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FR375220A - Telephone systems with harmonic ringing tones - Google Patents

Telephone systems with harmonic ringing tones

Info

Publication number
FR375220A
FR375220A FR375220DA FR375220A FR 375220 A FR375220 A FR 375220A FR 375220D A FR375220D A FR 375220DA FR 375220 A FR375220 A FR 375220A
Authority
FR
France
Prior art keywords
telephone systems
ringing tones
harmonic ringing
harmonic
tones
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.)
Kellogg Switchboard and Supply Co
Original Assignee
Kellogg Switchboard and Supply Co
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 Kellogg Switchboard and Supply Co filed Critical Kellogg Switchboard and Supply Co
Application granted granted Critical
Publication of FR375220A publication Critical patent/FR375220A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems
    • H04Q5/08—Signalling by continuous AC

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR375220D 1907-01-21 1907-01-21 Telephone systems with harmonic ringing tones Expired FR375220A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR375220T 1907-01-21

Publications (1)

Publication Number Publication Date
FR375220A true FR375220A (en) 1907-07-03

Family

ID=1421797

Family Applications (1)

Application Number Title Priority Date Filing Date
FR375220D Expired FR375220A (en) 1907-01-21 1907-01-21 Telephone systems with harmonic ringing tones

Country Status (1)

Country Link
FR (1) FR375220A (en)

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