JPH0670041A - Telephone system - Google Patents

Abstract

PURPOSE:To adjust responding time and to prevent an incoming call from being waited for a long time by providing a display means to display the number of calls for which incoming call to an attendant board is in a waiting state. CONSTITUTION:A call control means 21 terminates calls arriving from trunk lines 4-1-4-m at required extension terminals. At such a time, when an attendant board 3 is the destination and the attendant board 3 is in a bust state, a waiting state control means 22 lets the pertinent trunk lines 4 to be in a waiting state, and a ringing tone is returned to the other communicating party side. Then, the identification information of the trunk line related to the call turned to waiting is sent to a waiting call managing means 23. Thus, a waiting state display control means 25 obtaines the number of waiting calls based on the information of a waiting call storage means 24 managed by the waiting call managing means 23 and performs display a display means 30 corresponding to the obtained number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone system, such as a private branch exchange, for displaying the number of incoming calls waiting to a relay stand.

[0002]

2. Description of the Related Art A system in which a relay stand is connected to a conventional private branch exchange is known. This relay stand has a function of accepting an incoming call coming from a line and transferring the incoming call to a desired extension terminal, and one or two or more sets are provided in the system. For the number of this relay stand,
The number of lines is several times or several tens of times, and other calls often come in when the relay stand is busy. Therefore, when another call arrives while the relay stand is busy, the call is placed in a waiting state (a ringing tone is sent to the other party) and the call is received in the order of arrival.

As described above, the relay stand is provided with an LED (Call Waiting LED) in order to inform the operator that the call is waiting. That is, by turning on the LED, it is displayed that another incoming call is waiting.

[0004]

However, the LEDs provided on this relay stand are all continuously turned on in the same manner when there are one or more incoming call waiting calls. It is impossible for the operator of the relay stand to know whether a call is waiting for an incoming call, and there is a problem in that the handling cannot be changed depending on the number of incoming calls.

Therefore, the present invention eliminates the above problems,
It is an object of the present invention to provide a telephone system having a function capable of notifying the number of incoming calls.

[0006]

Therefore, according to the present invention, an incoming call to a relay station in a telephone system provided with a relay station for accepting an incoming call and transferring the incoming call to a desired extension terminal. Is provided with display means for displaying the number of calls waiting, while call control means for performing call control for receiving a call coming through a line to the extension terminal and the relay stand, and the relay stand When a call destined to the relay station arrives in the busy state, a waiting state control unit that puts the call in a waiting state, and a waiting call storage unit that stores identification information about the waiting call A relay call based on information stored in the standby call storage unit and a standby call management unit for registering and deleting a standby call for the call in the standby state by the standby state control unit. Stand The number of calls has become incoming call waiting state against is obtained by constituting the telephone system allowed and a display control means for displaying on the display means.

[0007]

According to the above construction, when a call arrives while the relay stand is in the busy state, the call is put in the waiting state and its identification information is stored in the call storing means. The display control means causes the display means of the relay stand to display the number of calls waiting for an incoming call to the relay stand based on the information in the call storage means. That is, the number of calls in the waiting state is displayed on the display means of the relay stand.

[0008]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 3 is a block diagram of a private branch exchange according to an embodiment of the present invention. A plurality of extension telephones 2, a relay stand 3, and an office line 4 are connected to the exchange main body 1. The exchange main body 1 includes a speech path network 11, an outside line circuit 12 corresponding to an office line 4, an extension line circuit 13 corresponding to an extension telephone set 2 or a relay stand 3, a central processing unit 14 for centrally controlling each part, and a central processing unit of this central processing unit. A storage unit 15 in which data and programs used by the unit 14 are stored is provided. The call line network 11, the extension circuit 13, and the outside line circuit 12 are controlled by the operation of the central processing unit 14 based on the program accumulated in the storage unit 15, and between the station line and the extension terminal or between the extension terminals. Are configured to be connected.

FIG. 4 shows a plan view of the relay stand 3. Call Waiting on the relay stand 3,
A display lamp 31 (LED) for displaying when there is a call related to the waiting state is provided, and further, the dial key 3
4. A response key 32 for answering a call and a transfer key 33 for transferring a call are provided. In addition, various indicators and keys necessary to monitor the state of each extension telephone 2 and to perform appropriate replacement work are provided.

