JPH04290352A - Communication control system for specified terminal - Google Patents

Abstract

PURPOSE:To realize communication with the specified terminal connecting INS terminals on multi-points without influence on INS specifications. CONSTITUTION:A privacy code register means 26 registering privacy codes for each terminal, an originating means 18 transmitting the privacy code of the terminal 10 to be connected with the calling set signal, a response means 16 returning response signals when receiving calling set signals sent from the originating call signal 18, a comparison means 22 comparing the privacy bar code in the calling set signal sent from the originating call means 18 with that for each terminal, and a reception means 24 receiving the only response from the terminal 10 equipped with the same privacy code with that from the originating call means 18 based on the comparison result of the comparison means 22, are provided.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is directed to an ISD in a PBX.
The present invention relates to a call control method that provides a service for communicating with a specific terminal on a multipoint network as one of the additional services using N terminals.

0002

2. Description of the Related Art ISDN, which has developed in recent years, has a basic interface with a multi-point configuration, and up to eight terminals can be connected to this interface.

[0003] In ISDN, CCI is used as a means for communicating with specific terminals in a multipoint configuration.
As defined in the TT Recommendation, there are so-called dial-in methods and called subaddress methods.

[0004] As shown in FIG. 11, the dial-in method uses multiple terminals 3 connected to the network at multiple points.
In this method, a different called number is assigned to each of the two terminals, and when communicating with a specific terminal among them, the called number of the specific terminal is designated and only the specific terminal is called.

[0005] On the other hand, the destination subaddress method is shown in FIG.
As shown in 2, after a common called number is given to a plurality of terminals 34 that are multi-point connected to the network, a different called sub-address is assigned to each terminal, and communication is performed with a specific terminal among them. In this case, in addition to the called party number of that specific terminal, the called party subaddress is specified to call only the specific terminal.

[0006]

[Problem to be solved by the invention] However, the current ISD
In the N specification, unless all terminals on a multipoint are in step and set their own terminal numbers or subaddresses, the network will respond to the first response ( CONN
ECT) The terminal that sent back the message is selected and communication with the specified user is not necessarily possible.

[0007] In other words, according to the ISDN specifications, all terminals on a multipoint must have a called number or subaddress set, and if a certain terminal (a) has not set its own called number or subaddress. If not, for a call to another terminal (b), said terminal (a)
It also becomes possible to respond. Moreover, if one terminal (a) responds before another terminal (b), the network selects the terminal that responded first, so the terminal (a) that responded first will be connected. It will be done. As a result, the caller may not necessarily be able to communicate with the desired terminal.

[0008] An object of the present invention is to realize communication between an ISDN specification terminal and a specific terminal connected on a multipoint network without affecting existing terminal specifications.

[0009]

[Means for Solving the Problems] FIG. 1 shows a diagram of the principle of the present invention. The present invention provides a user interface to which a plurality of terminals 10 can be connected.
ISDN private branch exchange 1 that accommodates network interfaces
This is realized in a communication network equipped with 2.

The present invention includes a privacy code registration means 26 for registering a privacy code unique to each terminal, and a transmission means 1 for transmitting the privacy code of the terminal 10 to which a caller wishes to connect in a call setup (SETUP) message.
8 and the call setup (SETU) sent from the private branch exchange 12.
P) Response means 1 that returns a response when receiving a message
6, a comparing means 22 that compares the privacy code in the call setting signal transmitted from the transmitting means 18 and a privacy code unique to each terminal, and the comparison result by the comparing means 22 indicates that the privacy code is the same as the privacy code from the transmitting means 18. The receiving means 24 accepts only responses from the terminal 10 having the privacy code.

[0011]

[Operation] FIG. 1 shows the principle of operation of the present invention. Here, the above-mentioned "signal" and the following "message" have the same meaning.

First, the caller is provided with information representing a request for a specific terminal 10 on the multipoint call setup (SETUP) shown in FIG.
) Set request + privacy code in the user-user information element in the message, and when the network receives this information, broadcast-style call setup (SETUP) on the multipoint
When sending a message, the user information elements from the sender are set as they are.

