JPH08265434A - Exchange for isdn - Google Patents

Abstract

PURPOSE: To obtain an ISDN exchange capable of eliminating the necessity of informing a transmitting side of a new sub-address when a receiving side sets up or changes the sub-address. CONSTITUTION: In the case of setting up night telephone service, a user depress an operation button 4 to set up a sub-address for night telephone service and available time capable of utilizing the telephone service. A storage circuit 5 stores the sub-address of the telephone service and the available time set up by the button 4. When an interface circuit 1 receives a transmitting side call setting message from an ISDN line 10 in such a sate, a control circuit 3 checks the receiving time of the message by a clock circuit 6. When the receiving time is within the avaliable time, the circuit 3 checks the existence of a sub- address in the received call setting message. When no sub-address is included, the circuit 3 reads out the sub-address from the circuit 5, adds the sub-address to the call setting message and sends the message to an interface circuit 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN switch which is used by being connected to an ISDN line.

[0002]

2. Description of the Related Art ISDN (Service Integrated Digital Network)
Is built to transmit voice, digital information and more. For ISDN users, digital PBX (Priv
A device such as an ate branch exchange) may be used by connecting to an ISDN line.

The digital PBX is disclosed in, for example, Japanese Patent Laid-Open No. 4-24.
A plurality of terminal devices as disclosed in Japanese Patent No. 7741 are provided, and information is transmitted between terminals installed in one building and with an ISDN line.

[0004]

By the way, when an ISDN exchange is used, a nighttime telephone may be set. At this time, the receiving side sets the sub-address to IS.
It is necessary to set it in the telephone for DN. On the other hand, if the sender does not know the subaddress of the nighttime telephone set on the receiving side, the sender cannot specify the subaddress when using the nighttime telephone.

If the transmitting side transmits without designating the subaddress, all the telephones connected to the exchange ring at the receiving side, and the function of the nighttime telephone cannot be used.

An object of the present invention is to provide an exchange for ISDN which eliminates the above-mentioned drawbacks and which can eliminate the need to notify the sender of a new subaddress when the receiver sets or changes the subaddress. is there.

[0007]

In order to achieve the object, the present invention is connected to an ISDN line,
An interface unit for N lines and a line for transmitting information,
A terminal interface unit that is connected to the terminal and transmits information to and from this terminal, a setting unit that sets a new subaddress and sets the valid time of this subaddress, and a new subaddress and the valid time set by the setting unit. When the storage unit that stores the time, the clock unit that measures the time, and the line interface unit receive the call setting message, the clock unit checks the reception time. If this reception time is within the valid time, the received call setting message There is a control unit for checking the presence or absence of the sub-address in the inside, reading the sub-address from the storage unit if there is no sub-address, adding the sub-address to the call setup message and sending it to the terminal interface unit.

[0008]

According to the present invention, for example, when setting a night-time telephone, the user operates the setting section to set the sub-address of the night-time telephone and the effective time during which the telephone can be used. The storage unit stores the subaddress and the valid time of the telephone set by the setting unit.

In this state, when the line interface unit receives the call setting message on the transmission side from the ISDN line, the control unit checks the reception time of the line interface unit by the clock unit.

If the reception time is within the valid time, the control unit checks the presence or absence of the sub address in the received call setup message. If the sub-address is not included, the control unit reads the sub-address from the storage unit, adds this sub-address to the call setup message, and sends it to the terminal interface unit.

As a result, only the telephone set designated by the subaddress, that is, the telephone set for night use only rings.

[0012]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. The exchange for ISDN is applied to a digital PBX connected to the ISDN line 10. This ISDN exchange has an interface circuit 1 as a line interface unit, an interface circuit 2 as a terminal interface unit, a control circuit 3 as a control unit, an operation button 4 as a setting unit,
The storage circuit 5 is provided as a storage unit, and the clock circuit 6 is provided as a clock unit.

