JPH0222587B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an extension connection system in a private branch exchange, and in particular, to a specific extension telephone and a specific central office line, after a call is made from the telephone or a call is received to the central office line, the connection process to other equipment is not completed. This invention relates to an extension connection method in a private branch exchange in which a call path is set up. Conventionally, calls from an extension number machine connected to a private branch exchange to a central office line are generally made by "0 dialing," and incoming calls from the central office line are once connected to the operator's desk and then switched to the extension telephone. However, in order to receive the same service as a single subscriber at an exchange, users of extension telephones are required to specify a specific central office line that is connected to this private branch exchange and has an independent subscriber number. , if necessary, when a specific telephone is taken off-hook, it immediately becomes the same as if the call was made from the specified specific office line, and when a ringing signal arrives on the specified specific office line, the call is immediately made from the specified specific office line. When the telephone's ring signal rings, there is a request to immediately start a call to the central office line off-hook. For this reason, a method has been adopted in which a switch is installed for a specific telephone line and a specific central office line, and if necessary, the telephone and central office line are disconnected from the private branch exchange and the two are directly connected. There is.
On the other hand, some private branch exchanges have various functions to make extension telephones more convenient. This has resulted in inconveniences such as not being able to receive services such as transfers to other telephone extensions. It is an object of the present invention to eliminate the above-mentioned drawbacks and to provide instructions in advance from a specific extension telephone, so that calls can be made between this telephone and a specific central office line, and calls can be made from this telephone or sent to this central office line. An object of the present invention is to provide an extension connection system in a private branch exchange in which a call path is set up after a call is received without completing the connection process to other equipment. The present invention provides, as storage information stored in the central processing unit of a private branch exchange that employs a storage program control method, information indicating whether or not direct communication with a central office line is possible, and information regarding a calling extension telephone, and a trunk line of a receiving central office line. Information about circuits includes information indicating whether direct connection with an extension telephone is possible, line circuits for which direct connection is permitted, numbers of trunk circuits corresponding to this line circuit, and information indicating whether direct connection is requested. The central processing unit transmits data that rewrites the information indicating that a direct call request is being made in the line trunk number correspondence information to a telephone connected to the telephone connected to this private branch exchange. a means for transmitting rewritten data to be sent to the device; a status display means for receiving and displaying confirmation data sent from the central processing unit when the information in the direct handling request has been rewritten; and a state display means for receiving and displaying confirmation data sent from the central processing unit; The telephone set includes a calling data sending means for sending to a central processing unit, and a calling means for receiving the calling data from the central processing unit and causing a calling signal to ring, and when the display means of the telephone indicates a direct line handling state. , after this telephone makes a call or receives a call to a specific central office line, a communication route of the communication network is established between this telephone and this particular central office line without completing the connection process to other equipment. It is characterized by being Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a relay system diagram of a private branch exchange according to an embodiment of the present invention, in which digital telephones (DTEL ₁ , DTEL ₂ , DTEL ₃ ) with built-in codecs are installed in a switching network (SW) 1 configured by a time division switch. 2, 3, 4
are respectively digital line circuits (DLC ₁ , DLC ₂ ,
DLC ₃ ) are connected via 5, 6, and 7. In addition, a general push-button telephone (TEL) is also included in the communication route network 1.
8 is a line circuit (LC ₁ ) with a built-in codec 9
The operator console (CONS) 10 is connected to the line circuits (LC ₂ , LC ₃ ) which also have built-in codecs.
They are connected via 11 and 12. On the other hand, central office trunk circuits with built-in codecs (COT ₁ ,
_COT2 ) 13 and 14 are also connected to the communication line network 1 on the time division side and on the analog side to the central office line. Furthermore, an intra-office trunk circuit (IOT) 15 for intra-office calls and a register trunk circuit (REGT) 16 for receiving push-button dialing signals are also connected to the communication path network 1. Note that various line circuits, various trunk circuits other than the in-office trunk circuits, and the communication path network 1 are operated by a central processing unit (CP).
17 through a plurality of control lines, and data necessary for restoring the communication path setting is sent and received. Further, the digital telephones 2, 3, and 4 are connected to the respective digital line circuits 5, 6, and 7 by data lines in addition to voice lines. FIG. 2 is a block diagram of the digital telephone 2 and the digital line circuit 5. The input/output of the digital call signal of the CODEC 31 built into the telephone 2 is directly connected to the communication path network 1 via the line circuit 5. The input/output of analog call signals is connected to the handset (RT) 28 via a current supply circuit (BSUP) 30 and a push button dial circuit (PBDIAL) 29.
It is connected to the telephone line, and transmission and reception of telephone signals and transmission of push-button dialing signals can be performed via the telephone line. On the other hand, the switch (HS) 21, the direct handling status indicator lamp (LDIT) 22, the direct handling request telephone key (KDIT) 23
A ring signal generator (RGR) 24 is also connected to a local processing unit (LCP) 26 via an input/output control circuit (IOCONT) 25.
Necessary data is transmitted and received between the central processing unit 17 and the central processing unit 17 via a data transmission/reception circuit (DRS) 27 and an connection circuit (INF) 51 included in the digital line circuit 5. The data transmission/reception circuit 27 includes a data serial/parallel conversion circuit, and the connection circuit 51 also includes a serial/parallel conversion circuit in the transmission direction.
and the central processing unit are connected by a plurality of busbars. Figure 3 is a block diagram of the central office line trunk circuit, in which the input/output of the digital call signal of CODEC 41 is connected to the call path network 1, and the input/output of the analog call signal is connected to the 4-wire/2-wire conversion circuit (HIB). 42. The second line side of the conversion circuit 42 is connected to the A and B lines of the office line via a control circuit (AB) 43 for making and answering calls to the office line and confirming responses from the office line. Additionally, a calling signal detector (D16HZ) 44 is connected between the A line and the B line to detect a calling signal from the exchange, while the control circuit 43 and the calling signal detector 44 are connected to an input/output control circuit ( IOCONT) 45 to a local processing unit (LCP) 46. Further, the local processing unit 46 is connected to the central processing unit 17 via a bus line through a connection circuit (INF) 47, and data is sent and received. On the other hand, in the stored information stored in the central processing unit, information regarding the originating extension telephone necessary for the originating connection includes the extension telephone number, service class, etc. corresponding to the digital line circuit number, as well as the information regarding direct communication with the central office line. Contains information indicating availability. 1st
The table shows an example of information about an outgoing telephone extension, in this example the digital line circuit number 101.
and 102 are extension numbers 2001 and 2002, respectively.
This indicates that direct connection is permitted.

