JPH02248190A - Key telephone set - Google Patents

Abstract

PURPOSE:To restrict trunk line call via a PBX and to control line wire open by providing a means deciding a acquired line wire, a dial digit count means, a line wire open means, a presence setting means restricting trunk line call and a means for setting the presence of dial digit restriction. CONSTITUTION:An on-hook operation and key operation of a key telephone set 4 are received by a CPU 14 of a master set 1 to control a channel switch 12 to apply exchange connection. In the case of a call from a line wire 2, dialing is applied by the control of a selected external interface 11 and in the case of extension call, a display device 47 to an opposite key telephone set is controlled to send an extension call tone to form the talking state. Whether or not the wire 2 is connected to a centrex extension is set to a setting section 17, the presence of trunk call control via the centrex for each key telephone set is set to a setting section 9 and the presence of extension 5-digit call restriction is set to a setting section 19 by each key telephone set respectively and a line wire call is restricted. Moreover, an external call is detected by an interface 11 and the CPU 14 controls a display device 47 of the telephone set and the CPU completes the channel with off-hook.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a button telephone device, and more particularly to a button telephone device that accommodates a PBX extension as an outside line and regulates outgoing calls to a central office line via the PBX extension. be.

[Prior Art] When making a call to a local office line via a PBX, this type of conventional button telephone device first captures an available outside line, dials a PBX access code, listens to a dial tone, and then If you dial the number of the other party and the other party answers, the call will be made.

When restricting central office line calls via the PBX, enter the pre-stored access code and the entered dial number.
When the numbers in the digits matched, a call was made to the central office line via the PBX, and the captured outside line was released.

Furthermore, when making a call to an extension within the PBX via the PBX, the telephone picks up the outside line and then dials the number of the other party within the PBX, and if the other party does not respond, the call is made.

"Problem to be solved by the invention"
During an extension call within X, if the other party goes on-hook and the call is held for a certain period of time after the call ends, a dial tone will be generated and it will be possible to make a dial call.

Therefore, a conventional key telephone device that accommodates a PBX extension line as an outside line, such as the one shown in L, has a problem in that even telephones that are restricted from making calls to the office line via the PBX can freely make calls to the office line.

[Means for Solving the Problems] In order to solve such problems, the button telephone device according to the present invention includes a determining means for determining whether or not a captured outside line is a PBX extension, and a determining means for determining whether or not a captured outside line is a PBX extension. It is equipped with a counting means for counting the number of dialed digits input from the captured telephone according to the output, and an outside line release means for releasing the captured outside line when the content of the counting means reaches a certain value, and also has a PBX extension line. The system is equipped with a setting means for setting for each telephone whether or not there is a restriction on dialing digits for PBX extensions.

[Operation] When the telephone captures an outside line, it is determined whether or not this outside line is accommodated in the PBX extension. And this is the PBX
When it is determined that the extension line is accommodated, the number of dialed digits input from the telephone is counted, and when this number does not reach a certain value, the captured external line is released.

Further, when a telephone makes a call to a central office line via a PBX, the call is restricted in accordance with the contents of the central office call restriction set in advance for each telephone.

Further, when the telephone makes a call to a central office line via the PBX, the outside line opening means is controlled according to the details of dial digit regulation set in advance for each telephone.

[Example] Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

FIG. 1 is a block diagram showing an embodiment of a button telephone device according to the present invention. In the figure, the main device 1 includes a central office line or PBX from a telephone office, and a business group telephone (hereinafter referred to as
External line 21- such as a telephone line from (called Centrex)
2. are stored, and each one according to the storage position
Through the line 31-3m of paired communication lines and signal lines,
Button telephone 41-4. , is connected and external line 2□
2n, each external line interface 1.1l-11n
While the lines 3□- from the communication path switch 12 and each telephone 4□-4m are connected to the communication path switch 12 through
3 and n are connected via telephone interfaces 13□-131, and exchange connections are made by cross points such as analog switches or relay contacts in the communication path switch 12.

The outside line interface llr 11n has functions such as incoming call detection, DC loop closure for outside lines, hold, and dialing using DP double signal or PB double signal.
The call path switch 12 connects outside lines 21-29 and key telephones 41-4. , and between the telephones 4□-4□, the telephone interface 13'□-13゜ provides power supply for telephone calls via the telephone line to the button telephones 4'1-4m. , transmits and receives data signals via signal lines, and supplies control power.

