JPH03201653A - Call forward system for private exchange - Google Patents

Abstract

PURPOSE:To select an incoming call, which desires transfer, or an incoming call not to desire transfer by collating a subscriber number, which is informed from a digital-integrated service network when the call is terminated, on a call originating side with a subscriber number in a storing means and deciding it corresponding to the result of this collation whether the incoming call is transferred or not. CONSTITUTION:A storing means 8 is provided to register the subscriber number corresponding to a prescribed terminal, and a collating means 6 is provided to collate the subscriber, number, which is informed from a digital-integrated service network 3 when the call is terminated to the prescribed terminal, on the call originating side with the subscriber number in the storing means 8. Then, a deciding means 6 is provided to decide it corresponding to the result of this collating means 6 whether transfer is executed or not. Thus, the incoming call to desire transfer or the incoming call not to desire transfer can be easily selected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a call forwarding method in a private branch exchange connected to a digital integrated service network.

(Prior Art) In recent years, private branch exchanges have been provided with various service functions, one of which is a function called call forward and 11f. This call forward function is such that when a desired terminal is specified 17 as a transfer destination of a predetermined terminal, incoming calls to the predetermined terminal are transferred to the other terminal.

With this, for example, when a user of a predetermined terminal moves to another location such as a conference room, if you specify a terminal in the conference room as the transfer destination of the predetermined terminal, this "user Z"
It becomes possible to respond to an incoming call to the predetermined terminal using a terminal in the conference room.

However, in the past, this call forward function was
Generally speaking, all incoming ξl=F for a given terminal is transferred to another terminal, which is not necessarily convenient for users. For example, when attending a conference or conference, you may specify a terminal in the conference room to answer a call from a specific Shinshu station that you have agreed upon in advance. 0. Not only the incoming calls that were promised earlier, but also all the incoming calls to the predetermined terminal will be transferred to the terminal in the conference room, so there is a risk that the meeting will be frequently interrupted. there were.

(Problem to be solved by the invention) In this way, when the call forward function is set in a conventional private branch exchange, all incoming calls to a given terminal are forwarded to other terminals, and the incoming calls to be forwarded are selected. Therefore, there was a problem in that it was not necessarily convenient for users.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a call forwarding method in a private branch exchange that allows selecting incoming calls to be forwarded.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides an in-premises system that is connected to a digital integrated service network and has a call forward function that forwards incoming calls to a predetermined terminal to another predetermined terminal 7. The exchange includes a storage means for registering a subscriber number corresponding to the predetermined terminal, and a storage means for registering the subscriber number of the calling side notified from the digital integrated service network, especially if the incoming IIf to the predetermined terminal is registered in the storage means. The present invention is characterized by comprising a verification means for verifying the subscriber number, and a 1'11 determination means for determining whether or not to perform transfer based on the result of the verification means.

(Function) According to the present invention, the subscriber number of the calling party notified from the digital integrated service network in 1.1 of the incoming call is explicitly included as the subscriber number in the storage means, and the fl 11
Since it is determined whether or not to transfer f, it is possible to select the destination lIf to which the transfer is desired or the destination 11i1 to which the transfer is not desired.

(Examples) Hereinafter, please refer to the attached drawings for examples of the present invention! 1((This will be explained in detail below.

FIG. 1 is a block diagram showing a private branch exchange to which a one-sided embodiment of the call forward method according to the present invention is applied. In the figure, each extension telephone 1-1 to 1-n is, for example, an electronic key telephone, and each extension telephone 2-1 to 2-il is an electronic key telephone.
are respectively connected to the communication path network 3 via. Each trunk circuit 4-1 to 4-m has a communication function for the digital integrated service network (hereinafter referred to as FISDN), and each trunk circuit 4-1 to 4-m has a communication function for the digital integrated service network (hereinafter referred to as FISDN).
This is an interface that connects to the escape route network 3. The communication path network 3 enables exchange connections between trunk circuits and line circuits to enable office line calls between extension telephones and office lines, and exchange connections between each line circuit to enable extension calls between extension telephones. enable. The central processing unit 6 can access a storage device 8 via a control data bus 7, and according to the operating program and control data in this storage device 8 controls the exchange connections made in the communication path network 3, and controls each line. Data is transmitted and received between the circuit and each trunk circuit via a control data bus 7. The relay stand 9 is connected to the central processing unit 6, and is used to manually instruct the central processing unit 6 to forward incoming calls from the central office line to the extension line.

