JPS58106984A - Idle subscriber selecting and connecting system - Google Patents

Abstract

PURPOSE:To select one idle subscriber from plural called subscribers to connect it to a calling subscriber, by adding a called subscriber number storage device to an originating register. CONSTITUTION:When a calling subscriber A hooks off to connect the trunk tone, the subscriber's telephone set A is connected to an originating register ORT. A called subscriber number storage device DNMU is connected to this register ORT in one by one. When plural called subscriber numbers which the calling subscriber A wants to call are dialed continuously in the subscriber's telephone set A, this information is transferred to the device DNMU through the register ORT and is stored in a storage circuit of the device DNMU. A central controller CCU checks called subscribers for the idle state in order of dial on a basis of information transferred from the device DNMU and connects the calling subscriber A and a selected idle called subscriber, for example, D through a local trunk LOT.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an empty subscriber selection method in automatic private branch exchange service.

In a conventional automatic private branch exchange system, an extension subscriber.

If the attendant or dedicated line incoming trunk (hereinafter collectively referred to as the caller) encounters the called subscriber who wishes to make a call while the caller is talking, he or she may dial the last digit of the caller to identify the caller. There are ways to connect the called party. In this system, another called subscriber is limited to a subscriber whose last digit differs from the first called subscriber dialed by the caller, which is unreasonable due to the fixed number plan. For example, if there are subscribers in the 2230s and 2240s on the same line, and the first subscriber in the 2230s is busy, in order to call the subscriber in the 2240s, the caller must call 0NHOOKI once.
, and then had to send the call again.

Also, when a group phone system is adopted, an unoccupied subscriber within the group can answer the call, but if the extension group is different, an unoccupied extension cannot receive a call from another extension group. .

The object of the present invention is to transmit information of a plurality of called subscribers from a caller with a single dial operation, select only one empty subscriber from among the plurality of called subscribers, and communicate with the caller. This provides an idle subscriber selection connection method that performs connections.

The vacant subscriber selection connection system of the present invention is connected to a dial receiving device of an automatic private branch exchange, and includes a storage circuit for a plurality of called numbers, a circuit for transmitting a vacant subscriber selection connection code, and a transmission circuit for transmitting caller accommodation location information. a called subscriber number storage device having a circuit, an idle busy information receiving circuit, and an idle busy check counter circuit; a subscriber information receiving circuit for receiving information, a busy identification circuit for transmitting idle information to the idle busy information receiving circuit, and a special sound sending circuit for receiving check information from the counter circuit and controlling the normal special sound fs field means. A central control unit having a control circuit is provided, and when a caller desires to connect to any one of a plurality of called subscribers, an idle subscriber selection connection code is sent from a calling telephone. Then, by successively transmitting a plurality of desired called subscriber numbers, a plurality of called subscriber information (t) is stored in the called subscriber number storage device, and the called subscriber numbers are stored in the dialing order. Perform a busy check.

While an idle subscriber is selected and connected to the caller, the check counter circuit during the called subscriber's 9 calls increments a count every time the called subscriber's idle call is separated, and the counter is activated when an idle subscriber is selected. The system is characterized in that it sends a special sound to the number of people in heat to notify the caller of which number of called parties has been selected.

Next, one embodiment of the present invention will be described with reference to FIGS. 1 and 2.

Figure 1 is a relay system diagram of a private branch exchange according to the present invention;
The figure shows a central control unit according to an embodiment of the present invention.

FIG. 2 is a block circuit configuration diagram of a calling register and a called subscriber number storage device.

In FIG. 1, when the calling subscriber (5) performs 0FFHOOK and dial tone connection is established, the subscriber's telephone sets the calling register trunk (hereinafter referred to as calling register) 01 (T Kl).
It is continued. The calling register 01 (T is called subscriber number storage device 1) and NMU are connected on a one-to-one basis. When a person dials the empty subscriber selection code after receiving the dial -/, it is dialed in the outgoing register 01 (,T) and this information is sent to the central control shell @CCU.At the same time, outgoing register 01 (,T is the outgoing Sends an empty subscriber selection code to the called subscriber number storage device along with caller accommodation location information received from the central control unit CCU and temporarily stored at the time of tone connection;
This is stored in the device. After receiving and identifying the empty subscriber selection code, the central control unit CCU sends a dial tone from the second dial tone trunk SDT to the calling telephone A to prompt it to receive the called subscriber number. Second dial tone trunk 81) The calling telephone person who receives the tone from T enters the numbers of the called parties with whom he/she wishes to talk in BBB and CCC.

Dial continuously like DDD. These dialing information are transferred to the called subscriber number storage unit DNMU via the originating register ORT and stored in the storage circuit in the device DNMU. When the called party number storage unit bNMU completes the storage of all called subscribers, it is dialed first to check whether the friend called subscriber B is busy, and the previously stored free subscriber selection connection code and the calling party are dialed. The dial number (BBB) of the called subscriber B is sent to the central processing unit CCU together with the calling subscriber accommodation location information. The central processing unit CCU detects the busy status of the called subscriber B based on text information sent from the called subscriber number storage unit DNMU, and reads the busy information from the storage unit DNMUO if the called subscriber B is busy. Reply to busy information. The called party number storage unit DNMU receives this busy information from the central processing unit CCU and increments the called subscriber check counter by one. CCC)1
Then, it is sent to the central processing unit CCU together with the vacant subscriber selection code and call accommodation location information. Thereafter, the called subscriber number is received in the same way, and the all-busy check is returned to ft)-, and if an empty called subscriber is found, the central processing unit CCIJ is sent to the called subscriber number storage device. The scissors storage device DNMU, which sends the empty information to the empty information read of the DNMU, increments the counter, returns all busy check information to the central processing unit CCU, sends 1 after t, and recovers with the register ORT.

