL81336D patent/NL81336C/xx active
- NL NL6814706.A patent/NL161343B/en unknown
- BE BE510822D patent/BE510822A/xx unknown
- NL NL7404267.A patent/NL161342B/en unknown
- BE BE511424D patent/BE511424A/xx unknown
-
1952
- 1952-04-23 CH CH309356D patent/CH309356A/en unknown
- 1952-04-23 DE DEST4743A patent/DE919480C/en not_active Expired
- 1952-04-25 FR FR1059993D patent/FR1059993A/en not_active Expired
- 1952-05-08 GB GB11703/52A patent/GB713703A/en not_active Expired
- 1952-05-09 GB GB11852/52A patent/GB750130A/en not_active Expired
- 1952-05-14 CH CH316037D patent/CH316037A/en unknown
- 1952-05-18 DE DEST4858A patent/DE940359C/en not_active Expired
- 1952-05-19 FR FR1065475D patent/FR1065475A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH316037A (en) | 1956-09-15 |
NL81336C (en) | |
GB750130A (en) | 1956-06-13 |
DE940359C (en) | 1956-03-15 |
BE511424A (en) | |
NL161343B (en) | |
BE510822A (en) | |
FR1059993A (en) | 1954-03-30 |
DE919480C (en) | 1954-10-25 |
CH309356A (en) | 1955-08-31 |
NL161342B (en) | |
FR1065475A (en) | 1954-05-26 |
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