KR870015570U - Line condition detection circuit of telephone - Google Patents

Line condition detection circuit of telephone

Info

Publication number
KR870015570U
KR870015570U KR2019860003099U KR860003099U KR870015570U KR 870015570 U KR870015570 U KR 870015570U KR 2019860003099 U KR2019860003099 U KR 2019860003099U KR 860003099 U KR860003099 U KR 860003099U KR 870015570 U KR870015570 U KR 870015570U
Authority
KR
South Korea
Prior art keywords
telephone
detection circuit
condition detection
line condition
line
Prior art date
Application number
KR2019860003099U
Other languages
Korean (ko)
Other versions
KR890005718Y1 (en
Inventor
이지훈
Original Assignee
금성통신주식회사
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 금성통신주식회사 filed Critical 금성통신주식회사
Priority to KR2019860003099U priority Critical patent/KR890005718Y1/en
Publication of KR870015570U publication Critical patent/KR870015570U/en
Application granted granted Critical
Publication of KR890005718Y1 publication Critical patent/KR890005718Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/82—Line monitoring circuits for call progress or status discrimination
    • 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
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/02—Diodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/04—Transistors

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
KR2019860003099U 1986-03-14 1986-03-14 Telephone line state sensing circuit KR890005718Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019860003099U KR890005718Y1 (en) 1986-03-14 1986-03-14 Telephone line state sensing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019860003099U KR890005718Y1 (en) 1986-03-14 1986-03-14 Telephone line state sensing circuit

Publications (2)

Publication Number Publication Date
KR870015570U true KR870015570U (en) 1987-10-26
KR890005718Y1 KR890005718Y1 (en) 1989-08-25

Family

ID=19249557

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019860003099U KR890005718Y1 (en) 1986-03-14 1986-03-14 Telephone line state sensing circuit

Country Status (1)

Country Link
KR (1) KR890005718Y1 (en)

Also Published As

Publication number Publication date
KR890005718Y1 (en) 1989-08-25

Similar Documents

Publication Publication Date Title
DK590187A (en) PRINTED-ANTENNA circuit
DK638687A (en) BAEREBELGEREGREPRODUCING CIRCUIT
KR880701485A (en) Circuit protector
PT84929A (en) TELEPHONE SUBSCRIBER CIRCUIT
DK683888A (en) TELEPHONE CIRCUIT
KR870015570U (en) Line condition detection circuit of telephone
KR870015571U (en) Parallel line condition detection circuit of telephone
KR880001468U (en) Call state detection circuit of branched phone
KR880020754U (en) Detection circuit for use of telephone line
KR880005424U (en) Call state detection circuit of branched phone
KR860004399U (en) Ring detection circuit of telephone using mycom
KR850004535U (en) Signal detection circuit of cordless phone
KR870012789U (en) Ring signal detection circuit
KR890005806U (en) CO Line Detection Circuit
KR900012553U (en) Combustion detection circuit of combustion equipment
DK689687D0 (en) PHONE PROTECTION CIRCUIT
KR860015259U (en) Alarm phone call circuit
KR880008891U (en) Telephone voice discrimination circuit
KR870017483U (en) Indicator driving circuit of telephone
KR880010911U (en) Call holding signal generating circuit of telephone
KR870011506U (en) Telephone circuit
KR870015569U (en) Phone call circuit
KR870019298U (en) State change detection circuit
KR870017093U (en) Peak detection circuit
KR880001236U (en) Alarm circuit

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
REGI Registration of establishment
LAPS Lapse due to unpaid annual fee