FIG. 2 shows the appearance of each of the extension telephones 1-1 to 1-n, which are electronic key telephones as described above. In the figure, a hook mechanism 11 is used to place a handset 12, and a button is used as a dial key 13 for dialing. The plurality of service keys 14-1 to 14-j are for manually instructing various service functions, and these service keys 1
When a desired service is specified by pressing any one of 4-1 to 14-j, χ・1 is displayed on the pressed service key of each indicator 1-1 lamp 15-1 to 15-j. The corresponding indicator lamp lights up.

The operation of setting the call forward function and dividing the angle q by operating such an electric key telephone will be described below according to the flowchart of FIG. In addition,
Here, for example, it is assumed that the call forward function is set on the extension telephone 11 and divided by the angle q. Further, when the call forward function is set, the extension telephone 1-n is designated as the forwarding destination of the incoming call to the extension telephone 1-1. Further, it is assumed that in response to the operation of the extension telephone 1-1, a data signal corresponding to the operation is transmitted to the central processing unit 6 via the line circuit 2-1 and the control data bus 7.

First, when the service key 14-1 (hereinafter referred to as the CFD key) corresponding to the call forward function (hereinafter referred to as the CFD function) is pressed among the service keys of the extension telephone 1-1, the central processing unit 6 Upon detecting that the CFD key No. 1 has been pressed (step 101), control for setting and canceling the call forward function for the extension telephone 1-1 is started. At this time, the central processing unit 6 waits for another key input from the extension telephone 1-1 (step 102).

Here, press dial key 13 of extension telephone 1-1 to
Assume that the extension number of the transfer destination, that is, the extension number (for example, 201) of the extension telephone 1-n, is manually entered by 11II'i. In this case, when the central processing unit 6 detects the first digit 11 "2", it determines that the dial key is manually operated.
Step 11) 03), this "2" is temporarily stored in the storage device 8 as the first digit (step 104), and the next digit is awaited (step 105). Subsequently, when the central processing unit 6 detects the two digits 11 "0", it determines that the dial key was manually operated (step 106), and temporarily stores this "()" in the storage device 8 as the two digits [1]. hand(
Step 107), and waits for input of the next digit (Step 105).Furthermore, the central processing unit 6 inputs 3 digits 11 "1".
If the manual dial key is 111, step 1
06), this “1” is assumed to be a 3-digit “1”, and m is stored in the storage device 8.
- Store (step 107) and wait for the next digit of human power (step 105).

Therefore, the storage device 8 stores the extension telephone 1 which is the transfer destination.
-11's extension number "201'" will be stored in -Q.

Next, when the CFD key of the extension telephone 1-1 is pressed, the central processing unit 6 determines that the CFD key is manually operated (Step 106), and the CFD shown in FIG.
Step 1: Clear the address (#1) section assigned to extension telephone 1-1 in table 81 by -Lj.
08), and stores the transfer destination extension number "201" here (step 109).

This means that the extension telephone 1-n to which the incoming call to the extension telephone 1-1 is to be transferred has been registered.

The central processing unit 6 waits for further human power from the extension telephone 1-1 (step 110), and when, for example, the human power for the CFD key is available (step 111), this process ends.

In this case, the transfer destination extension telephone 1. - Only registration of extension phone 1-1 has been performed, and if the call forward function is activated in this state, extension telephone 1-1 will be registered as described later.
All incoming calls to extension 1. − will be forwarded to n.

On the other hand, when there is a key input from the extension telephone 1-1 in step 111, the central processing unit 6 moves to step 112.

Here, by operating the dial key 13 of the extension telephone 1-1, the subscriber number of the desired calling party (for example, 86
1111) are sequentially performed manually.

