JPS58175340A - Interrupting system of store communication - Google Patents

Abstract

PURPOSE:To enable a communication which gives the priority to an instantaneous call, by performing a switch to the instantaneous call in case an incoming request is given from another subscriber while a certain subscriber is receiving a message of a store call. CONSTITUTION:An exchange 2a connects a picture information transmission control part 2e to a terminal 1b, and a central control part 2b transmits a written message in a picture information memory 2d to the terminal 1b. Meanwhile a subscriber 3 gives an instantaneous call to a subscriber 1. Then an incoming monitor part 2f informs the incoming request of the instantaneous call to the subscriber to the part 2b. The fact that the subscriber 1 is under communication and that the corresponding call is equal to a store call is stored to a primary memory 2c. Based on these informations, the part 2b cuts off forcibly the store call by taking a pause of transmission of each page as an opportunity. Then the exchange 2a detects an on-hook of a line 1c and informs it to the part 2b. The part 2b connects the subscribers 1 and 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an interrupt method when an immediate call termination request is received while a stored call message is being received.

Conventionally, communication by telephone has been processed as a so-called instant call, in which the sender and receiver talk in real time, without particularly storing the voice messages.

In recent years, in facsimile communications, etc., so-called message storage and forwarding services have become popular, in which a storage device is interposed between the sender and the recipient, and messages sent by the sender are stored in the storage device and then sent to the recipient. be.

A specific example of such a service is a facsimile box service, which is a post office box-like service in facsimile communication. In this service, when a subscriber with a facsimile receiving terminal instructs the storage device to start a facsimile box, all messages received during that time (hereinafter referred to as correspondence) are stored in the facsimile box for up to two hours after that. Ru. The subscriber can read out the messages in the facsimile box at any time, but if the number of messages in the facsimile box is 20.
If there are as many as ~30 pages, while the message is being received, all incoming telephone calls to the subscriber will be turned away because they are in communication (Pino). Therefore, in such a case, there is an inconvenience in that even if the user wants to make an emergency call to the subscriber, he or she cannot do so.

In order to eliminate the above-mentioned drawbacks, the present invention focuses on the fact that stored calls do not necessarily require urgency, and that messages in stored calls can be retransmitted at any time because they are stored in a storage device. When there is a request for one immediate call to a receiving subscriber, the immediate call is preferentially interrupted and connected.

FIG. 1 shows a first embodiment of the present invention. FIG. 1 shows an example of a private branch exchange to which the present invention is applied, and the exchange is also capable of store-and-forward. 1 m' is a telephone and lb is a facsimile terminal, both of which have the same subscriber number or extension number, and are connected to the facsimile terminal only when a special signal tone is transmitted from the incoming call exchange. ing. 2a is a private branch exchange, 2b is a central control section, 2c is a main memory, 2d is an image information memory, and 2e is an image information transmission control section. The exchange 2a transmits image information to the image information transmission control unit 2 using the path PI.
e and the facsimile terminal 1bi are connected to the central control unit 2b.
transmits the facsimile message in the image information memory 2d to the terminal 1b via the image information transmission control section 2e, and
It is assumed that the message is being received. When subscriber 3 makes an immediate call to subscriber 1 during this receiving period, incoming call monitoring unit 2f notifies central control unit 2b that there is a request for immediate call incoming to subscriber 1. .

Main memo I indicates that subscriber l is communicating, the call is a stored call, and subscriber l is receiving a message.
It is recorded in J 2 e. Based on this information, the central control unit 2b starts monitoring the trigger for disconnecting the stored call in order to promptly disconnect the stored call and reconnect to the immediate call. The image information transmission control unit 2e stores the page being transmitted as an image information memo IJ.
When the page reception confirmation signal is received from the terminal 1b and the page reception confirmation signal is received from the terminal 1b, the central control unit 2
Notify b. , # In order to forcibly disconnect the stored call at the end of each member's transmission, the central control unit 2b causes the image information transmission control unit 2e to interrupt the transmission of the subsequent page, and sends the message to the facsimile terminal 1b for the time being. 7. The terminal 1b then turns on the subscriber line lc. state (
loop disconnection) and notifies the exchange 2a that the subscriber line is not in use. Exchange 2a is subscriber line IC
When it detects that it has become on-hook, it notifies the central control unit 2b, which has stored it in the main memo IJ2C. The record that subscriber 1 is in communication, that the call is a stored call, and that a message is being received is temporarily erased, and a new record is written in the main memory 2C that subscriber 1 is receiving an immediate call. Make me remember. The central control unit 2b is connected to the path P.
i'(H disconnects, sends a ringing tone to the subscriber line IC, and calls subscriber 1.

When the subscriber 1 takes off-hook the telephone 1a and makes a response, the central control unit 2b connects the subscriber line 3b and the subscriber line IC to the path P.
2, and subscriber 3 and subscriber l start talking. Furthermore, the central control unit 2b rewrites the status of subscriber l on the main memo IJ2e from immediate call reception to immediate call communication.

The image signal transmission control section 2e transmits the signal to the central control section 2b every 5 minutes, for example.
A connection request is made to subscriber 1 at
Automatic off-hook of terminal 1b and subscriber line IC of terminal 1b
When it detects that it is connected to the bus, it sets the bus to put. Thereafter, the image information transmission control unit 2e resumes transmission of the message from the message of the page immediately after the page transmitted up to the point in time when transmission was previously interrupted.

A second embodiment of the invention is shown in FIGS. 2 and 3. This embodiment shows a case in which there is a storage device above a relay exchange, and the relay exchange performs communication path exchange processing between the storage device and subscribers. FIG. 2 is an example of a configuration diagram of a storage circuit switching network, and FIG. 3 is an example of a signal sequence diagram of the storage circuit switching network.

First, FIG. 3 will be explained. 4 is a terminating subscriber, 5 is a subscriber exchange, 6 is a transit exchange, 7 is a storage device, and 8 is a subscriber exchange. While the storage device 7 is transmitting image information prx '1 to the facsimile terminal of the subscriber 4, the subscriber exchange 8
When the local exchange 5 receives an immediate call termination request to the subscriber 4 from The exchange 8 then returns a message such as "Please wait for a while" to the caller. The subscriber exchange 5 further transmits an interruption request (1) signal for disconnecting the stored call to the trunk exchange 6 over the common line, and the exchange 6 further sends an interruption request (2) signal to the storage device 7 over the common line. Send by. The storage device 7 starts monitoring the end of one page transmission, sends a response (1) signal back to the exchange 6, and further sends a response (2) signal back to the exchange 5.
The exchange 5 waits until the subscriber line of the subscriber 4 becomes hook-on. When the storage device 7 finishes transmitting one page of image information PIX 'i, it sends a page end signal EOM to the destination terminal via the communication line, and if the destination terminal has received the page normally, it sends a page reception confirmation signal MCF. It is returned to the storage device 7. The storage device 7 interrupts the transmission of the subsequent page even if there is a subsequent page, and sends a disconnection request signal DCN to the destination terminal via the communication line to disconnect the communication path between the storage device 7 and the subscriber 4. . When the destination terminal receives the DCN, it ends the reception operation and puts the subscriber line into 7 quotas/state. When the local exchange 5 detects the hook-on state, it sends a disconnection request signal requesting the intermediate exchange 6 to disconnect the line between the storage device 7 and the local exchange 5 that was being used for the subscriber 4. LCN 1
The exchange 6 then disconnects the line and notifies the storage device 7 of the disconnection request signal LCN2. Note that the LCA 1 and LCA2 signals are returned as acknowledgment responses to the LCN 1 and LCN 20 signals, respectively. When the subscriber exchange 5 receives the LCA 1 signal,
In order to connect a waiting immediate call to the subscriber 4, a ringing tone RGT'i is sent to the subscriber 4, and when the subscriber hooks off with the telephone, a connection completion signal is sent back to the originating local exchange 8. After this, an immediate call to the subscriber 4 can be made.