The interface circuit 1 is connected to the ISDN line 10, and the interface circuit 2 is connected to the line 14 in the premises where the exchange is installed. The interface circuit 1 connects the B channel (information channel) 11 of the ISDN line 10 to the interface circuit 2, and the D channel (signal channel) 1 of the ISDN line 10 is connected.
2 is connected to the control circuit 3. Interface circuit 2
Is the B channel 11 from the interface circuit 1,
The D channel 13 from the control circuit 3 is connected to the internal line 14
Connect to.

The B channel 11 of the ISDN line 10 transmits encoded voice data and image data, and the D channels 12 and 13 transmit control signals for data transmission.

The operation button 4 is operated by the user. By this operation, the sub-address information and the valid time of the newly set sub-address are input to the operation button 4.

The storage circuit 5 stores various information relating to data transmission. Among this information, there are the sub-address and the valid time input to the operation button 4.

The clock circuit 6 is a clock for measuring the effective time of the sub address. The clock circuit 6 informs the control circuit 3 of the measured time.

The control circuit 3 includes a CPU (Central Processi).
ng Unit) and ROM (Read only Memory) are provided inside and various controls are performed. When the interface circuit 1 receives the call setup message, the control circuit 3 receives the clock circuit 6
Check the reception time when this message was received.
In addition, the effective time stored in the memory circuit 5 is checked.

If the checked reception time is within the valid time, the control circuit 3 checks the presence or absence of the sub-address in the received call setup message. If the sub-address is not included, the control circuit 3 reads the sub-address from the storage circuit 5. Then, the control circuit 3 adds this sub-address to the call setup message and, via the D channel 13,
Send to the interface circuit 2.

Next, the operation of this embodiment will be described.

For example, when setting a night-time telephone on the receiving side, the user uses the operation button 4 to set the sub-address of this telephone and the time zone in which this telephone is used, that is, the effective time of this telephone. Operate and enter. The control circuit 3 causes the storage circuit 5 to store the sub-address and the valid time input to the operation button 4.

In such a state, when the sender wants to contact the nighttime telephone, when he does not know the subaddress of this telephone, the call setup message is sent to the receiver without adding the subaddress.

When the interface circuit 1 on the receiving side receives the call setting message, it notifies the control circuit 3 of this reception, and sends this call setting message to the control circuit 3 via the D channel 12.

The control circuit 3 checks the time of the clock circuit 6 by the notification from the interface circuit 1. If the checked time is within the valid time, the control circuit 3 reads the subaddress of the nighttime telephone stored in the storage circuit 5. Then, this subaddress is added to the call setup message and sent to the interface circuit 2 via the D channel 13.

The interface circuit 2 transmits the call setup message received from the control circuit 3 to the line 14.
As a result, only the telephone having the sub-address added to the call setup message rings.

In this way, according to this embodiment, even if the transmitting side does not know the sub-address set on the receiving side, this regulation is effective for the transmitting side.

[0028]

As described above, according to the present invention, even if the sub-address set or changed by the receiving side is not notified to the transmitting side, if a new sub-address is received within the valid time of this sub-address, a new sub-address is set. Can be made available.

[Brief description of drawings]

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

[Explanation of symbols]

 1 interface circuit 2 interface circuit 3 control circuit 4 operation button 5 memory circuit 6 clock circuit 10 ISDN line

Claims (1)

[Claims] 1. The ISD connected to an ISDN line,
A line interface unit for transmitting information to the N line, a terminal interface unit connected to the terminal for transmitting information to the terminal, and a setting unit for setting a new subaddress and setting the valid time of this subaddress. , The storage unit that stores the new sub-address and the valid time set by the setting unit, the clock unit that measures the time, and the line interface unit when the call setting message is received, the clock unit checks the reception time and this reception time If it is within the valid time, the presence or absence of the sub-address in the received call setup message is checked. If there is no sub-address, the sub-address is read from the storage section, this sub-address is added to the call setup message and sent to the terminal interface section. Exchanger for ISDN, which has a section.