Further, the specific destination terminal 10 in question determines a privacy code in advance with the caller and registers it in the privacy code registration means 26. This privacy code registration means 26 may be provided in the terminal 10 or in the exchange 12.

[0014] The privacy code registration means 26 is
0, contains the user-to-user information element from the network containing the privacy call request (SE
When receiving the TUP) message, the specific terminal 10 sends the first response message to the network, for example, the paging (A TUP) message shown in FIG.
LERTING) Includes a user-user information element with a privacy code set in the message.

[0015] When a request for communication with a specific terminal 10 on a multipoint is received from a caller, a privacy code from the caller is stored in the private branch exchange 12. When responses are received from multiple terminals 10 on the destination interface, only responses containing a privacy code from the terminals 10 that are equal to the privacy code from the caller set in the private branch exchange 12 are accepted by comparison in the comparing means 22. By doing so, other calls are rejected and communication with the designated terminal 10 becomes possible.

By the way, "response" as used in the present invention refers to a call setup reception (C
ALL PROEEDING), response (CONNEC
It is a broad concept that includes T) or ALERTING.

When the privacy code registration means 26 is provided in the exchange 12, the privacy code registration means 26 registers each terminal-specific privacy code corresponding to the terminal accommodation position.

When receiving a request for communication with the specific terminal 10 on the multipoint from a caller, the means compares the privacy code from the caller with the privacy code registered in the privacy code registration means 26 of the private branch exchange 12. 22, and determine which terminals 10 are compatible with the same privacy code.

[0019] When responses are received from multiple terminals 10 on the destination interface, other calls are rejected by accepting only responses from terminals 10 that are equal to the privacy code from the caller, and communication with the designated terminal 10 is interrupted. becomes possible.

As described above, in the present invention, the privacy code of the specific terminal 10 with which the caller wishes to communicate is set in the call setting (S
When the private branch exchange 12 sends the call setup (SETUP) message to multiple terminals 10 all at once, this
UP) Each terminal 10 that has received the message returns a response signal, and the comparing means 22 compares the privacy code specified by the sender with the privacy code unique to each terminal, and based on the comparison result, the message from the sending means 18 is Terminal 10 having the same privacy code as the privacy code
The call is connected by accepting only the response.

[0021] In the present invention, a privacy call determining means 30 is provided which determines whether or not it is a call setting request (privacy call) specifying a specific terminal 10 based on information from the caller. It is also possible to perform normal call processing without processing incoming calls to the specific terminal 10 (additional function 1).

[0022] Here, CCITT Recommendation Q. It is possible to determine whether or not it is a privacy call by recognizing the privacy code from the user/user information element in the G.931 message.

[0023] Furthermore, a plurality of terminals 10 on a multipoint
It is also possible to provide notification means for notifying that it is a privacy call (additional function 2). In this notification means, it is also possible to notify the user and the user information from the caller by setting the user/user information elements as they are in the broadcast format call setup message on the destination interface.

Furthermore, in the present invention, the receiving means 24 does not perform normal call reception control on the multipoint, but receives CCITT recommendations from the called user on the multipoint.
Q. The user-user information element in the first response message of 931 makes it possible to accept only a response from a specific terminal 10 (additional function 3).

[0025] This reception means 24 compares the privacy code included only by the specific terminal 10 with the privacy code of the sender, and only the terminals 10 that match respond, but if a code other than the privacy code included by the specific terminal 10 or A response from the terminal 10 that does not contain anything is rejected even if it is the first response (additional function 4)
.

Furthermore, it is also possible to provide a call control means having a function of notifying that a communication state has been established with a specific user (additional function 5).

[0027]

Embodiment The embodiment shown in FIG. 2 is an example in which the privacy code registration means 26 is provided in each of a plurality of terminals 10.

In FIG. 2, a plurality of extension terminals 10 are connected to an ISDN private branch exchange 12 via a user/network interface.
is connected.

Each extension terminal 10 has a privacy code registration means 26 for registering a terminal-specific privacy code.
and call setup (SETUP) sent from the private branch exchange 12.
) response means 16 for returning a response when a message is received.

[0030] Furthermore, the caller terminal 14 is provided with the privacy code of the terminal 10 to which the caller wishes to connect in a call setting (SET).
UP) A transmitting means 18 for transmitting the message along with the message is provided.

Furthermore, the central processing unit 20 of the private branch exchange 12
There is a privacy call determination means 30 for determining whether or not it is a privacy call, and a comparison means 22 for comparing the privacy code in the call setup (SETUP) message transmitted from the transmission means 18 with the privacy code unique to each terminal. According to the comparison result by the comparison means 22, the reception means 24 receives only responses from the terminal 10 having the same privacy code as the privacy code from the transmission means 18.

An example of the operation of this embodiment will be described below with reference to the sequence diagram shown in FIG. Here, four destination terminals are installed, and a privacy code is determined for each terminal and registered in the privacy code registration means 26.

First, in order to communicate with a specific terminal (terminal #2 in this case), the caller performs call setup (S) as shown in FIG.
ETUP) Include the specified terminal communication request + privacy code in the user/user information element in the message.

The private branch exchange 12 that receives the call setup (SETUP) message stores the privacy code in the storage unit 28 and also includes the user-user information from the caller terminal 14 user in the call setup (SETUP) message to the called party. A call setup (SETUP) message is sent to all terminals 10 in broadcast format, including information elements.

Each terminal 10 in which a privacy code is stored sets a user-to-user information element containing its own privacy code in the first response message to the private branch exchange 12, and sends it back.

[0036] Upon receiving the response from each terminal 10, the private branch exchange 12 compares the privacy code from the caller stored in the storage unit 28 with the privacy code from each terminal 10 using the comparing means 22. Here, since the privacy code in the response (CONNECT) message of terminal #1 is different from the privacy code given by the caller, the call of terminal #1 is released. Also, the privacy codes in the ALERTING messages of terminals #3 and #4 are different from the privacy codes given by the callers, so
The calls of terminals #3 and #4 are released.

[0037] Calling from terminal #2 (ALERTING)
Since the privacy code in the message is the same as the caller's privacy code, it is not rejected and the call is routed through switch 12 to caller terminal 14. Following this call, a response is made, and the privacy code in the message for these calls and responses is also compared by the comparing means 22 with the privacy code given by the caller. Since the comparison result is “same”, confirm the response (CONNEC
T ACKNOWLEDGE) is transmitted, a call is established between the caller terminal 14 and terminal #2, and a communication state is established. Note that a call disconnection release message is sent to other terminals.

In this way, the reception means 24 that receives the comparison result from the comparison means 22 only accepts responses from terminals 10 with the same privacy code, and does not establish a call even if another terminal 10 responds first. Reject the call to prevent

[0039] In the incoming call processing at the time of multi-point, normally,
The terminal 10 that responds first is connected, but in the present invention, even if the first response received by the private branch exchange 12 does not have a privacy code in the response, or even if the code is present, the caller If the privacy code is not the same as that of the terminal 10, the response from that terminal 10 is rejected.

Next, the control of this embodiment will be explained with reference to control flowcharts shown in FIGS. 6 to 8. First, FIG. 6 shows a control flow in the case of call setting display, call setting confirmation, and call notification.

First, the case of call setting display will be explained. When there is a call setup request from the caller, the private branch exchange 12 determines whether there is a user-user information element in the call setup (SETUP) message from the caller (step 100), and uses the privacy call determining means 30 to determine whether the user-user information element is present in the call setup (SETUP) message from the caller. It is sequentially determined whether there is a request for a privacy call in the user information element, that is, whether there is a privacy code (step 101).

[0042] If there is no user/user information element, if it is not a privacy call, then in step 103 the information shown in FIG.
Existing call connection processing as shown in FIG. 8 is performed.

