GB631414A - Improvements in or relating to telephone transmission systems - Google Patents

Improvements in or relating to telephone transmission systems

Info

Publication number
GB631414A
GB631414A GB18479/47A GB1847947A GB631414A GB 631414 A GB631414 A GB 631414A GB 18479/47 A GB18479/47 A GB 18479/47A GB 1847947 A GB1847947 A GB 1847947A GB 631414 A GB631414 A GB 631414A
Authority
GB
United Kingdom
Prior art keywords
relay
speech
relays
station
stations
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
GB18479/47A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB631414A publication Critical patent/GB631414A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/17—Time-division multiplex systems in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/06—Secret communication by transmitting the information or elements thereof at unnatural speeds or in jumbled order or backwards

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
GB18479/47A 1941-05-13 1947-07-11 Improvements in or relating to telephone transmission systems Expired GB631414A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US631414XA 1941-05-13 1941-05-13

Publications (1)

Publication Number Publication Date
GB631414A true GB631414A (en) 1949-11-02

Family

ID=22047191

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18479/47A Expired GB631414A (en) 1941-05-13 1947-07-11 Improvements in or relating to telephone transmission systems

Country Status (2)

Country Link
GB (1) GB631414A (xx)
NL (1) NL70309C (xx)

Also Published As

Publication number Publication date
NL70309C (xx)

Similar Documents

Publication Publication Date Title
US3173996A (en) Multiple channel radio telephone system
US2411091A (en) Selective signal receiving circuit
GB631414A (en) Improvements in or relating to telephone transmission systems
US2301223A (en) Transmission system
US3227806A (en) Communication system for telephone and teleprinter service
US2200559A (en) Transmission sysotfi
US1632012A (en) Program-selecting circuits
US2043674A (en) Calling device
US2084903A (en) Signal system
US3100244A (en) Inter-communication systems
US2410866A (en) Telephone system
US1295096A (en) Telephone system.
US2653998A (en) Remote-control system
US2276518A (en) Telephone system
US1798284A (en) Telephone system
US2748193A (en) Duplex signaling system
US1927989A (en) System for replacement of alpha defective circuit
US2228375A (en) Telephone metering system
US2576216A (en) Selective calling system
US1469809A (en) Automatic telephone system
US2966551A (en) Public announcing system
US1348209A (en) Telephone-exchange system
US1296104A (en) Semi-automatic telephone system.
US2282900A (en) Telephone system
US1251604A (en) Ringing control system for telephone-exchanges.