JPS54134907A - Connectin control system for echo suppressor - Google Patents

Connectin control system for echo suppressor

Info

Publication number
JPS54134907A
JPS54134907A JP4211278A JP4211278A JPS54134907A JP S54134907 A JPS54134907 A JP S54134907A JP 4211278 A JP4211278 A JP 4211278A JP 4211278 A JP4211278 A JP 4211278A JP S54134907 A JPS54134907 A JP S54134907A
Authority
JP
Japan
Prior art keywords
suppressor
trunks
network
echo
echo suppressor
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
JP4211278A
Other languages
Japanese (ja)
Inventor
Hiroshige Usuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4211278A priority Critical patent/JPS54134907A/en
Publication of JPS54134907A publication Critical patent/JPS54134907A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Abstract

PURPOSE:To reduce the number of facilities of an echo suppressor used for a telephone switchboard, by connecting both input and output terminals of the echo suppressor via a network connected to a call trunk after sending a selective numeral when a call requiring echo suppressing is made. CONSTITUTION:In the connection control system of echo suppressor 4 used for a telephone switchboard, input and output terminals of suppressor 4 are both connected to equipment terminal sides of trunks 2 and 3, and 5 and 6 of network 1 which has two-way trunks 2 and 3 used for an international circuit and incoming trunks 5 and 6 from adomestic network. After a selective numeral is sent out in case of a call requiring suppressor 4, suppressor 4 is connected in series to trunks 2 and 3, and 5 and 6 via network 1. Then, the constitution of the circuit is simplified with expensive suppressors 4 reduced in number.
JP4211278A 1978-04-12 1978-04-12 Connectin control system for echo suppressor Pending JPS54134907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4211278A JPS54134907A (en) 1978-04-12 1978-04-12 Connectin control system for echo suppressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4211278A JPS54134907A (en) 1978-04-12 1978-04-12 Connectin control system for echo suppressor

Publications (1)

Publication Number Publication Date
JPS54134907A true JPS54134907A (en) 1979-10-19

Family

ID=12626863

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4211278A Pending JPS54134907A (en) 1978-04-12 1978-04-12 Connectin control system for echo suppressor

Country Status (1)

Country Link
JP (1) JPS54134907A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219058A (en) * 1983-05-27 1984-12-10 Toshiba Corp Exchange for loudspeaker telephone set

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219058A (en) * 1983-05-27 1984-12-10 Toshiba Corp Exchange for loudspeaker telephone set

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