JP2000253151A - Remote access recall control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To deal with a service providing request from a remote telephone set which is other than a contract telephone set in a recall service system. SOLUTION: This remote access recall control system includes a first switchboard 9, a second switchboard 10, a first control part 22, and a second control part 11. The second switchboard responds to a special number inputted from the user of a remote telephone set 1 via a first communication line 23, and establishes a second communication line 24 with the first switchboard 9. The second control part 11 determines the validity/invalidity of the offer of a recall service by referring to a subscriber table 25 based on an inputted subscriber's number and password, and allows the first control part to execute a rerouting processing. The subscriber's number and password are inputted from the remote telephone set, and transferred via the second communication line 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote access call back control system, and more particularly, to a remote access call back control system for responding to a service provision request from a device other than a service subscriber telephone, and a control method therefor.

[0002]

2. Description of the Related Art Call back services provided mainly by central office exchanges are known. The call back service process is started when a service special number is input from a contract telephone set of a call back service contract subscriber. A control device connected to the central office performs a call back service based on the history of the latest called number on the subscriber's telephone.

A known technique related to the present invention is disclosed in Japanese Unexamined Patent Publication No. Hei.
No. 162058. In this known technique, a subscriber of an automatic call-back service performs designation registration of an automatic call-back in a storage type telephone line exchange via a general telephone line from a remote subscriber station. The storage type telephone line exchange automatically calls back the designated subscriber station at a designated time at a designated time via a general telephone line.

A call return service system that can respond to a service provision request from a telephone other than a contract telephone is desired. The call destination is a telephone number received by the contract telephone. Also, when a telephone other than the contract telephone is connected to a central office (remote station) different from the central office (host station) connected to the contract telephone, the call return service is provided. A remote access call back control system is desired. Further, it is desired that the above remote access call back control system is realized in consideration of the influence on general communication traffic between exchanges. In addition, the functions of the remote access call back control system are appropriately assigned to each of the components to be deployed in a general communication system in consideration of the arrangement and operation costs. Is desired. Further, before the call return service is executed, the signal exchange between the host station and the remote station may be realized mainly by diverting a part of the signal according to the recommendation of the communication system. desired.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a call return service system which responds to a service provision request from a telephone other than a contract telephone. Another object of the present invention is to provide a telephone set other than the above-mentioned contract telephone set at a remote location connected to a central office exchange (remote office) different from the central office exchange (host station) connected to the contract telephone set. Another object of the present invention is to provide a remote access call back control system that provides the above call back service. Still another object of the present invention is to provide the above remote access call back control system in consideration of the influence on general communication traffic between exchanges. Further, another object of the present invention is to allocate the function of the remote access call back control system to each of the components to be arranged in a general communication system in consideration of the arrangement and operation costs, thereby simplifying the operation. It is to be realized as a system. Still another object of the present invention is to realize the exchange of signals between the host station and the remote station in a process of providing a service by using a message signal according to a recommendation of a communication system. Still another object of the present invention is to provide a method for providing a call back service according to the remote access call back control system.

[0006]

In order to solve the above problems, a remote access call back control system according to the present invention (see FIG. 1) comprises a first exchange (9) and a second exchange (1).
0), a first control unit (22) and a second control unit (11).

In this case, the second exchange (10) responds to the special number entered by the user of the remote telephone (1) via the first communication line (23), and the first exchange (9). A second communication line (24) is established between the second communication line and the communication line. The first communication line is established between the first exchange (9) and the second exchange (10). The user's call back service subscriber telephone set (2) is accommodated in the second exchange (10). The remote telephone (1) is accommodated in a first exchange (9).

[0008] The first control unit (22) includes a first exchange (9).
Connected to. The second control unit (11) controls the second exchange (1
0). The second control unit (11) includes a subscriber table (25). In the subscriber table (25), a plurality of pairs of subscriber numbers and passwords of call back service subscribers are registered.

[0009] The second control unit (11), based on the entered subscriber number and password, the subscriber table (2)
With reference to 5), it is determined whether or not the call back service can be provided, and the first control unit (22) performs the rerouting process. The subscriber number and the password are input from the remote telephone (1) and transferred via the second communication line (24).

Preferably, the second communication line (24) is substantially established only when prompting for and inputting a subscriber number and a password. The second control unit (11)
It is preferable to further include an incoming call history table (26).
The incoming call history table (26) stores the latest telephone number received at the call back service subscriber telephone set (2).

In this case, when the second control unit (11) determines to provide the call back service, the second control unit (11) refers to the subscriber table (25) and the incoming call history table (26) to obtain the latest telephone number. To get. The second control unit (11)
The latest telephone number obtained via the first communication line (23) is transmitted to the first exchange (9).

It is preferable that the first control section (9) responds to the latest telephone number transmitted via the first exchange (9) and executes a rerouting process for the call-back service subscriber telephone. The acquired latest telephone number is preferably set in a part of a predetermined message signal.

A remote access call return control method according to the present invention provides a remote telephone (1) accommodated in a first exchange (9).
Inputting the special number from the first telephone, transferring the input special number to the second exchange (10) via the first communication line (23), and transmitting the special number via the second communication line (24). A step of referencing the subscriber table (25) based on the subscriber number and the password input from 9) to determine whether or not the return call service can be provided; and determining that the return call service can be provided. And a step of executing a rerouting process.

In this case, the first communication line (23)
It is established between the exchange (9) and the second exchange (10). The second exchange (10) accommodates the return call subscriber telephone set. In the subscriber table (25), a plurality of pairs of subscriber numbers and passwords of call back service subscribers are registered. Preferably, the second communication line (24) is substantially established only when prompting for and inputting the subscriber number and password.

[0015] In the determining step, when it is determined that the call back service is to be provided, the latest telephone number is obtained by referring to the subscriber table (25) and the incoming call history table (26); Transmitting the latest telephone number obtained via the first communication line (23) to the first exchange (9). The incoming call history table (26) stores the latest telephone number received at the call back subscriber telephone set.

Preferably, the step of performing the rerouting process is performed on the call back subscriber telephone set (2) based on the latest telephone number transmitted via the first exchange (9). In this case, it is preferable that the acquired latest telephone number is set as a part of a predetermined message signal, and the set message signal is transmitted to the first exchange (9).

Note that the reference numerals given to the above constituent elements are provided for facilitating the understanding of the present invention, and should not be taken into consideration when considering the claims.

[0018]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows the first embodiment of the present invention.
1 is a block diagram of a remote access call return control system according to an embodiment of the present invention.

The present system comprises a telephone 1, a telephone 2,
External trunk (TRK) 3 and external trunk (TRK)
4, a register trunk (PBOR) 5, an announcement trunk (hereinafter, ANT) 6, an ANT 7,
ANT 8, central office exchange (remote office) 9, central office exchange (host office) 10, control device 11 and control device 22
It is composed of

The telephone 1 is accommodated in the central office 9.
In the present embodiment, the telephone 1 is a PB (Push Butt).
on) It is a telephone. The control device 22 is connected to the central office 9. The control unit 22 determines the No. It comprises a 7 link 18, a basic call control unit 19, a trunk connection control unit 20, and a rerouting control unit 21.

No. 1 is provided between the central office 9 and the central office 10. Seven links 23 have been established. ANT6 ~
8 are connected to the central office 10. The register trunk 5 is connected to the central office 10.

The telephone 2 is housed in the central office 10. The telephone 2 is a contract telephone for a call back service.
The control device 11 is connected to the central office 10. The control device 11 has the No. 7 signal control unit 12 and basic call control unit 1
3, a trunk connection control unit 14, a register signal control unit 15, a service control unit 16, and a data storage unit 17.
It is composed of No. 7 signal control unit 12
7 controls transmission and reception processing of signals.

The data storage unit 17 stores a subscriber table 25
And the incoming call history table 26 are stored. In the subscriber table 25, a plurality of pairs of the subscriber number and the password of the call back service subscriber are registered corresponding to the subscriber telephone number.
The incoming call history table 26 stores the latest telephone number received at the subscriber telephone set corresponding to the subscriber number.

The data registered in the subscriber table 25 and the incoming call history table 26 can be registered in one table corresponding to the subscriber telephone number. With the remote access call back control system according to the present embodiment,
The telephone 1 accommodated in the central office 9 to the central office 10
Is provided with a call back service to the telephone set 2 accommodated in the telephone number.

FIGS. 2 to 6 are flowcharts showing the operation of the remote access call back control system according to the present embodiment. FIG. 2 to FIG.
0 shows the internal processing flow of the control device 11 at 0. FIG.
Shows an internal treatment flow of the control device 22 in the central office 9.

In FIG. 1, a central office exchange (remote office)
9 to a central office exchange (host station)
A special number for accessing 10 is transmitted. The special number is a virtual telephone number registered in advance in the central office 10. The special number is stored in the data storage unit 17.

When an incoming call is detected in the host station 10, the basic call control unit 13 determines whether or not the incoming telephone number is a special number for a remote access call back service (FIG. 2, step S101). ). If it is determined in step S101 that the incoming telephone number is not a special number, the process proceeds to general call processing (FIG. 2, step S10).
5).

