JPH07112292B2 - Private branch exchange - Google Patents

Description

[Detailed Description of the Invention] [Outline] Regarding a private branch exchange of an ISDN / PBX connected to a dial-in office line, a receiver is a recipient even if the extension is a dial-in office line or a call is made to an ISDN public network. The purpose is to allow the recipient's terminal to call back and to make a call back to the caller's terminal without dialing from the extension's terminal, even if the call comes in from the ISDN public network terminal to the extension via the dial-in station line. ISDN connected to dial-in office line in ISDN public network
In the PBX, a table that stores the extension number of the terminal accommodated in the ISDN / PBX and the dial-in extension designation number that specifies the extension number of the terminal in association with each other, and the IS
When a call is made from the terminal accommodated in the DN / PBX to the ISDN public network, at least a part of the number for identifying the dial-in station line is replaced with the dial-in extension designated number by referring to the table. Address setting means for setting the number that has been set as the calling address of the call setting signal for the calling.

[Industrial application field]

The present invention relates to an ISDN public network, and more particularly to an ISDN / PBX private branch exchange connected to a dial-in office line.

[Conventional technology]

The ISDN terminal connected to the ISDN public network has a subaddress for identifying the terminal on the bus of each subscriber in addition to the number of each subscriber. In ISDN, a subscriber can connect a maximum of eight terminals to the bus provided to each subscriber, and the subaddress mentioned above can indicate which terminal is the terminal.

FIG. 7A is a configuration diagram of the ISDN public network, and FIGS. 7B to 7E are explanatory diagrams of the setting message. ISDN public network CO
Subscriber A and subscriber B are registered in, and subscriber lines LA and L
Terminals TE _a1 and TE _b2 are connected to B (bus of each subscriber).
Are connected. This terminal is shown in FIG.
Each subscriber line LA and LB has two units, but as described above, up to eight units can be connected. The subscriber line LA is assigned a subscriber number #A, the subscriber line LB is assigned a #B, and sub-addresses # and # for each terminal are further assigned.
Is assigned. That is, terminal TE _a1 and terminal TE _b1
However, # is assigned to the terminals TE _a2 and TE _b2 . In addition, setting message i), ii), iii), iv) (7th
(D) to (e) are signals for setting up a call, and four fields of a calling address, a calling subaddress, a called address, and a called subaddress are provided as address-related information in an ISDN setting message. There is. Then, the connection is performed by appropriately setting the target information (address) in these feeds.

For example, a case where a call is made from the terminal TE _a1 to the terminal TE _b2 will be specifically described. First, when the terminal TE _a1 calls the terminal TE _b2 , i) the call setting message (the calling address is the calling party's subscriber number #A, the calling subaddress is the terminal subaddress #, and the called address is the calling party's subscriber number #). B, the destination sub-address is the sub-address # of the destination terminal TE _b2 ) and sends it to the public line network CO. Upon receiving the above-mentioned call setup message i), the CO recognizes that the destination terminal is #B and sends the call setup message ii) of the setup message to the subscriber number #B. Corresponding to this, the terminal TE
_{Although b1} and TE _b2 receive the above message according to a predetermined procedure of ISDN, terminal TE _b2 responds because the called sub-address field is #, and this response causes terminal TE _a1 and terminal TE _a2 to respond.
TE _b2 is connected.

Here, the address information ii) received by the _terminating terminal TE _b2 has the information of the calling address and the calling sub address. The information of the calling address and the calling sub address is information about the calling terminal, and it is possible to connect the called terminal to the calling terminal in reverse by this information. That is, the received calling address is stored in the called address, the received calling subaddress is also stored in the called subaddress, and the address of the terminal is stored in the calling address and the calling subaddress (the call setup message shown in FIG. 7 (d)). ), By sending to the ISDN public network CO, the setting message iv) (FIG. 7 (e)) is sent to the subscriber line LA with the subscriber number #A, and the terminal TE _a1 responds. The connection is made.

As described above, in the connection of the ISDN public network, this calling terminal can be called by setting the calling address / calling subaddress received at the time of an incoming call to the called address / calling subaddress and sending it to the ISDN public network. That is, the return connection is possible.

In the above-mentioned ISDN public network, the terminals TE _a1 , TE _a2 ,
In addition to connecting TE _b1 and TE _b2 , ISDN / PBX can also be connected.

FIG. 8 (a) is a block diagram of the ISDN public network, and FIG. 8 (b),
(C) and (d) are setting message diagrams. FIG. 8 (a) shows a case where the terminal TE _b2 of the ISDN public network is connected to the terminal TE _a1 connected to the extension of the ISDN public network PBX. The subscriber number of the PBX is #A, the extension number of the PBX is #a, and others are the same as in the case of FIG. When the terminal TE _b2 makes a call, it sends the message of setting message v) (Fig. 8 (b)) to the ISDN public network CO. The destination address is PBX
The subscriber number #A, subaddress of a extension #a and subaddress # terminal TE _a1 of PBX, origination address / calling sub-address in the case of PSTN extension as well as # B, is #. When such a setup message joins the ISDN public network CO, the ISDN public network CO recognizes the destination address #A as in the case of the public network connection, and calls the setup message vi) (Fig. 8 (c)) to the PBX. Send to. Setting message on PBX
When vi) is added, the sub address is analyzed from the setting message and the extension number #a is extracted. And extension #
To a, a setting message vii) (Fig. 8 (d)) is sent to extension #a with #a as the destination address and # with the extension number deleted from the destination subaddress information received from the public network as the destination subaddress. To do. By sending this to the extension, the terminal TE _a1 responds (the destination sub-addresses match), and the terminal TE _b2 and the terminal TE _a1 are connected. Note that the PBX inserts the public network address number α at the beginning of the originating address received from the ISDN public network CO so that the destination terminal can send back by replacing the originating address with the originating address.

FIG. 9 (a) is a configuration diagram of ISDN / PBX, FIG. 9 (b),
(C) and (d) are setting message diagrams. FIG. 9 shows a connection (return connection) from the terminal TE _a1 to the terminal TE _b2 . First, the terminal TE _a1 sets the setting message viii).
The call setting address (Fig. 9 (b)) is set and sent to the PBX. In this case the calling address extension #a, the origination address #, destination address subscriber number #B, subaddress access numbers alpha, and the terminal TE _b2 for ISDN public network is a sub-address # terminal TE _b2.

When the above-mentioned setting message is added to the PBX, the PBX analyzes the destination address and recognizes the public network access number. Then, the call setup message ix) (FIG. 9 (c)) is edited and sent to the ISDN public network CO. At this time, the destination address is the public access number α from the destination address received on the extension.
The subscriber number #B of the terminal TE _b2 excluding the above, the address # of TE _b2 received from the extension as the destination sub-address, the calling address is the subscriber number #a of the PBX, and the calling sub-address is the PBX.
It is the extension number #a of the PBX to the calling sub address received from the.

By sending the above-mentioned signal to the ISDN public network CO, the terminal TE _b2 responds to this call in the same manner as the public network connection shown in FIG. 7, and the terminal TE _a1 and the terminal TE _b2 are connected. The connection is made.

[Problems to be Solved by the Invention]

As described above, the PBX performs the connection processing by converting the extension number and the public network number so that the return connection is possible. However, when the central line becomes a dial-in central line, and when the PBX performs the same processing as the above processing, the originating address received by the terminal of the ISDN public network becomes the pilot number of the PBX and the originating subaddress Had the problem that it could not call back because the extension number of PBX was entered. This is because the PBX determines the extension from the destination address and sends the destination subaddress as it is to the destination terminal (extension terminal) when dialing in as shown in FIGS.

According to the present invention, even if the extension is a dial-in station line, the receiver terminal can be returned by the receiver even when the call is made to the ISDN public network, and the call from the ISDN public network terminal to the extension line is received. Even in such a case, the purpose is to be able to make a call back to the caller's terminal without dialing from the extension terminal.

[Means for Solving the Problem and Its Action]

FIG. 1 is a block diagram of the principle of the present invention. In an ISDN / PBX connected to an ISDN public network and having a dial-in station line, a call is made to the dial-in station line from table 1 which stores the extension number of the ISDN / PBX and the designated dial-in extension number in association with each other. At this time, the address setting means 2 replaces the number of dial-in extension designated numbers corresponding to the outgoing extension. The outgoing subaddress to which the extension is sent is set as it is. If the dial-in extension designation number and the extension number match, the address setting means 2 replaces the number below the pilot number of the station line with the calling extension number when calling to the dial-in station line. Since the dial-in extension designation number is added to the called terminal as the calling address via the ISDN public network, the return connection from the called terminal can be made by the dial-in office line.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 2 is a flowchart of operation processing in the PBX of the present invention, and FIG. 3 is a table diagram. When an extension request is sent from an extension, each extension line is dialed in (DID: DI
RECT IN WARD DIALING) (S1). If it is not a dial-in station line, return communication via the PBX and reception for return can be performed as in the conventional case, so normal transmission processing (S2) is performed. And it ends.

Further, in the determination (S1), when it is determined that the dial-in station line is the dial-in station line (YES), first, the replacement digit is called from the transmission number (DN) from the replacement digit table. For example, if the station line is number 2000, the replacement number is 32 from the table shown in Fig. 3.
Becomes This 32 is called, then the number under the pilot number of the station line is replaced with the replacement number, and it is set as the calling address (S4).

