JPH04156044A - Key telephone system - Google Patents

Abstract

PURPOSE:To perform targeted outgoing and to eliminate wasteful time until the outgoing is performed by performing camp-on registration by designating a central office being used at present, and issuing a call return to a telephone set only when a designated central office becomes null. CONSTITUTION:A control part 2 registers central office non-designation camp-on memory 3 so as to issue the call back when either the central offices becomes null when all the central offices are being used by checking the working state of the central office of the memory 3. Then the central office non-designation camp-on is registered on the memory 3, the control part 2 performs call back processing by controlling an extension interface 6 to inform the fact that the central office becomes null to an extension telephone set on which the camp-on registration is performed. Thereby, it is possible to prevent the wasteful time from being consumed until the targered outgoing is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a button telephone device having a central office line camp-on function.

[Prior Art] Conventionally, in this type of device, when attempting to make a call from an extension telephone to a central office line and all central office lines are in use, camp-on registration is performed by operating a predetermined key. The system is configured to call back the telephone that registered camp-on when any of the central office lines become vacant.

[Problems to be Solved by the Invention] However, in the conventional example described above, when you register for camp-on, you will be called back if any of the station lines in use becomes vacant. If the central office line is captured by callback, the intended call (
For example, there were cases where it was not possible to make international calls, etc., and there was a problem that time was wasted waiting for the desired call to be made.

[Means for Solving the Problems] The present invention is intended to solve the above-mentioned problems. A means is provided for calling back a telephone registered in camp-on when a designated office line becomes vacant.

[Embodiment] FIG. 1 is a block diagram of an embodiment of the present invention, in which 1 is a main device of a button telephone device, 2 is a control section that controls the entire device, and 3 is a block diagram of an embodiment of the present invention.
1 is a memory in which various data such as operational data is stored; 4 is a switch network that connects the extension lines and external lines; and 5 is a central office line interface that detects incoming calls from the central office line 7 and sends out dials; is an extension interface for detecting dial keys and various function keys from the telephone 8, 7 is a central office line, 8 is an extension telephone, 9 is a handset, 10 is a dial key, 11 is a central line key for selecting a central office line, 12 is a central telephone It is a function key.

FIGS. 2 and 3 are flowcharts showing the operation of the control unit 2 in one embodiment of the present invention. FIG. 2 shows the operation at the time of camp-on registration, and FIG. 3 shows the operation at the time of camp-on execution.

First, the operation is shown below in FIG.

Control s2 connects telephone 411 via extension interface 6.
The press of the camp on key 12-1 of No. 8 is monitored, and when the press of the camp on key 12-1 is detected (step 52
1) The press of the "0" key of the dial key 10 or the office line key 11 is monitored (steps S22 and S23). When the press of the central line key 11-1 is detected (step S23)
, the control unit 2 checks the usage status of the central office line 7-1 corresponding to the pressed central office line key 11-1 based on the information in the memory 3 (step 524). If the central office line 7-1 is in use, the central office line 7-1 is It is registered in the station line designated camp-on memory 3 so that a callback will be made only when the station line is vacant (step 525). If it is not in use, the central office line is simply regarded as a designated outgoing call, and the central office line interface 5 is controlled to perform the outgoing call process (step 5).
26).

When it is detected in step S22 that the "0" key of the dial key 1O is pressed, the control section 2 checks the office line usage status in the memory 3 and determines whether all the office lines are in use (step 527). If it is in use, it is registered in the non-station line designated camp-on memory 3 so that a callback will be made when any station line becomes vacant (step 529). If there is even one office line that is not in use, the control unit 2 controls the office line interface 5 to capture that office line and performs the calling process (
step 828).

Next, the operation is shown below in FIG.

The control unit 2 checks the usage status of the office lines in the memory 3, and when any of the office lines changes from the usage status to the unused status (
Step S31), it is determined whether there is a station line designated camp-on registration in the memory 3 (Step 532).
. If so, the correspondence between the current station line and the designated camp-on station line registered is checked to determine whether there is a match (step 533).

If there is a match, the control unit 2 controls the extension interface 6 to ring the registered extension telephone to notify that the designated office line is available.

If there is no registered camp-on designated in step S32 or if the central line does not match in step S33, it is determined whether there is registered camp-on not designated as a designated central line in the memory 3 (step S35), and if there is. At this time, the control section 2 controls the extension interface 6 to perform call-back processing in order to inform the extension telephone that has registered camp-on that the office line is free.

When the extension telephone that called back goes off-hook after any call-back process, the control section 2 captures the @ line registered as camp-on and makes a call according to the dial number input from the extension telephone.

In this embodiment, a central office line key is used to specify the central office line, but a dial key indicating a single central office line number may also be used.

[Other Embodiments] In this embodiment, the type of line (international outgoing line,
Digital communication lines, etc.) are registered, and camp-on specifications are specified for each line type.

The configuration of this embodiment is the same as that in FIG.

That is, when the office line designated as camp-on is in use at step S24 in FIG. Step S44), and if there is one, the central office line is acquired and a call is made (Step 526). On the other hand, if there is no vacant office line with the same identification, a camp-on designated by the office line type is registered (step 545).

On the other hand, if the station line type designated camp-on is registered in step S52 of FIG. 553). If there is a match, the extension phone number @8 is called back.

When the extension telephone that called back goes off-hook, the control section 2 seizes the vacant office line and makes a call according to the dial number input from the extension telephone.

[Effects of the Invention] As explained above, because the camp-on registration is performed by specifying a station line that is in use, and the call is returned to the telephone only when the designated station line is vacant, the capabilities differ depending on the station line. Even if it is configured, from the station line that was captured off-hook due to callback,
This has the effect of making it possible to make a desired call (for example, an international call), and eliminating wasted time before making a call.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of an embodiment of the present invention, Figs. 2 and 3 are operation flowcharts of the control section of the embodiment, and Figs. 4 and 5 are operation flowcharts of the control section of other embodiments. It is. 1 is a main unit 2, a control unit 3, a memory 6, an extension line interface 7, a central office line 8, a telephone 10, a dial key 11, a central office line key 12, and function keys.

Claims (2)

[Claims] (1) In a button telephone device having a central office line camp-on function, a means for specifying a central office line that is in use and registering a camp-on, and calling back a telephone that has registered a camp-on when the designated central office line becomes vacant. A button telephone device comprising: means. (2) The key telephone device according to claim 1, characterized in that the call-back means calls back the telephone that has registered camp-on when the same type of office line as the designated office line becomes vacant. button telephone device.