Next, FIG. 2 will be explained.

4 is a subscriber, 4a is a telephone, 4b is a facsimile terminal,
4c is a subscriber line, 5a, 6a, 8a are switching sections, 5b, 6
b, 8b is the central control unit, 5c, 6c.

8C is the main memory, 5d, 6d, 8d are common line devices, 7a
Fi transmission control section, 7b is the main control section, 7c is image information memo U
, 7d is the common line capacity, 9 is the subscriber, 9a is the telephone, 9b
is the subscriber line.

The transmission control section 7a sequentially reads the image information of the facsimile message from the image information memory 7c according to instructions from the main control section 7b, and transmits it to the facsimile terminal 4b via the communication line.

During this time, the main memo IJ5e of the subscriber exchange 5 stores the status of the subscriber line 4c indicating that it is communicating by a stored call and is receiving a message. When subscriber 9 sends a message requesting immediate call connection to subscriber 4 via telephone 9&, central control unit 8b sends an immediate call termination request signal to terminating subscriber 4 via common line device 8di. When the central control unit 5b receives the signal via the common line device 5di, it checks the status of the subscriber line 4c in the main memory 5C and determines whether communication is in progress using a stored call. Dekatsu knows that a message is being received. Therefore, a standby signal is sent back to the originating exchange Ifa8 via the common line device 5d, and
Similarly, the central control unit 6b transmits an interruption request (1) signal to the trunk exchange 6 via the common line device 5d (i7). When the central control unit 6b receives the interruption request signal, it further sends an interruption request to the common line device 6d'j (via the storage device 7). (2) Send a signal. Main control unit 7
When b receives the interruption request (2) signal, the transmission control unit 7a
to suspend sending messages to subscriber 4,
When the transmission control unit 7a receives the MCF signal for the page being transmitted, it transmits the DCN signal to the subscriber 4 via the communication line, and cancels the message transmission process regardless of whether there is a subsequent page. When the facsimile terminal 4b receives the F'1DCN signal, it stops receiving operation and turns on the subscriber line 4c. state. When the central control unit 5b detects the on-hook state (indicating that the subscriber line 4c is not in use) of the subscriber line 4c via the exchange unit 5al, it immediately rewrites the status display of the subscriber line 4c in the main memory to indicate that a call is being received, and then switches the subscriber line 4c to the relay exchange. 6, transmits the LCN 1 signal via the common device 5d (-1 central control unit 6bij applies, C
Upon receiving the N1 signal, the storage device 7 and the subscriber exchange 5
The line used for subscriber 4 is disconnected, and the LCN 2 signal is transmitted to storage device 7 via line 6d.

On the other hand, when the subscriber exchange 5 receives the LCA 1 signal from the transit exchange 6, it rings on the subscriber line 4c) -n RGT
Send i and call phone 4ai. Subscriber 4 uses telephone 4a
When the hook-off occurs, the central control unit 5b detects the hook-off via the switching unit 5a, rewrites the status of the subscriber line 4c on the main memo 'J S e to immediate call communication, and also updates the status of the subscriber line 4c via the common line device 5di. A connection completion signal is returned to the originating local exchange 8, and the central control unit 8b selects one of the trunk lines between the terminating local exchange 5 and its own exchange, and connects it to subscriber #9b.

If there is a page waiting to be sent to the subscriber 4, the main control unit 7b of the storage device 7 requests the destination exchange 5 to receive a stored call to the subscriber 4 via the relay exchange 6 via the common line device 7di every 5 minutes, for example. Send. The central control unit 5b'1 checks the status display t of the subscriber line 4c in the main memory unit 5c, and if it is in communication, returns a negative response to the storage device 7 via the exchange 6B, and if it is not in communication, it returns a negative response to the storage device 7. If there is, for example, a special signal is used to make a silent call without using the ringing tone RGT i, and connect the facsimile terminal 4b to the storage device 7 via the all-relay exchange 6.

