JPS5923696A - Subscriber connecting system of private branch exchange - Google Patents

Abstract

PURPOSE:To enable automatic receiving of private branch exchange subscribers without the aid of an operator, by providing the function to transfer PBX extension number to PBX in public network and providing the function to receive and analyze this extension number in PBX. CONSTITUTION:A subscriber A dials large private branch number and extension number. Received dial number is analyzed by CC of LS-1, received by an inter station transferring section 8, analyzed by CC of LS-2, and a path to PBX-2 is selected. Out of dial numbers received by LS-2, extension number is transmitted to the signal transmitting and receiving section 10. On receiving the extension number, CC of PBX-2 analyzes this, and calls relevant subscriber B. When the subscriber B replies to the subscriber B is connected to the subscriber's line under receiving. Thus, a communication path is completed between subscribers A and B.

Description

[Detailed Description of the Invention] (1) Technical Field of the Invention The present invention relates to control of incoming calls to a telephone or data terminal housed in a private branch exchange, and is directed to control of incoming calls from a public network. The present invention relates to a connection method for automatically receiving calls to subscribers accommodated in a private branch exchange according to their extension numbers.

(2) Conventional technology and problems In conventional telephone, data, and facsimile exchanges,
For subscribers housed in private branch exchanges (PBXs), calls must be made through an operator or by cutting to an individual subscription number, and it is impossible to receive calls to any subscriber when the operator is not present. Therefore, there were limitations on communication during emergencies.

(3) Purpose of the Invention In view of the above-mentioned conventional drawbacks, the present invention provides a service that can be easily accessed from the public network by providing a function to transfer a PBX extension number to the PBX, and a function to receive and analyze this extension number to the PBX. It is an object of the present invention to provide a subscriber connection system accommodating a private branch exchange that makes it possible to automatically receive a call to a terminal corresponding to an extension number after determining whether the receiving terminal matches the above.

(4) Structure and object of the invention According to the present invention, in a system for receiving calls from a public network to a telephone set or a data terminal housed in a private branch exchange, a means for storing a representative number and an extension number in a public network, and an extension number The constituent exchange has means for receiving the extension number and means for analyzing the extension number, and when a call is received to a subscriber within the private branch exchange, the calling party receives the "main number". + extension number", the terminating private branch exchange receives and analyzes the extension number, determines whether the terminating terminal matches the service requested by the public network, and then responds to the extension number. This is achieved by providing a subscriber connection system accommodating a private branch exchange, which is characterized by terminating calls at a receiving terminal.

(5) Examples of the invention Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a system configuration diagram showing an example of a subscriber connection system accommodating a private branch exchange according to the present invention.

In the figure, A and B are subscribers, and C and D are data terminal devices corresponding to subscribers A and B, respectively.

PBX-1, PBX-2 are private branch exchanges, JS-1, LS
-2 is a central office subscriber exchange, and CC is a control device for each exchange.

Further, 1 and 2 are subscriber lines, 3 is a trunk (A), 4 is a dial reception section, 5 is an interoffice signal transfer section (A), 6 is a trunk (B), 7 is a signal transmission/reception section (13), 8 is the inter-office transfer unit (
B), 9 indicates an operator table, and 10 indicates a signal transmitting/receiving section (C), respectively.

Subscriber A is attempting to communicate with subscriber B accommodated in PBX-2. After A makes a call, local exchange LS-1
A dials the "main number" and "extension number" of the PBX-2. In order to identify the main number and extension number, the identification numbers for both are also dialed as shown in FIG.

Further, when performing data communication, following the above-mentioned dial, an identification display and two-service class (communication speed, transmission control procedure) are dialed. An example of this dial is shown in FIG.

In Figure 2, (a) is when there is an extension number and is either a telephone or data communication, (b) is when the extension number is unknown, and (c) is when there is an extension number and is for data communication. This is an example of each dial. In this example “*”
is an identification display indicating the end of the dial type, and "#" indicates the end of the dial. Further, if there is no next dial after a few seconds after dialing "*", "*" can be used to indicate the end of the dial.

The dialed number thus received is analyzed by the CC of LS-1 and sent to the switch LS-2 which accommodates PBX-2.
Choose a route to. This dial number is transmitted from the inter-office signal transfer unit (A) 5, and is sent from the inter-office signal transfer unit (A) 5 of LS-2.
B) Received at 8, analyzed at LS-2 CC, PB
The route to X-2 is selected.

On the other hand, A extends the trunk (A) 3 of LS-1 to the trunk (B) 6 of LS-2 and the communication path to PBX-2. Among the dialed numbers received by LS-2, the extension number and ZARPIS class are sent to signal transmitter/receiver (C) 1 of PBX-2 via signal transmitter/receiver (B) 7 of LS-2.
Sent to 0. The signal transmitting/receiving unit (B) 7 displays an incoming call to the PBX-2 by, for example, starting a loop, and
-2 CC detects this, and the signal transmitting/receiving unit (C) 10
Connect to.