In the above arrangement, the central processing unit 14
1 using the program and data in the storage unit 15.
This will be described because it functions as each means shown in. The relay stand 3 is provided with a display means 30 for displaying the number of calls waiting for an incoming call to the relay stand 3. The display means 30 is a display lamp (LED) in FIG.
31. The central processing unit 14 functions as a call control unit 21, a waiting state control unit 22, a waiting call management unit 23, and a waiting state display control unit 25. The waiting call storage means 24 is provided in the storage unit 15 and stores information regarding a call in a waiting state with respect to the relay stand 3.

FIG. 2 shows the details of the waiting call storage means 24. That is, the waiting call storage means 24 has the relay stand 3
Memory table 26 for storing the identification information of the call in the waiting state, and a pointer 27 for storing the head address where the identification information of the oldest waiting call is stored. And a register 28 for storing the number of identification information stored therein. Memory table 26
Stores the identification information (line trunk number) of a call in a waiting state with respect to consecutive addresses, and a valid flag is attached to each address. This memory table 26
Is initially used from the youngest address, and when it is used up to the last address, it returns to the first address and is used toward the last address. The valid flag is set by the end of the call in the middle of waiting or the end of the waiting state.
It is set as an invalid flag (reset).

The call control means 21 causes a call coming from the office line 4 to arrive at a required extension terminal. At this time, if the relay stand 3 is the destination and the relay stand 3 is in the busy state, the waiting state control means 22 puts the station line 4 in the waiting state, and the ringing tone is returned to the other side. The identification information of the station line relating to the call waiting is sent to the waiting call management means 23. The waiting call management means 23 refers to the pointer 27 and the valid flag to store the information sent above to the address next to the last one of the identification information among the waiting calls that are effectively stored. The write and valid flags are set, and the value of the register 28 is incremented by "1". In this way, the waiting state display control means 25 makes the waiting call management means 2
The number of waiting calls is obtained based on the information of the waiting call storage means 24 (information of the register 28) managed by 3, and the display means 30 displays the number of waiting calls.

The operation of the above means is carried out by the program of the flowcharts shown in FIGS. 5 to 7, which will be described below. As shown in FIG. 5, the central processing unit 14 detects whether there is an incoming call from the station line or extension to the relay stand 3 (step 201).
When there is an incoming call, the central processing unit 14 checks the state of the relay stand 3 at that time (step 202). here,
When it is detected that the relay stand 3 is in the idle state (idle state), normal incoming call processing is performed (step 203). On the other hand, when it is detected that the relay stand 3 is not in the Idle state, the incoming call process at Call Waiting, for example, the state in which the ringing tone is returned to the other party is performed (step 204), and the LED 31 is turned on. A process (step 205) of turning on the light according to the number of waiting calls is performed.

Now, the operation in step 205 will be described in detail with reference to FIGS. 6 and 7. When the central processing unit 14 detects an incoming call in the incoming call detection process (401) to the relay stand 3, the incoming call process (402).
Move to. Here, the state check process (403) of the relay stand 3 is performed, and it is determined whether the normal incoming call process (402.1) or the Call Waiting incoming process (402.2) is performed according to the result. To do. As a result of this judgment,
When performing incoming processing of Call Waiting (402.2
Then, if the answer is affirmative), the information regarding the waiting call is written in the waiting queue (“queue”) to the relay stand 3 and, in this embodiment, the waiting call storage means 24 (a). Control) and control is passed to step 405 (by control shown by b). The central processing unit 14 according to step 405 activates step 406 under the control shown by c, checks here how many calls are waiting for the relay stand 3, and distinguishes the blinking pattern according to the number of calls ( CW) The LED 31 is driven (step 405 under the control indicated by d).

