GB1110367A - Switching networks - Google Patents
Switching networksInfo
- Publication number
- GB1110367A GB1110367A GB12713/66A GB1271366A GB1110367A GB 1110367 A GB1110367 A GB 1110367A GB 12713/66 A GB12713/66 A GB 12713/66A GB 1271366 A GB1271366 A GB 1271366A GB 1110367 A GB1110367 A GB 1110367A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nodes
- switches
- network
- subscribers
- connection
- 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
- H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Exchange Systems With Centralized Control (AREA)
Abstract
1,110,367. Automatic exchange systems. INTERNATIONAL BUSINESS MACHINES CORPORATION. 23 March, 1966 [2 April, 1965], No. 12713/66. Heading H4K. A switching network comprises a number of closed meshes defined by conductors arranged in a co-ordinate manner, the intersecting points or nodes being provided with switches for connecting together any pair of conductors. In a 2 co-ordinate network, Fig. 1, subscribers' lines are connected to the nodes N over switches A, and each node may be connected to any one of 4 adjacent nodes over switches X, Y, the object being to interconnect pairs of subscribers over the shortest available path with a low blocking factor in relation to the switching equipment employed. The blocking factor may be further reduced if provision is made for rearranging existing connections. Thus, for example, with the 4 existing connections shown in Fig. 3a, if a connection is required between B33 and B43 it can be obtained by changing the B32, B44 connection to that shown dotted in Fig. 3d. The average path length of a connection may be reduced by allotting a subscriber's line to more than one node. In Fig. 7 (not shown) auxiliary cross-point matrices are employed for connecting any one of 2 (or 4) lines to any one of 2 (or 4) nodes. The arrangement may be extended to more than 2 co-ordinates, and it is found that for a given number of nodes an optimum result is obtained by suitable choice of the number of co-ordinates. The switches at the nodes may be of multi-position mechanical type, cross-bars or reed relays. The switches are conveniently controlled by a central processing unit CPU, Fig. 13, which obtains the addresses of the calling and called subscribers from a line scanner 102 and sends signals indicative of the shortest available path to a switch controller 105. If the CPU fails the memory of the network may be recaptured by the use of a network scanner 106.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7571A FR1526799A (en) | 1965-04-02 | 1965-04-02 | Switching network |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1110367A true GB1110367A (en) | 1968-04-18 |
Family
ID=8572468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12713/66A Expired GB1110367A (en) | 1965-04-02 | 1966-03-23 | Switching networks |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS439781B1 (en) |
DE (1) | DE1487623C3 (en) |
FR (1) | FR1526799A (en) |
GB (1) | GB1110367A (en) |
NL (1) | NL152425B (en) |
SE (1) | SE347631B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0005503A1 (en) * | 1978-05-12 | 1979-11-28 | Western Electric Company, Incorporated | Nodal switching network with binary order links |
EP0006816A1 (en) * | 1978-06-29 | 1980-01-09 | Christian Duret | Nodal structure switching network |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3064107D1 (en) * | 1979-06-12 | 1983-08-18 | Thomson Csf Mat Tel | Switching network and telecommunication centre comprising such a network |
FR2460083A1 (en) * | 1979-06-25 | 1981-01-16 | Materiel Telephonique | Switching network for telephone exchange - connects large number of telephone switching centres to each other via matrix of connection wires |
FR2458970A1 (en) * | 1979-06-12 | 1981-01-02 | Materiel Telephonique | SWITCHING NETWORK WITH DISTRIBUTED STRUCTURE FOR TELECOMMUNICATIONS CENTER |
FR2480550A1 (en) * | 1980-04-15 | 1981-10-16 | Thomson Csf Mat Tel | Telephone exchange digital switching network - has operators distributed over generatrices and having respective rank and file coordinate with interconnections by set number of links |
-
1965
- 1965-04-02 FR FR7571A patent/FR1526799A/en not_active Expired
-
1966
- 1966-03-23 GB GB12713/66A patent/GB1110367A/en not_active Expired
- 1966-03-24 DE DE1487623A patent/DE1487623C3/en not_active Expired
- 1966-03-31 NL NL666604320A patent/NL152425B/en not_active IP Right Cessation
- 1966-04-01 SE SE04375/66A patent/SE347631B/xx unknown
- 1966-04-02 JP JP2029566A patent/JPS439781B1/ja active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0005503A1 (en) * | 1978-05-12 | 1979-11-28 | Western Electric Company, Incorporated | Nodal switching network with binary order links |
EP0006816A1 (en) * | 1978-06-29 | 1980-01-09 | Christian Duret | Nodal structure switching network |
Also Published As
Publication number | Publication date |
---|---|
NL6604320A (en) | 1966-10-03 |
DE1487623A1 (en) | 1969-01-16 |
NL152425B (en) | 1977-02-15 |
SE347631B (en) | 1972-08-07 |
JPS439781B1 (en) | 1968-04-22 |
DE1487623C3 (en) | 1979-06-28 |
FR1526799A (en) | 1968-05-31 |
DE1487623B2 (en) | 1970-08-13 |
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