DK81237C - Device for diverting ringing signals by telephone sets. - Google Patents

Device for diverting ringing signals by telephone sets.

Info

Publication number
DK81237C
DK81237C DK147253AA DK147253A DK81237C DK 81237 C DK81237 C DK 81237C DK 147253A A DK147253A A DK 147253AA DK 147253 A DK147253 A DK 147253A DK 81237 C DK81237 C DK 81237C
Authority
DK
Denmark
Prior art keywords
diverting
telephone sets
ringing signals
ringing
signals
Prior art date
Application number
DK147253AA
Other languages
Danish (da)
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Application granted granted Critical
Publication of DK81237C publication Critical patent/DK81237C/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/71—Substation extension arrangements
    • H04M1/715—Substation extension arrangements using two or more extensions per line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/006—Call diverting means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Devices For Supply Of Signal Current (AREA)
DK147253AA 1952-05-05 1953-05-02 Device for diverting ringing signals by telephone sets. DK81237C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE725030X 1952-05-05

Publications (1)

Publication Number Publication Date
DK81237C true DK81237C (en) 1956-07-02

Family

ID=20316086

Family Applications (1)

Application Number Title Priority Date Filing Date
DK147253AA DK81237C (en) 1952-05-05 1953-05-02 Device for diverting ringing signals by telephone sets.

Country Status (4)

Country Link
US (1) US2718560A (en)
DE (1) DE916179C (en)
DK (1) DK81237C (en)
GB (1) GB725030A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2892038A (en) * 1957-05-07 1959-06-23 Gen Dynamics Corp Line adapter circuit for special telephone service
US3041405A (en) * 1958-12-08 1962-06-26 Automatic Elect Lab Line circuit with two-way transfer
NL286252A (en) * 1961-12-12

Also Published As

Publication number Publication date
GB725030A (en) 1955-03-02
US2718560A (en) 1955-09-20
DE916179C (en) 1954-08-05

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