JPS63187857A - Digital exchange network - Google Patents

Digital exchange network

Info

Publication number
JPS63187857A
JPS63187857A JP1852987A JP1852987A JPS63187857A JP S63187857 A JPS63187857 A JP S63187857A JP 1852987 A JP1852987 A JP 1852987A JP 1852987 A JP1852987 A JP 1852987A JP S63187857 A JPS63187857 A JP S63187857A
Authority
JP
Japan
Prior art keywords
exchange
relay line
metallic
signal
control signal
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.)
Granted
Application number
JP1852987A
Other languages
Japanese (ja)
Other versions
JP2505441B2 (en
Inventor
Noriyuki Kawamura
Koji Kogure
Original Assignee
Nippon Telegr & Teleph Corp <Ntt>
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 Nippon Telegr & Teleph Corp <Ntt> filed Critical Nippon Telegr & Teleph Corp <Ntt>
Priority to JP1852987A priority Critical patent/JP2505441B2/en
Publication of JPS63187857A publication Critical patent/JPS63187857A/en
Application granted granted Critical
Publication of JP2505441B2 publication Critical patent/JP2505441B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To obtain an economical exchange network by providing an analog trunk as an interface to a metallic relay line and a PCM terminal equipment to one digital exchange and utilizing them by plural exchanges.
CONSTITUTION: When the connection from an exchange 1 to the metallic relay line 6 is desired, the exchange 1 uses an MF signal transmitter-receiver and a supervisory signal transmitter-receiver in relay line signal equipments 15, 25 to transmit/receive a required control signal with an exchange 2, the exchange 2 uses an analog trunk 27 and a PCM terminal equipment 26 to convert the transmitted/received control signal as the control signal for the metallic relay line 6 and sends the result to the metallic relay line 6. The exchange 1 is connected to the metallic relay line 6 while using the exchange 2 as the relay exchange and when a holding signal is sent from an attendant board via the metallic relay line 6, the exchange 2 uses the analog trunk 27 and the PCM terminal equipment 26 to convert the terminated holding signal into a digital control signal defined separately and relays it to the exchange 1.
COPYRIGHT: (C)1988,JPO&Japio
JP1852987A 1987-01-30 1987-01-30 Digital exchange network Expired - Lifetime JP2505441B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1852987A JP2505441B2 (en) 1987-01-30 1987-01-30 Digital exchange network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1852987A JP2505441B2 (en) 1987-01-30 1987-01-30 Digital exchange network

Publications (2)

Publication Number Publication Date
JPS63187857A true JPS63187857A (en) 1988-08-03
JP2505441B2 JP2505441B2 (en) 1996-06-12

Family

ID=11974153

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1852987A Expired - Lifetime JP2505441B2 (en) 1987-01-30 1987-01-30 Digital exchange network

Country Status (1)

Country Link
JP (1) JP2505441B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5875244A (en) * 1994-03-18 1999-02-23 Fujitsu Limited Transmission apparatus for relaying different types of trunk signals
JP2012060887A (en) * 2010-09-14 2012-03-29 Zenri Tateyama Marine organism-trapping basket

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5875244A (en) * 1994-03-18 1999-02-23 Fujitsu Limited Transmission apparatus for relaying different types of trunk signals
JP2012060887A (en) * 2010-09-14 2012-03-29 Zenri Tateyama Marine organism-trapping basket

Also Published As

Publication number Publication date
JP2505441B2 (en) 1996-06-12

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term