JP3183903B2 - Exchanges and exchange systems - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a plurality of private branch exchanges (P
In particular, the present invention relates to a private branch exchange network constructed by connecting BX) with a dedicated line, and more particularly to a system for switching and controlling a holding tone to be transmitted to a calling terminal when a receiving terminal requests a hold of a line after a call connection process. .

[0002] After responding to an incoming call, a call path (line) may be held for replacement of a call partner or transfer to another extension. In this case, in order to make the caller recognize that the call is on hold, it is common to send a hold tone to the caller at the exchange accommodating the receiver.

[0003] In recent years, with the diversification of services and the like, services that use not only mere signal tones but also melodies and messages and make effective use of the waiting time of callers on hold have been implemented. In addition, the type of caller tone (eg, employee, customer, etc.) is changed by making the type of hold tone transmitted for a call from an extension in the self-switched network and a call from the public network (external line) different. In addition, services that provide music on hold adapted to each of these services are also being provided.

[0004]

2. Description of the Related Art In order to realize the above-mentioned service, the following method has conventionally been adopted.

That is, when an incoming call is received from an internal line or an external line, the exchange detects whether the incoming line is from an internal line or an external line based on the physical accommodation position of the incoming line. When a hold request is received from the receiving terminal after the call connection, a holding tone of a corresponding type is transmitted to the calling telephone terminal based on the detected line type.

[0006] In recent years, the private branch exchange network has been increasing in size, and legal restrictions on interconnection with public lines have tended to be eased. Accordingly, in a private branch exchange network in which a plurality of private branch exchanges are connected by a dedicated line, a call arriving from one public line to one private branch exchange is automatically transferred to another private branch exchange via the dedicated line. Services are now generally available.

[0007] In this case, as described above, the private branch exchange where the call first arrives from the extension or the outside line can recognize whether the call is from the outside line or from the extension line. In other private branch exchanges, since this call is sent via a dedicated line, it can be recognized as an incoming call from a dedicated line, but cannot recognize whether it is an incoming call from an outside line or an incoming line.

Therefore, conventionally, in the case of an incoming call from a dedicated line, either a hold tone corresponding to an extension or an outside line or a hold tone corresponding to a dedicated line is transmitted to a calling terminal. .

[0009]

As described above, a call transferred via a plurality of exchanges in a private branch exchange network is transmitted from an external line or from an internal line in the exchange accommodating the terminating terminal. Cannot be determined, and there is a problem that it is not possible to transmit an appropriate hold tone corresponding to an outside line or an inside line.

In order to solve this problem, a dedicated line for transferring a call from an external line and a dedicated line for transferring a call from an internal line are physically independent from each other. A method of recognizing this and transmitting a corresponding hold tone is known, but this method has a problem in that efficient operation of a dedicated line cannot be achieved.

The present invention has been made in view of such a point, and it is an object of the present invention that a call transferred via another private branch exchange is transferred to a first line type ( extension ).
Or from the second line type ( outside line ) without hindering the efficient operation of the dedicated line,
An object of the present invention is to make it possible to selectively transmit a corresponding holding tone to a calling terminal.

[0012]

FIG. 1 is a block diagram showing the principle of the present invention.

A function for accommodating a plurality of lines including an extension line, an outside line or both of them and transmitting / receiving transmission terminal information (telephone number of the transmission terminal and other necessary information regarding the transmission terminal) to / from another exchange. In a telephone exchange network constituted by connecting a plurality of exchanges provided by a dedicated line, each exchange is configured as follows.

That is, a line type detection unit 1 for detecting a line type indicating the type of line on which a call arrives based on the physical accommodation position of the line, and a hold tone type stored in advance as data corresponding to the line type. The corresponding holding tone type is extracted from the holding tone type storing unit 2 based on the input line type and the holding tone type storing unit 2 based on the input line type. A hold tone control unit 4 for switching / controlling a hold tone to be transmitted, and when activated, extracts a line type from calling terminal information from another exchange, outputs the line type to the hold tone control unit 4, The holding sound control unit 4
And a line type setting unit 6 which, when activated, sets the line type detected by the line type detection unit 1 in the information of a terminal to be transmitted to another exchange.

[0015] The holding control unit 4, the line type extracting unit 5, or the line type setting unit 6 is provided with an activation control unit 7 for selectively activating according to the case. Activation control unit 7
If the incoming call is to be transferred to another exchange and the line type detected by the line type detection unit 1 is not a dedicated line, the line type setting unit 6 is activated,
If it is a dedicated line, the line type setting unit 6 is not activated. On the other hand, if the call is to be terminated at the extension of the local exchange, the following processing is performed. That is, after receiving an incoming call to the extension terminal 3 of the own exchange, when there is a hold request from the receiving terminal 3, if the line type detected by the line type detection unit 1 is not a dedicated line, the line type is detected. The line type is output to the holding tone control unit 4, and the holding tone control unit 4 is activated. If the line is a dedicated line, the line type extracting unit 5 is activated.

[0016]

In the case where call connection processing is performed via a plurality of exchanges, the exchange which has first arrived from an extension or an outside line is the transfer source exchange, the exchange accommodating the extension to be terminated is the transfer destination exchange, and the transfer source exchange is If there is another exchange in the path from the destination exchange to the transfer destination exchange, the other exchange will be described as a relay exchange.

First, when an incoming call is detected in the transfer source exchange, the line type detecting unit 1 detects the line type of the incoming line. In this case, it is an extension or an extension, and
Since this call is to be transferred to another exchange, the activation type control unit 7 activates the line type setting unit 6, and the line type setting unit 6 sets the detected line type (extension or outside line) in the calling terminal information. Is set, and is transferred to another applicable exchange (a transit exchange in this case) together with the call connection request.

At the transit exchange receiving this, the line type is detected in the same manner as described above. In this case, the line type is a dedicated line, and since this call is to be transferred to another exchange, the line type is not set in the outgoing terminal information by the line type setting unit 6 and the line type is not changed. The call is transferred to the exchange (in this case, the destination exchange) together with the call connection request.

At the transfer destination exchange receiving this, the line type is detected in the same manner as described above (in this case, the line type is a dedicated line). Since this call should be terminated at the extension of the local exchange, a ringing tone is generated and other call connection processing is performed. If there is a hold request from the receiving terminal during a call, the detected line type is a dedicated line, so the activation control unit 7 activates the line type extracting unit 5 and transfers the transmitted calling terminal information. The line type is extracted from. The line type is input to the music on hold control unit 4, and the music on hold control unit 4 extracts the corresponding music on hold type from the music on hold type storage unit 2 based on the circuit type and sends it to the calling terminal 3 based on the music type on hold. The corresponding hold tone is transmitted.

When the transfer source exchange and the transfer destination exchange match, that is, when the line type detected by the line type detection unit 1 is an extension or an outside line, a hold request is made after the call arrives at the extension of the own exchange. If there is, the line type extraction unit 5 is not activated, the detected line type is input to the hold tone control unit 4, and based on this, the corresponding hold tone is transmitted to the calling terminal 3. Can be

As described above, the telephone exchange network is constituted by the exchanges to which the present invention is applied, so that even when a call connection is made via a plurality of exchanges, an incoming call from an outside line and an incoming call from an extension can be received. , The holding sound to be transmitted can be made different. It should be noted that, unlike the prior art, a dedicated line connecting between the exchanges is separated into a dedicated line for transferring a call from an external line and a dedicated line for transferring a call from an internal line. However, the operation efficiency of the dedicated line is not reduced.

[0022]

DETAILED DESCRIPTION OF THE INVENTION A description will be given based on the drawings, taking as an example a connection process between exchanges using a telephone user part (TUP) of the 7 common channel signaling system.

FIG. 2 shows a private branch exchange (P) to which the present invention is applied.
FIG. 1 is a diagram showing a schematic configuration of a private branch exchange network configured by BX). This private branch exchange network is no. It is configured by applying the 7 common line signaling method.

Referring to FIG. 1, reference numerals 11 and 12 denote private branch exchanges. These exchanges 11 and 12 respectively accommodate a plurality of extensions 13 and an outside line 14 which is a connection line to a public network. The exchanges 11 and 12 are No. 7 are connected to each other by a communication line 15 and a signal line 16 controlled by a common line signaling system, and each of the exchanges 11 and 12 sends a holding tone such as a signal tone, a melody, a message, and the like to the calling terminal when holding. A plurality of hold sound transmission devices 17 are accommodated.

FIG. 3 is a block diagram showing a hardware configuration of the above exchange 11 or 12. In FIG.
Is a communication path unit (NW), 22 is a communication path control unit (CM), 2
3 is a central processing unit (CC), 24 is a storage unit (MM), 25
Is a common line signal control unit (CSE), 26 is a data communication control unit (DCC), 27 is a maintenance terminal (MC), and 28 is a common bus. Reference numeral 29 denotes a subscriber circuit control unit (RSM / SSM) for controlling the extension subscriber control circuit 30.