FIG. 4 is an explanatory diagram of conversion. If the pilot number is
If it is 044 777 1111, the calling address becomes 044 777 1132 by the processing S3 and S4. Then, since the calling address is set, the other message editing S5 is performed and the call setting information is sent to the office line (S6), and the process is ended.

In the processes S3 and S4, the replacement number is read from the table, and the number below the pilot number is replaced with the replacement number to form the calling address. On the other hand, similarly, the number below the pilot number of the office line may be replaced with the extension number and set as the source address (S3 '). For example, as shown in FIG. 5, the pilot number 044 777 1111 is converted to 044 777 2000 as the calling address. The conversion process S3 'is effective when the dial-in extension designation number and the extension number match.

By making the above changes, the PBX sends the originating address generated from the dial-in station line.

FIG. 6 (a) is a configuration diagram of the ISDN / PBX in the embodiment of the present invention, and FIGS. 6 (b), (c) and (d) are setting messages. In FIG. 6 (a), when data is transmitted from the extension terminal TE _a1 in the PBX-P (PBX in the embodiment of the present invention) to the terminal TE _b2 connected to the public line network CO, the data is transmitted from the terminal TE _a1. #A as the address, # as the originating subaddress
, Α # B as the destination address, # as the destination subaddress
When a setting message XXi) B, that is, an address signal (FIG. 6 (b)) is applied to the PBX-P, the PBX-P executes the processing shown in FIG. 2 and converts the originating address. Then, the setting message XXii is set with the source address #Aa, the source sub address as #, the destination address as #B, and the destination sub address as #).
(Fig. 6 (c)) is sent to the ISDN public network CO. With this setting message, the ISDN public network CO detects and analyzes the destination address, and the setting message XXiii) (FIG. 6 (d)) #Aa is sent to the terminal connected to the subscriber line #B.
Add #, #B, # to the terminal TE _b2 .

In the terminal TE _b2 , ISDN / PBX is used as the source address #Aa.
Since the information for determining the extension number in the above is included, when making a return call, it is possible to return from this number to the terminal which similarly made a call via the ISDN public network, and, for example, send reply data or the like. That is, the terminal TE _b2 is _#B , #
Therefore, the source address is transmitted as #B, the source sub address is #, the destination address is #Aa, and the destination sub address is #. Then add it to the PBX-P from the ISDN public network CO. Similarly, the PBX-P performs the reverse process of the conversion process shown in FIG. 2 and adds it to the terminal. For example, if the _calling terminal shown in FIG. 6 is TE _a1 , the setting message after conversion to TE _a1 (the calling address is α # B, the calling subaddress is #, the called address is #a, the called subaddress is #) Added.

With the above operation, the call can be sent back from the extension terminal when the call is sent back from the extension terminal or the ISDN public network terminal is sent to the dial-in station line.

In addition, in the case of a PBX that accommodates both the DID station line and the general station line,
It is also possible to consider an application in which a call from a DID target extension is preferentially called from a DID station line, and a call from a DID non-target extension is preferentially called from a general station line.

〔The invention's effect〕

As described above, according to the present invention, the dial-in station line
Even in PBX, it is possible to make back-and-forth calls without performing dial operations, as in the case of conventional extensions.

[Brief description of drawings]

FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a process flowchart of an embodiment of the present invention, FIG. 3 is a table chart, FIGS. 4 and 5 are conversion explanatory diagrams, and FIG. 6 (a). Is an ISDN-PB used in one embodiment of the present invention.
X configuration diagram, (b) to (d) of FIG. 7, configuration message, FIG. 7 (a) of ISDN public network configuration diagram, (b) to (e), and (b) of FIG. 8 (D), FIGS. 9 (b) to (d), FIGS. 10 (b) to (d), and FIG. 11 (b).
(D) is a conventional setting message diagram, and FIGS. 8 (a), 9 (a), 10 (a), and 11 (a) are configuration diagrams of a conventional ISDN / PBX. 1 ... table, 2 ... address setting means.

Claims (2)

[Claims] 1. In an ISDN / PBX connected to a dial-in station line in an ISDN public network, an extension number of a terminal accommodated in the ISDN / PBX and a dial-in extension designation number for designating the extension number of the terminal And a table for storing the dial-in station line at least when the terminal accommodated in the ISDN / PBX makes a call to the ISDN public network. A private branch exchange comprising: address setting means for setting a number obtained by replacing a part of the dial-in extension with a designated number as a calling address of a call setting signal for the calling. 2. An ISDN / PBX connected to a dial-in office line in an ISDN public network, wherein when a terminal accommodated in the ISDN / PBX makes a call to the ISDN public network, the dial-in office line Is provided with a means for setting a number obtained by replacing at least a part of the number for identifying the call with the extension number of the terminal accommodated in the ISDN / PBX as the calling address of the call setting signal for the calling. Private branch exchange.