FR617640A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR617640A
FR617640A FR617640DA FR617640A FR 617640 A FR617640 A FR 617640A FR 617640D A FR617640D A FR 617640DA FR 617640 A FR617640 A FR 617640A
Authority
FR
France
Prior art keywords
telephone systems
telephone
systems
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
French (fr)
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.)
AMERICAN TELECHRONOMETER COMPA
Original Assignee
AMERICAN TELECHRONOMETER COMPA
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 AMERICAN TELECHRONOMETER COMPA filed Critical AMERICAN TELECHRONOMETER COMPA
Application granted granted Critical
Publication of FR617640A publication Critical patent/FR617640A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/10—Metering calls from calling party, i.e. A-party charged for the communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Meter Arrangements (AREA)
FR617640D 1926-06-10 1926-06-17 Improvements to telephone systems Expired FR617640A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1469726A GB277115A (en) 1926-06-10 1926-06-10 Improvements in and relating to telephone systems

Publications (1)

Publication Number Publication Date
FR617640A true FR617640A (en) 1927-02-23

Family

ID=10045944

Family Applications (1)

Application Number Title Priority Date Filing Date
FR617640D Expired FR617640A (en) 1926-06-10 1926-06-17 Improvements to telephone systems

Country Status (2)

Country Link
FR (1) FR617640A (en)
GB (1) GB277115A (en)

Also Published As

Publication number Publication date
GB277115A (en) 1927-09-12

Similar Documents

Publication Publication Date Title
FR623645A (en) Improvements to telephone systems
FR631166A (en) Improvements to telephone systems
FR630110A (en) Improvements to telephone systems
FR629974A (en) Improvements to telephone systems
FR637230A (en) Improvements to telephone systems
FR664216A (en) Improvements to telephone systems
FR625597A (en) Improvements to telephone systems
FR629755A (en) Improvements to telephone systems
FR621655A (en) Improvements to telephone systems
FR634383A (en) Improvements to telephone systems
FR635618A (en) Improvements to telephone systems
FR636798A (en) Improvements to telephone systems
FR617640A (en) Improvements to telephone systems
FR641494A (en) Improvements to telephone systems
FR644546A (en) Improvements to telephone systems
FR622764A (en) Improvements to telephone systems
FR618825A (en) Improvements to telephone systems
FR618492A (en) Improvements to telephone systems
FR617641A (en) Improvements to telephone systems
FR647751A (en) Improvements to telephone systems
FR650954A (en) Improvements to telephone systems
FR621050A (en) Improvements to telephone systems
FR622358A (en) Improvements to telephone systems
FR620367A (en) Improvements relating to telephone systems
FR631458A (en) Improvements to telephone or similar systems