JPH02192395A - Direct inward dialing trunk line originating system - Google Patents

Abstract

PURPOSE:To attain a turnback originating call even in the PBX of a direct inward dialing trunk line by executing the turnback connection of an ISDN-PBX to a call originating terminal without operating a dial from an incoming terminal. CONSTITUTION:When a call is originated from a table 1, which is connected to an ISDN public network, having direct inward dialing trunk line and stores the extension number ob the ISDN-PBX and the extension designated number of direct inward dialing under a corresponding state, to the direct inward dialing trunk line, an address setting means 2 replaces a current extension designated number to another extension designated number of the direct inward dialing corresponding to a call originating extension. Further, a call originating sub address sent to the call originating extension is set as it is. Further, when the extension designated number of the direct inward dialing coincides with the extension number, the means 2 replaces the lower number of the pilot number of the trunk line with the call originating extension number when calling is executed for the direct inward dialing trunk line. As a call originating address, the extension designated number of the direct inward dialing is applied through the ISDN public network to the incoming terminal, and the turnback connection from the incoming terminal can be executed with the direct inward dialing trunk line.

Description

[Detailed Description of the Invention] [Summary] Regarding the ISDN/PBX dial-in central office line originating method connected to the dial-in central office line, even if the extension is a dial-in central office line, a call to the l5DN public network cannot be made. Even if the receiver's terminal is able to call back the call, even if a call is received from an l5DN public network terminal to the extension using a dial-in office line, the receiver can call back to the caller's terminal without dialing from the extension's terminal. In an ISDN/PBX connected to a dial-in office line in an ISDN public network, a table for storing the extension number of the ISDN/PBX and a designated dial-in extension number in correspondence, and a dial-in When making a call to a central office line, address setting means is provided which refers to the table and replaces at least the lower digits of the number with at least a part of the designated extension number for dial-in corresponding to the calling extension number, and dials from the receiving terminal. The l5DN/PB without any operation
Configure it to connect back to the originating terminal of X.

[Industrial application field]

The present invention relates to an I5DN public network, and more particularly to a dial-in central office line transmission system for an I5DN-PBX connected to a dial-in central office line.

[Conventional technology]

In addition to each subscriber's number, the I5DN terminal connected to the I5DN public network has a subaddress that identifies each subscriber's terminal on the bus. l5DN allows subscribers to connect up to eight terminals to the bus provided to each subscriber,
You can specify which terminal it is by using the subaddress mentioned above.

Figure 7(a) is a configuration diagram of the l5DN public network, Figure 7(b)
7(e) are explanatory diagrams of setting messages. l5DN
Subscribers A and B are registered in the public 'fAco, and terminals TE and I, and terminals T E b z are connected to subscriber lines LA and LB (buses of each subscriber), respectively. In FIG. 7(a), this terminal is connected to each subscriber line LA.
, and LB, but up to eight units can be connected as described above.

Subscriber number #A is on subscriber line LA, and # is on subscriber line LB.
B is assigned, and subaddresses #■ and #■ are also assigned to each terminal. That is, terminal T E
1. #■ is on terminal TEb+, and terminal TE, 2. terminal T
#■ is assigned to Ebz.

In addition, setting messages i), ii), 1ii
), 1v) (Fig. 7 (d) to (e)) are signals for setting up a call, and the address-related information in the I5DN setting message includes the calling address, calling subaddress, called address, and called subaddress. Four fields are provided. Connection is established by appropriately setting target information (address) in these feeds.

For example, a case where a call is made from the terminal TE1 to the terminal TEbz will be specifically explained. First, when the terminal TE-r calls the terminal TEbz, it sends the call setup message i) (the calling address is the caller's subscriber number #A, the calling subaddress is the terminal's subaddress #■, and the called address is the subscriber number of the destination terminal). The terminal number #B and the destination subaddress are the subaddress #■ of the destination terminal TEbz) are set and sent to the public line M4co. By receiving the above call setup message i), the CO recognizes that the called terminal is #B, and sends the call setup message in setup message ii) to the subscriber number #B.
Send to. Correspondingly, the terminals T E b r, T
E b 2 receives the above message according to the prescribed procedure of l5DN, but the destination subaddress field is #■
Therefore, the terminal TEbz responds, and this response causes the terminal T
A connection is established between E-t and terminal T E-z.

Address information received by the destination terminal TEbz ii)
has information on the originating address and originating subaddress. The information on the originating address and the originating subaddress is information regarding the originating terminal, and this information allows the terminating terminal to connect to the originating terminal in reverse. That is, the received originating address is stored in the destination address, the similarly received originating subaddress is stored in the destination subaddress, and the terminal address is stored in the originating address and the originating subaddress (the call setup message shown in FIG. 7(d)). , l5DN public network CO
1v) (Fig. 7(e))
is sent, the terminal TE,l responds, and the connection is established.

As mentioned above, when connecting to the 15DN public network, the calling terminal can be called by setting the calling address/calling subaddress received at the time of an incoming call to the calling address/calling subaddress and sending it to the ■SDN public network. . In other words, loopback connection is possible.

In the above-mentioned l5DN public network, the terminals TE,
In addition to connecting l, TE, 2, TEb+, and TEbz,
SDN/PBX can also be connected.

Figure 8(a) is a configuration diagram of the l5DN public network, Figure 8(b)
.

(C) and (d) are setting message diagrams. Figure 8 (
In a), from the terminal TEbz of the l5DN public network to l
Terminal TE connected to the extension of the 5DN public 1iiPBX,
This shows the case where it is connected to I. The PBX subscriber number is #A, the PBX extension number is #a1, and other details are the same as in the case of FIG. When the terminal T E b 2 makes a call, it sends a setting message V) (FIG. 8(b)) to the 15DN public network CO. The destination address is the PBX subscriber number #A2 The destination subaddress is the PBX terminal TE -
+ extension number #a and subaddress #■, and the calling address/calling subaddress is #B, as in the case of public network extensions.
#■. When such a setup message is sent to the l5DN public 1cO, the l5DN public network CO recognizes the destination address #A as in the case of a public network connection and sends the call setup message vi) (Fig. 8(C)) to the PBX. Send. P
When the above configuration message vi) is added to BX, it analyzes the subaddress from the configuration message and assigns extension number #a.
Extract. Then, for the extension number #a, send a setting message V11) (Figure 8 (d)) containing #a as the destination address and #■, which is the extension number deleted from the destination subaddress information received from the public network, as the destination subaddress. Send to extension #a. By sending this to the extension, terminals TE and I respond and the called subaddresses match), terminal TEb
+ is connected to terminals TE and I. The PBX inserts the public network address number α at the beginning of the originating address received from the 15DN public network CO so that the destination terminal can make a return call by changing the originating address to the destination address.

Figure 9(a) is a configuration diagram of ISDN/PBX, Figure 9(b)
), (C), and (d) are setting message diagrams. FIG. 9 shows the connection (return connection) from the terminal TE-+ to the terminal TEbz. First, the terminal TE-+
sets the call setup address in setup message viii) (FIG. 9(b)) and sends it to the PBX. This special address is extension number #a, the originating address is #■, and the destination address is l.
Access number α to the 5DN public network and terminal TEb
2, the subscriber number #B and the called subaddress are the subaddress #■ of the terminal TEbz.

When the configuration message described above is applied to the PBX, the PBX analyzes the destination address and recognizes the public network access number.

Then, the call setup message 1x) (FIG. 9(C)) is edited and sent to the 15DN public line CO.

This destination address is the subscriber number #B of the terminal TEbz, which is obtained by removing the public access number α from the destination address received on the extension.
, the destination subaddress is the TEbz address #■ received from the extension, and the originating address is the PBX subscriber number #a,
Further, the calling subaddress is the calling subaddress received from the PBX and the extension number #a of the PBX.

By sending the above-mentioned signal to the l5DN public network CO, the terminal T E b z responds to this call, similar to the public network connection shown in FIG. 7, and the terminal T
A connection is established between E −+ and terminal TEbz.

[Problem to be solved by the invention]

As described above, the PBX performs conversion processing between the extension line and the public network number, thereby making it possible to make a return connection. However, if the central office line becomes a dial-in central office line and the PBX performs the same process as above, the calling address that the terminal on the l5DN public network receives when receiving a call is PB
This will be the pilot number of X, and the originating subaddress will be P.
Since the call contained the BX extension number, there was a problem in that calls could not be returned. This is because Figure 10,
As shown in Figure 11, when dial-in calls are received, PB
X determines the extension from the destination address and sends the destination subaddress as is to the destination terminal (terminal of the extension).

The present invention provides for l5D even if the extension is a dial-in office line.
Even if a call is made to the N public network, the recipient terminal can call back, and even if a call is received from an L5DN public network terminal to an extension using a dial-in office line, the call can be made without dialing from the extension terminal. The purpose of this service is to be able to call back calls to other people's terminals.

[Means for Solving the Problems and Their Effects] FIG. 1 is a block diagram of the principle of the present invention. In an ISDN/PBX that is connected to the l5DN public network and has a dial-in office line, a call is made to the dial-in office line from table 1 that stores the ISDN/PBX extension number and the designated dial-in extension number in correspondence. At this time, the address setting means 2 replaces the specified dial-in extension number with the number corresponding to the outgoing line. Set the calling subaddress sent to the outgoing line as is. Further, if the dial-in extension designation number and the extension number match, the address setting means 2 replaces the numbers under the pilot number of the office line with the party extension number when making a call to the dial-in office line. Since the designated extension number for dial-in is added to the destination terminal as the originating address via the 15DN public network, a return connection from the destination terminal can be made via the dial-in office line.

〔Example〕

Hereinafter, the present invention will be explained in detail using 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 a central office line call request is made from an extension, each central office line of the extension becomes a dial-in central office line (DID).
:DIRECT IN WARD DIALING) (Sl). If the line is not a dial-in central office line, return communication and reception in response to the call back via the PBX are possible as in the past, so normal calling processing (S2) is performed. And it ends.

