JPS6153863A - Private branch electronic exchange - Google Patents

Abstract

PURPOSE:To transmit clearly a variety of service contents by providing a sound synthesizing trunk, writing a message at a memory part and making the message freely selected through the indication of a control part. CONSTITUTION:When subscribers A and B execute the camp-on operation with use of communications links 41 and 42 and a subscriber in the midst of calling also executes said operation with respect to the subscriber A, this operation is detected in a subscriber circuit control part 31 and informed to a common control part 32, whereby the link connection exchange to a sound synthesizing trunk 50 is carried out. On the other hand, when the common control part 2 indicates the transmission of a camp-on service to a trunk control part 51, it indicates a message memory part 52 to select the camp-on service and simultaneously indicates a sound transmitting part 53 to transmit the message to a sound mixing part 54. In case of three minutes' notice service, its three minutes' notice message is informed as a necessary message through a signal line 60.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to private electronic branch exchanges, and more particularly to those which perform predetermined information services to a subscriber during a call.

Conventional configuration and its problems FIG. 1 shows the main parts of a conventional private electronic exchange.

(A) is subscriber A, (B) is subscriber B, (F) is subscriber F, (C) is the interrupt sound transmission trunk, (D) is the common control unit, and (E) is the communication path device. , the interrupt sound sending trunk (C) and the communication path device (E) operate under the control from the common control unit (D), and the interruption sound sending trunk (C) generates and sends the interruption sound, and the communication path device (E) has the role of providing communication paths between subscribers and trunks. In FIG. 1, it is assumed that A and B are talking through end points a and b in the communication path device and a communication link Q1. When F dials A in this state, A is busy, so the busy tone is F.
sent to. Here, when F performs a certain dial operation (hereinafter referred to as camp-on), the common control unit (D) detects this and disconnects the call link Q to the call path device (E) at the same time as a - It instructs to connect the communication link Q and 2 between C and instructs the interrupt tone sending trunk (C) to generate a camp-on tone. Through this series of operations, A hears the camp-on tone and knows that someone is waiting for his call to end. On the other hand, the camp-on tone is a short burst tone, and the interrupt tone sending trunk (C) is restored after being sent for a certain period of time (usually about 100 to 200 milliseconds). Common control section (
At the same time as the interrupt sound sending trunk (C) is restored, D) again instructs the communication path device (E) to disconnect the communication link Q2 and control the connection of the communication link Ql, thereby returning to the communication state between A and B. .

However, since such a configuration has only one type of interrupt sound, it is no longer possible to support various call interrupt services that have been increasing in recent years. In other words, information that you want to notify by sending an interrupt tone to a subscriber who is on a call includes, in addition to the above-mentioned camp-on, for example, the 3-minute service that indicates that 3 minutes have elapsed in a call, and the information that a relay There are many types of interrupt warning sounds when interrupting services, and as mentioned above, there is a problem in that if there is only one type of interrupt sound, the subscriber cannot distinguish which service the interrupt sound is for.

In addition, as a means to avoid such problems, it may be possible to change the frequency of the interrupt sound or the number of times it is transmitted depending on the service content, but such a method would make it difficult for subscribers to distinguish between the two. , it is considered inappropriate to notify the service content using an interrupt sound.

OBJECTS OF THE INVENTION An object of the present invention is to provide a private electronic branch exchange that can transmit various service contents to a subscriber during a call more clearly than before.

Structure of the Invention The private electronic exchange of the present invention includes an interrupt service message storage section in which messages corresponding to the content of the information service are written, and a necessary message is selected from the interrupt service message storage section according to an instruction from an external control device. The present invention is characterized in that a voice synthesis trunk is provided, which is composed of a control section for sending out a message, and a voice mixing section for superimposing a voice synthesis message signal selectively sent out by the control section on a communication path in progress.

Description of examples Hereinafter, one embodiment of the present invention will be described based on FIG. 2.

=3- In FIG. 2, (20), (24), and (28) are the telephones of subscribers A, B, and C, which are connected to the respective subscriber interface circuits (21, 25, and 29).

Subscriber interface circuit (21) (25) (2
9) The communication system is a hybrid circuit (22) (26)
(30), 2-wire 4-wire conversion is performed and the communication path device (
40). The subscriber interface circuits (21) (25) (29) are also connected to the control units (23) (27) (31) of each subscriber circuit, and receive loop signals (call origination, call termination) from each telephone. , dial, etc.). The loop information detected here is sent to the common control section (32) of the exchange, and exchange control is executed according to this information. (33) is a communication path control unit, which controls communication path equipment (40) according to instructions from the common control unit (32).
Form a call link within. (41)'
(42) is a call link between subscribers A and B, and if this link is formed, calls between subscribers A and B are possible. (43) (44) (45) (46) are call links that connect subscribers A and B with the voice synthesis trunk (50), and when an interrupt message is being sent, the call link (43)
(44) (45) (46) are formed. (51) is a control section of the speech synthesis trunk-4 (50), which is connected to the common control section (32), the message storage section (52), and the voice transmission section (53).