FIG. 4 is a diagram showing an example of data relating to the holding tone type set in a part of the storage unit 24 (corresponding to the holding tone type storage unit 2 in FIG. 1). That is, in this embodiment, the hold type "SHST" for the line type "extension", the hold type "CHST" for the line type "outside line", and the hold type "CHST" for the line type "dedicated line". “PHST” is set and held in advance.
This data can be arbitrarily changed using the maintenance terminal 27 as described later.

FIG. 5 is a flow chart showing the processing when the exchange 11 or 12 receives a call and when a hold request is received. The numbers in parentheses attached to the respective steps correspond to the numbers of the respective parts in FIG.

When a call connection request arrives at the exchange, the exchange performs a predetermined incoming call process (step ST1). In other words, the exchange manages the state of each line, etc., and detects the incoming call, and after receiving the incoming terminal information including the incoming terminal telephone number and the outgoing terminal information including the outgoing terminal telephone number in the call connection request. In this case, the information is temporarily stored in the storage unit 24, or processing such as newly generating transmission terminal information is performed.

During or after the incoming call process, whether the incoming call is from an extension, an outside line, or a dedicated line is determined by the physical It is detected based on the target accommodation position (ST2).

Next, based on the incoming terminal telephone number of the incoming terminal information stored in the storage unit 24, it is determined whether the call is to be received at the extension accommodated in the own exchange or to be transferred to another exchange. A decision is made (ST3).

If the call is to be transferred to another exchange, the detected line type is determined (ST4). If the call is an extension or an outside line, a call to be transferred together with a call connection request to another exchange is made. The detected line type (extension or outside line) is added to the terminal information (ST5), and a predetermined call transfer process is performed (ST6). If it is determined in ST4 that the detected line type is a dedicated line, the process proceeds to ST6 without executing ST5.

If it is determined in ST3 that the call is to be terminated at the extension housed in the local exchange,
A process for a normal call including a process of generating a ringing tone at the receiving terminal is performed (ST7). After receiving a response from the called terminal, if a hold request is received from the called terminal (ST8), the type of the detected line is determined (ST9). Based on the line type, the data related to the held tone type is searched in the storage unit 24, and the held tone type corresponding to the line type is extracted (ST10). If the detected line type is an extension, the hold tone type “SHST” is extracted, and if the detected line type is an external line, the hold tone type “CHST” is extracted.

If it is determined in ST9 that the detected line type is a dedicated line, it is determined whether the line type is set in the corresponding outgoing terminal information stored in the storage unit 24 ( ST11) If not set, the process proceeds to ST10. Since the line type in this case is a dedicated line, in ST10, the hold tone type “PHST”
Is extracted.

In ST11, if the line type is set in the corresponding outgoing terminal information, the line type is extracted from the outgoing terminal information (ST12), and based on the extracted line type, in the same manner as in ST10. A corresponding hold tone type is extracted from the data on the hold tone type in the storage unit 24 (ST13).

Next, the holding sound transmitting device 17 corresponding to the holding sound type extracted in ST10 or ST13 is captured, and the holding sound transmitting device 17 is activated (ST14) to correspond to the calling terminal. A hold tone is transmitted. Thereafter, when a hold release request is received from the receiving terminal (ST15), the hold sound transmission device 17 is stopped (S15).
T16), and return to ST7.

Each private branch exchange 11, 1 in this embodiment
2 is provided with a data change / display processing unit as shown in FIG. 6, and by inputting a predetermined command or the like from the attached maintenance terminal 27, the setting contents of the data relating to the holding tone type in the storage unit 24 are changed. The settings can be changed arbitrarily or displayed for confirmation. FIG. 7 is a diagram showing a specific example of the data change process. Referring to FIGS. 6 and 7,
The data change / display processing will be described.

Command corresponding to data change from maintenance terminal 27, line type to be changed (in this case, an outside line)
And the changed hold tone type (in this case, the change from “CHST” to “PHST”) is input,
The change request receiving unit 31 receives this, the request content analyzing unit 32 analyzes the content of the input command, and the content changing unit 33 determines the hold tone type corresponding to the corresponding line type in the storage unit 24 in FIG. Rewritten as shown. If the rewriting has been performed normally, the change completion notifying section 34 displays the fact on the CRT of the maintenance terminal 27.