FIG. 7 shows an example of this blink pattern discrimination.
The number of waiting calls is determined (301). As a result, if the number of waiting calls is 0, the (CW) LED 31 is turned off (30
2) If the number of waiting calls is 1, continuous lighting is performed (30
2) If the number of waiting calls is 2, blinking is executed at a slow cycle (303). Further, when the number of waiting calls is 3, blinking is performed at a fast cycle (305). By executing the blinking control in this way, the operator of the relay stand 3 can know whether there are many calls in the waiting state by the blinking cycle. That is, if the blinking cycle is early, there are many waiting calls. In this example, there are only two types of blinking cycles, but by further increasing the types, the number of calls in the waiting state can be displayed in detail. Also, in the above example,
Although the number of calls in the waiting state is set to four categories of 0, 1, 2, 3 or more, this may be a category having a range such as 0, 1-2, 3-5, 6 or more.

Further, it is assumed that the LED 31 used in the above embodiment has a single color. However, (CW) LE
When one LED for two colors (green and red, etc.) is used for D31, the number of waiting calls can be displayed more accurately. That is, as described above, in the other embodiment employing one LED that displays two colors, in the conventional example, the processing is performed as shown in FIG.
The processing shown in is performed. That is, first, the central control unit 14 checks the number of incoming call waiting (501), and turns off the multi-color (CW) LED 31 if the number of incoming call waiting is 0 (50).
2) In the case of 1, it is a continuous green display (50
3). Further, when the number of incoming calls is 2, blinking green is displayed (504), and when the number of incoming calls is 3, continuous lighting of red is performed (505). If it is 4 or more, blink red light (50
6). As a result, the operator of the relay stand 3 can be notified of the number of calls waiting for incoming calls.

[0017]

As described above, according to the present invention, when a call arrives while the relay stand is in the busy state, the call is put in the waiting state, and its identification information is stored in the call storing means. The display control means causes the display means of the relay stand to display the number of calls waiting for an incoming call to the relay stand based on the information in the call storage means. That is,
The number of calls in a waiting state is displayed on the display means of the relay stand.
This allows the operator of the relay stand to know the number of calls waiting for incoming calls, thereby expecting to adjust the response time, and preventing incoming calls from being held for a long time.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing a memory map of a waiting call storage means used in an embodiment of the present invention.

FIG. 3 is a block diagram of a private branch exchange according to an embodiment of the present invention.

FIG. 4 is a plan view of a relay stand used in the private branch exchange according to the embodiment of the present invention.

FIG. 5 is a flowchart for explaining the operation of the embodiment of the present invention.

FIG. 6 is a flowchart for explaining the operation of the embodiment of the present invention.

FIG. 7 is a flowchart for explaining the operation of the embodiment of the present invention.

FIG. 8 is a flowchart for explaining the operation of the embodiment of the present invention.

[Explanation of symbols]

1 exchange main body 2 extension telephone 3 relay stand 4 office line 11 speech path network 12 external line circuit 13 extension circuit 14 central processing unit 15 storage unit 21 call control unit 22 waiting state control unit 23 waiting call management unit 24 waiting call storage unit 25 waiting Status display control means 26 Memory table 27 Pointer 28 Register 30 Display means

Claims (3)

[Claims] 1. A telephone system provided with a relay stand for accepting an incoming call and transferring the incoming call to a desired extension terminal, wherein the relay stand is for a call waiting for an incoming call to the relay stand. While the display means for displaying the number is provided, the call control means for performing call control for receiving the call coming through the line to the extension terminal and the relay stand, and the relay stand when the relay stand is in a busy state. When a call as a destination arrives, a waiting state control unit that puts the call in a waiting state, a waiting call storage unit that stores identification information about the waiting call, and a waiting state control unit Based on the information stored in the waiting call management unit that registers and deletes the waiting call for the call that has been placed in the waiting call storage unit, the incoming call to the relay stand is placed in the waiting state. A telephone system, comprising: a display control means for displaying the number of calls being made on the display means. 2. The display means comprises a display lamp, and the display control means controls a mode of turning on / blinking / turning off the display lamp in accordance with the number of calls waiting for an incoming call to the relay stand. The telephone system according to claim 1, wherein: 3. The display means comprises a display lamp for displaying a plurality of colors, and the display control means has a display lamp for each color corresponding to the number of calls waiting for an incoming call to the relay stand. 3. The telephone system according to claim 1, wherein the lighting system, the flashing system, and the extinguishing system are controlled.