In this case, when the central processing unit 6 detects the first digit "8", it determines that the dial key is manually operated.
11), temporarily store this "8" in the storage device 8 as the first digit (step 112), and wait for the next digit's human power (
Step 113). Subsequently, when the central processing unit 6 detects the second digit "6", it determines that the dial key was manually operated (step 114), and stores this "6" as the second digit in the storage device 8 as -44. (Step 115), and waits for the next digit of human power (Step 113). Thereafter, in the same way, each step 113 to 115 is performed for each dial key manually.
The processes up to this point are repeated, and as a result, the desired calling party's subscriber number "861111" is once stored in the storage device 8.

After this, press the CFD key on extension telephone 1-1.
When the central processing unit 6 inputs the CFD key (step 11.4), the central processing unit 6 selects the subscriber extension telephone 1-1 in the subscriber number table 82 shown in FIG. 5 in the storage device 8.
Access the section α of the address (#1) allocated to , and register the subscriber number "861111" there (Step 1] 6).

In this way, the subscriber number of the desired calling party manually entered from the extension telephone 1-1 is registered.

Again, the central processing unit 6 waits for human power from the extension telephone 1-1 (step 117), and for example, when the human power of the CFD key lights up (step 118), this process ends.

In addition, when there is a keystroke on the dial key 13 from the extension telephone 1-1 in Step 1]8, the central processing unit 6 repeats the processes from Steps 112 to 115, and as a result, the two You will need to register your subscriber number. In this case, the fifth
Another address (#i-) assigned to extension telephone 1-1 in the subscriber number table 82 shown in the figure is accessed, and two [ ] subscriber numbers are registered there. Ru.

Further, when there is the CFD key in step 118, the processes from steps 112 to 115 are repeated, so that the subscriber number table 82 shown in FIG. A plurality of desired caller subscriber numbers can be registered corresponding to 1.

Note that after the CFD key is pressed in step 101, when the CFD key is pressed again in step 103, the address assigned to extension telephone 1-1 in the CFD table 81 shown in FIG. The field 112 is cleared, and the extension number of the transfer destination χ·1 to the extension telephone 1-1 is deleted. Also, if any key other than the CFD key or dial key is pressed in each of steps 111, 114 and 118, the extension number of the forwarding destination is changed to χ・1 to the extension telephone 1-1 stored in the CFD table 81. is extinguished. Furthermore, CFD in previous step 1.01
If a key other than the CFD key or dial key is pressed in step 103 after the key is pressed, the process ends without setting or canceling the call forward function.

To describe the above-mentioned pincers and their effects with reference to the diagram in Figure 6, first press the CFD key once and input the extension number for Transfer-S, then press the CFn key twice. The extension number of the transfer destination is registered. Also, press the CFD key once to manually input the extension number of the transfer destination, and then continue to CF
By repeating the single press of the D key and the input of the desired calling party's subscriber number, followed by the second press of the CFD key,
The forwarding destination extension number is registered and one or more subscriber numbers may be registered. Furthermore, CFD
If the key is pressed twice, the registered extension number will be deleted.

Next, the operation by setting such a call forward function will be described according to the flowchart of FIG.

First, for example, if an incoming call from 15DN is on the trunk circuit 4-1 through the central office line 5-1, the 11 central processing unit 6 detects this incoming call through the trunk circuit 4-1 (
Step 201). Here, whether this incoming call is extension phone 1-
If it is for 1, the central office Pl! The equipment reviewer 6 refers to the CFD table 81 shown in FIG. 4 in the storage device 8 to determine whether a transfer destination for the extension telephone 1-1 has been set or not (step 202). For example, if a transfer destination for extension telephone 1-1 is not set, central processing unit 6 calls extension telephone 1-1 through line circuit 2-1 (step 203). When extension telephone 1-1 answers this call, central part F1! The device 6 connects the line circuit 2-1 and the four trunk lines 4-1 via the communication path network 3, thereby connecting the extension telephone 1-
1 to the central office line 5-1.

In this way, 1'l? If the forwarding destination of the li telephone 1-1 is not registered, as shown in FIG. will not be forwarded to.

Further, if it is determined in step 202 that the forwarding destination of the extension telephone 1-1 is set for the CFD table 8 in the storage device 8, the central processing unit 6 performs the transfer as shown in FIG. By referring to the subscriber number table 82, it is determined whether the desired caller's subscriber number has been set corresponding to the extension telephone 1-1 (step 204). For example, If the desired calling party subscriber number is not set corresponding to the extension telephone 1-1, the central processing unit 6 stores the CFD table 8 in the storage device 8.
The extension number "201" of the forwarding destination is read out from the address (#) assigned to the extension telephone 1-1 in step 1 (step 205).Then, the central processing unit 6 reads this extension number. Call the extension telephone 1-n indicated by "201" through the line circuit 2-n (step 2
06). When extension telephone 1-n answers this call,
The central processing unit 6 has a line circuit 2-11 and a trunk circuit 4.
-1 through the communication path network 3, thereby enabling a call from the extension telephone 1n to the central office line 5-1.

In this way, if extension telephone 1-n has already been registered as the forwarding destination for extension telephone 1-1, and the subscriber number of the calling party has not been registered corresponding to extension telephone 1-1,
As shown in (b) of the figure, all incoming calls to extension telephone 1-1 are transferred to extension telephone 1. − will be forwarded to n.

Furthermore, in step 204, the extension telephone 11 is
If it is determined that the subscriber number has been registered, the central processing unit 6 determines whether the calling party's subscriber number has been transmitted from the 15DN to the trunk circuit 4-1 via the central office line 5-1. It is determined whether or not (step 207). For example, if the calling party's subscriber number has not been transmitted from l5DN, the central f'l device 6 sends the extension telephone 1-1 to j'l'rl-IL through the line circuit 2-1 (step 203). , When the extension telephone 1-1 responds to this call t11, an exchange connection is established between the line circuit 2-1 and the rank circuit 4-1, thereby connecting the central office line 51 from the extension telephone 1-1 with phone calls. Therefore, incoming calls to extension telephone 1-1 are not transferred to other terminals, but are received there.

Further, if it is determined in step 207 that the subscriber number of the calling side has been transmitted from the 15DN, the central processing unit 6 The number is retrieved from the trunk circuit 4-1 (step 208), and the subscriber number (for example, 861111) is retrieved from the address area assigned to the national line telephone 1-1 in the subscriber number table 82 in the storage device 8.
Read out.

At this time, if a plurality of subscriber numbers are registered in the storage device 8 corresponding to the extension telephone 1-1, all of these subscriber numbers are read out. And the central office PI! 'Device 6
compares the subscriber number received from the 15DN with each registered subscriber number one by one, and determines whether the received subscriber number matches any of the registered subscriber numbers (step 209). Here, if the received subscriber number does not match any of the registered and stored subscriber numbers, the central processing unit 6
-1 to call extension 1-1 Step 20
3) When the extension telephone 1-1 responds to this call, an exchange connection is established between the line route 2-1 and the trunk circuit 4-1, thereby making it possible to make a call using the extension telephone 1-1.

Therefore, incoming calls to extension telephone 1-1 are not transferred to other terminals.

Further, if the subscriber number received in step 20 matches any of the registered subscriber numbers, the central processing unit 6 stores the CFD table 8 in the storage device 8.
1 to the forwarding destination extension number corresponding to extension telephone 1-1"
201" (step 205), and this extension number "
201" is called through the line circuit 2-n (step 206). When the extension telephone 1-n responds to this call, the line circuit 2-n is called.
The trunk circuit 4-1 is connected to the trunk circuit 4-1 via the communication path network 3, thereby enabling a call from the outgoing telephone 1-n to the central office line 5-1.

In this way, if extension telephone 1-n is specified as the forwarding destination of extension telephone 1-1, and a desired subscriber number is registered corresponding to extension telephone 1-1, IS,
Only when the subscriber number received from the DN matches the registered subscriber number, the incoming call to the extension telephone 1-1 is transferred to the forwarding destination extension telephone 1-11. Also, l5D
If the subscriber number received from N does not match the registered subscriber number, the incoming call to extension telephone 1-1 cannot be transferred and 1, II! The telephone 1-1 receives the incoming call.