On the other hand, if there is a user-user information element and it is a privacy call, the privacy call mode between the caller and the other party's terminal 10 is set in step 102, and in step 103 the privacy call mode shown in FIGS. 7 and 8 is set. The processing shown in is performed.

In the above, steps 100, 101,
102 indicates the processing in the privacy call determining means 30, and the additional function 1 is realized.

[0045] When a call setup confirmation is received as a response from the terminal 10, it is determined whether or not there is a user-user information element in the signal (step 160), and
The privacy call determining means 30 determines whether or not it is a privacy call (presence or absence of a privacy code) (step 161), and if it is denied, a disconnection request is issued (step 162) and the call is released by existing call processing ( Step 163). On the other hand, if the user-user information element exists and it is determined that the call is a privacy call, the existing call is processed (step 164).

[0046] Here, the additional function 3 is realized by steps 160 to 163, among which steps 162,
At 163, the additional function 4 is realized. Also, in step 164, the privacy code in response is compared with the privacy code from the caller, and if they match, the call is connected, a communication state is established, and the terminal 10 is notified that the communication state has been established. do. In this sense, step 164 also realizes the additional function 4 and further realizes the additional function 5.

[0047] Also, as a response from the terminal 10, a call (A
LERTING), the user's
It is determined whether there is a user information element (step 17).
0), and whether or not it is a privacy call (presence or absence of a privacy code) is determined (step 171), and if these are denied, a call release request is issued (step 1).
72), released by existing call processing (step 173).
). On the other hand, if the user-to-user information element and privacy code are present, existing call processing is performed (step 174).

Here, the additional function 3 is realized through steps 170 to 173, among which steps 172,
At 173, additional function 4 is realized. In step 174, the privacy code in the calling signal is compared with the privacy code from the caller, and if they match, the call is connected after waiting for a response from the destination terminal 10, and a communication state is established.
The terminal 10 is notified that the communication state has been established. In this sense, step 164 also realizes the additional function 4, and furthermore,
Realizes additional function 5.

Next, FIG. 7 shows the processing flow on the called side in the exchange 12, in which, following a call setup request (step 130), a call setup (SETUP) message is sent in broadcast format to each terminal 10 ( Steps 131, 132).

In response, each terminal 10 sends a response (CO
NNECT) message is returned (step 133).
Alternatively, an ALERTING message is returned (step 134).

[0051] Once the CONNECT message is returned, a call setup confirmation is then issued (step 135);
When the ALERTING message is returned, an alert notification is issued (step 136).

From step 135, ■transition to response state (step 137), response (step 138), call setting confirmation (step 139), and return to step 137, ■call (step 140), call notification The process of transitioning to step 150 via (step 141), ■
Disconnection request (step 142), disconnection (step 143)
1. After the call setup completion request (step 144), a response is confirmed (step 145), and the call is connected and communication is in progress (step 146).

On the other hand, a transition is made from step 136 to a calling state (step 150), followed by ■response (step 151), call setting confirmation (step 152), and then transition to step 137, and ■disconnection request (step 150). Step 153
) issues a disconnect message (step 154);
Processing for transitioning to a disconnection notification state (step 155), (2) calling (step 156), and calling notification (step 157) is performed, and then processing for transitioning to step 150 is performed.

On the other hand, on the oscillator side 10, as shown in the processing flow of FIG.
11) After sending, it transitions to the calling state (step 112), receives a call setting acceptance request (step 113), sends a call setting acceptance (CALL PROCEEDING) message (step 114), and changes to the calling state (step 112). Step 115) receives a call request (Step 116), sends an ALERTING message (Step 117), then moves to a call notification function (Step 118), and receives a call setup response (Step 119). , and sending a response (CONNECT) message (step 120) are performed in sequence, and the communication state is entered (step 121).

[0055] Through the above-described processing flow, communication with the terminal 10 desired by the caller can be realized without affecting the existing ISDN specifications.

