GB678319A - Telecommunication system comprising pbx lines - Google Patents

Telecommunication system comprising pbx lines

Info

Publication number
GB678319A
GB678319A GB2829/50A GB282950A GB678319A GB 678319 A GB678319 A GB 678319A GB 2829/50 A GB2829/50 A GB 2829/50A GB 282950 A GB282950 A GB 282950A GB 678319 A GB678319 A GB 678319A
Authority
GB
United Kingdom
Prior art keywords
pbx
relay
over
relays
selector
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
GB2829/50A
Other languages
English (en)
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB678319A publication Critical patent/GB678319A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Interface Circuits In Exchanges (AREA)
GB2829/50A 1949-02-09 1950-02-03 Telecommunication system comprising pbx lines Expired GB678319A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL678319X 1949-02-09

Publications (1)

Publication Number Publication Date
GB678319A true GB678319A (en) 1952-09-03

Family

ID=19802353

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2829/50A Expired GB678319A (en) 1949-02-09 1950-02-03 Telecommunication system comprising pbx lines

Country Status (4)

Country Link
BE (1) BE493791A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
FR (1) FR1013615A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
GB (1) GB678319A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
NL (2) NL72168C (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)

Also Published As

Publication number Publication date
FR1013615A (fr) 1952-07-31
NL144773B (nl)
BE493791A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
NL72168C (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)

Similar Documents

Publication Publication Date Title
US3178516A (en) Call forwarding arrangement
US2291481A (en) Telephone system
GB409015A (en) Improvements in or relating to telephone systems
US2932695A (en) Automatic telephone systems
US2785228A (en) Party line identification and checking circuit
US2878320A (en) Circuit arrangement for telecommunication systems, in particular telephone systems
GB678319A (en) Telecommunication system comprising pbx lines
US2376346A (en) Telecommunication system
US2410304A (en) Automatic telephone system
GB295421A (en) Improvements in telephone systems
US1568039A (en) Telephone-exchange system
US2271878A (en) Telephone system
GB636920A (en) Improvements in or relating to automatic telephone systems
GB769915A (en) Improvements in or relating to electrical connecting circuits
US1601052A (en) Telephone-exchange system
GB617932A (en) Improvements in telephone switching systems
GB704441A (en) Automatic telephone systems provided with toll recording facilities
US3088999A (en) Circuit arrangement for controlling cross-bar selectors in a telephone system
US2876286A (en) Arrangement for the identification of special service apparatus required for connections in a telecommunication system
US2714629A (en) Marking circuit
US2836659A (en) Local first selector circuit
US2458262A (en) Relay selector circuit arranged to simultaneously test a selected group of trunks
US1765619A (en) Party-line telephone system
US2416711A (en) Toll trunk selection
US2852613A (en) Register-sender arrangement