JP2558367B2 - Call control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] For example, the same phone number is assigned to an executive and his secretary's terminal. When calling the telephone number, the secretary's terminal is called first, and if there is no response within a certain period of time, the executive's terminal is called. With regard to the call control method for calling the secretary B, the secretary B and the secretary B's terminals are connected to different terminals, and the same telephone number is given to call the secretary B's terminal first. For the purpose of providing a detailed service of calling the terminal A, in a private branch telephone switching system having a communication line network and a central control unit, a plurality of terminals of the communication line network are preliminarily provided with the same telephone. A number is given, and when calling the telephone number, a terminal of a predetermined first order among the plurality of terminals is called, and after calling the first terminal, Whether or not the elapsed time exceeds a certain time is monitored, and when the elapsed time exceeds a certain time, the terminal of the next predetermined order among the plurality of terminals is called and the elapsed time after the terminal is called. Is repeated, and the terminal of the final order among the plurality of terminals is called without monitoring the elapsed time after calling the terminal.

[Industrial applications]

The present invention relates to a private telephone exchange system, and more specifically, for example, assigns the same telephone number to an executive and its secretary's terminal.When calling the telephone number, the secretary's terminal is called first and a response is given within a certain period of time. The present invention relates to a call control method for calling a terminal of an executive when there is not.

[Problems to be Solved by Prior Art and Invention]

FIG. 8 is a block diagram of a conventional private telephone exchange system. In the figure, the communication channel network 1 is controlled by a central control unit (CC) 2, for example, an executive A and his secretary B.
The telephone terminals 3 and 4 are multi-connected to the same terminal of the communication path network 1. Therefore, when a person calls the executive A, the terminals 3 and 4 ring simultaneously because they are multi-connected. In general, secretary B answers first, and the ringing signal is stopped by the reply.

As described above, since the terminals of the executive A and the secretary B are conventionally multi-connected to the same terminal, the terminal of the executive A rings even when the incoming call only requires the response of the secretary B. There was a service problem of doing.

The present invention connects the terminal of the secretary A and the terminal of the secretary B to different terminals and gives the same telephone number to call the terminal of the secretary B first, and when there is no response within a certain time, the terminal of the officer A The purpose is to provide a detailed service of calling.

[Means and Actions for Solving the Problems]

FIG. 1 is a functional block diagram of the present invention. This figure shows the communication path network 1 and the central control unit (CC) that controls it.
FIG. 3 is a functional block diagram of a call control system in a private branch exchange system having two.

In FIG. 1, 5 is a terminal of the communication path network 1,
For example, the same telephone number is given in advance to a plurality of specific terminals out of 1,000 terminals, and in the case of executive / secretary call control, two terminals, one for the executive terminal and one for the secretary terminal.

Then, the telephone number is called at 6 with the predetermined first terminal among the plurality of terminals described above, and in the case of executive / secretary calling, the terminal for the secretary terminal is called, and at 7 the progress after calling the terminal. It is monitored whether the time exceeds a certain time.

When the elapsed time after the first call of the terminal exceeds the fixed time, the terminals in the following next predetermined order among the plurality of terminals described above are called at 8 and the elapsed time after the call of the terminal exceeds a fixed time. It is again monitored whether or not it has been exceeded. Then, the terminal calling according to such a predetermined order and the monitoring of the elapsed time after the calling are repeated, and the terminal of the last rank among the above-mentioned plurality of terminals, the terminal of the executive in the case of the executive / secretary calling control is indicated at 9. The calling is performed without monitoring the elapsed time after the calling.

As described above, according to the present invention, when there is an incoming call at the telephone number assigned to a plurality of terminals, the predetermined calling order is referred to by the central control unit 2 of the telephone exchange system, and the first calling order is followed according to the order. The call signal is transmitted to the terminal. Simultaneously with the sending of the calling signal, the response time of the first terminal is monitored by, for example, a timer provided in the main storage device in the central control unit 2, and if the predetermined time is exceeded, the second terminal calls. Will be done. As a result, a plurality of terminals to which the same telephone number is assigned do not ring at the same time, and the terminals are called in a predetermined order.

〔Example〕

FIG. 2 is a configuration block diagram of an embodiment of the call control system of the present invention. Channel network (NW) in the figure
One switching network, which is composed of time-division switches. CC2 is a central control unit and has a main memory (MM) 10. Further, the terminals 3 and 4 to which the same telephone number is assigned are connected to the communication path network 1 by subscriber circuits (LC) 11 and 12, respectively, and a ringer that supplies a ringer signal to the subscriber circuits 11 and 12. Circuit 13,
Also, there is a trunk circuit 14 between the communication network 1 and the office line.

Here, for simplicity, the case of the above-mentioned executive / secretary call control will be described as an example. When the central control device 2 recognizes an incoming call to a telephone number commonly given to the terminals of the executive A and the secretary B, the central control device 2 indicates the telephone number (DN) to the EN (device number) indicating the accommodation position on the network. ). Then, the subscriber data provided in correspondence with EN is indexed, and it is checked whether a group such as executive / secretary service is registered.

FIG. 3 shows an example of the group table. The figure shows the group registration result of the executive A and the secretary B. Assuming that the device number EN corresponding to the terminal of the executive A is 10, the device number (EN) information of the partner of the executive A, that is, the secretary B at the position of the relative address 10 from the beginning of the group table in FIG. Is stored. The data shows that ENB = 11, the first person to call in this group is B, and its EN is 11. Then, using EN11 of secretary B, if the relative address from the beginning of the group table is 11 and the contents are found, executive A
The EN information ENA = 10 is entered, indicating that there are two members in the group.

The central control unit 2 determines the secretary B as the first calling party from the group table of FIG. 3, drives the switch of the subscriber circuit LC12, and sends the ringing signal from the ringer circuit 13 to the telephone 4 of the secretary B. At the same time, main memory 10
The timer provided in is started.

FIG. 4 shows an embodiment of the contents stored in the main memory 10 for the timer. In FIG. 2, for example, 1,000 terminals are connected to the communication path network 1, and if there are many groups such as the above-mentioned executive / secretarial services between these terminals, the central control unit 2 manages them. There are many timers. Each timer is provided corresponding to the device number (EN), and the data for each timer is composed of a count value of a counter that is periodically subtracted and linkage information indicating the processing order of the timer. Each timer is linked between the head pointer and the tail pointer of the timer, and its value is decremented periodically, for example, every second, and the count value becomes 0.
Those that have become are treated as having timed out.

In FIG. 4, the timer head pointer T at address 000
The contents of MRHP are secretary B's device number ENB. This indicates that the first timer is for Secretary B's terminal. The content of the timer tail pointer TMRTP at address 001 is the device number ENX used by a group other than the above-mentioned executive / secretary group, and indicates that the timer for ENX is the last in the timer link.

The data of the timer for the first secretary B is address 010
The contents of 010 are the count value of the counter, and the contents of 001 are the device number ENC as the link destination information of the next timer, that is, the device number of the member C of the other group. According to the contents of this ENC, the timer data for the member C of another group, that is, the address 012
Is pointed to, and the data of the ENX timer at address 014 is pointed to by the linkage information at address 013. This timer is the last timer in the linkage of the timer as indicated by the timer tail pointer, and the linkage information, that is, the content of the address 015 is 0.

FIG. 5 is an embodiment of the overall flow chart of the call control system of the present invention. In the figure, entry 1 is activated when a number is received when a call arrives at a grouped telephone number. First, step (S)
The dial number DN is converted into a device number EN in 15 and the value of the EN is stored in the variable TGTEN (target device number) in S16, and the value of EN is also stored in the variable GRPER (group device number) in S17. The contents stored in TGTEN and GRPEN in S16 and 17 are 10 in the example of FIG.

Next, the contents of the variable GRPEN, 10 in the example of FIG. 3, are extracted in S18, the group table is indexed using the value 10 in S19, and the device number EN indexed in S20,
In FIG. 3, 11 is stored in the variable GRPEN. And S21
Then, it is determined whether the EN extracted in S20 is equal to the variable TGTEN. Here, since the extraction EN is 11 and TGTEN is 10, the two are not equal, the process branches to the timer activation subroutine in S22, and after the subroutine ends, the ringer activation is performed in S23, and the process ends.

In the entry 2 shown in FIG. 5, that is, the process that is started when the timer times out, first, the ringer for the GRPEN in which the time out occurs in S24 is stopped. In the example of FIG. 3 described above, GRPEN is 11, and the ringer for secretary B is stopped. Then in S18, GRPEN, here 11
Is extracted and the group table is searched using the value in S19. Then, the EN extracted as a result of the search in S20, here 10 is stored in GRPEN, and the E extracted in S20 in S21.
It is determined whether N and TGTEN are equal. Here both
Since it is 10, since it is the same, the ringer is activated in S23 without branching to the timer activation subroutine in S22, and the process ends.

That is, in this embodiment, when the timer for the secretary B times out, the central controller 2 refers to the group table again to select the next call partner, and calls the executive A as the next call partner. Since executive A is the last callee of this group, timing monitoring is not performed and call processing continues until either executive A answers or the caller abandons halfway, whichever event occurs. It

FIG. 6 is a flowchart of an embodiment of S22 in FIG. 5, that is, a timer starting subroutine. When this subroutine is activated, first, the contents of the timer tail pointer TMRTP described in FIG. 4 are extracted in S25, and it is determined in S26 whether the value is 0 or not. If there is even one timer monitored by the central controller 2, then TMRTP
Indicates the device number EN, and if the content is 0, it means that no timer exists. So TMRTP
When is 0, S20 is added to TMRHP and TMPTP in S27 and S28, respectively.
The value of the extracted EN is stored as 11 in the above example,
Return processing is performed.

If TMRTP is not 0 in S26, the linkage has already been set between some timers.
In S29, its contents are extracted from TMRTP, ENX is extracted in Fig. 4, S
At 30 the stored contents for the timer for ENX, here the contents of addresses 014 and 015 are extracted, and at S31 the value of the extracted EN at S20, here 11 is stored as linkage information for that timer at address 015. Then S32
EN is stored in the timer tail pointer TMRTP at, that is, 11 is stored in S33, the count value for the timer for EN = 11 is set at address 016 in FIG.
Cleared as linkage information for this timer in 17,
That is, 0 is stored. The 0 is stored here because this timer is the last timer in the linkage.

FIG. 7 is a detailed flowchart of the timer process that is activated periodically. This process is always cycled within the system, regardless of whether there is an executive / secretary telephone number call, for example. In this processing, the contents of the timer head pointer TMRHP are extracted in S35, and it is determined in S36 whether or not it is zero. In the case of 0, it means that no timer is set in the timer linkage, and the process is terminated.

TMRHP is not 0 in S36, for example, as shown in Fig. 4.
If it is ENB, the address of TMRHP in S37, 000 in FIG. 4 is PRENADR (pre-equipment number address, in the storage area for the timer in the main memory as in FIG. 4) of the timer currently being processed. (This means the address one before in the timer linkage than the address in which the count value is stored). Also S38 TMR HP
The device number, which is ENB in this case, is stored in PROEN (processed equipment number, meaning the device number corresponding to the timer being processed), and the timer corresponding to PROEN is extracted in S39. If the timer corresponding to ENB is taken, it is the timer that is extracted in S39, the count value of which is stored in address 010 and the linkage information (ENC) is stored in address 011.

Then, in S40, it is determined whether or not the count value of the timer, that is, the content of the address 010 is 0. If it is not 0, the count value is decremented by 1 in S41 and PROE is executed in S42.
Address of timer count value corresponding to N + 1 is PREEN
Stored in ADR. Here, the address stored in PREENADR is 011.

If the count value is 0 in S40, it is considered that a timer timeout event has been generated in S43, and P is returned in S44.
The linkage information of the ROEN timer is stored in the address indicated by PREENADR. Here, the timer has timed out, and its linkage information ENC is at address 000.
Will be stored in. This removes the timer from the timer's linkage.

If the timer has timed out, the linkage information of the timer corresponding to PROEN is extracted in S45 after the processing in S44, and if not, in S42.

The linkage timer information extracted here is the timer linkage information, that is, the ENC at address 011 regardless of whether or not the timer times out. And
In S46, it is determined whether or not the content is 0. If it is 0, it means that the linkage of the timer has ended, so the processing ends. If it is not 0, the EN extracted in S38 is P again.
Stored in ROEN. That is, here, ENC is set to PROEN, and the processing from S39 is repeated for the timer for ENC.

When the timer does not time out and the timer times out, the linkage information of the PROEN timer in S44 is ENX, and its contents are stored in PREENADR, that is, address 011. And PRE
The contents of ENADR remain 011 and the processing for the timer is performed. This completely disconnects the timer from the timer linkage. Then, in the processing for the timer, the linkage information for the timer is determined to be 0 in S46, and one timer processing for the timer linkage ends.

〔The invention's effect〕

As described above, according to the present invention, for example, when calling an executive / secretary, it is possible to provide a detailed service without ringing both terminals at the same time, which greatly contributes to improving the office work efficiency of telephone users. .

[Brief description of drawings]

FIG. 1 is a functional block diagram of the present invention, FIG. 2 is a block diagram showing a configuration of an embodiment of a call control system of the present invention, FIG. 3 is a diagram showing an embodiment of a group table, and FIG. FIG. 5 is a diagram showing an embodiment of stored contents in the main storage device, FIG. 5 is a flowchart showing an embodiment of the overall processing of the call control method, FIG. 6 is a flowchart showing an embodiment of a timer starting subroutine, and FIG. FIG. 8 is a diagram showing a flow chart of an embodiment of timer processing, and FIG. 8 is a block diagram showing a conventional example of a private telephone exchange system. 1 ... Channel network, 2 ... Central control unit (C
C), 3, 4 ... Terminal, 10 ... Main storage device.

Claims (1)

(57) [Claims] 1. In a private telephone exchange system having a communication channel network (1) and a central control unit (2), a plurality of line terminals of the communication channel network, which are different from each other, are previously identical to each other. A telephone number assigning means (5) for assigning only one telephone number of the telephone number, and when the telephone number call is detected by the central control unit, the line terminal of the first order predetermined among the plurality of line terminals A first calling means (6), a monitoring means (7) for monitoring whether or not the elapsed time after calling the first line terminal exceeds a certain time, and when the elapsed time exceeds the certain time, Second calling means (8) that repeats calling a line terminal of a predetermined next order among the plurality of line terminals and monitoring the elapsed time after calling the line terminal; A call control system, comprising: a third call means (9) for calling the final line terminal of the plurality of line terminals without monitoring the elapsed time after the line terminal is called. .