After connection, the signal transmitting/receiving unit (B) 7 transmits the extension number and service class using, for example, an FSK signal. Parity checks and the like are performed on these transmitted information to detect data errors. The signal transmitting/receiving unit C10 receives this signal and returns an abnormal reception confirmation signal if the signal is not received correctly. In the latter case, the signal transmitting/receiving section (B) 7 retransmits the data.

Subscriber A's call path is extended from trunk (B) 6 of LS-2 to the subscriber line to PBX-2. The subscriber lines of this call bus are first connected to the signal transmitting and receiving sections 2, 3 (B), (C)
, 10 are used to transmit and receive signals between them.

When the CC of PBX-2 receives the extension number and service class, it analyzes this and calls the corresponding subscriber B with a trunk ring tone.

If B answers (hook-off), the subscriber line that is receiving the call from B is connected. This completes the communication path between A and B.

If the extension number is not sent to the CC of PBX-2,
The CC of PBX-2 connects the call path to the operator console,
The extension number is communicated through conversation between A and the operator in the same manner as in the conventional method, and a call path is completed between A and B by the operation of the operator.

Here, a case where subscriber A attempts to perform data communication with subscriber B will be described.

The case where a person intervenes on the side of subscriber B and switches to data communication between A and B is similar to the telephone call described above.

If there is no human intervention on subscriber B's side and B's data terminal detects an incoming call (ring tone) and automatically answers,
-2 CC analyzes the service class at the same time as the extension signal, and when data communication is required, it checks whether a data terminal corresponding to subscriber B exists, and then connects to subscriber B. can. When the B-side data terminal is in a state where it can automatically receive a call, the following variations are possible.

1. As mentioned above, the CC of PBX-2 is checked for the ZARPIS class, and if there is no corresponding data terminal, the incoming call is rejected as busy.

2. A calls B without dialing the service class,
Listen to the carrier tone sent out after the data terminal detects an incoming call,
Person A switches to data communication. However, when the types of data terminals A and B are different, communication is not possible.

Depending on the type of data terminal B, some use a specific frequency instead of a ringing tone.

In this case, if the CC of PBX-2 analyzes the service class and finds that it is the terminal type, it can activate a special paging trunk and call the terminal B.

FIG. 3 shows another embodiment of the present invention, and the same reference numerals as in FIG. 2 indicate the same contents. Furthermore, 12 and 13 are inter-office signal transfer sections C.
, and an interoffice signal transfer section D.

In this case, the transmission and reception of signals between LS-2 and PBX-2 is performed using LS.
As with the case between -1 and LS-2, the inter-office signal transfer unit is used to perform this. In the case of FIG. 3, the signal transmitting/receiving section (B) 7 of FIG. 1 is unnecessary.

(6) Effects of the Invention As explained in detail above, the subscriber connection system accommodated in a private branch exchange according to the present invention allows calls to be automatically received to a subscriber accommodated in a private branch exchange or a switch without the intervention of an operator. This has great effects, such as making it easier to receive calls and make data communications at night.

[Brief explanation of drawings]

Fig. 1 is a system configuration diagram showing an example of a subscriber connection system accommodating a private branch exchange according to the present invention, and Fig. 2 is a system configuration diagram showing an example of subscriber dialing according to the present invention. , (b) shows the case where the extension signal is unknown, and (c) shows the case where the extension number is available for data communication. FIG. 3 is a system configuration diagram showing another embodiment of the present invention. In the drawing, 1 and 2 are subscriber lines, and 3 is a trunk (A).
, 4 is a dial reception section, 5 is an inter-office signal transfer section (A), 6
is a trunk (B), 7 is a signal transmission/reception unit (B), 8 is an inter-office transfer unit (B), 9 is an operator console, 10 is a signal transmission/reception unit (C), 11 is a call trunk, and 12 is an inter-office signal transfer unit. Sections B and 13 indicate inter-office signal transfer sections C, respectively.

Claims (1)

[Claims] A system for receiving calls from a public network to a telephone or data terminal housed in a private branch exchange, which has means for storing a representative number and extension number in the public network, and means for transmitting the extension number to the private branch exchange, and has means for transmitting the extension number to the private branch exchange. It has a means for receiving an extension number and a means for analyzing the extension number, and when a call is received to a subscriber within the private branch exchange, the caller dials the "representative number + extension number", and the receiving private branch exchange recognizes the corresponding number. A private branch exchange-accommodating subscriber characterized in that after receiving an extension number, it is analyzed, and after determining whether or not the receiving terminal matches the service required by the public network, the call is received at the receiving terminal corresponding to the extension number. Connection method.