JPH04245793A - Pbx extension direct dialing system - Google Patents

Abstract

PURPOSE:To directly terminate a prescribed extension telephone set (a person in change) by connecting an additional number by direct dialing to an extension of a PBX. CONSTITUTION:The PBX 1 includes a subscriber's circuit 2 for storing an additional number telephone set, a DP/PB selecting circuit 3 and an additional dialing request sending circuit 8, an additional dialing receiving equipment 4 is connected between the subscriber circuit 2 and plural subscriber's telephone sets and constituted of a PB signal receiving circuit 5 for receiving an additional dialing PB signal from the circuit 2, a telephone set selecting circuit 6 for selecting a corresponding additional number telephone set from the PB signal, and a switch circuit 7 for connecting the corresponding additional number telephone set base on an instruction from the circuit 6 and the PBX extension DID system is constituted so that an additional dialing number request tone is sent from the PBX to a DP or PB originating subscriber at the time of terminating from the originating subscriber to the additional number telephone set and the termination is connected to the corresponding additional number telephone set based o the additional dialing number applied from the originating subscriber.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PBX extension dial-in system, and more particularly, to a PBX dial-in system in which a dial-in connection is made to a PBX extension and a call is directly received at a predetermined extension telephone (person in charge) using an additional number.

[0002] PBX dial-in methods include a method in which each PBX subscriber is assigned a unique dial number, and a method in which the subscriber is connected to an extension telephone using an additional number. P.B.
A system configuration diagram of the X dial-in method is shown in FIG. Figure (a) shows the direct-in system, and Figure (b) shows the additional dial system.

[0003] The direct-in method shown in Figure (a) has a subscriber number for each extension telephone, has a trunk trunk at the NTT station that captures the PBX station number, and has a conversion table between the extension number and the subscriber number at the PBX. PB from the originating subscriber
This method connects directly to an extension telephone using the subscriber number of X. PBX subscriber number 044-754-3199
If the main number of the PBX is 044-754-1111 and the extension number of the corresponding PBX is 2561, then the caller's number 044-754-3199 calls N.
The trunk trunk of the TT station can acquire the PBX, convert 3199 to 2561 using the PBX's conversion table, and call the corresponding extension telephone.

[0004] The additional dialing system shown in FIG. 2(b) has an additional number calling request circuit in the central office line trunk of the PBX, and a call is received at the central office trunk using the representative number of the PBX, and the additional number dialing request circuit is used to send a dial-in additional number. This method notifies the calling subscriber of a dialing request by voice or signal, and automatically calls the extension subscriber using an additional number from the calling subscriber. P
If the BX main number is 044-777-1111 and the extension subscriber's additional number is 123, the calling subscriber is 0.
Extension subscribers can be called directly by dialing 44-777-1111-123. Furthermore, PB
If there is a switchboard operator at X, you can use the main number to make an extension connection as in the past.

[0005] The above-mentioned PBX dial-in method is a dial-in service performed from a central office exchange to a PBX.
Each extension subscriber has its own subscriber number or additional number, and the originating subscriber uses that number to call the corresponding terminating subscriber. Therefore, the telephone belongs exclusively to the person in charge, and in order to use the subscriber's line for other purposes, it is necessary to make a call or some other method. Particularly when subscriber lines are shared in dormitories, company housing, etc., intermediaries and transfers are necessary.

[0006]

2. Description of the Related Art A connection configuration diagram of a conventional PBX extension dial-in system is shown in FIG. Figure (a) shows a case where a plurality of telephone sets are connected to one subscriber line, and Figure (b) shows a case where one telephone set is connected to one subscriber line.

In the case of FIG. 2(a), a plurality of telephones 23, 2 are connected to the subscriber line connected to the subscriber circuit 22 of the PBX 21.
4 are connected in parallel, and each telephone is used by a plurality of persons A, B, C, and D. The subscriber line 22 has a dial-in number 2561, and a dial-in connection to 2561 calls the telephone 23 or 24, but if the person in charge who picks up the receiver is not the person in charge, it is necessary to transfer to the appropriate person. As a result, each person in charge cannot use their own telephone exclusively, but instead has to share it. Therefore, as a dedicated telephone, services such as answering machine recording, email, camp-on (a service that connects when the other party is busy) cannot be used.

In the case of FIG. 3(b), a plurality of subscriber circuits 32, 33, 34, and 35 of the PBX 31 have dedicated telephones 36, 37, 38, and 39, respectively, and each telephone is used by personnel A and B. , C, and D. Subscriber circuits 32, 33, 34, 35 have extension number 25
Connected by 61, 2562, 2563, 2564,
Telephones 36 and 37 due to incoming calls to their respective extension numbers.
, 38, and 39 are called separately, and each person in charge A
, B, C, and D can talk individually by picking up the handset. Therefore, it is possible to use services such as answering machine, email, camp-on, etc. as a dedicated telephone, but it is difficult because the equipment cost increases because each subscriber has a separate line, and the capacity of the PBX subscriber line is limited. .

[0009]

[Problems to be Solved by the Invention] In the conventional PBX extension dial-in system, when multiple telephones are connected to one subscriber line, the service as a dedicated telephone cannot be used; If a telephone is connected to each line, the service as a dedicated telephone can be used, but equipment costs will increase because each subscriber has a separate line.

[0010] The present invention makes a dial-in connection to the extension of the PBX, connects a plurality of telephones to one subscriber line, and adds an additional number so that a predetermined extension telephone (person in charge) can be directly contacted. The purpose of this invention is to provide an economical PBX extension dial-in method for receiving calls.

[0011]

[Means for Solving the Problems] A diagram of the principle configuration of the present invention is shown in FIG. In the figure, 1 is a PBX, 2 is a subscriber circuit having an extension dial-in number, 3 is a DP/PB selection circuit provided in the PBX, and 4 is provided between the subscriber circuit and a plurality of subscriber telephones. additional dial receiving device, 5
6 is a PB signal receiving circuit provided in the additional dial receiving device and receives an additional dial PB signal from the subscriber circuit; 6 is a telephone selection circuit that selects a corresponding additional number telephone according to the PB signal; and 7 is the telephone. a switch circuit that connects the corresponding additional number telephone according to the instructions of the selection circuit; 8;
indicates the additional dial request sending circuit of the PBX.

[0012] In response to an incoming call from a DP or PB subscriber to an additional number telephone, the PBX sends an additional dial number request tone to the calling subscriber, and selects the corresponding additional number telephone based on the additional dial number from the calling subscriber. and configure it to connect.

[0013]

[Operation] A processing flowchart of the present invention is shown in FIG. The figure shows the processing flow of the additional dial receiving device 4 connected to the PBX 1 and the subscriber circuit 2. ■． When the subscriber circuit 2 of the PBX 1 receives a call, the additional dial receiving device 4 is connected, and the PB signal receiving circuit 5 is connected to the subscriber circuit 2 via the switch S1 of the switch circuit 7. ■． PBX1 prompts the caller to dial an additional number, and that additional dial is the DP.
If it is a (dial pulse) signal, the DP/PB selection circuit 3 converts it into a PB (multifrequency band) signal and sends it to the PB signal receiving circuit 5. ■． The PB signal receiving circuit 5
It receives the additional dialing by the B signal, recognizes the additional number, and sends the additional number to the telephone selection circuit 6. ■． The telephone selection circuit 6 selects the switch corresponding to the additional dial, and selects the corresponding switch S2 of the switch circuit 7.
Close. The switch S1 of the switch circuit 7 switches the subscriber line from the PB signal receiving circuit 5 side to the switch S2 side. ■． The PBX 1 sends out a paging signal to the subscriber line after a certain timing by the subscriber circuit 2. ■．
The bell of the extension telephone connected to the corresponding switch S2 of the switch circuit 7 rings, and the person in charge of the telephone can directly pick up the receiver and talk to the caller.

[0014]

Embodiment FIG. 3 shows a block diagram of an embodiment of the present invention. In the figure, 11 is a PBX, 12 is a subscriber circuit, 1
3 is a DP/PB selection circuit, 14 is an additional dial reception circuit, 15 is a PB signal reception circuit, 16 is a telephone selection circuit, 1
7 is a switch circuit, 18 is an additional dial request sending circuit, the calling subscriber's number is "2780", the additional dial subscriber's number is "2561", additional number telephones A, B,
The numbers of C and D are "2561-1" and "2561" respectively.
-2", "2561-3", and "2561-4".

The telephone selection circuit 16 drives a switch relay S1 and a plurality of switch relays S2 of a switch circuit 17 by a selection signal, and the switch relay S2 operates switch relays S21, S22, S23, and S2 for each additional number.
Consists of 24. The DP/PB selection circuit 13 of the PBX 1 consists of a PB signal reception circuit and a DP signal reception conversion circuit,
When a PB signal is received, the additional number is sent to subscriber circuit 1.
2, and when the DP signal is received, the additional number is converted from the DP signal to a PB signal and sent to the subscriber circuit 12. PBX1
1 has an additional dial request sending circuit 18, which requests the subscriber to make additional dials by a voice saying "please make additional dials" or by a signal of "beep".

FIG. 4 shows an operation timing chart of the embodiment of the present invention. The figure shows the operation between a caller, a PBX, an additional dial receiver (ADR), and a called party. Sender"
The following describes the case where the called party "2561-1" is called from "2780". (1) The caller "2780" goes off-hook, connects to the PBX, hears the connection tone from the PBX, and dials the called party's dial-in number "2561". (2) The PBX receives the number “2561” and dials “2561”.
Check whether the number "2561" is an ADR subscriber, and if it is not an ADR subscriber, call the called party "2561". (3) If the number "2561" is an ADR subscriber, call the called party "2561".
561" is available, and if there is no space, a busy tone is sent to the caller. (4) If "2561" is available, P is sent to ADR.
Instructs connection to BR (PB signal receiving circuit). (5) The ADR switches S1 of the switch circuit to the PBR side and completes the preparation for receiving PBR. (6) The PBX sends an additional dial request tone to the caller "2780" to request additional dialing. (7) The caller hears the request tone from the PBX and dials the additional dial "1" of the corresponding subscriber. (8) If the additional dial is DP, the PBX converts it to PB, and if it is PB, it directly sends the additional number to ADR. (9) The ADR receives the PB signal, identifies the number "1", and selects the telephone "2561-1". (10) ADR switches the switch S1 and turns on the switch S21 to complete the selection. (11) The PBX learns that the connection preparation is complete upon completion of selection from the ADR, and sends a ring tone to the called party "2561-1". (12) When the called party goes off-hook, the caller
2780" and the called party "2561-1". (13) When the call ends and the caller and the called party go on-hook, the ADR switches S1 and S21 are also restored.

[0017]

[Effects of the Invention] According to the present invention, one extension can be used personally by multiple people, and the same effect as accommodating several times as many subscribers as the current PBX subscriber capacity can be achieved. be. Also, the existing additional number dial-in method is P.
Only B subscribers could use it, but DP/PB was installed on the PBX.
By providing a conversion circuit, even DP subscribers can use additional number dial-in.

[Brief explanation of the drawing]

[Figure 1] Principle configuration diagram of the present invention

[Figure 2] Processing flowchart of the present invention

[Figure 3]
Block configuration diagram of the embodiment

[Figure 4] Operation timing chart of the embodiment

[Figure 5]
Current system configuration diagram

[Figure 6] Connection configuration diagram of conventional example

[Explanation of symbols]

1, 11, 21, 31 PBX 2, 12, 22, 32, 33, 34, 35 Subscriber circuit 3, 13 DP/PB selection circuit 4, 14 Additional dial reception device 5, 15 PB signal reception circuit 6, 16 Telephone set Selection circuit 7, 17 switch circuit

Claims (2)

[Claims] Claim 1: A subscriber circuit (2) for accommodating an additional number telephone in a PBX (1), and a DP/PB selection circuit (3) for converting an input signal to a PB signal and selecting the PB signal when the input signal is a DP signal. ) and an additional dial request sending circuit (8), an additional dial receiving device (4) is provided between the subscriber circuit (2) and the plurality of additional number telephones, and the additional dial receiving device (4) is a PB signal receiving circuit (5) that receives an additional dial PB signal from the subscriber circuit (2);
It consists of a telephone selection circuit (6) that selects a corresponding additional number telephone according to a signal, and a switch circuit (7) that connects the corresponding additional number telephone according to instructions from the telephone selection circuit. A PBX extension dial-in system characterized in that in response to an incoming call to a PBX, a PBX sends an additional dial request tone to a calling subscriber, and the additional number from the calling subscriber is used to connect to a corresponding additional number telephone. [Claim 2] The calling subscriber to the additional number telephone is D.
2. The PBX extension dial-in system according to claim 1, wherein in the case of a P subscriber, the signal is converted into a PB signal within the PBX and connected to the corresponding telephone.