JPS63102533A - Absence transfer system for telephone set - Google Patents

Abstract

PURPOSE:To improve the service function by enabling a transfer destination extension telephone number to a subscriber extension and a transfer destination external telephone number to the telephone set to be set to a storage circuit in a private branch of exchange so as to set an external line number not limiting the transfer destination to the extension. CONSTITUTION:An extension number (c) and a transfer destination number (d) are stored in pairs at each extension. Moreover, a designation flag applying absence transfer is represented by setting '1' in a column (b). A column (a) represents a physical address of each extension and the addresses of all the extensions are constituted in a storage circuit 3 as a table. When an incoming extension is subject to absence registration, the table of the transfer destination number is checked and when a column (d) is an external number starting from '0', a trunk line call is applied. When the column (d) is an extension number starting from a number other than '0', a call signal is sent to the extension telephone set.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a missed call forwarding system used in automatic exchanges in the field of industrial application.

(One of the service functions of conventional technology automatic switchboards is called call forwarding service. , register the 6-hour number of your destination on your yen line, and when you receive a call,
There are many people who have the money to trust this registered friend destination AJK layer and avoid having to perform extra transmissions that require manual intervention on the way. Among the 11 conventional technologies, for example, Japanese Patent Application Laid-open No. 115659/1983 (i(04M 3/
46) "Response-free transfer method", JP-A-59-105750
No. (Ho4M 5154) "Variable absentee forwarding registration display system", JP-A-59-16457 (HD4M5154)
There is a ``call forwarding system'', and these conventional techniques add yet another advantage to this call forwarding service.

(c) Problems that the invention solves and improves In these calls, even if the forwarding destination is open, it is the same PBX (PBX) p'3 (2) other extension, and for example, if you are walking outside the company. If the call is transferred to someone's missed call or transferred to the home after leaving the office, the VC service will not be available t0 Therefore, in the present invention, the transfer destination is the same p B P other than X yen
It is not limited to 3, but it is also possible to set an external number, and call forwarding is possible.
- Improved service functions? The purpose is to achieve this goal.

(b) Means for Solving the Problems In order to solve the above-mentioned problems, the present invention employs a private branch exchange having a configuration as shown in FIG. That is, the call path switch f(L) also includes the interface circuit of the built-in telephone (4), and is connected to another common-line telephone (4g) using the built-in telephone (4).Furthermore, communication to and from the central office line is via the central telephone trunk. This is done through the circuits.Furthermore, the communication path switch (1) I-! CP
Connection, change, disconnection, etc. of each communication path are performed under the control of U (2). In addition, the memory circuit (MEM) (31n CPU
In addition to the program and working area of 127, all communication paths Om production status f/? ! The setting constants for the four functions are stored in n. Setting μ-2 of call forwarding according to the present invention
As shown in the figure, a medication number (C) and a transfer destination number (d) are stored as a set for each day line. Furthermore, the designation flag for performing missed call forwarding is indicated by setting ``1#'' in the column. Column (a) indicates the physical address of each extension, and if the entire circle line segment is lost in the table and M E M (3).

(E) Function: When a call is received and the next extension is registered as absent, the table of forwarding destination telephone numbers is checked, and if the field (d) is an outer number with 10'' at the beginning, a call is made.

If the line number (d) is other than 10# and is the leading 173 line number, a call number 14 is sent to that private telephone.

(f) Example Next, the present invention will be explained in detail with reference to the drawings. The first factor is a block diagram showing the configuration of the present invention. Call path switch (1 line to common telephone (4) and central office line trunk (5)
The communication path that is passed to the intermediary through the CPU (2j
The program is controlled by the memory circuit (MEM)
t3). MEM (31 contains tables for setting various service functions, and the table related to call forwarding is extracted from it and shown in Figure 2. In Figure 2, column (a) is This is a number that indicates the physical address of each circular line. (b) @ is a flag that indicates whether call forwarding is set for that extension. For example, if 11' is set, call forwarding is set. t-bis will be executed. (C)- is the y3 store number, which can be assigned to any P3 kashugo for each Yauchitake. (The middle column is the forwarding destination phone number, and this data is 11# in column (b)
Valid only if is set. (One is P
It is a good idea to set not only the 3-line number but also the station line number. If the first number in column (d) is O, it represents the station line destination number 7, and the station line trunk (5)? The outside lines are wired through the line. If the first number is other than O, then Vci'c,
P3J3n? This is the forwarding destination extension number.

For a long time, the function of the CPU (2) was to send a ringing signal to the telephone of the corresponding extension number when transferring the incoming call to the Ffi line. When making a call to an outside telephone number, the transfer sound is transferred by using the normal central office line calling sequence, such as detecting an idle central office line, sending a selection signal, and detecting a response.

If an empty central office trunk cannot be found or if the other subscriber is busy, Vcrj returns a busy tone to the caller. If the calls are made from the same person, the charge will be made to that extension subscriber, but if the call is from a dedicated line or from another development bank, there will be no charge. Therefore, when a call is made from these, the VC will send back a beep.

Next, when transferring money using a dedicated line, the IC is - for example 8 -
15-2351, which is the forwarding destination number (in the memory circuit)
d) Write in column 7. Perform the transfer in the same way as in the case of a central office line.

[G] According to Mr. 7'C in the detailed explanation of the invention, the transfer can be performed not only on circular lines but also on local lines and private lines, and the practical effects are extremely large. Friend, you can also actively use this transfer and use the so-called transfer as a story.

[Brief explanation of the drawing]

Figure 1 is a circuit block diagram of the private branch exchange of the present invention, and Figure 2 is a table of data related to missed transfers in the memory of the 4-in-1 or 7-in-1 memory. (1)...Call path switch-in, f-, (2)...CPU
, f3)...Memory circuit, (4)...Circle line'shi story,
(5)... Central office trunk.

Claims (1)

[Claims] (1) A call path switch to which a plurality of extension telephones are connected, a central office line trunk connected to the call path switch, a CPU circuit that controls the operation of the call path switch, and a CPU circuit that controls the operation of the call path switch;
A storage program control type private branch exchange equipped with a storage circuit connected to a PU circuit and storing a CPU operation program, which includes a transfer destination extension telephone number for a subscribed extension for call transfer, and a transfer destination extension telephone number that is also absent from the transfer destination extension telephone. A telephone call transfer method in which a transfer destination external telephone number for call transfer can be set in the memory circuit.