The main device 1 also includes a processor unit (CPU) 14 such as a microprocessor. Fixed memory (ROIVI)
1'5. and variable memory (R, AM) 16 are provided, the CPU 14 executes the program in the ROM 1S, stores the data generated at that time in the RAM 16, or refers to the contents of the RAM 16 when necessary. It is designed to perform control while Also,
The CPU 14 outputs incoming call detection from the outside line interface 11□-11n, and the telephone interface 131-13.
Control decisions are made according to operation data from button telephones 4□-4□ via 1, and external line interface 11
□-11n2 communication path switch]2, controls the telephone interface 1-3□-13□, and also controls the button telephone 41-4. n. In addition, the main device 1 has an outside line 2r in the first setting section 17 in order to restrict outgoing calls from the key telephone, which will be described later.
2. The second setting section 18 determines whether or not the telephone is connected to the Centrex extension line, and the second setting section 18 indicates whether or not there is restriction on making calls to central office lines via the Centrex.
9, whether or not there is a 5-digit calling restriction for Centrex extensions is set for each key telephone using a dip switch.

On the other hand, in each button telephone 414m, a communication circuit 42 is connected to the communication line 41A, a control unit 44 is connected to the signal line 41B via a transmission circuit 43, and a display 47 and The tone generator and the amplifier are controlled, and according to the control data via the transmission circuit 43, the display is displayed and the incoming call tone is sent out from the speaker, etc., and the display lamps in the keyboard 46 are also controlled according to the control data. In addition to controlling the light on and off and blinking twice, operation data indicating these conditions is transmitted via the transmission circuit 43 in response to the operation of each key on the keyboard 46 and the operation of the hook switch H3. .

Note that the transmission circuit 43 has a power supply separation function, and the signal line 41
The power supplied from the main device 1 side via B is extracted, stabilized, and then supplied to each necessary part as local power (2).

Therefore, when off-footer is performed on any button telephone 4, the operation data is received by the CPU 4, and the key operations on the keyboard 46 are also performed in the same manner, and the CPU 14 performs a call according to the operations of the outside line key, extension key, and dial key. It controls the line switch 12 to establish an exchange connection, and if it is an outside line call, it dials the call under the control of the selected outside line interface 11.
If it is an extension call, an extension ringing tone is sent by controlling the display 47 of the key telephone 4 of the other party, and the call state is established by the response of the other party 9.
When restricting outside line calls, outside line calls are restricted according to the call restrictions set in the first setting section 17 to third setting section 19 of the main device 1.

Also, incoming calls from outside lines 2 and -2° are detected by the outside line interface 11□-11n, and the CP
[J14 is each phone 4. -4- controls the display 47,
In order to send out an incoming call tone, if any telephone 4 responds by off-knocking, the CPU 1
Reference numeral 4 controls the communication path switch 12 to complete the communication path.

Next, the operation of the CPU 14 for the configuration of the embodiment described in L will be explained as follows.
This will be explained based on the flowchart shown in the figure. When a vacant outside line key on the keyboard 46 provided on the button telephone 4 is pressed, an outside line acquisition process is performed in step 100 to acquire the outside line. Subsequently, in step 101, initialization processing for dialing restriction check is performed to check dialing restriction.

When this initialization process is performed, the input dial will be checked in accordance with the calling regulations starting from the first digit. Next, in step 102, when the dial key in the keyboard 46 is pressed and a dial is input, in step 103, the outside line connection information preset in the first setting section 17 in the main device 1 is read out and captured. Determine whether the outside line is connected to Centrex. When this is r Y J, that is, when connected to Centrex, step 104 is performed to regulate the number of dial digits, which will be described later.
Increase the number of dial input digits by 1.

Next, in step 105, the call restriction information set in advance in the second setting unit 18 in the main device 1 is read out, and the key telephone 4 on which this dial input was performed is set to restrict calling by central line dialing via Centrex. Determine whether or not there is. When this is "Y", the call restriction information also read out from the second setting section 18 in step 106,
That is, it is checked whether the Centrex trunk access code and the first digit dial number input from the key telephone 4 match, and then in step 107 it is determined whether or not they match, that is, whether or not the central office line call is restricted via the Centrex. conduct. And when this is "Y" and there is restriction, that is, when it matches the trunk access code,
At step 108, an outside line release process is performed to release the outside line, and the process ends.