Thereafter, the storage device 7 transmits the transmission message to the facsimile terminal 4b.

In the following explanation, the predetermined trigger for interrupting message transmission from the storage device is the time when one page transmission is completed, but it may also be in the middle of one page, or when the reverse K1 page is interrupted. If the page is in the middle of transmission and there is a large amount of remaining information on the page and the user can wait several minutes until the page conversion is completed, there is a method of not allowing interruptions. In other words,
This method does not apply the present invention if it is determined that the immediate call originator will be kept waiting for more than enough time until a predetermined opportunity.

Further, in the above description, facsimile information has been explained as a message, but the present invention can also be applied to a stored call of a message containing code information such as kana, numbers, or kanji, or voice information, and the present invention can be effective. Furthermore, although the subscriber line has been described as an analog line, it is clear that digital subscriber IsK is also applicable.

As explained above, according to the present invention, a subscriber pays attention to the unique feature of a stored call that messages are stored in a storage device and can be retransmitted even if interrupted by an interrupt. If there is an immediate call termination request from another subscriber during reception, by switching to the immediate call, it is possible to perform communication giving priority to the immediate call.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a private branch exchange in a first embodiment of the present invention, Fig. 2 is a block diagram of a storage line switching network in a second embodiment of the present invention, and Fig. 3 is a block diagram of a storage line according to the present invention. FIG. 2 is a diagram illustrating an example of a signal sequence of a switching network. 1.3...Subscriber, la, 3a...telephone, 1b.
...Facsimile terminal, 2a...Private branch exchange, 2b.
- Central control unit, 2c... Main memory, 2d... Image information memory, 4.9... Subscriber, 5.8... Subscriber exchange, 6... Relay exchange, 7... Accumulator, 4m, 9
m...telephone, 4b...facsimile terminal, 5 m
, 6 m + 8'... exchange part, 5b, 6b, 8
b.--Central control unit, 5c, 6c, 8e-=main memory;
5d, 6d, 7d, 8d... common line device, 7a...
Transmission control device, 7c... image information memory. Figure 1 Figure 3

Claims (4)

[Claims] (1) In a circuit-switched network where stored calls and immediate calls coexist,
When a subscriber's terminal is receiving a stored call message and the terminating terminal accommodation switch detects that the subscriber receives an immediate call, the stored call is forcibly disconnected at a predetermined timing. ,' A storage communication interrupt system characterized in that the immediate call is terminated to the subscriber. (2) In a circuit-switched network where stored calls and immediate calls coexist,
means for storing whether a call being communicated by a subscriber is a stored call and a message is being received; a means for determining whether there is an immediate call termination request for one thousand subscribers; means for disconnecting the ten stored calls at a predetermined timing when there is an immediate call termination request while receiving a call message; and after disconnecting the stored calls by the thousand means, the immediate call termination request is made. 1. A storage communication interrupt system characterized in that a subscriber accommodating storage-switching device is provided with a means for notifying the subscriber of the above information. (3) In a circuit-switched network where stored calls and immediate calls coexist,
means for storing whether a call being communicated by a subscriber is a stored call and a message is being received; a means for determining whether there is an immediate call termination request for the subscriber; means for requesting the storage device to disconnect the stored call when there is an immediate call termination request while receiving the message; means for monitoring whether the stored call has been disconnected; A storage communication interrupt system characterized in that a subscriber accommodating exchange is provided with means for notifying the subscriber that there is an immediate call termination request after disconnection. (4) Means for the storage device to monitor whether or not there is a transmission interruption request while transmitting the stored message, and means for suspending transmission of the message at a predetermined timing when there is a transmission interruption request. , and means for retransmitting a message whose transmission has been interrupted.