If it is determined in step S101 that the incoming telephone number is a special number, the basic call control unit 1
3 establishes a path 24 between TRK3 and TRK4,
No. 7 requests the signal control unit 12 to transmit a CON (Connect) signal (FIG. 2, step S102).

The service control unit 16 captures the PB tone from the remote station 9 in the register trunk 5 in order to receive the PB tone (FIG. 2, step S103). The trunk connection control unit 14 connects ANT1 to TRK4. ANT4
Directs the remote subscriber to enter a call back service subscriber number.

When the call back service contract subscriber number is dialed from the telephone 1, the register signal control unit 15 of the host station receives the dialed subscriber number (FIG. 3, FIG. 3).
Step S110), reporting to the service control unit 16.

The service control unit 16 requests the trunk connection control unit 14 to release ANT1. Service control unit 1
6 refers to the subscriber table 25 based on the received subscriber number after the release request, and determines whether the contracted subscriber is accommodated in the host station 10 (FIG. 3, step S112).

If it is determined in step S112 that the subscriber is not accommodated in the host station 10 (No in step S112 in FIG. 3), the service control unit 16
No. 7 requests the signal control unit 12 to transmit a REL (Release) signal (FIG. 3, step S114). RE
The L signal is a message signal defined by the ITU recommendation.

If it is determined in step S112 that the contracted subscriber is accommodated in the host station 10 (step S112: Yes in FIG. 3), the connection of the ANT 7 is requested to the trunk connection controller 14 (step S11 in FIG. 3).
3). The ANT 7 instructs the remote subscriber to enter a password.

When a password is input from the telephone 1, the register signal control unit 15 of the host station 10 receives the input password (FIG. 4, step S120),
This is reported to the service control unit 16.

The service control unit 16 sends a request to release the ANT 7 (step S121 in FIG. 4) and the register trunk 5
Is transmitted to the trunk connection control unit 14 (FIG. 4, step S122). The password registered in the subscriber is referred to the subscriber table 25 (FIG. 4, step S1).
23).

The service control unit 16 compares the received password with the registered password (FIG. 4, step S124). The registered password is a password that forms a pair with the received subscriber number in the subscriber table 25.

If it is determined in step S124 that the received password does not match the registered password, the service control unit 16 7 requests the transmission of the REL signal to the signal controller 12 (FIG. 4, step S126).

If it is determined in step S124 that the received password matches the registered password, the service control unit 16 requests the trunk connection control unit 14 to connect the ANT 8 (FIG. 4, step S12).
5). ANT8 notifies the remote subscriber that the passwords match and the call back service is to be performed.

The service control unit 16 determines in step S124
In (S125), the subscriber telephone number corresponding to the entered subscriber number and password is recognized.

After the announcement of the ANT 8 is completed, the service control unit 16 requests the trunk connection control unit 14 to release the ANT 8 (FIG. 5, step S130). The service control unit 16 refers to the incoming call history table 26,
The latest telephone number received by the subscriber telephone 2 is acquired (FIG. 5, step S131).

The service control unit 16 refers to the incoming call history table 26 based on the recognized subscriber telephone number. The acquired telephone number is a telephone number with an area code.

The service control unit 16 controls the REL signal Re
The obtained telephone number is set in the direction Number parameter (FIG. 5, step S132).
The service control unit 16 sets the No. 7 RE in the signal control unit 12
The transmission of the L signal is requested (FIG. 5, step S133).

In the remote station 9, 7 control unit 18
Receives the REL signal (FIG. 6, step S140),
This is reported to the basic call control unit 19. Basic call control unit 19
It is determined whether or not the Redirection Number parameter is set in the EL signal (FIG. 6, step S141).

In step S141, when it is determined that the Redirection Number parameter is not set in the REL signal, the basic call control unit 19
Executes the subscriber release process of the telephone 1 (FIG. 6, step S145).

In step S141, if it is determined that the Redirection Number parameter is set in the REL signal, the basic call control unit 19
The transmission of the RLC (Release Complete) signal is No. 7 to the signal control unit 18 (FIG. 6, step S142).

The basic call control unit 19 sends the REL signal Red
The set telephone number is obtained from the “action Number” parameter (FIG. 6, step S143),
It requests the rerouting control unit 21 to execute rerouting.

The rerouting control unit 21 executes a rerouting process in response to the request from the basic call control unit 19 (FIG. 6, step S144). By the rerouting process, a remote access call return service from the telephone 1 is executed.