(54) is an audio mixing section. (60) is a start signal line, (61) is a message selection line, and (62) is an end signal line. These signal lines (61) and (62) are connected to the common control section (32) and the voice synthesis trunk control section ( 51)
are connected.

Next, the above configuration will be explained in detail based on its operation.

Here, we will explain the case where the camp-on service is realized as an example. If subscriber A and subscriber B are already on a call using call links (41,) (42) and subscriber C performs a camp-on operation for A, the camp-on operation from C will be performed by the subscriber. It is detected by the subscriber circuit control section (31) through the interface (29), and this is notified to the common control section (32). The common control unit (32) instructs the communication path control unit (33) to connect communication links (41) and (42).
is disconnected and the link connection is changed to the speech synthesis trunk (50). With this operation, the communication paths of subscribers A and B (hybrid circuits (22) (26)) are connected to the voice synthesis trunk (50) through communication links (43) to (46).
). On the other hand, the common control section (32) also instructs the trunk control section (51) to send a camp-on service message through the control lines (60) and (61). Here, a transmission start signal is sent to the signal line (60), and a signal containing information indicating camp-on message selection is sent to the signal line (6I). When the voice synthesis trunk control unit (51) receives this instruction, it instructs the message storage unit (52) to select the camp-on message, and at the same time sends an instruction to the voice output unit (53).
to send the message sent from the message storage section (52) to the audio mixing section (54). As a result of this operation, the camp-on message is read out from the message storage section (52) and the camp-on message is read out from the message storage section (52).
3) to the audio mixing section (54), where it is sent to the subscriber B's telephone (24).
) is mixed with the voice sent through the call link (45) and sent to subscriber A through the call link (44).
is sent to the telephone (20). The message transmission level is set to an understandable level. As a result, subscriber A can know that a camp-on has been placed on him while continuing the call between A and B.

The voice synthesis trunk control section (51) learns of the end of message transmission from a signal from the message storage section (52), and notifies the common control section (32) through the end signal line (62). When the common control unit (32) receives the end signal, it instructs the call path control unit (33) to connect the call links (43) to (
46) and the original call link (41,) (42)
is re-established, and the original A-B call is restored.

Next, a case will be described in which a three-minute notice service is implemented. This service notifies you that 3 minutes have passed every time the call time exceeds 3 minutes, and in this embodiment, a voice synthesized message is used to notify you that 3 minutes have passed.

In FIG. 2, the common control unit (32) starts time measurement at the same time as the start of the call between A and B, and when 3 minutes have elapsed, the call link (41) (4
2) to the call links (43) to (46) and connect it to the voice synthesis trunk (50), and at the same time connect the signal line (61) to the voice synthesis trunk (50).
), it is notified that the required message is the message 7-1 message 3 molecules ago. The message “3 minutes have passed” is stored in the message storage unit (52),
A message is sent to subscriber A on the originating side through the same route as above, and as soon as the message ends, the original call between A and B is resumed.

As can be seen in the above two service examples, different voice messages for different service requests in the same configuration can be sent to the subscriber without interrupting the call in progress.

In each of the above embodiments, when an interrupt service request is generated for a subscriber who is currently on a call, the existing call is pulled into the speech synthesis trunk and the voice message is immediately mixed. It may also be configured to send a sound (burst-like tone) from the voice synthesis trunk control unit (51) to give an interrupt notice.

Furthermore, in both the camp-on service and the 3-minute notice service, a voice message is sent to only one of subscribers A-H who is on a call, but for example, during a call between A and B, C When B overrides B, an interrupt sound and a voice message to the effect of r override j are first sent to A and B via the voice trunk (50).
, and then automatically puts A on hold and forms a B-C call link.

Effects of the Invention The private electronic exchange of the present invention includes an interrupt service message storage section in which messages corresponding to the content of the information service are written, and a necessary message is selected from the interrupt service message storage section according to an instruction from an external control device. The following effects can be obtained by providing a control section for transmitting the signal and a voice mixing section for superimposing the voice synthesized message signal selectively transmitted by the control section on the communication path in progress.

(a) Since a voice synthesis trunk is used, it is possible to make the subscriber clearly recognize the specific service content, rather than just an interrupt sound.

(b) By superimposing a message to be sent at a low level on a call in progress within the trunk, the service content can be conveyed without interfering with the call.

(c) Since a large number of messages are written in the service message storage unit and can be selected by instructions from the control unit, various messages can be sent to various services.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the main parts of a conventional private electronic exchange, and FIG. 2 is a block diagram of the main parts of an embodiment of the private electronic exchange of the present invention.

Claims (1)

[Claims] 1. An interrupt service message storage section in which a message corresponding to the content of the information service is written; a control section that selects and sends a necessary message from the interrupt service message storage section according to instructions from an external control device; A private electronic exchange equipped with a voice mixing section that superimposes a selectively transmitted voice synthesized message signal onto a communication path in progress.