JPH01254055A - Trunk incoming service system - Google Patents

Abstract

PURPOSE:To effectively offer service equivalent to an extension to a trunk incoming call from a trunk line and to contrive the repletion of the service function by detecting whether or not caller identification information exists in a transmitted message. CONSTITUTION:When an incoming call takes place in trunks 5a-5m to an exchange 1, whether or not caller identification information exists in the message sent via a control in this case is detected by a caller information detection section 8. When the caller identification information exists in the message, the control (permission/restriction) whether or not the service equivalent to the extension is to be offered to the trunk incoming call is applied. Thus, it is possible to receive the offer of the service function provided on the exchange 1 even from the trunk line not only from the extension terminals 4a-4n accommodated in the exchange 1 and the service function in the exchange 1 is enriched.

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention (Industrial Application Field) The present invention relates to a trunk call service system that can effectively provide service functions provided in an exchange to trunk call calls. .

(Conventional technology) Recently, efforts have been made to enhance the service functions of switching equipment.

However, the provision of this service is generally limited to extension terminals connected to exchanges.

That is, a central office line connected to an exchange is generally not separated into an information channel and a control channel, as is the case with extension lines. For this reason, the central office line (network) cannot automatically add caller identification information to incoming trunk calls to the exchange, and it is also impossible for the exchange to provide services using this caller identification information. It was possible.

However, as communication networks become more sophisticated, attempts have recently been made to separate central office lines (communication lines) into information channels and control channels, and to use the control channels to send various types of information.

For example, caller identification information is automatically added to the call information over the network and sent to the exchange via the control channel,
Also, attempts have been made to send intentional information from users via the control channel.

However, in developing various services at exchanges,
There was a problem in how to use the control channel to develop services.

(Problems to be Solved by the Invention) As described above, in the conventional switching system, the range in which the service functions provided in the switching system can be provided is limited to extension terminals. There was a problem with how to provide services.

The present invention has been made in consideration of these circumstances, and its purpose is to provide effective service to incoming trunk calls in an exchange connected to a communication network equipped with an information channel and a control channel. The purpose of this invention is to provide a trunk call termination service system that can be realized.

[Structure of the Invention] (Means for Solving the Problems) A trunk call termination service system according to the present invention includes a station that includes an information channel and a control channel, and sends caller identification information via the control channel. A switch connected to the line detects whether or not caller identification information exists in a message sent via the control channel for an incoming trunk call that occurs at the switch, and detects whether caller identification information is present in the message sent via the control channel. The present invention is characterized in that when identification information is present, a service equivalent to an extension line can be provided to the trunk incoming call.

In addition, if necessary, it is determined whether or not the detected caller identification information has been registered in advance, and then a service equivalent to an extension is permitted, and the service usage record with the caller identification information added is recorded as a history. This feature is characterized in that the above-mentioned services are provided after the information remains intact.

(Operation) According to the present invention, when a trunk incoming call occurs at the exchange,
It is then detected whether caller identification information is present in the message sent via the control channel. When caller identification information is present in the message, control (permission/regulation) is performed as to whether or not to provide a service equivalent to an extension line to the trunk incoming call. As a result, it becomes possible to receive the service functions provided in the exchange not only from the extension terminals housed in the exchange but also from the central office line, thereby making it possible to enhance the service functions of the exchange.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a switching system to which a trunk call termination service system according to an embodiment of the present invention is applied.
1 is the main body of the exchange, and 2 is the central control unit. The exchange main body 1 is connected to extension terminals 4a, .about.4n via extension interfaces 3a, .about.3n, respectively, and is also connected to a central office line via central office line trunks 5a, 5IIl.

Further, a telephone service device 6, such as a voice mail device, is connected to the exchange main body 1, for example.

Here, the above-mentioned central office line is equipped with an information channel and a control channel, and the communication network constituted by this central office line automatically generates caller identification information in response to the occurrence of a call, and transmits this to the above-mentioned control channel. It has the ability to send via channels.

According to the control program stored in the storage device 7, the central control device 2 controls the extension interface 3a.
, 3b, the central office line trunks 5a, ~5m, and the telephone service device 6, and send and receive various control information to and from the main body of the exchange.
Controls the connection of telephone lines through. When the extension terminals 4a, .about.4n request a telephone service, the extension interfaces 3a, .about.3m accommodating the extension terminals 4a, .about.4b are connected to the telephone service device 6 to provide the service. ing.