Next, another embodiment will be explained based on FIGS. 9 and 10. In this example, the privacy code registration means 26
This is the case when the main memory is provided with In this example, the privacy code registration means 26 registers the privacy code in a table such as the one shown in FIG. 10, which is provided in the main storage device and arranges the terminal housing position versus the privacy code in contrast.

When there is a response from the terminal 10, the comparison means 22 selects the privacy code of the caller from among the privacy codes registered in the privacy code registration means 26, instead of comparing it with the privacy code in the response signal. As a result, a terminal 10 compatible with the same privacy code is selected and a call is connected.

[0058]

[Effects of the Invention] According to the present invention, it is possible to comply with the ISDN specifications without changing the terminal side, and it is not possible to completely comply with communication with a specific terminal using the conventional dial-in function or subaddress function. Can communicate with the terminal. This allows it to be used for private or important communications.

[Brief explanation of the drawing]

[Figure 1] Shows a diagram of the principle of the present invention

[Figure 2] Components showing Example 1

[Figure 3] Diagram showing a call setup message

[Figure 4] Diagram showing response messages

[Figure 5] Call connection sequence diagram according to this embodiment

[Figure 6
] Flowchart diagram showing the control flow of the embodiment (1)

[Figure 7] Flowchart diagram (2) showing the control flow of the embodiment

[Figure 8] Flowchart diagram (3) showing the control flow of the embodiment

[Figure 9] Configuration diagram showing another embodiment

[Figure 10] Storage table of storage means

[Figure 11] Means for realizing conventional dial-in function

[Figure 12] Means for realizing conventional subaddress notification

[Figure 13] Call connection sequence diagram according to the conventional example

[Explanation of symbols]

10 Terminal 12 Private branch exchange 12 14 Caller terminal 14 16 Response means 18 Transmission means 20 Central processing unit 20 22 Comparison means 24 Reception means 26 Privacy code registration method 28 Storage part 30 Privacy call determination means 32 Terminal

Claims (3)

[Claims] Claim 1: In a communication network equipped with an ISDN private branch exchange (12) that accommodates a user/network interface to which a plurality of terminals (10) can be connected, a privacy code registration means (26) for registering a privacy code unique to each terminal is provided. ), a transmitting means (18) for transmitting the privacy code of the terminal to which the caller wishes to connect in a call setting signal; and a transmitting means (18) for transmitting a call setting signal sent from the private branch exchange (12); a response means (16) for returning, a comparison means (22) for comparing the privacy code in the call setting signal transmitted from the transmission means (18) and a privacy code unique to each terminal, and a comparison result by the comparison means (22). and a reception means (20) that accepts only a response from a terminal (10) having the same privacy code as the privacy code from the transmission means (18),
The private branch exchange (12) transmits the privacy code of the specific terminal with which the caller wishes to communicate on the call setup signal, and
10), each terminal (10) that received this call setting signal returns a response signal, and the comparison means (2)
2) compares the privacy code specified by the sender with the privacy code unique to each terminal, and based on the comparison result, the response of the terminal (10) having the same privacy code as the privacy code from the sending means (18). A communication control method for a designated terminal, which is characterized in that it only accepts calls and connects calls. [Claim 2] The privacy code registration means (2)
6) and response means (16) are provided in each terminal (10), and when the response means (16) receives a call setting signal sent from the private branch exchange (12), it responds with a terminal-specific privacy code. The comparing means (22) returns the privacy code in the call setting signal transmitted from the transmitting means (18) and the response means (16).
2. The designated terminal communication control method according to claim 1, wherein the designated terminal communication control system is configured to compare the privacy code in the response signal from the specified terminal. [Claim 3] The privacy code registration means (2)
6) is provided in the private branch exchange (12) to register a terminal-specific privacy code corresponding to each terminal, and the comparing means (22) is configured to detect the privacy code in the call setting signal transmitted from the transmitting means (18). 2. The designated terminal communication control system according to claim 1, wherein the code is configured to compare the code with a privacy code unique to each terminal registered in the privacy code registration means (26).