GB1252225A - - Google Patents

Info

Publication number
GB1252225A
GB1252225A GB1252225DA GB1252225A GB 1252225 A GB1252225 A GB 1252225A GB 1252225D A GB1252225D A GB 1252225DA GB 1252225 A GB1252225 A GB 1252225A
Authority
GB
United Kingdom
Prior art keywords
response
command
call
operator
track
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
Other languages
English (en)
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 filed Critical
Publication of GB1252225A publication Critical patent/GB1252225A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/62—Keyboard equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Meter Arrangements (AREA)
GB1252225D 1969-03-12 1970-02-27 Expired GB1252225A (https=)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80661569A 1969-03-12 1969-03-12

Publications (1)

Publication Number Publication Date
GB1252225A true GB1252225A (https=) 1971-11-03

Family

ID=25194439

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1252225D Expired GB1252225A (https=) 1969-03-12 1970-02-27

Country Status (2)

Country Link
US (1) US3550288A (https=)
GB (1) GB1252225A (https=)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1312977A (en) * 1969-06-18 1973-04-11 Ricoh Kk Data processing arrangements
US3745674A (en) * 1972-02-03 1973-07-17 R Thompson Hearing tester
US4048728A (en) * 1973-09-12 1977-09-20 Systex, Inc. Training system for telephone switchboard operators using computer central processing unit
US4000518A (en) * 1975-05-12 1976-12-28 Bell Telephone Laboratories, Incorporated Signal detection during variable speed tape movements
US5942957A (en) * 1994-09-26 1999-08-24 Endgate Corporation Flip-mounted impedance

Also Published As

Publication number Publication date
US3550288A (en) 1970-12-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees