JP2809793B2 - Private branch exchange - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a telephone exchange having an automatic callback function.

(Prior Art) Today, one of various service functions added to a private branch exchange system is an automatic callback (hereinafter, referred to as an "automatic callback").
ACB).

This function is used, for example, when any extension telephone A is busy when a dial operation is performed to call another arbitrary extension telephone B or to seize the trunk, and this extension telephone B or the trunk is busy. When the setting is performed, the extension telephone B or the trunk is restored (becomes an idle state), and the extension telephone A is called back. When the extension telephone A responds to the call, the extension telephone A is re-operated without dialing again. This is a function that can automatically call B or seize the trunk.

The operation of the ACB function will be described with reference to FIGS. 6 to 8.

First, FIG. 6 is a flowchart showing the operation up to setting the ACB function.

Extension phone A (DNa) calls the trunk (T
When dialing an access code for capturing RKa) (step 601), it is determined whether or not the TRKa is idle (step 602).

If it is determined that TRKa is busy (busy or the like), a busy tone indicating that fact is sent to DNa (step 603).

At this time, DNa can set the above-described ACB function by pressing the ACB key.

On the other hand, on the private branch exchange side, after transmitting the busy tone,
It is determined whether the ACB key has been pressed with DNa (step 604).

Here, when it is determined that the DNa has pressed the ACB key, a memory table T for storing the DN in which the ACB function is set is stored in the memory having the configuration shown in FIGS. 8 (a) and 8 (b).
1 free area MEMT1 contains DNa, ACB function set DN stores TRKa in MEMT2 of memory table T2 that stores DN, and ACB
ACB by storing the type of DN for which the function is set (to distinguish whether TRK is an extension) in MEMT3 of memory table T3
The function is set (step 605).

After that, dial tone is sent to DNa and A
The fact that the CB function has been set is notified (step 606), and the process ends.

If TRKa is idle in step 602, this TRKa is connected to DNa (step 607), and then this DN is further connected to DNa.
A completion of the connection is notified by sending a dial tone to a (step 608).

The operation after setting the ACB function is performed according to the flowchart shown in FIG.

First, when the TRKa is restored and becomes idle (step 701), the memory table T2 and the memory table T3 [eighth
It is searched whether or not the above-mentioned TRKa is registered in the corresponding memory in FIG.
It is determined whether the B function is set (step 7
02).

When the ACB function is set in the TRKa, the extension DNa with the ACB function set is obtained from MEMT1 of the memory table T1 (see FIG. 8A), and it is further checked whether or not this DNa is idle (step 703). ).

Then, when the DNa for which the ACB function is set is idle, the DNa is called back (step 704).

Thereafter, it is monitored whether or not the DNa has responded to the above-mentioned call within a predetermined time (steps 705 and 706).

When the DNa responds within a certain time, the stored data is stored from the corresponding memory in the memory tables T1, T2, and T3.
After deleting the DNa, TRKa, and DN Type to release the ACB function (step 708), the DNa for which the function was set and the restored TRKa
Are connected (step 709), and the process ends.

If DNa does not respond to the above-mentioned call back after a certain period of time, the ACB function is immediately released without performing the connection as in step 709 (step 707).

According to the ACB function described above, the calling terminal that has set the function can call a desired extension telephone or seize the trunk simply by responding to the call back (ACB call back) relating to the function. This is certainly convenient in that each object is busy, so that the trouble of repeatedly making a call operation can be reduced.

However, the ACB function added to this type of conventional private branch exchange, for example, when the function is set for a trunk, only captures the trunk when responding to the ACB call back, and the subsequent dialing operation is The operator himself had to do it manually.

(Problems to be Solved by the Invention) As described above, in the ACB function added to the conventional private branch exchange, when the function is set for a trunk,
After responding to the B-call back, the trunk is merely seized, and dialing for the office line still has to be performed manually, which causes a problem of low operability.

The present invention eliminates this problem and provides ACB for trunks.
After setting the function, it can automatically process from the capture of the above trunk accompanying the ACB call back response to the dial transmission to the trunk line corresponding to the trunk, a service that greatly reduces the calling operation related to the ACB function It is an object of the present invention to provide a highly reliable telephone exchange device.

[Configuration of the invention]

(Means for Solving the Problems) In order to achieve the above object, the invention of claim (1)
In a telephone exchange device interposed between extension telephone terminals or between an extension telephone terminal and an office line and having an automatic callback function, the automatic callback function for any trunk circuit connected to the office line from a calling terminal. Setting means for setting, dial number registration means in which a dial number is registered, and after restoration of the trunk circuit in which the automatic callback function is set,
The trunk circuit is connected to the originating terminal of the setting source, the calling terminal is called back, and a response of the calling terminal to the call back is waited, and the dialing is performed for the office line corresponding to the trunk circuit. Automatic dial transmission means for transmitting a dial number registered in the number registration means.

According to the invention of claim (2), in the invention of claim (1), the setting means continuously transmits the calling line terminal to set the automatic callback function for an arbitrary trunk circuit to the station line. Notification means for notifying that registration of a dial to be transmitted is possible, and registration of a dial number input from the calling terminal in response to notification from the notification means to the dial number registration means. And registration control means.

The invention according to claim (3) is characterized in that, in the invention according to claim (1), when the calling terminal does not respond within a predetermined time to the call back of the calling terminal by the automatic dial sending means, the automatic transmission is performed. It is characterized by comprising a release means for releasing the callback function.

According to a fourth aspect of the present invention, there is provided a telephone exchange having at least one extension telephone terminal and having an automatic callback function, wherein the automatic call is performed with respect to an arbitrary trunk circuit connected from the originating terminal to the office line. Setting means for setting a back function, dial number registering means for registering a dial number, and, after restoration of the trunk circuit in which the automatic callback function is set, connection between the trunk circuit and the originating terminal as a setting source Call back the calling terminal, wait for the response of the calling terminal to the call back, and transmit the dial number registered in the dial number registration means to the office line corresponding to the trunk circuit. And automatic dial sending means.

The invention according to claim (5) is the invention according to claim (4), wherein the setting means continuously transmits the call to the originating terminal for setting the automatic callback function for an arbitrary trunk circuit to the central office line. Notification means for notifying that registration of a dial to be transmitted is possible, and registration of a dial number input from the calling terminal in response to notification from the notification means to the dial number registration means. And registration control means.

The invention of claim (6) is based on the invention of claim (4), wherein, if the calling terminal does not respond within a predetermined time to the call back of the calling terminal by the automatic dial sending means, the automatic transmission It is characterized by comprising a release means for releasing the callback function.

(Operation) In the present invention, in a telephone exchange device interposed between extension telephone terminals or between an extension telephone terminal and a central office, or in a telephone exchange device having at least one extension telephone terminal, when calling to a destination terminal, When the trunk circuit is in use, an automatic callback function is set for the trunk circuit from the calling terminal, and after the trunk circuit is restored, the trunk circuit is connected to the originating terminal of the setting source. The calling side terminal is called back, and after waiting for a response of the calling side terminal to this call back, the dial number registered in the dial number registration means is transmitted to the office line corresponding to the trunk circuit.

Therefore, when the trunk circuit is in use, if an automatic callback function is set for the trunk circuit from the calling terminal, the originating terminal at the registration source is called back when the trunk circuit is restored. It is possible to make a call to the destination terminal simply by responding to the return by the calling terminal.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the entire configuration of a private branch exchange according to the present invention.

In FIG. 1, an electronic key telephone (EKT) 1a to 1m
Are connected to a communication path network (SW) 3 via line circuits (LC) 2a to 2m, respectively.

The line circuits 2a to 2m and the communication path network 3 are connected to a central processing unit (CC) 6 via a control data bus line 5 together with local trunk circuits (TRK) 4a to 4n.

The central processing unit 6 sends and receives control data to and from the storage device (MEM) 7, thereby connecting between the EKTs 1 a to 1 m and between the EKTs 1 a to 1 m via the communication network 3 and the local line (trunk circuit).
4a to 4n) is controlled.

Here, the EKTs 1a to 1m have an appearance structure as shown in FIG. 2, and include a handset 11, its hook mechanism 12, and a dial key 1.
3. It has various service keys 14 and so on.

The various service keys 14 include an ACB key 14a for setting and canceling the ACB function.

The operation of the private branch exchange having such a configuration when the EKT 1a calls the EKT 1m as another extension terminal will be described.

When the EKT 1a makes a call for the EKT 1m, the call information is transmitted to the central processing unit 6 through the line circuit 2a.

The central processing unit 6 sends a dial tone to the EKT 1a to notify the operator of the EKT 1a that the dialing is possible when the call path network 3 is in a state in which the route network can be connected to the call information.

When the operator confirms the dial tone and performs a prescribed dial operation, the dial information input from the EKT 1a is supplied to the central processing unit 6 again through the line circuit 2a.

When the central processing unit 6 receives the required number of digits of the dial information, the central processing unit 6 determines whether the connection is between extensions or a local line.

If the dial destination is an extension, it is checked whether the destination terminal is empty.

When it is vacant, a ringing tone is sent to the destination terminal and a ringback tone is sent to the calling terminal.

On the other hand, in the case of the office line connection, an empty trunk is selected, and the calling terminal is connected to the empty trunk.

The above is a description of a normal call operation that does not depend on the ACB function.

Next, the operation regarding the ACB function that can be arbitrarily set when the extension or the office line is busy at the time of the above-mentioned call will be described.

First, the operation up to the setting of the ACB function is performed according to the flowchart of FIG.

When making a call in consideration of the ACB function, the extension telephone A (any one of DNa: EKT1a to 1m) as the calling terminal first dials the access code of the TRKa (any one of the trunk circuits 4a to 4n) to be captured. (Step 301).

When given the access code, the central processing unit 6 checks whether or not the TRKa corresponding to the access code is idle (step 302). If not, the central processing unit 6 sends a busy tone to DNa through the above route (step 303). .

Here, the DNA operator selects TRK from the above busy tone.
When the user knows that a is busy and needs to set the ACB function, the user presses the ACB key 14a (see FIG. 2).

The central processing unit 6 takes in the input information from DNa accompanying this operation through the above-mentioned route, and determines whether or not the ACB key 14a has been pressed (step 304).

If it is determined that the ACB key 14a has been pressed, the ACB function is set by the method described below (step 3).
05).

That is, the central processing unit 6 is configured as shown in FIGS.
Of the memory tables T1 and T2 having the memory configuration (in the storage device 7) as shown in FIG.
The DNa of which the ACB key 14a is pressed is registered in the memory table T2, and the memory tables T2, TMEM2,
Register the busy TRKa and DN Type (a flag for distinguishing between TRK and extension) in MEMT3.

Subsequently, the central processing unit 6 sends a special dial tone to the DNa (step 306) to inform the operator of the DNa that the dial to be sent to the central office can be registered.

The DNa operator who knows this inputs a dial to be sent to the office line (step 307), and dials an access code indicating that when the dial input is completed.

On the other hand, the central processing unit 6 pays attention to the access code, and determines whether or not the input of the dial to be transmitted to the office line is completed within a predetermined time (step 308).

Here, when it is determined that the dial input is completed, the central processing unit 6 then stores the input dial data in the storage device 7 in the form shown in FIG. (Step 30
9).

At this time, the central processing unit 6 sends a dial tone to DNa (step 310), and notifies that the dial registration related to the ACB function has been performed.

If it is determined in step 308 that the input is not completed within a predetermined time, the central processing unit 6 sends an overflow tone to DNa (step 311) to notify that the dial registration related to the ACB function could not be performed. .

If the TRKa is idle in step 302, the central processing unit 6 immediately connects the DNa to the designated TRKa (step 312), and further, dial input is possible by sending a dial tone to the DNa. Is notified (step 313).

Next, the operation after setting the ACB function will be described with reference to the flowchart shown in FIG.

In other words, the central processing unit 6 sets the T in the ACB function setting state.
When the RKa becomes idle (step 401), it is checked whether the TRKa is registered in the memory tables T2 and T3 (see FIG. 5), and it is determined whether the ACB function is set (step 401). 402).

If TRKa is found at the position of Index A and it is determined that the ACB function is set,
From the memory MEMT1 at the position of Index A, a DNa with the ACB function set is obtained, and it is checked whether or not the DNa is idle (step 403).

When the DNa is idle, the central processing unit 6 calls back the DNa (step 404).

Subsequently, the central processing unit 6 responds to the above call back with the DN.
Monitor whether a responded within a certain time (step 4
05, 406), when a response is made within the predetermined time, the responded DNa and TRKa are connected (step 408).

After that, the central processing unit 6 reads the Index of the memory table T4.
It is checked whether or not the dial to be transmitted to the office line is registered in the memory MEMT4 at the position A (step 409).

Here, the central processing unit 6 is configured such that the top memory of the MEMT 4 is O
When it is determined that there is no FF H and that there is a registration, the registered dial is transmitted to the central office through the TRKa (step 410).

With such control, in the present invention, DNa with the ACB function set
After that, the user can access the target destination terminal only by responding to the ACB call back, and can save the trouble of further dialing after the response as in the related art.

After performing the automatic dial transmission in this manner, the central processing unit 6 clears the data stored in each memory area of the memory tables T1, T2, T3, and T4 in the storage device 7, and
The B function is canceled (step 411).

The release processing of the ACB function is performed in steps 405 and 406.
Is not executed within a certain period of time in response to the call back (step 407).

In step 409, if no dial is stored in MEMT4 of the memory table T4 of the storage device 7, that is, if the head memory of MEMT4 is OFF H, the central processing unit 6 does not send the dial to the office line.

In this case, the central processing unit 6 urges the DNa to input a dial to be transmitted to the central office line as before, and waits for the input to transmit the dial.

〔The invention's effect〕

As described above, according to the present invention, in a telephone exchange device interposed between extension telephone terminals or between an extension telephone terminal and an office line, or in a telephone exchange device having at least one extension telephone terminal, a destination terminal When the outgoing call is made to the trunk circuit, if the trunk circuit is in use, the calling terminal has set an automatic callback function for the trunk circuit. After the connection, the calling terminal is called back, and after waiting for a response of the calling terminal to this call back,
Since the dial number registered in the dial number registration means is transmitted to the office line corresponding to the trunk circuit, when the trunk circuit is in use, an automatic call back function is set from the calling terminal to the trunk circuit. If the trunk circuit is restored, the originating terminal of the registration source is called back when the trunk circuit is restored, and it is possible to make a call to the destination terminal simply by responding to this call back by the calling terminal. There is an advantage that the operability of the calling operation at the time of using can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an entire configuration of a private branch exchange according to the present invention, FIG. 2 is an external view showing an example of an extension telephone housed in the private branch exchange shown in FIG. 1, and FIG. FIG. 4 is a flowchart showing an example of the operation up to the setting of the ACB function in the private branch exchange. FIG.
FIG. 5 is a flowchart showing an example of an operation after setting an ACB function, FIG. 5 is a memory configuration diagram in a storage device in the private branch exchange of the present invention, FIG. 6 is a flowchart showing operations up to the setting of the ACB function in a conventional private branch exchange; FIG. 7 is a flowchart showing the operation after setting the ACB function in the conventional private branch exchange, and FIG. 8 is a memory configuration diagram in the conventional private branch exchange. 1a to 1m: Electronic key telephone (EKT), 2a to 2m: Line circuit (LC), 3: Communication channel network (SW), 4a
~ 4n ... trunk line circuit (TRK), 5 ... control data bus line, 6 ... central processing unit (CC), 7 ... storage device (MEM), 11 ... handset, 12 ... hook mechanism ,13…
… Dial key, 14 …… Service keys, 14a …… ACB
Key

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-51-132708 (JP, A) JP-A-61-236264 (JP, A) JP-A-61-238155 (JP, A) JP-A-62 217758 (JP, A) JP-A-1-160247 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04M 3/42 H04M 3/44 H04M 3/58 H04M 1/00

Claims (6)

(57) [Claims] 1. A telephone exchange device having an automatic callback function interposed between an extension telephone terminal or between an extension telephone terminal and an office line, wherein an arbitrary trunk circuit connected from an originating terminal to the office line is provided. Setting means for setting the automatic callback function; dial number registration means for registering a dial number; and after restoration of the trunk circuit in which the automatic callback function has been set, the trunk circuit and the originating side of the setting source Connecting the terminal, calling back the calling terminal, waiting for a response of the calling terminal to the call back, and dialing the telephone number corresponding to the trunk circuit registered in the dial number registering means. And an automatic dial sending means for sending a call. 2. A notifying device for notifying a calling terminal that is to set the automatic callback function for an arbitrary trunk circuit that registration of a dial to be transmitted to the central office line is possible. Means, and registration control means for enabling registration of the dial number input from the calling terminal in response to the notification from the notification means in the dial number registration means. (1) The telephone exchange device according to (1). 3. A system according to claim 2, further comprising a canceling means for canceling the automatic callback function when the calling terminal does not respond within a predetermined time to the calling back of the calling terminal by the automatic dial sending means. The telephone exchange according to claim 1. 4. A telephone exchange having at least one extension telephone terminal and having an automatic callback function, wherein a setting for setting the automatic callback function for an arbitrary trunk circuit connected to the office line from a calling terminal. Means, dial number registration means for registering a dial number, and after restoration of the trunk circuit in which the automatic callback function is set, the trunk circuit is connected to the originating terminal of the setting source, and Automatic dialing means for calling back a terminal, waiting for the response of the calling side terminal to the calling back, and sending out the dial number registered in the dial number registering means to the office line corresponding to the trunk circuit. A telephone exchange device comprising: 5. A notifying device for notifying a calling terminal that is to set the automatic callback function for an arbitrary trunk circuit that registration of a dial to be continuously transmitted to the central office line is possible. Means, and registration control means for enabling registration of the dial number input from the calling terminal in response to the notification from the notification means in the dial number registration means. (4) The telephone exchange as described above. 6. A system according to claim 1, further comprising a canceling means for canceling the automatic callback function when the calling terminal does not respond within a predetermined time period in response to the call back of the calling terminal by the automatic dial sending means. The telephone exchange according to claim 4, wherein