In this embodiment, if a desired subscriber number is registered corresponding to the extension telephone 1-1, when a call is received to the extension telephone 1-1, the subscriber number of the calling party received from the 15DN is registered. only if it matches an already registered subscriber number.
Since the incoming call is forwarded to the forwarding destination extension telephone 1-n, not all incoming calls to the extension telephone 1-1 are forwarded, and only incoming calls from the desired calling party are selectively forwarded. will be transferred to.

Note that in the above embodiment, the incoming call is forwarded to the forwarding destination when the subscriber number of the calling party received from the 15DN matches the registered subscriber number, but the present invention is not limited to this. , the incoming call may not be forwarded when the subscriber numbers of both parties match, and the incoming call may be forwarded when they do not match.

In addition to registering multiple desired subscriber numbers,
You may register multiple extension numbers for transfer destinations. In this fund, each subscriber number is associated with each forwarding destination's 1-> line number, and when a call is received from a caller having one of these subscriber numbers. In some cases, if the incoming call is transferred to a terminal having a forwarding extension number corresponding to the subscriber number, incoming calls from each caller having each subscriber number can be forwarded to the forwarding destination. It can be distributed and transferred to each terminal.

Furthermore, if a private branch exchange handles multiple terminals as one group, and this group is given a group number similar to an extension number, such as ``1'', the group can be called using this group number. , 1 as the forwarding destination
Instead of specifying each terminal one by one, a group number may be specified as a transfer destination, and incoming calls may be transferred to each terminal in the group. Alternatively, one group may be used as a transfer source, and each incoming call to each terminal within this group may be transferred to another terminal or another group.

[Effects of the Invention] As explained above, according to the call forward method according to the present invention, when a call arrives, the subscriber number of the calling party notified from the digital integrated service network is checked against the subscriber number in the storage means, Since it is determined whether or not to transfer the incoming call according to the verification result, it is possible to select the incoming call to be transferred or the 11 cases in which the incoming call is not desired to be transferred.

[Brief explanation of drawings]

1 is a block diagram showing a private branch exchange to which an embodiment of the call forward system according to the present invention is applied; FIG. 2 is a plan view showing an extension telephone in the embodiment shown in FIG. 1;
3 is a flowchart used to explain the operation of setting and canceling the call forward function in the embodiment shown in FIG. 1, and FIG. 4 is a CFD in the storage device in the embodiment shown in FIG. 1. FIG. 5 is a diagram showing a subscriber number table in the storage device in the embodiment shown in FIG. 1, and FIG. 6 is an input operation N of the call forward function in the embodiment shown in FIG. 1. 7 is a flowchart used to explain the operation of the call forward function in the embodiment shown in FIG. 1, and FIG. 8 is a flowchart used to explain the operation of the call forward function in the embodiment shown in FIG. FIG. 3 is a diagram used to explain a call transfer mode. 1-1~1. - n...Extension telephone 1-1.2-1~
2-n...line circuit, 3...communication path network, 4-1 to 4-m...trunk circuit, 5-1 to 5-
m... h6 line, 6... central processing'A position, 7... control data bus, 3... storage device, 0... relay stand, 1
1... Hook mechanism, 12... Transmission/reception 2 113...
・Dial keys 14-1 to 14-j...Service keys 15-1 to 15-j...Indicator lamps, 8
1...CFD table, 82...Subscriber number table. Figure 2 Figure 4 Figure 5 Figure 6 Figure 7

Claims (2)

[Claims] (1) Register a subscriber number corresponding to the predetermined terminal in a private branch exchange that is connected to the digital integrated service network and has a call forward function that forwards incoming calls to a predetermined terminal to another predetermined terminal. a storage means for comparing a subscriber number of a calling party notified from the digital integrated service network when a call is received to the predetermined terminal with a subscriber number in the storage means; A call forwarding method in a private branch exchange, comprising: a determining means for determining whether or not to perform forwarding according to the request. (2) The storage means stores a plurality of subscriber numbers corresponding to a predetermined terminal, and the verification means sequentially matches the subscriber number of the calling party notified at the time of incoming call with the plurality of subscriber numbers in the storage means. The call forwarding method in a private branch exchange according to claim 1, wherein the call forwarding method is performed in a private branch exchange.