Here, the central control device 2 includes the central office line trunk 5a.
, ~511, when an incoming call occurs, the caller detects the caller identification information sent via the control channel and controls whether or not to provide a service equivalent to an extension for this trunk call. An information detection section 8 is provided.

The caller information detection section 8 includes a caller identifier detection section 11, an example of which is shown in FIG. Caller identifier registration table 12. Trunk service control unit 13゜History registration unit 1
4. When an incoming call occurs on the central office line trunks 5a to 511, the caller identifier detection unit 11 detects the caller identifier (as caller identification information) in the incoming message sent via the control channel of the central office line. This is to detect whether or not the calling number information element and the calling subaddress information element are included.

Note that the caller identification information may be detected from information included in the user-user information element in the incoming message sent via the control channel. Further, at this time, cryptographic information for confirming the authenticity of the sender may be detected from the user/user information.

When a caller identifier is detected by the caller identifier detection unit 11 in this way, the caller identifier registration table 12 is searched to check whether or not the caller identifier has been registered in advance, and the trunk incoming call is checked. Whether or not to permit a service equivalent to an extension for a call is controlled.

It goes without saying that if the incoming message does not include a caller identifier, the provision of a service equivalent to an extension line to the trunk incoming call is of course prohibited. Even if a caller ID is detected, if the caller ID is not registered in the caller ID registration table 12, the provision of a service equivalent to an extension for that trunk call may be prohibited, or the service may be prohibited. Content may be restricted.

When it is confirmed that the detected caller identifier is registered in the caller registration table 12, the trunk service control unit 13 is activated. By activating the trunk service control unit 18, a service equivalent to an extension line, that is, a service equivalent to a service for an extension line, is provided to the trunk call. Thereafter, the history registration section 14 is activated, and the usage history for that service is stored in the incoming call history storage section 9 of the storage device 7 together with the caller identification information.

For example, as shown in FIG. 3, the incoming call history storage unit 9 stores a caller identifier for each service provided.

This is done by writing the service content, service time, etc. The history information stored in the incoming call history storage section 9 is used, for example, for billing the user using the service from the communication network.

As described above, in this switching system, when an incoming trunk call from a communication network consisting of an information channel and a control channel occurs, caller identification information is included in the incoming message sent via the control channel. It is detected whether or not. When caller identification information is included, a service equivalent to an extension line is permitted to be provided for the trunk incoming call in accordance with that information. Therefore, it becomes possible to receive the service functions provided in the exchange not only from the extension terminals housed in the exchange but also from external terminals connected to the exchange via the central office line.

Moreover, the exchange side can know the caller receiving the service from the caller identification information.
It is possible to effectively charge for the service provided. Furthermore, since it becomes possible to specify users who can provide services, it is possible to prevent unauthorized use of the service functions and provide effective services. In other words, it becomes possible to effectively enhance service functions.

Note that the present invention is not limited to the embodiments described above. For example, as the service function equivalent to an extension line, various conventionally proposed service functions can be used as appropriate. Furthermore, the method of detecting caller information from the control channel in trunk call termination is not particularly limited. In addition, the present invention can be implemented with various modifications without departing from the gist thereof.

[Effects of the Invention] As explained above, according to the present invention, it is possible to effectively provide a service equivalent to an extension line for incoming trunk calls from a central office line, and the service functions can be effectively enhanced. In practical terms, great effects can be achieved, such as the ability to achieve

[Brief explanation of the drawing]

The figure shows one embodiment of the present invention, and FIG. 1 is a schematic configuration diagram of a switching system configured by applying the method of the embodiment.
FIG. 2 is a block diagram of the caller information detection unit showing the flow of service control for trunk calls, and FIG. 3 is a diagram showing an example of storing history information for service provision. l...Exchange main body, 2...Central control device, 3a, ~
3n...Extension interface, 5a, ~5g...
Office line trunk, 6... Telephone service device, 8... Caller information detection section, 11... Caller identifier detection section, 12
... caller identifier registration table, 13 ... trunk service control section, 14 ... history registration section. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 3N

Claims (3)

[Claims] (1) means for detecting whether or not caller identification information is present in a message sent via the control channel of a trunk incoming call that occurs via a central office line consisting of an information channel and a control channel; , a control means for controlling the provision of a service equivalent to an extension line to the trunk incoming call when caller identification information is present in the message. (2) The trunk terminating service according to claim 1, wherein provision of the service for trunk terminating calls is permitted after determining whether or not the detected caller identification information is registered in advance. method. (3) The trunk terminating service system according to claim 1, wherein the service for trunk terminating calls is provided after keeping a service usage record with caller identification information added as a history.