KR880013984U - Ring signal detection and loop check circuit of trunk line connection circuit - Google Patents

Ring signal detection and loop check circuit of trunk line connection circuit

Info

Publication number
KR880013984U
KR880013984U KR2019860021121U KR860021121U KR880013984U KR 880013984 U KR880013984 U KR 880013984U KR 2019860021121 U KR2019860021121 U KR 2019860021121U KR 860021121 U KR860021121 U KR 860021121U KR 880013984 U KR880013984 U KR 880013984U
Authority
KR
South Korea
Prior art keywords
circuit
signal detection
line connection
trunk line
ring signal
Prior art date
Application number
KR2019860021121U
Other languages
Korean (ko)
Other versions
KR900004647Y1 (en
Inventor
홍계성
Original Assignee
삼성전자주식회사
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 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to KR2019860021121U priority Critical patent/KR900004647Y1/en
Publication of KR880013984U publication Critical patent/KR880013984U/en
Application granted granted Critical
Publication of KR900004647Y1 publication Critical patent/KR900004647Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
KR2019860021121U 1986-12-24 1986-12-24 Ring signal sensing and loop current checking circuit KR900004647Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019860021121U KR900004647Y1 (en) 1986-12-24 1986-12-24 Ring signal sensing and loop current checking circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019860021121U KR900004647Y1 (en) 1986-12-24 1986-12-24 Ring signal sensing and loop current checking circuit

Publications (2)

Publication Number Publication Date
KR880013984U true KR880013984U (en) 1988-08-31
KR900004647Y1 KR900004647Y1 (en) 1990-05-25

Family

ID=19258314

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019860021121U KR900004647Y1 (en) 1986-12-24 1986-12-24 Ring signal sensing and loop current checking circuit

Country Status (1)

Country Link
KR (1) KR900004647Y1 (en)

Also Published As

Publication number Publication date
KR900004647Y1 (en) 1990-05-25

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Legal Events

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N231 Notification of change of applicant
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 20010425

Year of fee payment: 12

EXPY Expiration of term