JPS5910105B2 - Message weighting control device in automatic exchange - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a message waiting control device in an automatic switchboard, and more particularly to a message waiting control device in an automatic switchboard that audibly displays the presence of a message.

Message waiting is a function in a hotel, for example, that displays a message in a guest room. In this kind of conventional message waiting control device, a special telephone called a telephone with a message lamp is used, and the presence of a message is displayed in the guest room by lighting up the lamp attached to the telephone.

The lamp attached to this telephone is designed so that it will not light up unless a high voltage is applied to it so that it will not light up with normal talking current or ringing signals. For this reason, an additional circuit was provided in the line circuit of the exchange, and a high voltage for lighting the lamp of the message lamp-equipped telephone was supplied from this additional circuit to the line circuit. According to such a conventional message waiting control device, (
1) A special telephone called a telephone with a message lamp is required.

(2) It is necessary to provide an additional circuit to the line circuit in order to light up the lamp of the message telephone. (3)
There were major drawbacks in terms of implementation and economy, such as the need for a special voltage power supply to light up the lamp of the message telephone. SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned conventional drawbacks by ringing extensions registered for message waiting at regular intervals, and to provide an economical message waiting control device for automatic switching equipment with fewer message-dedicated circuits. There is a particular thing.

The present invention provides a message waiting control device which is provided with a message information transmission circuit that notifies an automatic exchange that there is a message, and which transmits the message to a corresponding extension of the automatic exchange. , a message waiting storage means for storing information on whether or not a message is transmitted to the extension and time counting information of a calling cycle as message weighting information; and a memory writing means for registering the message weighting information in the message waiting storage means. a memory reading means for reading out the message weighting information registered in the message weighting storage means by the memory writing means; and a memory reading means based on the message weighting information read by the memory reading means. A time monitoring means for monitoring a predetermined call duration time for the extension and the message waiting are registered through a communication path control means for controlling the connection of message transmission to the extension according to output information from the extension. An object of the present invention is to provide a message waiting control device for an automatic exchange, characterized in that it is equipped with a calling means for audibly calling an extension.

Next, embodiments of the present invention will be described with reference to the drawings.

In the drawing, 1 is an extension telephone, 2 is a switching network, and 3 is a trunk section, among which 3a is a calling signal trunk and 3b is a notification trunk.

An extension telephone 1 is connected to the line side terminal of the switching network 2, and a calling signal trunk 3a is connected to the trunk side. Furthermore, a communication path control circuit 4 is connected to the switching network 2, and a time monitoring circuit 5 is connected to this communication path control circuit 4.
Furthermore, a memory read circuit 6, a memory counter 8, and a memory write circuit 10 are connected to the communication path control circuit 4. A message weighting storage circuit 7 stores message weighting information, and has a 1-bit weighting message memory 7a and a 3-bit time monitoring information storage memory 7b.

Further, the memory read circuit 6 has a 2-input AND gate 6a and a 3-input AND gate 6b. The output terminal of the message weighting memory 7a of the message weighting memory circuit 7 is connected to one input terminal of the AND gate 6a, and each output terminal of the time monitoring information storage memory 7b is connected to each input terminal of the AND gate 6b. The output terminal of this AND gate 6b is connected to the other input terminal of the AND gate 6a. Reference numeral 9 denotes an office line relay board which is an operation command unit that issues operation commands for writing and erasing message weighting information in the message weighting storage circuit 7. A memory writing circuit 10 is connected to this office line relay board 9. ing.

A memory address counter 8 , a first memory write gate circuit 11 , and a memory write gate control circuit 12 are connected to this memory write circuit 10 . The first memory write gate circuit 11 includes AND gates 11a, 11b, 11c, and 11d whose input conditions are the output signal of the memory write circuit 10 and the output signal of the memory write gate control circuit 12.
has. Reference numeral 13 denotes a memory read gate circuit, and three two-input AND gates 13a, 13b, and 13c whose input conditions are the output signal of the message weighting memory 7a and the output signal of the time monitoring information storage memory 7b of the message weighting storage circuit 7, respectively. has.

14 are these AND gates 13a, 13b and 13
15 is a memory rewrite control circuit which uses the output signal of c as an input condition, and 15 is a second memory write gate circuit.

This second memory write gate circuit 15 receives the output signal of this memory rewriting control circuit 14, the output signal of the message waiting memory 7a in the message waiting storage circuit 7, and the output signal of the memory write gate control circuit 12. Three 3-input AND gates 15a whose input conditions are
15b and 15c. In the message waiting control device according to the present invention having the above configuration, writing and erasing of information in the message waiting storage circuit 7 is performed by operating a key on the office line relay board 9 through the memory writing circuit 10 and the first memory writing gate 11. The message weighting storage circuit 7 is configured to store a 1-bit message weighting memory 7a that stores the presence/absence of message weighting in accordance with the line side storage position information of the switching network 2, and a time storage circuit 7. It is configured to have a total of 4 bits including a 3-bit time monitoring information storage memory 7b for storing monitoring information.

