JPH01265692A - Key telephone set - Google Patents

Abstract

PURPOSE:To attain the connection to other extension telephone set while releasing the hot line function by providing an extension shift call function also in addition to the hot line function. CONSTITUTION:A master set 1 consists of line wire interfaces 111-11n, channel switch 12, telephone set interfaces 131-13m, a CPU 14, a ROM 15 and a RAM 16. The CPU 14 has a function setting the extension hot line mode between two designated key telephone sets (41-4m) and a function of extension call applying extension calling to other key telephone set by the hook-off of one key telephone set and a control function transiting to the shift call function by the dialing of one key telephone set during extension calling to call other key telephone set. Thus, even if the opposite party is absent, the hot line function is released and connected to other extension telephone set for talking.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a button telephone device having a shift call function.

[Prior Art] Conventionally, telephones equipped with an extension hotline function have been used, and these telephones are equipped with a hotline button on the calling telephone side, and by operating this button, an extension call is made to a specific telephone. Using this feature, you can call a given telephone extension by simply going off-hook without having to dial the extension number.

[Problems to be Solved by the Invention] However, such conventional devices require dedicated buttons, making them cumbersome to operate, and also have problems in that they are not economical because standard telephones cannot be used. For this reason, it is conceivable that a handset with an extension hotline set can call the other handset only by off-hook operation, but if you do that, there is a problem that you will not be able to call any extension phone. 9 [Means for Solving the Problems] In order to solve such problems, the present invention provides a system that when a telephone set with a hotline is making an extension call, by performing a predetermined dialing operation, it is possible to call another telephone. It is equipped with a shift call function that allows you to call an extension telephone.

[Function] By performing a dial operation, the call destination is switched from the extension telephone set for the hotline to the extension telephone designated by the dial number.

[Embodiment] FIG. 2 is a block diagram showing an example of a telephone device configured to apply the present invention. In the figure, 1 is the main device, 21 to 2fl are outside lines, 3□ to 3yo are extension lines, and 41 to 4 degrees are key telephone devices. The main device 1 has an external line interface 11. to 117, call path switch 12, telephone interface 13□ to 13. ,,CPU14,ROM
15 and RAM 16.

Among these, the CPU 14 has the function of setting the extension hotline 1 to line mode between two specified button telephones and the packing machine, and the off-hook of one button telephone when the extension hotline mode is set, and the function of setting the other button telephone. It has an extension calling function for calling an extension, and a control function for switching to a shift call function and calling another extension by dialing one button telephone while an extension is calling.

FIG. 2 is a flowchart showing one embodiment of the present invention. In the figure, in step 100 the status of the telephone is determined to be on-hook, in step 101 it is determined that the key code is off-hook, and in step 102 it is determined that the telephone is set to an extension hotline. is carried out, and in step 103 it is determined that there is a vacant extension, and in step 104 it is determined that the other party's telephone is on-hook.In step 105, the status of the telephone is changed to make an extension call. Then, as shown in step 106, the extension is captured, as shown in step 107, a process is performed to output a ringback tone to the own telephone, and then a ring tone is sent to the other party's telephone as shown in step 108. Perform the processing to do.

In this state, the hotline calls the other party's extension telephone, but if the other party is absent, the call cannot be made. Then, when a dial operation is performed to select another extension telephone, it is determined at the next timing that the off-hook condition is set in step 100, and step 1
In step 09, it was determined that the own telephone was making an extension call, and in step 111, it was determined that the key code was an extension number, and as shown in step 112, it was set as the previous extension telephone, that is, the destination of the hotline. Extension will be opened. Then, as shown in step 113, the ringback tone is stopped for the own telephone;
Stop the previous caller's extension phone from ringing.

Next, the flow advances to step 104, and as described above, the processes from step 104 to step 108 are sequentially performed.
The new party's extension telephone is called. As a result, even if a responder is not present at the other party's extension telephone set for which a hotline has been set, it is possible to make a call to another extension telephone set for which the hotline has not been set.

If there is no vacant extension in step 103, step 1
As shown in step 15, if a status change is made to set the telephone to the busy state, and if it is determined in step 104 that the other party's telephone is not on-hook, the state of the telephone is changed to the other party's busy state as shown in step 116. The status change to be set is made.

In the above embodiments, the other party's extension telephone is called by a ringer, but this may be a voice call, or the extension call may be bidirectional, and in the case of an outside call, the outside line key is pressed on-hook. It is also possible to use easy on-hook dialing by operation, to be able to answer incoming calls to both external and internal lines, and to have a two-way internal hotline function.

[Effects of the Invention] As explained above, this invention has an extension shift call function in addition to a hotline function, so conventionally, a call could not be made unless there was a responder at the other end of the hotline function. This has the effect of canceling the hotline function and allowing you to connect to another extension phone and make a call.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing one embodiment of the present invention, and FIG. 2 is a block diagram of a button telephone device constructed by applying the present invention. 1...Main device, 21~2°...External line, 31~3
．．・・・Extension, 41-4. ...button telephone device,
11□〜11.・・・External line interface, 12・
...Call path switch, 131-13. ...Telephone interface, 14...CPU, 15...
ROM, 16...RAM.

Claims (1)

[Scope of Claims] In a pushbutton telephone device having a shift call function of calling another extension telephone by dialing during an extension call, a setting means for setting an extension hotline mode between two specified pushbutton telephones; An extension calling means that calls the extension of the other button telephone by off-hooking one button telephone when the extension hotline mode is set by the means, and a transition to shift call function by dialing the one button telephone during an extension call. and a control means for calling another extension telephone.