JPS61176233A - Mailbox system - Google Patents

Abstract

PURPOSE:To avoid the congestion of an inter-office circuit by shifting CONSTITUTION:Mailboxes A4-N4 store the mails of voices, pictures, etc. addressed to a specific subscriber. These mails are read.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the invention Industrial field of application The present invention relates to a mailbox system in a telephone system in which the switching center accommodating a subscriber is automatically changed as the subscriber moves. .

2. Related Art Conventionally, in telephone systems such as automobile telephone systems in which the subscriber accommodating exchange, equivalent to a subscriber switching center, is automatically changed as the subscriber moves, the subscriber's mailbox is It was fixed at the prison exchange.

Problems to be Solved by the Invention In the conventional system, a subscriber's mailbox is fixed to a specific subscriber accommodating exchange, so the accommodating exchange changes as the subscriber moves. Then, each time a mailbox is accessed, communication between the new and old subscriber accommodating exchange offices is required, leading to the problem of congestion in the inter-office lines.

The mailbox system of the present invention, which solves the problems of the conventional system described in ``Means for Solving the Problems of Structure of the Invention'', does not fix the subscriber's mailbox to a specific station, but instead transfers the subscriber's mailbox to the switching exchange to which accommodation is to be changed. By automatically relocating, it is configured such that inter-office communication is not required for subsequent access.

Hereinafter, the effects of the present invention will be explained in detail by way of examples.

Embodiment FIG. 1 is a block diagram showing the configuration of a telephone system to which an embodiment of the mailbox method of the present invention is applied.

This telephone system includes a plurality of exchanges A, B...N.

Exchange A has a communication path switch A1 and a central control unit ffA2.
, subscriber information file A3 and mailbox A4. Similarly, the other exchanges B to N also have communication path switches B1 to N1 and central control units B2 to N2, respectively.
, subscriber information files B3 to N3, and mailboxes B4 to N4.

Mail boxes A4 to N4 store voice, image, and other mail addressed to specific subscribers, and these mails are read out in response to requests from the specific subscribers.

Based on changes in network reception sensitivity due to the movement of subscriber S,
The nearest exchange among the exchanges A to N is automatically selected as the accommodating exchange.

In addition, when changing the accommodating exchange, subscriber information such as subscriber number is transferred from the subscriber information file of the old accommodating exchange to the subscriber information file of the new accommodating exchange via the common signal line between the stations. Automatically forwarded.

As shown in FIG. 1, while subscriber S is accommodated in exchange A, a mailbox Ms for subscriber S is secured in mailbox A4 of exchange A.

Thereafter, as the subscriber S moves and the accommodating exchange is changed from A to B as shown in FIG. 2, the mailbox Ms is also moved to the exchange B.

That is, when switching center A detects that subscriber S has left its own service area due to a decrease in network reception sensitivity for subscriber S, switching center A transmits the number of subscriber S read from subscriber information file A3 to the exchange center. The information is sent to the other exchanges B to N via the common signal line between them, and the location of the subscriber is determined in advance. When exchange A receives a response to the above arrangement from exchange B, exchange A reads out information about subscriber S from subscriber information file A3 and transfers it to exchange B via the common signal line. At this time, exchange A selects the mailbox Ms from the read subscriber information.
4) and transfers mailbox Ms to exchange B via inter-office line AB.

The exchange B registers the subscriber information transferred on the common signal line in the subscriber information file B3, and also secures a mailbox Ms for the subscriber S in the mailbox B4 based on this subscriber information. After this, exchange B transfers the contents of the mailbox Ms transferred from exchange A via the inter-office line A'R to the mailbox M that has been newly secured.
Store in s. This completes the automatic transfer of subscriber S's mailbox.

Effects of the Invention As explained in detail above, the mailbox system of the present invention is configured so that the subscriber's mailbox is not fixed to a specific exchange, but is automatically transferred to the switching exchange where the accommodation is changed. This eliminates the need for inter-office communication, avoids congestion in inter-office lines, and improves equipment usage efficiency. In addition, the recipient of the service benefits from lower call charges.

[Brief explanation of drawings]

FIGS. 1 and 2 are block diagrams showing the configuration of a telephone system to which a mail box system according to an embodiment of the present invention is applied. A to N...Switching center, A1 to Nl...Call path switch, A2 to N2...Central control unit, A3 to N3...Subscriber information file, A4 to N4...Mail box,
S...Subscriber.

Claims (1)

[Scope of Claims] In a mailbox system in a telephone system in which the exchange that accommodates the subscriber is automatically changed as the subscriber moves, the subscriber's mailbox is moved to the subscriber exchange that accommodates the subscriber. A mailbox method that is characterized by automatic relocation.