Next, the central processing unit CCU analyzes all busy check information, selection code, accommodation location information, and empty selected called subscriber number, and sends a special tone for the number of check circuits to the calling subscriber via the special tone trunk 8PT. , and then connects the calling subscriber A with an unselected called subscriber (for example, D) via the inter-extension trunk IOT.

The above description has been made using an example in which the caller is an extension subscriber, but the same system is possible even if the calling subscriber A is replaced with a relay stand operator or a dedicated line incoming trunk. In particular, this connection method can be expected to be more effective in connection with leased line incoming calls.

FIG. 2 is a block circuit configuration diagram of an embodiment of the calling register 0xT, called party number storage unit DNMU, and central processing unit CCU according to the present invention, and shows the main circuits shown in FIG. 1. In the called party number storage device DNMU, SPN is a circuit for sending an empty subscriber selection connection code, EN is a circuit for sending out calling subscriber accommodation location information, BBB, CCC, and DDD are called subscriber number storage circuits, and ID is an empty subscriber number storage circuit. Receiving circuit for subscriber selection information.

BY indicates the called subscriber busy information receiving circuit, CNT indicates the all busy check counter circuit, and SOB REC in the central processing unit indicates the subscriber information receiving circuit, I/BDT.
8TCON indicates an all-busy identification circuit, and 8TCON indicates a special sound transmission control circuit. In addition, information leads ■ to ■ indicate information transfer routes in each arrow direction, ■ indicates a sending route of an empty subscriber selection code,
■ is a route for sending out a vacant subscriber selection code along with calling subscriber accommodation location information; ■ is a sending route for these accommodation locations and selection codes; ■-B, C, and D are sending routes for called subscriber numbers; indicates the route for sending out all busy information of the called party, ■ indicates the sending route for all busy check information, these routes ■ to ■ are performed sequentially from route ■, and finally ■
The calling subscriber A and the called subscriber (e.g. D)
It can be determined that the two are connected.

As explained above, the present invention adds a called subscriber number storage device to the calling register, and by dialing an empty subscriber selection connection code, an empty subscriber can be selected from among a plurality of called subscribers. This has the effect that it is possible to selectively connect to a calling party, thereby improving service to the calling party and increasing connection efficiency within the private branch exchange.

[Brief explanation of the drawing]

FIG. 1 is a relay system diagram of a private automatic branch exchange in the present invention,
FIG. 2 is a block diagram showing an embodiment of the present invention. A, B, C, D...Extension telephone, ORT...
... Calling register, DNMU ... Called subscriber number storage unit %CCU ... Central control unit, 5
IJT・・・Second dial tone trunk,
SPT...Special sound transmission trunk, IOT...
... Inner group mutual trunk, SW ... Call omitted switch, SPN ... Empty subscriber selection connection code sending circuit, EN ... Calling subscriber accommodating position information Sending circuit, BBB, DDD... Called subscriber number storage circuit, ID... Empty subscriber selection information receiving circuit, B
Y...Target participant busy information receiving circuit, CNT/
...Check counter circuit during all calls, 5UB)L
BC...Subscriber information receiving circuit, I/B DT
...All busy identification circuit, 8TCON...
・Special sound transmission control circuit, ■～■... Information transfer route.

Claims (1)

[Scope of Claims] Connected to a dial receiving device of an automatic private branch exchange device, a circuit for accumulating a plurality of called numbers, a circuit for transmitting an idle subscriber selection connection code, a circuit for transmitting caller accommodation location information, and a circuit for transmitting caller accommodation location information, and a circuit for transmitting caller accommodation location information. a called subscriber number storage device having an information receiving circuit and an idle busy check counter circuit; a subscriber information receiving circuit connected to the dial receiving device and the called subscriber number storage device KII and receiving from the cough device; A central control unit 11 having a busy-busy discrimination circuit that sends busy-busy information to the busy-busy information receiving circuit, and a special sound sending control circuit that receives check information from the counter circuit and controls a normal special sound sending means.
When a caller wishes to connect to an empty subscriber among a plurality of called subscribers, the request is made following the transmission of an empty subscriber selection connection code from a calling telephone. By successively transmitting a plurality of called subscriber numbers, information on a plurality of called subscribers is stored in the called subscriber number storage device, and a busy check of the called subscriber is performed in dialing order. Kazuyoshi selects an idle subscriber and connects with the caller, and the called subscriber's idle check counter circuit counts up each time the idle call identification of the called subscriber is completed, and the counter when an idle subscriber is selected. An empty subscriber selection connection method characterized in that a special tone is sent to the caller as many times as the caller to notify the caller of which number of called callers has been selected.