JPS63111748A - Absence transfer system varied with call service class - Google Patents

Abstract

PURPOSE:To transfer only a call requiring transfer by providing a means commanding the propriety of transfer depending on kinds of an incoming call. CONSTITUTION:When an extension subscriber leaves its seat, the subscriber dials a special number from a telephone set (4A, 4B, 4C) of its own seat and uses an absence transfer means 23 varied with call service class of a central controller 2 to register the propriety of transfer of a transfer destination extension number and a transfer destination extension number with respect to an incoming call onto an absence transfer propriety list 32 varied with call service class of a main storage device 3. In this state, when the central controller 2 is started by an incoming call, an absence transfer means 23 is activated and the transfer propriety list 32 is read to discriminate whether or not an incoming extension number is registered as the transfer destination extension number and in case of the registration, whether or not the call class is permitted for the transfer is discriminated. In case it is allowed, the connection processing to the transfer destination extension number is applied.

Description

[Detailed Description of the Invention] [Summary] When the extension subscriber is absent and registers the extension number of the destination,
In the variable call forwarding system, in which incoming calls are forwarded to the telephone with the registered extension number, in addition to registering the forwarding destination extension number, an incoming call is also registered to indicate whether forwarding is possible or not depending on the type of call, and the call is forwarded only if it is possible. It is something to do.

[Industrial application field]

TECHNICAL FIELD The present invention relates to a switching system, and particularly to an improvement in a variable call forwarding system.

In a switching system, such as a private branch exchange system, when an extension subscriber leaves his/her seat, he or she registers the extension telephone number of the destination (transfer destination extension number), so-called absence registration, and the call is received at the extension number of the user's seat. There is a variable call forwarding service that allows calls to arrive at a telephone with a forwarded extension number.

The variable call forwarding system that provides this service allows you to freely select the forwarding destination, but no matter where the call comes from, the call will be received on the phone with the registered forwarding destination extension number, so it depends on the type of incoming call. Consideration must be given to providing a call type variable call forwarding system that does not perform call forwarding.

[Conventional technology]

Figure 6 is a block diagram of a conventional variable absentee forwarding system;
FIG. 8 is an explanatory diagram of the registration processing procedure for the absent transfer unit, and FIG. 8 is an explanatory diagram of the connection processing procedure of variable absent transfer.

In FIG. 6, the main storage device 3 includes a call forwarding section 31 that records a forwarding destination extension number, and the central control device 2 includes a forwarding destination extension registration section 21 that registers a forwarding destination extension number in the missed forwarding section 31. There is a missed transfer unit 22 that performs a variable missed transfer connection. In addition, network 1 includes subscriber circuits 5A, 5B, 5C corresponding to telephones 4A, 4B, 4G, and external line telephone 4.
A central office line trunk 5D connected from D is accommodated.

Registration of a forwarding destination extension number will be explained with reference to FIGS. 6 and 7.

When the subscriber of telephone 4B (extension number 222) requests variable call forwarding and goes off-hook, the central controller 2 detects the off-footer (step S1) and sends out a dial tone from a dial tone trunk (not shown) (step S2). ).

Subsequently, when the special number dialed by the subscriber, for example 13, and the forwarding destination extension number, for example 333, are received, the forwarding destination extension registration section 21 is activated (step S3).

The forwarding destination extension registration unit 21 activates the main storage device 3 to read out the missed call forwarding unit 31 (step S4), and registers the received extension number in the forwarding destination extension number field corresponding to the own extension number field (step S4). S5), the subscriber circuit 5B is connected to a sound source trunk (not shown) and a registration completion sound is sent out (step S6).

When the central control device 2 detects that the subscriber is on-hook, it restores the connection (step S7).

The variable call forwarding connection will be explained with reference to FIGS. 6 and 8.

Now, there is a call from the telephone 4A (extension number 111), and when the central control unit 2 receives the dialed number 222, the call transfer section 22 is activated (step 511).

The missed transfer unit 22 starts the main storage device 3 and transfers the missed transfer unit 3 to the main storage device 3.
1 is read out (step 512), it is determined whether the forwarding destination extension number is registered or not, and the registered extension number 333 is read out (step 512).
Step 513).

Thereafter, the calling telephone 4A and the telephone 4C having the extension number 333 are connected via the network 1 using a normal connection method (step 514). If there is no registration in the call forwarding section 31, the call is connected to the telephone 4B of the dialed extension number (step 515).

When a call is received from the outside line telephone 4D to the central office line trunk 5D via the external exchange, the call forwarding unit 22
is activated, and the call is transferred to the extension telephone registered in the call transfer section 31.

[Problem that the invention seeks to solve]

In the conventional variable call forwarding system, all incoming calls are
Because the call is received on the phone with the registered forwarding destination extension number,
For example, in the case of an incoming call from an outside line, there is a problem in that even if you want the call to arrive directly at the telephone with the dialed extension number, the call will be forwarded to the telephone with the registered forwarding destination extension number.

[Means for solving problems]

FIG. 1 is a block diagram of the principle of the present invention.

In the figure, 4A, 4B, and 4G are extension telephones, and 5D is a central office trunk, which are accommodated in network 1.
They are interconnected under the control of the central controller 2 using instructions and data stored in the main memory 3.

As related to the present invention, call type variable missed call forwarding permission/denial table 32 in which transfer permission/denial is registered for forwarding destination extension number and call type.
The central controller 2 is provided with a call type variable missed transfer means 23 for registering the call type in the call type variable missed call transfer permission table 32 in the main storage device 3 and for determining whether or not to transfer the incoming call to the forwarding destination extension number. This solves the above problems.

[Effect]

When an extension subscriber leaves his/her seat, use telephones 4A and 4B at his or her desk.

Dial the special number from 4C, and the call type variable missed call transfer means 23 of the central control unit 2 records the call type variable call transfer availability table 32 in the main storage device 3 as the forwarding destination extension number and transfers the incoming call to the forwarding destination extension number. Register whether or not it is possible.

When the central control unit 2 is activated by an incoming call, the variable call type variable call transfer means 23 is operated to read the call type variable call transfer permission/disapproval table 32, and check whether the incoming extension number is registered as the transfer destination extension number. If the call type is registered, it is further determined whether the type of call is permitted to be forwarded, and if it is permitted, connection processing to the forwarding destination extension number is performed.

If transfer is not permitted, connection processing to the dialed extension number is performed.

〔Example〕

The present invention will be specifically explained below with reference to illustrated examples.

FIG. 2 is a block diagram of the call type variable call forwarding system according to an embodiment of the present invention, FIG. 3 is an explanatory diagram of the registration processing procedure in the call type variable call forwarding availability table, and FIG. 4 is a call type variable call forwarding system. 1 and 5 are explanatory diagrams 2 and 2 of the connection processing procedure for variable call type call forwarding. The same reference numerals refer to the same objects throughout the design.

In FIG. 2, a transfer destination extension call type registration section 24 and a call type variable absent transfer section 25 correspond to the call type variable absent transfer means 23 of FIG.

Registration of forwarding destination extension numbers and call type transfer permission will be explained with reference to FIGS. 2 and 3.

Now, a subscriber of telephone 4B with extension number 222 forwards an incoming call from another extension to telephone 4C with extension number 333,
Assume that the user wishes to receive calls from outside lines directly to his own telephone 4B.

When the subscriber of telephone 4B goes off-hook, the central controller 2 detects this (step 521) and causes a dial tone to be sent from a dial tone trunk (not shown) (step 5).
22).

The central control unit 2 receives a special number, for example 13, and transmits the transfer destination extension number 333, the central office line transfer number "0" (the central office line transferable number is "1"), and the extension number "1" (the extension number is "1"). 0), the transfer destination extension call type registration unit 24 is activated (step 523).

The forwarding destination extension call type registration unit 24 activates the main storage device 3 and reads out the call type variable missed forwarding availability table 32.Step 52
4), corresponding to own extension number 222, enter the number 333 in the forwarding destination extension number field, "0" (indicating no) in the forwarding possibility station line field, and "1" (indicating yes) in the forwarding possibility extension field. (instruct)
After registering (step 525), the subscriber circuit 4B is connected to a sound source trunk (not shown) and a registration completion tone is sent out (step 526).

When the central controller 2 detects the on-footer of the telephone 4B, it restores the above connection (step 527).

A variable call forwarding connection from another extension will be explained with reference to FIGS. 2 and 4.

When the dial numeral 222 is dialed from the telephone 4A with the extension number 111 in FIG. 2 and the central control unit 2 receives the dial numeral, the call type variable absentee transfer section 25 is activated (step 531).

The call type variable missed transfer unit 25 starts the main storage device 3 and reads out the call type variable missed transfer availability table 32.Step 53
2) Determine whether the forwarding destination extension number is registered or not. Step 533) If it is registered, check the contents of the forwarding permission/disapproval extension field and check "
1'', the transfer destination extension number 333 is read out and handed over to the next connection process (step 534).

Thereafter, the telephone 4A and the telephone 4C are connected via the network 1 using a normal connection method (step 535).

There is no forwarding destination extension registered, or the forwarding possibility extension field is “0”.
”, the dialed extension number is connected to the telephone (step 536).

The case of incoming calls from the central office line trunk 5D will be explained with reference to FIGS. 2 and 5.

When the central controller 2 receives the dialed digits 222 from the office line trunk 5D, the call type variable absent transfer section 25 is activated (step 541).

The call type variable missed transfer unit 25 activates the main storage device 3 in the same manner as described above to read the call type variable missed transfer permission table 32 (step 542), and determines whether the forwarding destination extension number is registered or not (step 543). , if there is a registration, I check the contents of the forwarding permission/denial line column, but since it is an AI OS, the forwarding destination extension number is 3.
33 and passes the received extension number 222 to the next connection process (step 544).

From then on, use the normal connection method to connect office line trunk 5D and telephone 4B.
is connected via network 1 (step 54
6).

If the transfer destination extension number is not registered in the call type variable missed transfer availability table 32, the office line trunk 5D and telephone 4B are connected via the network 1 as described above (step 346). In addition, if the forwarding permission field is registered as "1", the incoming call from the central office line trunk 5D is not sent to the telephone 4B, but to the telephone 4B, as in the case of incoming calls from the above-mentioned extensions.
It is transferred to C (step 545).

〔Effect of the invention〕

As explained in detail above, in the present invention, by registering whether or not transfer is possible for each call type, transfer is performed according to the call type according to the subscriber's designation.

[Brief explanation of the drawing]

Figure 1 is a block diagram of the principle of the present invention. Figure 2 is a block diagram of a call type variable call forwarding system according to an embodiment of the present invention. Figure 3 is an explanation of the registration processing procedure in the call type variable call forwarding availability table. Figure 4 is an explanatory diagram 1 of the connection processing procedure for variable call type call forwarding.
, Figure 5 is an explanatory diagram 2 of the connection processing procedure for call type variable call forwarding.
, FIG. 6 is a block diagram of a conventional variable absent forwarding system, FIG. 7 is an explanatory diagram of a registration process procedure in a absent forwarding table, and FIG. 8 is an explanatory diagram of a connection process procedure of variable absent forwarding. In the diagram, 1 is the network and 2 is the center side? 23 is a variable call type call transfer means, 3 is a main memory, 32 is a call type variable call transfer availability table, 4A, 4B, and 4C are telephones, and 5D is a central office line trunk. 1 Network Principle block diagram of the present invention (Figure 1) Network (Figure 3) (Figure q) Figure 4

Claims (1)

[Claims] Telephones (4A, 4B, 4C), office line trunks (5D), etc. are accommodated in a network (1), and a central control unit ( In the switching system in which interconnection is performed under the control of 2), the main storage device (3) includes a call type variable missed call transfer permission table (32) that registers whether or not transfer is possible based on the transfer destination extension number and call type.
and a call type variable call forwarding means (in the central control unit (2)) for registering in the call type variable call forwarding permission table (32) and determining whether or not to transfer an incoming call to a forwarding destination extension number.
23) A variable call type call forwarding system characterized by providing the following.