In this embodiment, the rerouting process by the central office A (remote station) is executed based on the Redirection Number parameter set in the REL signal.

The communication line 24 between TRK3 and TRK4
Is held, rerouting processing is realized in the central office exchange 10 (host station). In this case, the communication line between the remote station 9 and the host station 10 is no. 7 links 2
It need not be 3.

[0050]

The remote access call return control system according to the present invention responds to a service provision request from a remote telephone other than the contract telephone.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a remote access call back control system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a part of the operation of the remote access call back control system according to the embodiment of the present invention.

FIG. 3 is a flowchart showing a part of the operation of the remote access call back control system according to the embodiment of the present invention.

FIG. 4 is a flowchart showing a part of the operation of the remote access call back control system according to the embodiment of the present invention.

FIG. 5 is a flowchart showing a part of the operation of the remote access call back control system according to the embodiment of the present invention.

FIG. 6 is a flowchart showing a part of the operation of the remote access call back control system according to the embodiment of the present invention.

[Explanation of symbols]

 1, 2: telephone 3,4: external trunk (TRK) 5: register trunk (PBOR) 6, 7, 8: announcement trunk (ANT) 9: central office exchange (remote office) 10: central office exchange (host office) ) 11, 22: Control device 12, 18: No. 7 signal control unit 13, 19: basic call control unit 14, 20: trunk connection control unit 15: register signal control unit 16: service control unit 17: data storage unit 20: trunk connection control unit 21: rerouting control unit 23: 1 communication line (No. 7 link) 24: second communication line 25: subscriber table 26: incoming call history table

Claims (10)

[Claims] 1. A first telephone exchange, and responding to a special number input from a user of a remote telephone accommodated in the first telephone exchange via a first communication line established between the first telephone exchange and the first telephone exchange. Then, a second exchange for establishing a second communication line with the first exchange, and a call back service subscriber telephone set of the user are accommodated in the second exchange, and are connected to the first exchange. And a second control unit connected to the second exchange and having a subscriber table, wherein the subscriber table has a plurality of pairs of subscriber numbers and passwords of call back service subscribers. Registered, the second control unit refers to the subscriber table based on the subscriber number and the password input from the remote telephone via the second communication line, and determines whether to provide a call back service. Judge the above Remote Access call-back control system, characterized in that to execute the rerouting process to first control unit. 2. The method according to claim 1, wherein the second communication line is used only when the subscriber number and the password are urged for input and only when the password is transferred.
2. The remote access call back control system of claim 1, wherein the system is substantially established. 3. The second control unit further includes an incoming call history table, wherein the incoming call history table stores a latest telephone number received by the call back service subscriber telephone, and the second control unit includes: If it is determined that the call return service is to be provided, the latest telephone number is acquired by referring to the subscriber table and the incoming call history table, and the acquired latest telephone number is obtained via the first communication line. 2. The remote access call back control system according to claim 1, wherein a telephone number is transmitted to said first exchange. 4. The re-routing process for the call-back service subscriber telephone set in response to the latest telephone number transmitted via the first switchboard. The remote access call back control system according to claim 1 or 3. 5. The remote access call according to claim 3, wherein the acquired latest telephone number is set as a part of a predetermined message signal and transmitted to the first exchange. Return control system. 6. A step of inputting a special number from a remote telephone set accommodated in the first exchange, a step of transferring the input special number to a second exchange via a first communication line, A communication line is established between said first exchange and said second exchange,
The exchange accommodates a call-back service subscriber telephone, and refers to a subscriber table based on a subscriber number and a password input from the remote telephone via the second communication line, and determines whether or not the call-back service can be provided. And a pair of a subscriber number and a password of a call back service subscriber is registered in the subscriber table, and when it is determined that the call back service can be provided, a rerouting process is executed. Performing a remote access call back control method. 7. The communication system according to claim 1, wherein the second communication line is used only when prompting for input of the subscriber number and the password and when transferring the password.
7. The remote access call back control system of claim 6, wherein the system is substantially established. 8. The step of obtaining the latest telephone number by referring to the subscriber table and the incoming call history table when it is determined that the call back service is to be provided; Storing the latest telephone number received by the call back service subscriber telephone in the table, and transmitting the obtained latest telephone number to the first exchange via the first communication line. 7. The remote access call back control method according to claim 6, further comprising: 9. The step of executing the rerouting process is performed on the call-back service subscriber telephone based on the latest telephone number transmitted via the first exchange. 9. The remote access call return control method according to claim 6, wherein 10. The remote access call according to claim 7, wherein said acquired latest telephone number is set as a part of a predetermined message signal and transmitted to said first exchange. Return control method.