JPH0289447A - Key telephone system - Google Patents

Abstract

PURPOSE:To attain the same dial request operation from an extension telephone set to an external line independently of the external line by acquiring a line, specifying number of digits from the inputted dialing destination telephone number information and inputting the destination telephone number information by the specified number of digits. CONSTITUTION:When a key corresponding to an external line 3 among external line buttons included in a key group 42 of an extension telephone set A is depressed, a CPU 41 sends a key code to a master set 1 via a signal line 8. A central control section 11 receiving the key code recognizes it that the code is a request acquiring the external line 3. When a dial pushbutton included in a key group 42 of the extension telephone set 4 is depressed, a dial code corresponding to the dial button is received. Then the received dial code is discriminated to discriminate number of digits of the caller number information. Then the telephone number corresponding to the received dial code is sent to the external line 3 when the dial code by number of digits is received.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is capable of accommodating both analog telephone public network lines and digital communication network lines to which calling number information is transmitted in frames as external lines. It concerns a button telephone system.

[Prior Art] Conventionally, in a key telephone system that accommodates analog telephone public network lines (hereinafter referred to as analog lines) as outside lines, when a call request to an outside line is received from the housed extension telephone, an unused call is sent to the outside line. After capturing the external line in use, dial pulse or D is input for each digit of the dial number information input from the extension telephone
It was transmitted to an analog line captured by TMF signal.

On the other hand, a digital communication network (for example, 15DN network) that transmits calling number information (also called called number information) in a frame
In a key telephone system that accommodates a line (hereinafter referred to as a digital line) as an outside line, when a call request to an outside line is received from the housed extension phone, the unused outside line is captured and then dialed from the extension phone. A special key was pressed to signal the end of input, and the dial number information entered before that key was framed and sent to the captured digital line.

[Problems to be Solved by the Invention] However, there is a difference in the operation after making a call request to an outside line between a button telephone system that accommodates an analog line as an outside line and a button telephone system that accommodates a digital line as an outside line. However, in key telephone systems that can accommodate both analog lines and digital lines as outside lines, the operation is different depending on the outside line to be captured, which has the drawback of being extremely troublesome.

The present invention was made to solve the above problems, and
To provide a button telephone system in which a call request operation from an extension telephone to an outside line can be performed by the same operation regardless of the acquired outside line.

[Means and operations for solving the problem] In order to achieve the above object, the button telephone system of the present invention has the following configuration. That is, the button telephone system includes an extension telephone that accommodates both a digital communication network line and an analog telephone public network line as external lines, and which transmits the calling number information in a frame, and the digital communication is carried out from the extension telephone. a first specifying means for receiving a call request to a network line, seizing the line, and specifying the number of digits from destination telephone number information successively input from the extension telephone; and the first specifying means; a second specifying means for specifying the calling number information according to the calling destination telephone number information when the calling destination telephone number information is input by the specified number of digits, and the calling number information is framed and transmitted to the digital line. works.

Further, a button telephone system according to another invention has the following configuration. That is, the key telephone system includes an extension telephone that accommodates both a digital communication network line and an analog telephone public network line as outside lines, and which transmits the calling number information in a frame, and the digital communication is transmitted from the extension telephone. A time measuring means that receives a call request to a network line, seizes the line, and measures the interval of digits of destination telephone number information that is inputted continuously from the extension telephone, and a destination that is input while the time elapses with the time measuring means. and identifying means for specifying the calling number information according to the telephone number information, and operates to frame the calling number information and transmit it to the digital line.

[Embodiment] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[Description of System (Fig. 1)] Fig. 1 is a system configuration diagram of a key telephone system according to the present invention. In the figure, l is the main device, 2.3 is the outside line,
4.5 is an extension telephone, 6 and 7 are talking lines, 8.9 is a signal line, IO is an exchange unit such as a time switch, 11 is a central control unit that controls the entire device, 12.13 is an outside line interface circuit, and 14 15 is an extension interface circuit, 16 is a memory for storing a program to be described later, and 17 is a timer for measuring the interval between digits of a dialed number. And 41.
51 is the CPU of the extension telephone, 42.52 is the dial button,
A group of keys includes an outside line button and a function button, 43.53 is a hook switch for opening and closing the telephone line 6.7, 44.54 is a speech network circuit, and 45.55 is a handset.

Note that the outside line 2 in this embodiment is an analog line, and in particular uses a dial pulse as a selection signal. The outside line interface 12 is an analog line interface circuit, and in particular has a function of sending dial pulses.

On the other hand, the outside line 3 is a digital line connected to the 15DN network, and the outside line interface 13 includes an I interface based on the CCITT standard.

[Description of Control Procedure (FIG. 2)] Next, the processing procedure of the central control unit 11 in this embodiment will be explained below according to the flowchart of FIG.

In addition, Figure 2 shows that after receiving a capture request for the ISDN line (external line 3), the number of digits in the calling number information is determined, regardless of whether the calling number information includes the area code or not. This shows the processing procedure when creating a frame.

First, when a key corresponding to the outside line 3 included in the key group 42 of the common telephone 4 is pressed, the CPU 41 sends the key code to the main device 1 via the signal line 8.

The central control unit 11 that received this sent key code from the extension interface 14 recognizes that the code is a request to capture the outside line 3 (step 5IOI), and then includes it in the key group 42 of the extension telephone 4. When a dial button is pressed, a dial code corresponding to the dial button is received via the extension interface 14 (step 5102), and then it is determined whether the received dial code is "0" or not. In step 5103), if the determination result is not "0", the destination area is within the city and is determined to be 7 or 6 digits, so the number of digits in the calling number information can be determined (step 5104).

However, in this embodiment, in order to simplify the explanation, “110
Special numbers such as "" and cases with different numbers of digits, such as within Tokyo's 23 wards, are omitted.

On the other hand, if the determination result in step 5103 is "0",
In other words, if the call is outside the area, the dial code corresponding to the next one to three digit "area code" is received (step 5105), and the digits of the calling number information are determined from the received "area code". The number is determined (step 3106).

Therefore, in any case determined in step 5103, the number of outgoing dial digits is determined by the processing in step 5104 or step 5106, and a dial code corresponding to that number of digits is received (steps 5107 and 3108).
When the number of digits of the dial code is received, the telephone number corresponding to the received dial code is converted into a frame as calling number information (step 5109), and output to the outside line interface 13 in order to be sent to the digital line 3. (Step 5ilo).

Next, for the above-described outgoing processing to the digital line 3, the analog line 2 uses the dial pulse as the selection signal.
The procedure for sending a call when it is captured is described below.

As described above, when the outside line button included in the key group 42 of the extension telephone 4 is pressed, the CPU 41 notifies the central control unit 11 via the extension interface 14 of a request to make a call to the outside line 2. In response to this transmission request, the central control unit 11 activates the outside line interface 12 and captures the outside line 2 by closing the DC loop of the outside line 2. When the dial button corresponding to the telephone number of the destination is pressed from the keys 42 of the extension telephone 4, a dial code is received via the extension interface 14, and a dial pulse (not shown) in the outside line interface 12 is pressed. Output to the sending circuit. The dial pulse sending circuit sends out a dial pulse corresponding to the input dial code.

Note that the dial pulse is activated by pressing the dial button 1 in the key group 42.
It is sent every time one is pressed, and the analog line 2
A central office switch (not shown) connected to the terminal starts connection when it receives a predetermined number of digits. Therefore, regardless of whether the captured outside line is an analog line or a digital line, the user of the extension telephone 4 can make a call by dialing with the same operation.

[Other Embodiments] Next, a process of forming a frame of calling number information from a dial code received within the time set in the timer 17 will be described below with reference to the flowchart of FIG.

FIG. 3 shows an example of the calling process when the extension telephone 4 makes a call to the outside line 3 in FIG. 1, that is, when the digital line is acquired.

First, when a key corresponding to the outside line 3 of the outside line buttons included in the key group 42 of the extension telephone 4 is pressed, the CPU 41 sends the key code to the main device 1 via the signal line 8.

The central control unit 11, which received the sent key code from the extension interface 14, recognizes that the code is a request to capture the outside line 3 (step S201).

Then, the timer 17 is activated to measure the time between each digit of the outgoing dial code that is subsequently received.

The timer 17 is started by setting a counter value corresponding to a predetermined time (step 5202).Next, it waits for reception of a dial code corresponding to the destination telephone number (step 5203), When a dial code is received via the extension interface 14 by pressing the dial button (step 5203), the timer 17 is reset (step 5207), and the received dial code is temporarily stored in the memory 16 (step 520).
8) The timer 17 is started again in preparation for the next reception (step 5202).

Here, if the next dial code is not received while the timer 17 operates for a certain period of time (step 5204), it is assumed that the dial code reception has ended, and the dial codes stored in the memory 16 are collectively put into a frame (step 5204).
205), output the frame to the outside line interface 12 in order to send it to the outside line 3 (step 5206)
.

In each of the above-mentioned embodiments, the user of the extension telephone specifies the outside line to be captured by pressing the outside line button, etc. The present invention is also applicable to the case where a vacant outside line is searched for and acquired (the central control unit 11 automatically acquires a vacant outside line).

According to this embodiment, even if the outside line captured when making an outside call in the button telephone system is a digital line (for example, a line of the 15DN network), and it is necessary to frame the dialing signals and send them out. To operate the extension telephone,
The captured outside line may be exactly the same as when it is an analog line, and the user can use it without any confusion.

[Effects of the Invention] As described above, the operation for requesting a call from an extension telephone to an outside line can be performed by the same operation, regardless of the acquired outside line.

[Brief explanation of the drawing]

Fig. 1 is a schematic block diagram of a button telephone system embodying the present invention, Fig. 2 is an operational flowchart for determining the number of digits of calling number information based on the telephone number and creating a frame, and Fig. 3 is a timer for dialing for a certain period of time. 12 is an operation flowchart for collectively forming a frame when there is no frame. In the figure, l...main device, 2.3...external line, 4.5...
・Extension telephone, 8.9...Signal line, 11...Central control unit, 12.13...External line interface, 14
゜15... Extension interface, 16... Memory, 17... Timer, 41.51... CPU, 42.
52...Key group. Figure 3

Claims (2)

[Claims] (1) A button telephone system that accommodates both a digital communication network line and an analog telephone public network line as external lines and that includes an extension telephone, in which the digital communication network is transmitted from the extension telephone. a first specifying means for receiving a call request to a communication network line, seizing the line, and specifying the number of digits from destination telephone number information that is successively input from the extension telephone; 1. A button telephone system comprising: a second specifying means for specifying the calling number information according to the calling destination telephone number information when the calling destination telephone number information is input by a specified number of digits. (2) A button telephone system that accommodates both a digital communication network line and an analog telephone public network line as external lines and that includes an extension telephone, in which the calling number information is to be transmitted in a frame, and includes an extension telephone to the digital communication network. A timer for receiving a call request to a communication network line, seizing the line, and timing the interdigits of destination telephone number information that is successively input from the extension telephone, and a call inputted while the time elapses by the timer. 1. A button telephone system comprising: identifying means for identifying the calling number information based on destination telephone number information.