GB1179507A - Improvements in or relating to Automatic Telecommunication Exchanges - Google Patents

Improvements in or relating to Automatic Telecommunication Exchanges

Info

Publication number
GB1179507A
GB1179507A GB4847067A GB4847067A GB1179507A GB 1179507 A GB1179507 A GB 1179507A GB 4847067 A GB4847067 A GB 4847067A GB 4847067 A GB4847067 A GB 4847067A GB 1179507 A GB1179507 A GB 1179507A
Authority
GB
United Kingdom
Prior art keywords
switches
switch
inlets
primary
bar
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
GB4847067A
Inventor
Evert Oskar Ekbergh
Per Gustaf Jonsson
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to GB2441069A priority Critical patent/GB1179508A/en
Priority to GB4847067A priority patent/GB1179507A/en
Priority to NO414968A priority patent/NO135389C/en
Priority to CH1568568A priority patent/CH513561A/en
Priority to ES359453A priority patent/ES359453A1/en
Priority to DE19681804625 priority patent/DE1804625B2/en
Priority to BE722867D priority patent/BE722867A/xx
Priority to FR1589960D priority patent/FR1589960A/fr
Publication of GB1179507A publication Critical patent/GB1179507A/en
Expired legal-status Critical Current

Links

Classifications

    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)

Abstract

1,179,507. Automatic exchange systems. INTERNATIONAL STANDARD ELECTRIC CORP. 25 Oct., 1967, No. 48470/67. Heading H4K. In an exchange system which uses a cross-bar switching network of the type having primary and secondary cross-bar switches in each stage, provision for overflow working is made by connecting certain inlets of each primary switch to certain inlets of some of the other primary switches. The switches are preferably 8 x 16 cross-bar switches of the type described in Specification 1,124,932, each primary switch unit A1-A8 consisting of two such switches having their horizontal bars strapped so as to form in effect a 16 x 16 switch and also having their horizontal bar magnets connected together for simultaneous operation. The switches are held mechanically. There is full availability between the inlets and outlets of each stage. Overflow working is provided by connecting the 7th and 8th (and 15th and 16th) verticals of each A switch to corresponding verticals in some of the other A switches as opposed to the conventional practice of connecting some outlets from an A switch to some inlets of other A switches. In an embodiment (Fig. 3, not shown) the overflow links are used for connecting a register to an outgoing trunk prior to outpulsing. When sending is completed the original calling line/register and register/trunk paths are dropped and a direct connection between the calling line and the trunk is made. However, if the network is congested and a direct path cannot be found, the call is completed over the original paths, the registers being provided with feedbridges to meet this eventuality. This latter feature forms the basis of Specification 1,179,508.
GB4847067A 1967-10-25 1967-10-25 Improvements in or relating to Automatic Telecommunication Exchanges Expired GB1179507A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB2441069A GB1179508A (en) 1967-10-25 1967-10-25 Improvements in or relating to Telephone Exchanges
GB4847067A GB1179507A (en) 1967-10-25 1967-10-25 Improvements in or relating to Automatic Telecommunication Exchanges
NO414968A NO135389C (en) 1967-10-25 1968-10-19 TELECOMMUNICATIONS AND SPECIAL TELEPHONE CENTER WITH A TWO-STEP CONNECTION FIELD.
CH1568568A CH513561A (en) 1967-10-25 1968-10-21 Automatic telecommunications office
ES359453A ES359453A1 (en) 1967-10-25 1968-10-23 Automatic telecommunication central. (Machine-translation by Google Translate, not legally binding)
DE19681804625 DE1804625B2 (en) 1967-10-25 1968-10-23 Telecommunication, in particular telephone switching system, with a two-stage coupling network of crossbar switches
BE722867D BE722867A (en) 1967-10-25 1968-10-25
FR1589960D FR1589960A (en) 1967-10-25 1968-10-25

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2441069A GB1179508A (en) 1967-10-25 1967-10-25 Improvements in or relating to Telephone Exchanges
GB4847067A GB1179507A (en) 1967-10-25 1967-10-25 Improvements in or relating to Automatic Telecommunication Exchanges

Publications (1)

Publication Number Publication Date
GB1179507A true GB1179507A (en) 1970-01-28

Family

ID=26257099

Family Applications (2)

Application Number Title Priority Date Filing Date
GB4847067A Expired GB1179507A (en) 1967-10-25 1967-10-25 Improvements in or relating to Automatic Telecommunication Exchanges
GB2441069A Expired GB1179508A (en) 1967-10-25 1967-10-25 Improvements in or relating to Telephone Exchanges

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2441069A Expired GB1179508A (en) 1967-10-25 1967-10-25 Improvements in or relating to Telephone Exchanges

Country Status (5)

Country Link
BE (1) BE722867A (en)
CH (1) CH513561A (en)
DE (1) DE1804625B2 (en)
FR (1) FR1589960A (en)
GB (2) GB1179507A (en)

Also Published As

Publication number Publication date
DE1804625B2 (en) 1973-09-27
FR1589960A (en) 1970-04-06
DE1804625A1 (en) 1969-07-03
BE722867A (en) 1969-04-25
CH513561A (en) 1971-09-30
GB1179508A (en) 1970-01-28

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