JPS57180290A - Outgoing trunk repetitive selection system - Google Patents
Outgoing trunk repetitive selection systemInfo
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Exchange Systems With Centralized Control (AREA)
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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57112193A (en) * | 1980-12-29 | 1982-07-13 | Fujitsu Ltd | Waiting system for vacant outgoing channel |
-
1981
- 1981-04-30 JP JP6548081A patent/JPS57180290A/en active Granted
Patent Citations (1)
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)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA1110746A (en) | Finite storage-time queue | |
CA1301293C (en) | Key telephone system | |
US4139739A (en) | Telecommunications call back system | |
US5365572A (en) | Cordless key telephone system with multiple tenant facility | |
EP0896780B1 (en) | Method, device and telecommunication system for providing a consistent set of services to a roaming user | |
CA2088420A1 (en) | Method of Establishing Communication Link to One of Multiple Devices Associated with Single Telephone Number | |
CA1281112C (en) | Communication system having automatic call route selection | |
GB1449063A (en) | Electronic time-division-multiplexed pabx telephone system | |
US5027341A (en) | Station line switching control system | |
CA2091278A1 (en) | Unique Ringing on a Prime Telephone Line | |
ES8202228A1 (en) | Circuit arrangement for a telephone exchange, particularly for a private automatic branch exchange, with a message store for recalling. | |
CA2073066C (en) | Private telephone system with simplified command feature | |
NO882662D0 (en) | PROCEDURE FOR A COMPUTER-CONTROLLED SWITCH DEVICE, SPECIFICALLY FOR A SPECIAL KEY PHONE SWITCH DEVICE WITH OPTION FOR CALL FORWARD CONNECTION. | |
JPS57180290A (en) | Outgoing trunk repetitive selection system | |
RU2000125541A (en) | COMMUNICATION SYSTEM | |
GB2171274A (en) | Telephone subset | |
KR950014623B1 (en) | Dtmf digit sending circuit and method | |
KR950003687B1 (en) | Call forwarding method by specifing acertain trunk | |
KR100251437B1 (en) | Digital telephone communication system | |
JPS5619265A (en) | Automatic transfer control system | |
US2767250A (en) | Automatic telephone exchange | |
JP2558622B2 (en) | Detour connection notification method | |
SU775857A1 (en) | Method of automatic switching in communication system | |
KR900006776B1 (en) | Processing method limiting some of called subscribers in pabx | |
KR820002130B1 (en) | Digital frame synchronizing circuit |