[Table] In addition, in the storage information stored in the central processing unit, in addition to the office line telephone number, terminal type, etc., in addition to the office line trunk circuit number, the information regarding the incoming office line trunk circuit necessary for incoming call connection is Contains information indicating whether direct communication with the telephone is possible. Table 2 shows an example of information regarding the terminating office line trunk circuit. In this example, the office line trunk circuit numbers 521 and 522 correspond to telephone numbers 1121 and 1122, respectively.
This indicates that the line is connected to the numbered office line, and that direct connection is permitted for both lines.

【table】

Claims (1)

[Claims] 1. As the memory information stored in the central processing unit of a private branch exchange using the storage program control method, information regarding the originating extension telephone includes information indicating whether direct communication with the central office line is possible, and information regarding the receiving central office line trunk circuit. Information indicating whether or not direct connection is possible with the extension telephone, the line circuit to which the telephone for which direct connection is permitted is connected, the number of the trunk circuit to which this line circuit is connected as direct connection, and the number of the trunk circuit that is requesting direct connection. and line trunk number correspondence information including information indicating that a telephone set connected to this private branch exchange sends data to the central processing unit to rewrite information indicating that direct call handling is being requested in the line trunk number correspondence information. a status display means for receiving and displaying confirmation data sent from the central processing unit when the information requested for direct handling has been rewritten; The telephone is equipped with a call data sending means and a calling means for receiving call data from a central processing unit and ringing a calling signal, and when the display means of the telephone indicates a direct call status, the telephone makes a call or An extension connection method characterized in that after a call is received to a specific office line, a communication path of a communication network is established between this telephone and this specific office line without going through the process of connecting to other equipment. .