Addressing of the message weighting storage circuit 7 is performed by a memory address counter 8. Now, when writing the message weighting information corresponding to the extension telephone 1 to the message weighting storage circuit 7, when the extension number N of the extension telephone 1 is sent from the office line relay stand 9, the extension number N is stored in the memory writing circuit. 10, where it is converted into accommodation location information SN of the extension telephone 1.

Memoriat 1 by this converted accommodation position information SN
The response counter 8 is a message weighting memory circuit 7.
Address designation signal A is sent to. On the other hand, the written information W,
, W2, W3 and W4 are the AND gates 11a, 11b, 11c and 1 of the first memory write gate circuit 11.
Guided by 1d. The first memory write gate circuit 11 is operated by the memory write gate control signal WCl from the memory write gate control circuit 12 to write information Wll, W2, W3 to the message waiting storage circuit 7.
1 and W4, are sent. Write information W, l at this time
The information of the logic signal "1" is written into the message weighting memory 7a which displays the presence/absence of message weighting, and the written information W2l, W3l and W
4l, information of 6000'' is written in the time monitoring information memory 7b.The information written in the message waiting storage circuit 7 is read out every second under the control of the memory address counter 8. Read information R
,, R2, R3 and R4 are the memory read gate circuit 13
The data is sent to the memory rewrite control circuit 14 via the. Memory reading game. - Each AND gate 13a, 13b and 13c of the gate circuit 13 is connected to the message weighting memory 7a.
Open only when n words are read. That is,
The information R read out from the message weighting memory 7a of the message weighting storage circuit 7 is represented by each AND gate 13a, 13b of the memory read gate circuit 13.
The information R2, R3 and R4 read from the time monitoring information storage memory 7b are guided to one input terminal of each of the AND gates 13a, 13b and 13c, respectively.
3c. Read signals R5, R6 and R7 are sent from memory read gate circuit 13 to memory rewrite control circuit 14. This memory rewriting control circuit 1
4 is the output information R8 of information obtained by adding 61″ to the input information,
Create R, and RlO. This output information R8, R9
and RlO are input to each AND gate 15a, 15b, and 15c of second memory write gate circuit 15. In the second memory write gate circuit 15, each AND gate 15a, 15b and 15c inputs the read signal R1 from the message weighting memory 7a in the message weighting storage circuit 7, and the gate from the memory write gate control circuit 12. It operates according to the control signal WC2 and 0 output information R8, R, and RlO from the memory rewriting control circuit 14, and the read information of the memory read gate circuit 13 is set to 61.
600F, that is, 600F, is written into the time monitoring information storage memory 7b. At this time, each of the gates 15a to 15c of the second memory write gate circuit 15 receives a message from the memory write gate control circuit 12 when the message weighting memory 7a, which indicates the presence/absence of message weighting, is "1". It is opened only when gate control signal WC2 arrives. Information R in time monitoring information storage memory 7b
2, R3 and R4 are incremented by one every second when the read information R1 of the message weighting memory 7a indicating the presence/absence of message weighting is "1". By repeating this count-up operation, the output information of the time monitoring information storage memory 7b becomes “1”.
11, the AND gate 6b of the memory read circuit 6 is opened, and when the output information R1 of the message waiting memory 7a is "1", the AND gate 6a of the memory read circuit 6 is opened. is opened to obtain the output information R, l of the memory read circuit 6, and this output information R
l, is sent to the communication path control circuit 4. That is, the memory address counter 8 is operated periodically, the contents of the message waiting memory circuit 7 are read in order, and this read information is monitored by the memory read circuit 6, and the above-mentioned conditions, that is, the message waiting memory 7a are monitored.
The output information “111” of the time monitoring information storage memory 7b and the output information “111” of the time monitoring information storage memory 7b are stored in the message waiting storage circuit 7.
When the information is read out from the address, the communication path control circuit 4 is activated. When the communication path control circuit 4 is activated, the contents of the memory address counter 8 are simultaneously sent to the communication path control circuit 4 as memory address information MA.

The memory address information MA sent from the memory address counter 8 to the call path control circuit 4 is transmitted to the switching network 2 of the extension telephone 1 which is the extension registered for message waiting and is about to notify of message waiting. means line-side accommodation position information. On the other hand, the activated call path control circuit 4 connects the switching network 2 between the empty call signal trunk 3a accommodated in the trunk section 3 and the extension telephone 1.
The empty channel 2a is selected, and the communication path switch (not shown) of the channel 2a is closed.

