GB439970A - Improvements in or relating to combined telegraph and telephone exchange systems - Google Patents

Improvements in or relating to combined telegraph and telephone exchange systems

Info

Publication number
GB439970A
GB439970A GB1804834A GB1804834A GB439970A GB 439970 A GB439970 A GB 439970A GB 1804834 A GB1804834 A GB 1804834A GB 1804834 A GB1804834 A GB 1804834A GB 439970 A GB439970 A GB 439970A
Authority
GB
United Kingdom
Prior art keywords
teleprinter
connection
relay
sub
line
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
GB1804834A
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
Priority to BE408646D priority Critical patent/BE408646A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1804834A priority patent/GB439970A/en
Priority to FR789413D priority patent/FR789413A/fr
Publication of GB439970A publication Critical patent/GB439970A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
GB1804834A 1934-06-18 1934-06-18 Improvements in or relating to combined telegraph and telephone exchange systems Expired GB439970A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE408646D BE408646A (enrdf_load_stackoverflow) 1934-06-18
GB1804834A GB439970A (en) 1934-06-18 1934-06-18 Improvements in or relating to combined telegraph and telephone exchange systems
FR789413D FR789413A (fr) 1934-06-18 1935-04-30 Perfectionnements pour systèmes de connexion télégraphiques ou télégraphiques et téléphoniques combinés

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1804834A GB439970A (en) 1934-06-18 1934-06-18 Improvements in or relating to combined telegraph and telephone exchange systems

Publications (1)

Publication Number Publication Date
GB439970A true GB439970A (en) 1935-12-18

Family

ID=10105733

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1804834A Expired GB439970A (en) 1934-06-18 1934-06-18 Improvements in or relating to combined telegraph and telephone exchange systems

Country Status (3)

Country Link
BE (1) BE408646A (enrdf_load_stackoverflow)
FR (1) FR789413A (enrdf_load_stackoverflow)
GB (1) GB439970A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR789413A (fr) 1935-10-29
BE408646A (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
US3076056A (en) Telegraph signal arrangement for a telephone system
US2721897A (en) Carrier wave communication system
US2820103A (en) Subscriber line concentrating system
GB439970A (en) Improvements in or relating to combined telegraph and telephone exchange systems
US1632012A (en) Program-selecting circuits
US2200820A (en) Automatic telephone system
GB1326955A (en) Telephone systems
US2247507A (en) Telephone system
US2278752A (en) Busy signal for automatic telephone systems
US2081434A (en) Combination telephone and telegraph exchange system
US2024581A (en) Telegraph toll system
US2339669A (en) Communication system
US2300044A (en) Telephone subscriber's station
US2060250A (en) Combined teleprinter and telephone system
US2227121A (en) Printing telegraph system
US2306701A (en) Combined telephone and telegraph cord and attendants' circuits
US2254723A (en) Subscriber line circuit
US1617414A (en) Signaling system
US2897285A (en) Intercommunicating system
US2225648A (en) Printing telegraph system
US2866854A (en) Tone applier circuit
US1868326A (en) Telephone system
US1882753A (en) Telephone system
US2590945A (en) Trunk circuit
US1866260A (en) Telephone system