On the other hand, when a command corresponding to data display is input from the maintenance terminal 27, the display request receiving unit 35 receives the command, the request content analyzing unit 36 analyzes the content of the input command, and reads the content. 37 reads out all the data related to the holding tone type in the storage unit 24,
The content output unit 38 displays the read data on the held tone type on the CRT of the maintenance terminal 27.

In the above embodiment, each exchange 1
Although it is described that the lines 1 and 12 accommodate only internal lines, external lines and dedicated lines, the present invention is also applied to a case where other types of lines are accommodated, for example, a line connecting to a relay console. Needless to say, this is possible.

[0040]

As described in detail above, the present invention relates to a switching system which accommodates an originating extension or receives a call connection request from a public line first, and selects a line type (from an extension or from a public line). Is added to the transmitting terminal information, and when the exchange accommodating the receiving terminal recognizes the incoming call from the dedicated line, the line type is extracted from the transmitting terminal information, and based on this, the transmitting terminal is extracted. Is configured to switch and control the hold tone sent to the transmitting terminal even if the call connection is made via a plurality of exchanges without hindering the efficient operation of the dedicated line. This makes it possible to make the hold tone transmitted to the extension line in the own switching network different from that for the public line.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the principle configuration of the present invention.

FIG. 2 is a diagram showing a schematic configuration of a private branch exchange network in an embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a private branch exchange in the embodiment of the present invention.

FIG. 4 is a diagram showing an example of data relating to a held sound type in the embodiment of the present invention.

FIG. 5 is a flowchart showing a process at the time of an incoming call and at the time of receiving a hold request in the embodiment of the present invention.

FIG. 6 is a diagram illustrating a configuration of a data change / display processing unit according to the embodiment of the present invention.

FIG. 7 is a diagram showing a specific example of a data change process in the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Line type detection part 2 Hold tone type storage part 3 Sending terminal 4 Hold tone control part 5 Line type extraction part 6 Line type setting part 7 Activation control part

Continuation of the front page (56) References JP-A-63-52550 (JP, A) JP-A-2-135960 (JP, A) JP-A-2-231852 (JP, A) JP-A-3-6995 (JP) JP-A-2-166997 (JP, A) JP-A-62-250793 (JP, A) JP-A-58-146165 (JP, A) JP-A-64-37191 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 3/42-3/58 H04Q 3/58-3/62

Claims (3)

(57) [Claims] 1. A switch for accommodating a plurality of types of lines and having a function of transmitting and receiving calling terminal information to and from another switch, a line for detecting a line type indicating a type of a line on which a call arrives.
A type detecting unit, the extracting said line type from the calling terminal information from another telephone exchange, and outputs the line type based on the results of the extracted times
A line type extraction unit , a hold tone type storage unit in which a hold tone type is stored in advance as data corresponding to the line type, and a line type output from either the line type detection unit or the line type extraction unit based on, the music-on-hold type Symbol
Extract the holding tone type corresponding from 憶部, exchange, characterized by comprising a holding tone control unit for switching and controlling the holding tone on the basis of the music on hold type. 2. An exchange having a function of accommodating a plurality of types of lines and having a function of transmitting and receiving calling terminal information to and from another exchange. And a line type detecting unit for detecting the line type based on the physical accommodation position and the line type detection when the call is to be transferred to another exchange.
The line type detected by the output unit is the first or second line type
, The first or second line type is
Set the information and transfer it to another exchange, and detect the line type
When the line type detected by the section is the third line type
Is a calling terminal including the received first or second line type.
A line type setting unit for transferring information to another exchange. 3. An exchange system accommodating a plurality of types of lines and having a function of transmitting and receiving calling terminal information to and from another exchange, a line for detecting a line type indicating a type of a line on which a call arrives.
A type detecting unit, according to a predetermined condition, times for setting the detected line type in the line classification detection unit to the originating terminal information to another telephone exchange
And line type setting unit, the extracting said line type from the calling terminal information from another telephone exchange, times of outputting the line type based on the results of the extracted
A line type extraction unit , a hold tone type storage unit in which a hold tone type is stored in advance as data corresponding to the line type, and a line type output from either the line type detection unit or the line type extraction unit based on, the music-on-hold type Symbol
Extract the corresponding holding tone type from 憶部, switching system, characterized in that it and a holding tone control unit for switching and controlling the holding tone on the basis of the music on hold type.