JPH02133045U - - Google Patents

Info

Publication number
JPH02133045U
JPH02133045U JP4046289U JP4046289U JPH02133045U JP H02133045 U JPH02133045 U JP H02133045U JP 4046289 U JP4046289 U JP 4046289U JP 4046289 U JP4046289 U JP 4046289U JP H02133045 U JPH02133045 U JP H02133045U
Authority
JP
Japan
Prior art keywords
main device
telephones
central office
switch circuit
telephone exchange
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.)
Pending
Application number
JP4046289U
Other languages
English (en)
Japanese (ja)
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 filed Critical
Priority to JP4046289U priority Critical patent/JPH02133045U/ja
Publication of JPH02133045U publication Critical patent/JPH02133045U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Interface Circuits In Exchanges (AREA)
JP4046289U 1989-04-07 1989-04-07 Pending JPH02133045U (US20030157376A1-20030821-M00001.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4046289U JPH02133045U (US20030157376A1-20030821-M00001.png) 1989-04-07 1989-04-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4046289U JPH02133045U (US20030157376A1-20030821-M00001.png) 1989-04-07 1989-04-07

Publications (1)

Publication Number Publication Date
JPH02133045U true JPH02133045U (US20030157376A1-20030821-M00001.png) 1990-11-05

Family

ID=31550273

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4046289U Pending JPH02133045U (US20030157376A1-20030821-M00001.png) 1989-04-07 1989-04-07

Country Status (1)

Country Link
JP (1) JPH02133045U (US20030157376A1-20030821-M00001.png)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52108708A (en) * 1976-03-10 1977-09-12 Nec Corp Impedance automatic control system at the time of multiplex call

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52108708A (en) * 1976-03-10 1977-09-12 Nec Corp Impedance automatic control system at the time of multiplex call

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