JPS63114398A - Trunk line incoming connection system - Google Patents

Abstract

PURPOSE:To supervise the end of call of a caller at the time of incoming trunk call by adding a function calling back a caller to a PBX (private branch exchange) to apply the titled system to the national public network when the DISA (direct in-word system access) is adopted. CONSTITUTION:A CPU1 controls a channel 4 to connect a PBREC3 at an incoming call to a DISA reception office line trunk 5 to connect the call to a REC3. When a caller dials its own subscriber number and ID number successively, the CPU 1 stores the received caller number in a main storage device 2, sends an acknowledge end tone to restore once the office line trunk 5 and the caller hooks on at the time of hearing the said acknowledge tone. Then the PBX acquires a caller callback trunk 6 to send a selection signal to call back the caller. When the caller responds to it and dials a trunk line call number and the called party number, the PBX connects the office line trunk 6 and the called party trunk 7. The caller and the called party are connected by the trunk line call connection control when viewed from the PBX and the restoration of the both is supervised by a PBX.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for connecting incoming calls to a central office line of a private branch exchange (hereinafter referred to as PBX), and in particular, to a method for connecting incoming calls to a central office line using a central office line. The present invention relates to a recovery monitoring method for a calling party and a called party in Direct Inward System Access (hereinafter referred to as DISA), which is relayed and connected to an extension housed in a PBX other than a PBX or to a general subscriber through the PBX.

[Conventional technology]

In the conventional PBX incoming call connection system, as described in Japanese Patent Application Laid-Open No. 60-66555, a central office line subscriber directly calls an extension housed in the PBX, and DISA allows the central office to No consideration is given to connecting incoming calls from the line to other central office line subscribers via the PBX. Therefore, naturally, DISA
No consideration has been given to recovery methods.

[Problem that the invention seeks to solve]

The reason why conventional technology does not take into account the fact that incoming calls from a central office line are relayed to a public line via a PBX and connected to other PBX extensions or subscribers is because DISA is not regulated by law in Japan. This is because However, DISA has been approved in the United States and is already available to the public. DISA, which is practiced in the United States, connects to a PB receiver when a call is received from a PB telephone on a predetermined central office line, and the caller dials the ID number and called party number from the FB double signal. The PBX checks whether the dialed number is a pre-registered number, and if it is confirmed to be a registered number, it follows the previously received called party number and connects the leased line or central office line. Use the call to connect with the caller. This allows the caller to make a call to a called party outside the local area at the rate between the first PBX accessed, and the call rate between the PBX and the called party is billed to the PBX. It's going to happen. As a result, when you want to make a long-distance call for official business, you can use DISA of the recommended company's PBX.
This allows you to make calls at low rates.

In this way, DISA is a useful function and is in high demand in our country, so there is a possibility that laws and regulations will be relaxed in the future and it will be approved. However, if we try to apply the method currently used in the United States, in which the caller connects to the called party while holding up the handset, to Japan, the caller and PBX
Since this is an incoming connection from the PBX side, recovery cannot be monitored, and if the called party accidentally hangs up the phone, it may be impossible for both parties to recover. (In the case of the United States, the system uses a ground start method that allows for monitoring of recovery of the central office line.)In Japan, incoming calls to the central office line to the PBX are subject to the conditions for incoming calls and for the PBX in the restored state. are exactly the same, and it is well known that recovery on the station side cannot be monitored.

The object of the present invention is r) to provide a central office line terminating connection system which can be applied to the public networks of Japan when ISA is adopted, and which can monitor the termination of a calling subscriber when a central office line incoming call is received.

[Means for solving problems]

The purpose of the above is to receive and store the ID number and calling subscriber number sent from the caller, and then have the caller turn ON HOOK once and for all. Read the calling subscriber number.

After automatically calling back the calling subscriber from the PBX according to that number, the called subscriber number is received by the PB signal of the calling subscriber who answered, and from the PBX's point of view, the calling subscriber and the called subscriber are This can be achieved by using a method that makes both outgoing connections.

[Effect]

In the present invention, -1 caller (on-hook) (ONH00K
), and by adding a function that automatically calls back the caller from the PBX, both the caller and the called party are connected by the central office line origination connection from the PBX side, and the recovery of either can be monitored. Become.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram of a PBX that implements a central office line incoming call connection system according to an embodiment of the present invention and accommodates a central office line that allows additional dialing.
A channel network (NW) 4 comprising a FB receiver (MM) 2 and an FB receiver (PBRBC) 3 includes a central office line trunk 5 for DISA reception, a central office line trunk 6 for calling back the calling party, and a central office line trunk 7 for calling the called party. have.

The procedure for using the DI8A function in a PBX having such a configuration will be explained according to the flowchart shown in FIG.

When making a call to, for example, a remote location via a PBX, the calling subscriber dials a predetermined office line number to dial the DI 8-person office line trunk 5 (step 100). The CPUI identifies that there is an incoming call on the central office line trunk 5 (X0Z).

Control the call path 4 and connect the incoming call to PBRBC3 (
104).

The calling subscriber then dials his subscriber number and 11) number or extension on the PB telephone (1os
). When the CPU 1 receives the ID number, the CPU 1 indexes the extension number from a comparison table of ID numbers and extension numbers pre-installed in the main storage device 2 (108), and uses the indexed extension number or the received extension number. The calling subscriber is on the PB
Confirm that you are the user of the extension within X and store the received calling subscriber number in the main storage device 2 (110);
After this, a confirmation completion tone is sent to the calling subscriber (112)
. Then, the central office line trunk 5 is temporarily restored and placed in an empty state (114).

After the caller hears the confirmation tone, the caller goes on-hook (116). Thereafter, the PBX takes the timing up to this on-footer, and automatically seizes the central office line trunk 6 for callback after 30 seconds, for example.
a). Then, according to the calling subscriber number previously stored in the main storage device 2, a selection signal is sent out to call the calling party (120). When the caller answers (122), the PBX
is connected to a talkie device (not shown) for "callback"
After announcing the incoming call, it connects to PBREC3 (124). Then, when the calling party dials the central office line calling number (usually θ'') from the PB telephone, the PBX acquires the central office trunk 7 for calling the called party (126).
.

From then on, when the caller subsequently dials the called party number with the FB double signal, the PBX relays the pulse accordingly,
The central office line trunk 6 and the central office line trunk 7 for calling a called party are connected. When the called party answers, the calling party and the called party are connected through the central office trunks 6 and 7.

As described above, according to this embodiment, both the calling party and the called party are connected by central office line origination connection control from the PBX side, and as is clear from the above explanation, the recovery of both parties is possible. can be monitored by PBX.

〔Effect of the invention〕

According to the present invention, if the so-called DISA function, in which a PBX is accessed from a public network through a local call and a call is made to a called party outside the city via the PBX, is approved in Japan, a function to call back the caller is provided. Since it is added to the PBX, it is possible for both the calling party and the called party to communicate from the PBX's point of view through an outgoing connection, which has the effect of preventing the line from becoming unrecoverable even if the called party disconnects from the receiver. .

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the procedure of a central office line terminating connection system according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of a PBX implementing the central office line terminating connection system according to an embodiment of the present invention. 1...Central processing unit 2...Main storage device 3...
・PB receiver 4...Call path network 5・
・・DI8 recipient reception line Office line trunk 6・Caller call back office line trunk 7・Called party call back office line trunk 11 Concave

Claims (1)

[Claims] 1. In a private branch exchange that accommodates a central office line capable of additional dialing, when a call is received from the central office line, the calling subscriber's identification information issued by additional dialing is received and stored, and the received identification information is verified. Once the calling subscriber is prompted to recover, an automatic callback signal is sent to the calling subscriber, and when the calling subscriber answers, the called subscriber number dialed by the calling subscriber is sent as a PB signal. A central office line terminating connection system characterized by receiving a call, calling a called subscriber, and connecting the calling subscriber and the called subscriber by central office line originating connection control from a private branch exchange.