JP2002010312A - Telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly transmit caller's situation to the other party when connected to a network having services to connect a call without notifying the identification number of a caller. SOLUTION: In a telephone device connected through the outside lines 5-1 to 5-m to ISDN network having the service of connect a call without notifying the identification number of a caller when called, the device comprises extension telephones 2-1 to 2-n displaying a call when called by the service through outside lines 5-1 to 5-m, a detecting means 8 detecting the busy condition of this extension telephones 2-1 to 2-n, and a call control means 9 changing the kind of message to sand back to the ISDN network in response to a detected result by the detecting means 8 when called by the service.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone device having an exchange function such as a key telephone device and a private branch exchange.

[0002]

2. Description of the Related Art As shown in FIG. 5, a key telephone apparatus has a configuration in which a plurality of extension telephones 2-1 to 2-n are connected to a main apparatus 100. Main device 100 includes extension circuits 3-1 to 3-n, switch 4, and external circuits 6-1 to 6-m.
And a control unit 70.

Here, external line circuits 6-1 to 6-m are connected to I
It is connected to an ISDN network via external lines 5-1 to 5-m which are SDN dial-in lines. When an ISDN dial-in line is accommodated, a dial-in incoming call service in which a called number is notified when an incoming call is received from the ISDN network;
A global incoming call service is provided in which a called number is not notified at the time of an incoming call from a DN network. For a global call,
A representative telephone number 585-1000 is given to the outside line 5-1. A representative telephone number 585-2000 is given to the outside line 5-m.

[0004] The representative telephone number 585 is connected to the outside line circuit 6-1.
An extension telephone 2-n to which a telephone number of 585-2222 is assigned is set as an extension terminal for performing an incoming call display (ringing sound) when there is an incoming call by -1000. .. 585-1 as an extension terminal for displaying an incoming call (ringing sound) when there is an incoming call at the representative telephone number 585-2000 in the outside line circuit 6-m.
An extension telephone 2-1 to which a telephone number of 111 is assigned is set.

In such a key telephone apparatus, the control unit 70 operates in accordance with the program of the flowchart shown in FIG. Here, an incoming call to the outside line circuit 6-1 will be described.
The control unit 70 detects whether a global incoming call has been made to the external line circuit 6-1 (S1). If there is a global incoming call, it detects a destination (an extension terminal to be displayed) for the external line (S2), It is detected whether the destination is set (S3).

In the above, if the destination is not set, a disconnection message is returned (S4). If the destination is set, a call message is sent out, and processing for a call is performed (S5).

[0007]

In the example of FIG. 5,
When a call is made to 585-1000 via the ISDN network, the ISDN network receives a call via the outside line 5-1. Here, since the extension telephone 2-n is set as the destination, the control unit 70 returns a call message to the ISDN. The ISDN network receives this and returns a ring back tone RBT to the transmission source. The operation of the control unit 70 to return the call message to the ISDN network is performed even when the extension telephone 2-n is busy as long as the destination is set as the destination.
At the transmission source, the other party hears the ringback tone regardless of whether the other party is busy and there is a problem that the situation of the other party cannot be properly grasped.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the conventional telephone device, and has as its object to provide a network having a service of receiving a call without notifying the identification number of a destination terminal upon receiving a call. It is an object of the present invention to provide a telephone device capable of properly transmitting the situation of the user to the other party even when the telephone device is connected to the telephone.

[0009]

According to the present invention, there is provided a telephone apparatus which is connected via an external line to a network having a service for receiving a call without notifying an identification number of a destination terminal upon receiving a call. An extension terminal for displaying an incoming call when an incoming call is received by the service via an outside line; a detecting means for detecting a use state of the extension terminal; and detecting the incoming call by the service via the outside line. Call control means for switching a type of a message returned to the network in accordance with a detection result by the means. Thereby, when an incoming call is received by the service via an outside line, the type of a message returned to the network is switched according to the use state of the extension terminal,
A tone or the like corresponding to the use state of the extension terminal is returned to the transmission source.

In the telephone apparatus according to the present invention, the call control means returns a disconnection message to the network when the detection means detects that the extension terminal is busy. It is characterized by the following. by this,
When the extension terminal is busy, a disconnection message is returned to the network, and a busy tone or the like can be returned to the transmission source.

Further, in the telephone device according to the present invention, the call control means may control the network when the extension terminal for displaying the incoming call is not set when there is an incoming call by the service via the outside line. To send a disconnection message. As a result, a disconnection message is returned to the network when the extension terminal for displaying the incoming call is not set.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A telephone device according to the present invention will be described below with reference to the accompanying drawings. In each drawing, the same components are denoted by the same reference numerals, and redundant description will be omitted. Here, a key telephone device will be described as a telephone device, but a private branch exchange or the like is similarly configured. FIG. 1 shows a key telephone apparatus according to an embodiment of the present invention. The key telephone device includes a main device 1 and extension telephones 2-1 to 2-1.
2-n.

The main unit 1 includes extension telephones 2-1 to 2-n
3-1 to 3-n, switch 4, and external circuit 6-1 connected to external lines (station lines) 5-1 to 5-m
6-m, and a control unit 7 are provided. In the above,
The switch 4 controls the extension circuits 3-1 to 3-1 under the control of the control unit 7.
3-n, or between extension circuits 3-1 to 3-
n and the external line circuits 6-1 to 6-m. The external circuits 6-1 to 6-m are connected to the ISDN network via external lines 5-1 to 5-m, which are ISDN dial-in lines. If an ISDN dial-in line is accommodated, I
A dial-in incoming call service in which the called number is notified when an incoming call is received from the SDN network, and a global incoming call service in which the called number is not notified when the incoming call is sent from the ISDN network are provided.

Destinations are set in the external circuits 6-1 to 6-m. More specifically, the extension terminal 585-22 performs an incoming call display (ringing of a ringing tone) when an incoming call is received by the representative telephone number 585-1000 in the outside line circuit 6-1.
An extension telephone 2-n to which 22 telephone numbers are assigned is set,... (Omitted)... Incoming call display when there is an incoming call with the representative telephone number 585-2000 on the outside line circuit 6-m. The extension telephone 2-1 to which the telephone number 585-1111 is assigned is set as an extension terminal that performs (ringing of a ringing tone). MF under the control of the control unit 7
The tone can be transmitted. External circuit 6-1 to 6-
m has an incoming call detection function, and when there is an incoming call, notifies the control unit 7 to that effect.

The control unit 7 includes extension telephones 2-1 to 2-n
Detecting means 8 for detecting the use state of external lines 5-1 to 5-
When an incoming call (global incoming call) is received by a service that receives an incoming call without notifying the identification number of the destination terminal when receiving an incoming call from the ISDN network via m, it is returned to the ISDN network according to the detection result by the detecting means 8. Call control means 9 for switching the type of message to be transmitted.

In such a key telephone apparatus, the control unit 7 operates in accordance with the program of the flowchart shown in FIG. The control unit 7 detects whether a global incoming call has been made to the external line circuit (S11). If there is a global incoming call, the control unit 7 detects a destination (an extension terminal to be displayed for incoming calls) corresponding to the external line (S1).
2) It is detected whether the destination is set (S)
13).

In the above case, if the destination is not set, a disconnection message is returned (S14). If the destination is set, the state of the destination is detected (S14).
15) It is detected whether the destination is busy (S1).
6).

If the extension telephone of the destination is busy, a disconnection message is returned (S17). If the extension telephone is not busy (empty), a call message is sent out and the call is forwarded. (S18).

Next, an operation when a global incoming call is made to the external line circuit 6-1 will be described. As shown in FIG. 3, when a call to the telephone number 585-1000 is made to the ISDN network, the ISDN network that has received the call performs global termination via the corresponding outside line 5-1. With this incoming call, the destination is not notified.

The control unit 7 receives the notification of the global incoming from the external line circuit 6-1, and detects whether or not the extension telephone corresponding to the incoming call display destination is set. Here, since the extension telephone 2-n (telephone number 585-2222) is set, the state is detected. In the example shown in FIG. 3, since the telephone is empty, the control unit 7 calls the extension telephone 2-n via the extension circuit 3-n and sends a call message to the ISDN network via the external circuit 6-1. Send out.

The ISDN network receiving this returns a ringback tone RBT to the source, indicating that a call is being made at the destination.

On the other hand, in the example shown in FIG. 4, a call to the telephone number 585-1000 is made to the ISDN network, and the ISDN network that has received the call makes a global call via the corresponding outside line 5-1. However, the control unit 7
-1 and a notification of a global incoming call is received, and it is detected whether or not the extension telephone corresponding to the incoming call display destination is set. Here, the extension telephone 2-n (telephone number 585-2222)
Is set, and when the state is detected, it is in the busy state.
And sends a disconnection message to the ISDN network via.

The ISDN network receiving this returns a busy tone BT to the source, indicating that the destination is busy. As a result, the caller can take an appropriate action, such as hanging up the call once and calling again.

[0024]

As described above, according to the telephone apparatus of the present invention, a telephone apparatus connected via an external line to a network having a service for receiving a call without notifying the identification number of the destination terminal at the time of the call reception. In the above, when the incoming call is received by the service via the outside line, the type of the message to be returned to the network is switched according to the use state of the extension terminal, and the network responds to the use state of the extension terminal by this message. A tone or the like can be returned to the caller, and comfortable call processing can be performed at the caller.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a key telephone device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the key telephone apparatus according to the embodiment of the present invention.

FIG. 3 is a view showing an operation when the destination is empty in the key telephone apparatus according to the embodiment of the present invention.

FIG. 4 is a view showing an operation when the destination is in a busy state in the key telephone apparatus according to the embodiment of the present invention.

FIG. 5 is a configuration diagram of a key telephone device according to a conventional example.

FIG. 6 is a flowchart showing the operation of the key telephone device according to the conventional example.

[Explanation of symbols]

1 Main unit 2-1 to 2-n
Extension telephone 3-1 to 3-n Extension circuit 4 Switch 5-1 to 5-m Outside line 6-1 to 6-m
External line circuit 7 Control unit 8 Detecting means 9 Call control means

Claims (3)

[Claims] 1. A telephone device connected via an external line to a network having a service for receiving a call without notifying the identification number of a destination terminal when receiving a call, wherein the call is received by the service via the external line. An extension terminal that displays an incoming call, a detection unit that detects a use state of the extension terminal, and, when an incoming call is received by the service via the outside line, to the network according to a detection result by the detection unit. A telephone control unit for switching a type of a message to be returned. 2. The call control means, wherein when the detection means detects that the extension terminal is busy,
2. The telephone device according to claim 1, wherein a disconnection message is returned to the network. 3. The call control means returns a disconnection message to the network when an extension terminal for displaying an incoming call is not set when an incoming call is received by the service via the outside line. The telephone device according to claim 1, wherein: