JPH0831914B2 - Calling / Called Number Conversion Connection Method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outgoing / incoming call number conversion connection system using virtual numbers in a switching network.

[0002]

2. Description of the Related Art Generally, in a switching network, one per line
One line number is assigned.

FIG. 3 is a system block diagram showing a first example of a conventional exchange system. In FIG.
Two terminals (TA) on line 4 (line number A)
1 and 2 are connected to a switching device 81 in a switching network 8 via a terminal multiplexing device (SWA) 3 such as a private switching system or a concentrator, and a terminal device (line number B) 6 from the switching device 81 to a terminal device ( TB) 7 is connected.

Note that a plurality of terminal devices may be directly connected to the switching device in the switching network (that is, without passing through the SWA3) by one line.

In both of these switching systems, when both TA1 and TA2 call TB7, in either case, as shown in FIG. 3 (b), the switching device 81 uses the called line number B and the calling line number. Since TB is only used to connect between TA7 and TA1 or TA2, TB7
The calling line number A cannot distinguish between the incoming call from A1 and the incoming call from TA2.

As described above, in this first example of the prior art, when a call-in terminal device receives a call from a plurality of terminal devices connected to one calling line, the call from which terminal device is received. It cannot be identified whether it is a call.

In the above conventional switching system, even when the called terminal device takes a method of identifying the communication partner by using the calling line number, the called terminal device identifies which terminal device the incoming call originates from. I cannot communicate, so I cannot communicate.

[0008] As another method for identifying which of a plurality of terminal devices connected to one line is calling, identification is made between the originating and terminating terminal devices by using information transmitted through. There is a technique.

FIG. 4 is a system block diagram showing a second example of the conventional switching system. The second example is a method of utilizing the sub-address function provided by the switching network. Here, the subaddress is a number that can be uniquely given to each terminal device by the user of the switching network.

The configuration of the exchange system shown in FIG. 4A is the same as that shown in FIG. 3, but subaddresses sa1 and sa2 are allocated to TA1 and TA2, respectively, and the exchange 91 sends the originating subaddress to the through. It has a function of transmitting to the line 6 on the calling side.

At the time of calling, TA1 and TA2 add the subaddresses sa1 and sa2 to the called number of TB7 and dial. The switching device 91 in the switching network 9 connects to the TB 7 through the called line 6 (line number B) by the called number,
The subaddresses sa1 and sa2 are sent to TB7 through.
TB7 is the subaddress sa1, which is displayed when the call is received.
It is possible to identify whether the calling terminal device is TA1 or TA2 by sa2. The destination sub-address is not used during this connection.

[0012]

In the above-mentioned first example of the prior art, when a call-in terminal device receives a call from a plurality of terminal devices connected to one calling line, which terminal device is called. It is not possible to identify whether the call is from.

In this conventional switching system, even when the called terminal device uses the calling line number to identify the communication partner, the called terminal device identifies which terminal device the incoming call came from. Therefore, there is a problem that communication cannot be performed.

Further, as seen in the second conventional example,
In the method of identifying the calling terminal using the information transmitted through between the terminal devices using the switching network, the procedure of recognizing the communication partner according to the transmitted information (for example, in the second example, the subaddress Format and the function of the switching device to directly send the sub address to the called terminal device). However, at present, there is a problem that it is difficult to uniformly perform the procedure of recognizing the communication partner among the terminal devices.

[0015]

According to the calling / called number conversion system of the present invention, in a switching network accommodating a plurality of terminal devices via one line, the switching devices constituting the switching network receive a call. When the switching device receives the virtual called number as the called number, having a correspondence table of the predetermined virtual called number of the terminal device and the predetermined virtual calling number of the calling terminal device. The virtual calling number is generated from the virtual called number, the calling number is converted into the virtual calling number, and the virtual called number is connected to the terminal device having the virtual called number.