When the call path switch of the switching network 2 is closed, the extension telephone 1 is connected to the ring signal trunk 3a via the channel 2a of the switching network 2, and the ring signal is transmitted from the ring signal trunk 3a to the extension telephone. 1 and the bell of extension telephone 1 rings. When a person who knows that the bell is ringing answers the extension telephone 1, this response is detected by the calling signal trunk 3a, and the calling signal trunk 3a activates the communication path control circuit 4. The activated call control circuit 4 selects the empty notification trunk 3b, and
Furthermore, an empty channel 2b of the switching network 2 between the extension telephone 1 and the notification trunk 3b is selected, and a communication path switch (not shown) of this channel 2b is closed. When the communication path of channel 2b is closed, extension telephone 1 sends notification trunk 3b to switching network 2.
is connected via channel 2b of notification trunk 3b.
You can listen to messages from the extension telephone 1. At this time, the communication path control circuit 4 restores the calling signal trunk 3a and opens the communication path switch corresponding to the channel 2a of the switching network 2. After the extension telephone 1 registered for message waiting responds, the communication path control circuit 4 sends a reset signal RS to the memory writing circuit 10.

The memory write circuit 10 is reset by the reset signal RS, and writes information of "0" into the message weighting memory 7a of the message weighting storage circuit 7 through the first memory write gate circuit 11. The information in the time monitoring information storage memory 7Btc6OOOl is written, and the message waiting registration for the extension telephone 1 is canceled.Also, while the extension registered for message waiting is ringing, the time monitoring circuit 5 monitors the ring duration time. However, if the extension does not respond after a predetermined period of time has elapsed, the call to that extension is interrupted, and the call is made again after a predetermined period of time has elapsed.

Therefore, the number of devices in the call signal trunk 3a can be reduced, and the channel acquisition time of the switch network 2 can be reduced. Although message weighting for one extension was described in the above embodiment, it is clear that message weighting for a plurality of extensions may be performed simultaneously in the present invention.

In addition, although the case has been described in which registration and cancellation of message weighting are performed by operations from the central office line relay board 9, a dedicated operation console or operation panel for registering and canceling message weighting may also be used. This may be done using a dedicated operating table or control panel.
Further, in the above-described embodiment, a case has been described in which a ringing signal is used as a means for calling an extension registered for message waiting, but it is clear that any audible signal other than the ringing signal may be used in the present invention. Furthermore, in the embodiment, when an extension registered for message waiting is called and answered, the notification trunk 3
In the present invention, when the extension responds, the operator of the central office line relay stand 9 is called and the message is heard from the operator of the central office line relay stand 9. Alternatively, a person at the front desk of the hotel or the like may be called and the message may be heard from that person. As explained above, the present invention allows extensions registered for message waiting to be called at regular intervals, so that the standard functions of the central control circuit of the exchange can be effectively used, so that a circuit dedicated to message waiting can be used. It is possible to obtain a message weighting control device that is economical and requires less circuit mounting space.

Further, according to the present invention, since the lamp is lit like a telephone with a message lamp, high voltage is not required, and it is easy to integrate the electronic circuit, and the display is audible instead of visible as in conventional message waiting. Therefore, it is possible to prevent the presence of a message from being overlooked, and a mechanically superior message weighting control device can be obtained.

[Brief explanation of drawings]

The drawing is a block diagram showing an embodiment of the message weighting control device according to the present invention. 1... Extension telephone, 2... Switching network, 3... Trunk section, 3a...
... Calling trunk, 3b ... Notification trunk, 4 ... Call path control circuit, 5 ... Time monitoring circuit, 6 ... Memory reading circuit ,7...
...Message weighting memory circuit, 8...
-Memory address counter, 10...Memory write circuit, 11...First memory write gate circuit, 12...Memory write gate control circuit, 13.
. . . Memory read gate circuit, 14 . . . Memory rewrite control circuit, 15 . . . Second memory write gate circuit.

Claims (1)

[Claims] 1. In a message waiting control device which is equipped with a message information transmission circuit that notifies an automatic exchange that there is a message, and which transmits the message to a corresponding extension of the automatic exchange, the message waiting information is transmitted to a corresponding extension of the automatic exchange. a message waiting storage means for storing information on the presence or absence of message transmission to the extension and time counting information of a paging cycle; a memory writing means for registering the message waiting information in the message waiting storage means; a memory reading means for reading out the message waiting information registered in the message waiting storage means; and a memory reading means for reading out the message waiting information registered in the message waiting storage means; A time monitoring means for monitoring a predetermined calling duration time for the extension through a communication path control means for controlling connection of message transmission, and a calling means for audibly calling the extension in which the message waiting has been registered. A message waiting control device in an automatic switchboard, characterized in that: