JPS62291294A - Dial-in service control system - Google Patents

Abstract

PURPOSE:To eliminate the installation of a subscriber line by every subscriber, by providing an extension subscriber number sending trunk, sending an incoming subscriber number to a PBX, and connecting a call directly to an extension subscriber. CONSTITUTION:By dialing the dial number of a shared subscriber A by a subscriber B, a marker 24 connects a PBX two-way trunk 27 through its own station trunk 22. An incoming call translation controller 25a accumulates the dial number, and extracts a dial-in number corresponding to a trunk number, and sends it to a PBX extension signal sending trunk 28, and a two-way trunk 12 in a PBX10 is started up, then the number of the subscriber A is sent out. The PBX10 sends a calling tone to the extension subscriber A, and the subscriber A is connected to the subscriber B.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention provides a direct connection to an extension subscriber of a PBX via a subscriber line to a PBX (private branch exchange). This relates to a dial-in service control method.

(Prior Art) Fig. 2 shows a connection configuration between a conventional PBX and a local subscriber line (LS) exchange.
1 is P[3X10 main link (N W >), 12 is bidirectional trunk (BWT), 20 is LS switch, 21 is LS
The main link of the exchange 20 <NW), 22 is the intra-office trunk (IOT), 23 is the human trunk (IcT), 24 is the marker (control 211 setting: M), 25 is the incoming translation charge'a device N
(ENG), 26L; is the subscriber terminal, 30 is the subscriber terminal?
Line j, △, and B are subscribers.

Subscriber B of LS switch 20 is extension subscriber A of PBXlo.
When receiving a call, subscriber B dials the main number P13X10. The dial number is sent to the incoming call translation device 25 via a call register and marker 24 (not shown), and is identified as an incoming call to PBXlo,
Subscriber B is connected to a subscriber terminal 26 accommodating a PBX via a main link 21 and an intra-office trunk 22.

On the PBX 10 side, the incoming call is sent to the subscriber terminal 26.
bidirectional trunk 12 connected via subscriber 830 to
This is detected and displayed on a reception desk (not shown). Thereafter, when the operator responds, he hears from subscriber B the extension number to be connected, that is, the extension number of subscriber A, and the operator operates the main link 11 to connect to subscriber A.

(Problems to be Solved by the Invention) In the conventional connection configuration described above, when implementing a dial-in service to a PBXlo, the main link 21 of the LS switch 20
Subscriber terminals and subscriber circuits (not shown) for the number of X extension subscribers are required, and the same number of subscriber lines 30 are required.
．． This requires a P8X10 main link 11 terminal and a bidirectional trunk 12, which is extremely uneconomical.

SUMMARY OF THE INVENTION An object of the present invention is to provide a system that eliminates the above-mentioned problems and provides a dial-in service for many extension subscribers using fewer circuits and fewer subscriber lines.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a dial-in service control method in which calls are directly received and connected to extension subscribers of the PBX via a subscriber line to the PBX. P to the incoming translation 1b control device of the connected central line exchange
A subscriber memory and a trunk-compatible memory for connecting the BX internal line width signal are provided, and a bidirectional trunk for the PBX is provided between the subscriber terminal of the main link of the central office subscriber line exchange and the PBX, and a bidirectional trunk signal for the PBX is opened. PB between control devices
A trunk for sending an X extension number is provided, and the PBX directly connects the subscriber line to the extension subscriber corresponding to the extension number.

(Function) According to the present invention, when an external subscriber dials the extension number of the PBX, it is detected from the subscriber memory that the call is for the extension of the PBX. Further, the extension subscriber number is sent to the PBX from the extension number sending trunk to the PBX bidirectional trunk, and the external subscriber and the extension subscriber of the PBX are connected.

(Embodiment) FIG. 1 is a connection configuration diagram showing an embodiment of the method of the present invention. In the figure, the same components as in the conventional example are denoted by the same symbols.

That is, 10 is the main link of PBXlo (N
W), 12 is bidirectional trunk (BWT), 20a is L
S exchange, 21 is the main link (NW) of LS exchange 120
, 22 is the internal trunk (IOT), 23 is the incoming trunk (ICT), 24 is the marker (M), 25a is the incoming translation control device (ENG), 26 is the subscriber terminal, and 27 is the PBX.
28 is a PBX extension number sending trunk (PB-O20), 30 is a subscriber line,
A and B are subscribers.

FIG. 3 shows the configuration of the main parts of the incoming translation control device 25a, the PBX bidirectional trunk 2, and the PBX extension number sending trunk 28.

The incoming translation control device 25a includes a υ control circuit 251. It has a subscriber memory 252 and a trunk corresponding memory 253;
The extension number of the PBX dial-in service subscriber is registered in the subscriber memory 252, and the trunk correspondence memory 253 is registered with the PBX bidirectional trunk 2 link 21.
The storage location information and trunk number above are registered. - PBX bidirectional trunk 2 A contact point for sending a subscriber number is provided to a well-known bidirectional trunk, and the communication path monitoring unit 271. Ringing tone sending section 272, control section 213. Relay RL and its contacts r111, ri
12, and the contacts r11. rf2 is 2 of the joining sound line 30
Each is connected to a book line.

In addition, although only one bidirectional rank 27 for PBX is shown in the drawing, two to several ranks are normally provided.

The P[3X extension number sending trunk 28 includes a subscriber number generation circuit 281 that generates a PBX extension number using, for example, a multifrequency signal, and a supervisory control section 282.

The operation during dial-in service for direct connection from subscriber B to extension subscriber A will be described below.

When the subscribing fiB dials the dial number (station number+extension number) of the shared subscriber A, the LS exchange 20a activates the incoming translation control device 25a with the marker 24, as is known in the art. Incoming call translation 411 m device 25 a c. The dialed number is checked against the subscriber memory 252 via the control circuit 251, and if it is a dial-in service incoming call to an extension subscriber of the PBXIO, an empty selected two-way trunk for the PBX is selected. The second frame position information is transferred to the marker 24.

The marker 24 drives the main link 21 to store the dialed number for the subscriber B-own trunk 22-PBX in the empty selected bidirectional trunk 2 for PBX in the trunk correspondence memory 253.

In case the extension is not subscribed to the dial-in service or there is an empty two-way trunk for PBX, etc., the incoming translation control device 25a instructs the marker 24 to perform disconnection processing, for example, to send a busy tone. Let's do it.

Two-way trunk for PBX, communication path monitoring section 271
detects the connection and notifies the control unit 273 of this.

a, +11111 section 273 c. Notify this to the monitoring control section 282 of the trunk 28 for sending PB
Activate the trunk 28 for sending the BX extension number. The monitoring control unit 282 further notifies the control circuit 251 of the incoming translation control device 25a, and starts the incoming translation control device 25a.

In the incoming translation control device 25a, the control circuit 251:
The dial-in number stored in the trunk correspondence memory 253 at a position corresponding to the trunk number of the bidirectional trunk for PBX, that is, the subscriber number of the subscribed fiA, is extracted and is sent to the subscriber number generation circuit of the PBX extension signal sending trunk 28. 281 and restore it.

Upon receiving the subscriber number, the supervisory control unit 282
Operate relay RL @, switch contacts r11 and r12, connect subscriber line 30 and subscriber number generation circuit 281,
Activate the bidirectional trunk 12 of BXlo, and subscriber A's subscriber? Send R@ as a multi-frequency signal.

When the PBXlo receives the subscriber number, it connects the bidirectional trunk 12 to the main link 11 to the extension subscriber using a control circuit (not shown). This connection is detected by the PBX bidirectional trunk 270 call path monitoring section 271 through the bidirectional trunk 12, for example, and the ringing tone sending section 272 is activated via the control section 273 to send a ringing tone to the extension subscriber A.

Thereafter, when extension subscriber A picks up the handset, it becomes possible to talk to subscriber B on the calling side.

Note that even in the Daicel-in service from a subscriber external to the LS exchange 120a, connection is possible via the incoming trunk 23 of the LS exchange 1120a, in the same way as the connection via the trunk 22 within the own office.

(Effects of the Invention) As explained above, according to the present invention, a bidirectional trunk for PBX and a trunk for sending subscriber extension numbers are provided between the subscriber terminal of the main link in the LS exchange and the PBX,
Since the incoming subscriber number is sent to the PBX and a direct connection is made to the extension subscriber, there is no need to provide a subscriber line for each dial-in service subscriber as in the past, making it possible to provide an economical service. Furthermore, there are advantages such as the ability to fully automate connection control on the PBX side and save labor.

[Brief explanation of drawings]

FIG. 1 is a connection configuration diagram showing an embodiment of the dial-in service control method of the present invention, FIG. 2 is a connection configuration diagram showing a connection configuration between a conventional PBX and an LS exchange, and FIG. FIG. 2 is a configuration diagram showing details of main parts of the circuit. 10...PBX. 11...PBXlo main link,
12... Bidirectional trunk, 20a... LS switch, 21... Main link of LS switch 20, 24...
Marker, 25a... Incoming translation control device, 26... Subscriber terminal, 27... Bidirectional trunk for PBX 8...
PBX extension number transmission trunk, 30... subscriber line,
A, B...Subscribers. Patent applicant Oki Electric Industry Co., Ltd. Nippon Telegraph and Telephone Corporation

Claims (1)

[Scope of Claims] In a dial-in service control system in which calls are directly received and connected to an extension subscriber of a PBX via a subscriber line to the PBX, an incoming translation control device of a central office subscriber exchange to which the PBX is connected. A subscriber memory and a trunk corresponding memory are provided for connecting a PBX extension number, a bidirectional trunk for the PBX is provided between the subscriber terminal of the main link of the central office subscriber line exchange and the PBX, and a bidirectional trunk for the PBX and the incoming call translation are provided. A dial-in service control system characterized in that a trunk for sending a PBX extension number is provided between the control device and the PBX, and the subscriber line is directly connected to the extension subscriber corresponding to the extension number.