JPS57180290A - Outgoing trunk repetitive selection system - Google Patents

Outgoing trunk repetitive selection system

Info

Publication number
JPS57180290A
JPS57180290A JP6548081A JP6548081A JPS57180290A JP S57180290 A JPS57180290 A JP S57180290A JP 6548081 A JP6548081 A JP 6548081A JP 6548081 A JP6548081 A JP 6548081A JP S57180290 A JPS57180290 A JP S57180290A
Authority
JP
Japan
Prior art keywords
outgoing
subscriber
selection signal
signal information
trunks
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
JP6548081A
Other languages
Japanese (ja)
Other versions
JPH0332278B2 (en
Inventor
Kazuo Yamawaki
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6548081A priority Critical patent/JPS57180290A/en
Publication of JPS57180290A publication Critical patent/JPS57180290A/en
Publication of JPH0332278B2 publication Critical patent/JPH0332278B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Abstract

PURPOSE:To disperse load equally to each path and to improve the service, by selecting an outgoing trunk repetitively with the dialing of a subscriber, without requesting any operation to a subscriber encountered when all outgoing trunks are busy. CONSTITUTION:When an extension subscriber S1 dials selection signal information, with a central control unit CC connected to an exchange switch SWN, outgoing trunks T1-TN included in a selectable outgoing path or alternative outgoing path predetermined with the selecting signal information confirm if they are used with other extension subscribers S2-SN. In this case, the selection signal informations DC0-DC3 are stored in a storage device MM and a special signal tone informing outgoing waiting is transmitted from a special signal tone transmitter SPT to a subscriber S1 to wait for the subscriber S1 in off-hook state. Next, the CC reads out the selection signal information stored in the MM and monitors the state of the trunks T2-TN sequentially and when vacant state takes place, the selection signal information is transmitted to the opposing station via an outgoing sender trunk OST.
JP6548081A 1981-04-30 1981-04-30 Outgoing trunk repetitive selection system Granted JPS57180290A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6548081A JPS57180290A (en) 1981-04-30 1981-04-30 Outgoing trunk repetitive selection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6548081A JPS57180290A (en) 1981-04-30 1981-04-30 Outgoing trunk repetitive selection system

Publications (2)

Publication Number Publication Date
JPS57180290A true JPS57180290A (en) 1982-11-06
JPH0332278B2 JPH0332278B2 (en) 1991-05-10

Family

ID=13288295

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6548081A Granted JPS57180290A (en) 1981-04-30 1981-04-30 Outgoing trunk repetitive selection system

Country Status (1)

Country Link
JP (1) JPS57180290A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63187758A (en) * 1987-01-29 1988-08-03 Fujitsu Ltd Callee calling control system
JP2009063250A (en) * 2007-09-07 2009-03-26 Miura Co Ltd Cooling apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57112193A (en) * 1980-12-29 1982-07-13 Fujitsu Ltd Waiting system for vacant outgoing channel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57112193A (en) * 1980-12-29 1982-07-13 Fujitsu Ltd Waiting system for vacant outgoing channel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63187758A (en) * 1987-01-29 1988-08-03 Fujitsu Ltd Callee calling control system
JP2009063250A (en) * 2007-09-07 2009-03-26 Miura Co Ltd Cooling apparatus

Also Published As

Publication number Publication date
JPH0332278B2 (en) 1991-05-10

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