In a switching network accommodating a plurality of terminal devices via one line, the switching devices constituting the switching network are such that a predetermined virtual called number of the terminal device to be called and the line that has called. Has a correspondence table of a predetermined calling line number of the calling terminal device and a predetermined virtual calling number of the calling terminal device, and when the switching device receives the virtual called number as the called number, The virtual calling number is generated from a call number and the calling line number, the calling number is converted from the calling line number to a virtual calling number, and the virtual calling number is connected to the terminal device of the virtual called number. And

[0017]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a system block diagram of a switching system showing a first embodiment of the present invention. In the same figure (a), two terminal devices (T
A) 1 and 2 are switching devices 51 in the switching network 5 via a terminal multiplexing device (SWA) 3 such as a private switching system or a concentrator.
Line from the switching device 51 (line number B) 6
The terminal device (TB) 7 is connected to.

In this embodiment, TA1 and TA2 are
Predetermined virtual calling numbers a1 and a2 are given, and TB7 is given predetermined virtual called numbers b1 and b2 for incoming calls from TA1 and TA2. Correspondence table of call number b1 and calling line number A and virtual calling number a1, and virtual called number b2 and calling line number A and virtual calling number a2
And a correspondence table with.

TA1 and TA2 make a call to TB7 and are connected to TB7 through SWA3, line 4 (line number A), switching device 51, and line 6 (line number B) for communication. The TB 7 identifies the communication partner by the calling line number A when receiving a call.

In the exchange system having such a configuration,
When the switching network 5 cannot allocate a plurality of line numbers to one calling line, or when TA1 and TA2 cannot send out their own line numbers (calling numbers), the switching device 51 is as follows. Calling and receiving numbers are converted using virtual numbers to realize switched connection.

TA1 dials the virtual called number b1 of TB7 to make a call. At this time, the switching device 51 accepts the calling process with the virtual called number b1 as the called number and the calling line number A as the calling number.

Here, the switching device 51 recognizes that the incoming call number (virtual incoming call number b1) is a virtual number, searches the correspondence table, and determines the incoming call number as shown in FIG. 1 (b). The virtual called number b1 is converted to the called line number B, the calling number is converted from the calling line number A to the virtual calling number a1, and then TB
7. Incoming call processing is performed for 7.

In TB7, the calling number is the virtual calling number a1.
It is possible to recognize that the incoming call is from TA1 by the display of.

In this embodiment, the correspondence table is searched to convert the called number (virtual called number b1) and the calling number (calling line number A) into the virtual calling number a1 and then TB7.
It is also possible to adopt a configuration in which an incoming call process is carried out for.

Similarly, TA2 is the virtual called number b of TB7.
Dial 2 to make a call. At this time, the exchange device 51
Accepts the calling process with the virtual called number b2 as the called number and the calling line number A as the calling number.

Here, the switching device 51 recognizes that the called number (virtual called number b2) is a virtual number, searches the correspondence table, and determines the called number as shown in FIG. 1 (b). The virtual called number b2 is converted to the called line number B, the calling number is converted from the calling line number A to the virtual calling number a2, and then TB
7. Incoming call processing is performed for 7.

In TB7, the calling number is the virtual calling number a2.
It is possible to recognize that it is an incoming call from TA2 by the display of.

In this embodiment, the correspondence table is searched to convert the called number (virtual called number b2) and the calling number (calling line number A) into the virtual calling number a2, and then TB7.
It is also possible to adopt a configuration in which an incoming call process is carried out for.

FIG. 2 is a system block diagram of a switching system showing a second embodiment of the present invention. In the figure (a), the same components as those of the first embodiment are designated by the same reference numerals as those of the first embodiment shown in FIG.

That is, the configuration of the switching system of the second embodiment is the same as that of the switching network 5 and line 4 shown in FIG. 1 (a).
The switching network 8 is connected to (line number A). The switching network 8 is a switching network in which a plurality of circuit numbers cannot be assigned to one circuit, and is the same as the switching network 8 in the conventional switching system shown in FIG. 3 (a).

The operation of this embodiment is similar to that of the first embodiment. Referring to FIG. 2B, TA (virtual calling number a
1) 1 dials a virtual called number b1 of TB7 to make a call. The switching device 81 of the switching network 8 passes the received virtual incoming call number b1 and the calling line number A through to the switching network 5 through.
Therefore, at the time of calling from this TA1, the switching device 5
The called number received by 1 is the virtual called number b1 and the calling number is the calling line number A.

When TA2 calls TB7,
Since the virtual called number b2 is dialed, the switching device 51 similarly receives the virtual called number b2 as the called number and the calling line number A as the calling number.

In any case, the switching device 51 recognizes that the incoming call number is a virtual incoming call number, searches the correspondence table, converts the incoming call numbers b1 and b2 into the incoming call line number B, and outputs the call. The calling line number A of the call number is set to the virtual calling numbers a1 and a2, respectively.
Then, the incoming call processing to TB7 is performed.

In TB7, the calling number is the virtual calling number a.
It is possible to recognize that the incoming calls are from TA1 and TA2, respectively, from the displays of 1, a2.

Further, in this embodiment, the correspondence table is searched to convert the called number (virtual called number b1) and the calling number (calling line number A) into the virtual calling number a1 and then TB7.
It is also possible to adopt a configuration in which an incoming call process is carried out for. Similarly, after converting the called number (virtual called number b2) and the calling number (calling line number A) to the virtual calling number a2,
It is also possible to adopt a configuration in which the incoming call processing is performed on the TB 7.

Although TA1 and TA2 are illustrated as the calling terminal devices in the first and second embodiments, it is clear that the number of calling terminal devices is not limited to two.

[0038]

As described above, according to the present invention, when the switching device in the switching network receives the virtual called number as the called number, the received virtual called number or the virtual called number and the calling line are used. By converting the calling number to a virtual calling number from the number, it is possible to display which of the plurality of calling terminal devices that cannot be identified by the calling line number alone. It has an effect that it can be identified by the generated virtual calling number.

[Brief description of drawings]

FIG. 1 is a system block diagram of a switching system showing a first embodiment of the present invention.

FIG. 2 is a system block diagram of a switching system showing a second embodiment of the present invention.

FIG. 3 is a system block diagram showing a first example of a conventional exchange system.

FIG. 4 is a system block diagram showing a second example of a conventional exchange system.

[Explanation of symbols]

 1, 2 Calling terminal device (TA) 3 Terminal multiplexing device (SWA) 4, 6 Lines (line numbers A, B) 5, 8, 9 Switching network 7 Called terminal device (TB) 51, 81, 91 Switching device a1 Virtual calling number for TA1 a2 Virtual calling number for TA2 b1 Virtual called number for TA1 b2 Virtual called number for TA2 subaddress for sa1 TA1 sa2 Subaddress for TA2

Claims (2)

[Claims] 1. In a switching network accommodating a plurality of terminal devices through one line, the switching devices constituting the switching network have a pair of a calling terminal device and a called terminal device .
Correspondence table between the virtual called number and the virtual calling number
Have a, said switching device, a virtual incoming call number as the called number
Is received , the virtual calling number corresponding to this virtual called number
Generate a call and convert the calling line number to this virtual calling number.
Then, a calling / calling number conversion connection method characterized by connecting to a terminal device corresponding to the virtual called number . 2. A switching network accommodating a plurality of terminal devices through a single line, switching device constituting the switching network, the set of the calling terminal device and the calling line number and an incoming call terminal
For each, a predetermined virtual called number and line
Has a correspondence table of the call number and virtual call number, said switching device
Calls the virtual called number as the called number as the called number
When receiving a line number, the virtual incoming call number and before Kihatsuko
Generate a corresponding virtual calling number from the line number and call this
It converts the call line number to a virtual call this number, this virtual onset
An outgoing / incoming call number conversion connection method characterized by connecting to a terminal device corresponding to a call number .