Next, in step 105, if "N" is selected, that is, if this button telephone 4 is not set to restrict dialing via Centrex, the dial digit dialing restriction information is read from the third setting section 19, and in step 109, dialing restriction information is read out from the third setting section 19. It is determined whether or not the key telephone 4 on which the input was made is set to restrict 5-digit calls from the Center. If this is "Y", that is, the 5-digit calling restriction is set, it is determined in step 110 whether or not the number of dialed digits entered is 6 or more. If this is "Y", it means that outgoing calls have been restricted, and the process goes to step 108 to open an outside line, and the process ends; if this is "N", step 102
The screen returns to the screen and waits for dial input. In step 109
l'J'', that is, when the Centrex 5-digit calling restriction is not set, the process returns to step 102 and waits for dial input. If "N" is determined in step 107, that is, the dial call restriction is checked and no restriction is found, the process proceeds to step 109, where it is determined whether or not the Centrex 5-digit call restriction is set. Also, step 1
If it is "NJ" in step 03, that is, the captured outside line is not connected to Centrex, the process proceeds to step 105, where it is determined whether or not dial dial restriction is set.

As explained above, when the key telephone 4 acquires an outside line and dials a central office line, it is determined whether the acquired outside line is connected to the Centrex extension. When it is determined that the telephone is connected to the Centrex extension, the number of dialed digits entered is counted, and then it is determined whether or not this button telephone 4 is set to restrict calls to central office lines via Centrex. , When this is determined to be a call restriction, the captured outside line is released.

In addition, even if it is not determined that there is a call restriction in the above, if it is determined that a 5-digit call restriction for Centrex extensions is set on this button telephone 4, when the number of dialed digits counted above becomes 6 digits or more. The captured outside line is released.

In this embodiment, the second setting section 18 sets whether or not there is restriction on dialing digits via Centrex extensions for each button telephone, and the third setting section 18 sets whether there is restriction on dialing digits for Centrex extensions for each button telephone. However, one third setting section may be omitted and dial digit regulation may be controlled in conjunction with the settings of the second setting section 18.

Further, instead of providing one of the first setting section 17 to the third setting section composed of a dip switch, the system data may be input from a specific button telephone using a dial key and stored in the RAM 16. .

Furthermore, the number of digits of the dial to be restricted may be variably set.

[Effects of the Invention] As is clear from the above explanation, according to the button telephone device according to the present invention, an outside line can be captured by a telephone set in which calls to the central office line via P and BX extensions are restricted, and dialing to the central office line can be made. When this is done, if it is determined that the captured external line is accommodated in the PBX extension, the number of digits of the input dial is counted, and when this count value reaches a certain value, the captured external line is released. PBX
This has the effect that central office line transmissions via the network are completely regulated.

In addition, the system is configured so that restrictions on calling central lines through the PBX can be set for each phone, and the presence or absence of dial digit restrictions for PBX extensions can also be set for each phone. It is possible to set a variety of calling restrictions, and the effect is that the calling restrictions can be selected according to the user.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a button telephone device according to the present invention, and FIG. 2 is a flowchart for explaining the operation of this embodiment. 1... Main device, 2. -2.・・・External line, 31-3
m...Line, 4□-4tn...Key telephone, 1.11''-11n...External line interface, 12...Call path switch, 13□-13□...
...Telephone interface, 14...Processor unit (CPU) 17...First setting section, 18...
...Second setting section, 19...Third setting section.

Claims (3)

[Claims] (1) PB that accommodates and accommodates PBX extension lines as outside lines
A button telephone device that regulates calling from a telephone to a central office line via an The system is equipped with a counting means for counting the number of dial digits inputted from the input terminal, and an outside line release means for releasing the captured external line when the contents of the counting means reach a certain value, and imposes dial digit restrictions on the capture of PBX extensions. A button telephone device characterized by: (2) The key telephone device according to claim (1), further comprising a setting means for setting for each telephone whether or not there is restriction on making calls to a central office line via a PBX extension, and making calls to a central office line in accordance with the settings of the setting means. A button telephone device characterized by carrying out regulation. (3) The button telephone device according to claim (1), further comprising a setting means for setting for each telephone whether or not there is dial digit restriction for PBX extensions, and controlling the outside line opening means according to the settings of the setting means. A button telephone device characterized by: