KR930003830U - 분기된 전화기에서의 통화 경보장치 - Google Patents

분기된 전화기에서의 통화 경보장치

Info

Publication number
KR930003830U
KR930003830U KR2019910010263U KR910010263U KR930003830U KR 930003830 U KR930003830 U KR 930003830U KR 2019910010263 U KR2019910010263 U KR 2019910010263U KR 910010263 U KR910010263 U KR 910010263U KR 930003830 U KR930003830 U KR 930003830U
Authority
KR
South Korea
Prior art keywords
branched
phone
alert device
call alert
call
Prior art date
Application number
KR2019910010263U
Other languages
English (en)
Other versions
KR940002281Y1 (ko
Inventor
이영재
Original Assignee
금성알프스전자 주식회사
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 금성알프스전자 주식회사 filed Critical 금성알프스전자 주식회사
Priority to KR2019910010263U priority Critical patent/KR940002281Y1/ko
Publication of KR930003830U publication Critical patent/KR930003830U/ko
Application granted granted Critical
Publication of KR940002281Y1 publication Critical patent/KR940002281Y1/ko

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/68—Circuit arrangements for preventing eavesdropping
    • H04M1/70—Lock-out or secrecy arrangements in party-line systems
    • 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
KR2019910010263U 1991-07-05 1991-07-05 분기된 전화기에서의 통화 경보장치 KR940002281Y1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019910010263U KR940002281Y1 (ko) 1991-07-05 1991-07-05 분기된 전화기에서의 통화 경보장치

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019910010263U KR940002281Y1 (ko) 1991-07-05 1991-07-05 분기된 전화기에서의 통화 경보장치

Publications (2)

Publication Number Publication Date
KR930003830U true KR930003830U (ko) 1993-02-26
KR940002281Y1 KR940002281Y1 (ko) 1994-04-13

Family

ID=19316061

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019910010263U KR940002281Y1 (ko) 1991-07-05 1991-07-05 분기된 전화기에서의 통화 경보장치

Country Status (1)

Country Link
KR (1) KR940002281Y1 (ko)

Also Published As

Publication number Publication date
KR940002281Y1 (ko) 1994-04-13

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Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
REGI Registration of establishment
LAPS Lapse due to unpaid annual fee