Further, in the determination (Sl), when it is determined that it is a dial-in station line (YES), the replacement digits are first called from the calling number (DN) from the replacement digit table. For example, if the station line is number 2000, the replacement number will be 32 from the table in FIG. 32 is called, and then the digits below the pilot number of the central office line are replaced with replacement digits and set as the originating address (S4).

FIG. 4 is an explanatory diagram of conversion. For example, if the pilot number is 044 777 1111, process S3,3
4, the originating address becomes 0447771132. Then, since the calling address has been set, other message editing is performed at S5, and call setting information is sent to the central office line (S6).
and exit.

Processing S3. In S4, the replaced digits are read out from the table, and the numbers below the pilot number are replaced with the replaced digits to form the originating address. On the other hand, similarly, the number below the pilot number of the central office line may be replaced with the party extension number and set as the originating address (83'). For example, the fifth
Pilot number 044 777 11 as shown
11 as the originating address 044 7772
Convert to 000. Note that this conversion process 33' is effective when the designated extension number for dial-in and the extension number match.

By making the above changes, the PBX sends out the calling address generated from the dial-in office line.

FIG. 6(a) shows l5DN/PB in the embodiment of the present invention.
The configuration diagram of X, Figures 6(b), (C), and (d), contain setting messages. In Fig. 6(a), PBX-P (
Extension terminal 'rE in PBX) in the embodiment of the present invention,
When data is sent to the terminal TEbz connected to the public map vAxco according to trend 1, from the terminal TE-r, the originating address is #a1, the originating subaddress is #■, the destination address is α#B, and the destination subaddress is #B. Setting message XX i) or address signal (Fig. 6(b)
) joins the PBX-P, the PBX-P
Execute the process shown in the figure to convert the originating address. Then, the originating address is $Aa, the originating subaddress is #■, and the destination address is #
Set message XX1i as B1 destination subaddress #■
) (FIG. 6(C)), and is sent to the 15DN public network CO.

Based on this setting message, the l5DN public network Co detects and analyzes the destination address, and also
Setting message XX1ii) (
Figure 6(d)) #Aa, #■, #B, #■ to the terminal TEh
Add to z.

On the terminal TEbz, IS is used as the originating address #Aa.
It contains information that determines the extension number within the DN/PBX, so when making a call back, you can also call from this number.
It is possible to return the call to the terminal that sent the call via the 5DN public network, and send out, for example, response data. That is, the terminal TEbz is #B.

#■, the originating address is #B2, the originating subaddress is #■,
The destination address is #Aa and the destination subaddress is #■. And l5DN public! 1ico and connect it to PBX-
Add to P. Similarly, in the PBX-P, the second
Perform the conversion process in the diagram in reverse and add it to the terminal. For example, if the originating terminal shown in FIG.
a, the originating subaddress is #■) is added.

By the above-described operation, it is possible to make a return call from an extension terminal, or even when a call is made from a tsDN public phone terminal to a dial-in office line.

In addition, in the case of a PBX that accommodates both DID office lines and general office lines, calls from extensions subject to DID will be prioritized from the DID office line, and calls from extensions not subject to DID will be prioritized from the general office line. An application may also be considered in which calls are made preferentially from the central office line.

〔Effect of the invention〕

As described above, according to the present invention, even in a PBX of a dial-in station line, a return call can be made without performing a dialing operation in the same manner as in the case of a conventional extension line.

[Brief explanation of the drawing]

Fig. 1 is a principle block diagram of the present invention, Fig. 2 is a processing flowchart of an embodiment of the present invention, Fig. 3 is a table diagram, Figs. 4 and 5 are conversion explanatory diagrams, Fig. 6 (a) ISDN used in one embodiment of the present invention
・PBX configuration diagram, Figures (b) to ((1) are setting messages, Figure 7 (a)
Figure 7 (b) to (e) is a configuration diagram of the ISDN public network.
, Figures 8(b) to (d), Figures 9(b) to (d),
Figures 10(b) to (d) and 11(b) to (d) are conventional setting message diagrams; Figures 8(a), 9(a), 10(a), 11
Figure (a) is a configuration diagram of a conventional ISDN/PBX. 1...Table, 2...Address setting means.

Claims (1)

[Scope of Claims] 1) In an ISDN/PBX connected to a dial-in office line in an ISDN public network, a table (1) that stores the ISDN/PBX extension number and dial-in extension designation number in correspondence. and an address setting means that refers to the table (1) and replaces at least the lower digits of the number with at least a part of the designated dial-in extension number corresponding to the calling extension number when making a call to the dial-in office line. (2), the ISDN can be accessed without dialing from the receiving terminal.
・Dial-in central office line origination method characterized by loopback connection to the originating terminal of the PBX. 2) In the ISDN/PBX connected to the dial-in station line in the ISDN public network, an address setting means is provided to replace the lower digits of the dial station line with an extension number and set it as the calling address when a call is made to the dial station line. , A dial-in central office line origination system characterized in that a connection is made back from the receiving terminal to the originating terminal of the ISDN/PBX.