JPH04276969A - Call signal transmission system - Google Patents

Abstract

PURPOSE:To identify the caller depending on the difference from call signal patterns even at extension inter-connection by giving a different call signal transmission pattern to each caller extension or plural groups of the extensions and sending the pattern to a called extension after it receives a call. CONSTITUTION:A call signal transmission circuit 5 has plural kinds of call signals A, B,... A dial identification circuit 9 identifies dial information from a called subscriber (e.g. extension telephone set 1) to specify and register a caller subscriber (e.g. extension telephone set 2) and a call signal at the arrival of a call from the extension telephone set 2 among plural kinds of the signals provided in the call signal transmission circuit 5. A storage circuit 7 stores the identified dial information. A central controller 6 retrieves a the storage device 8 on the occurrence of a call connection request to identify whether or not call signal selection is registered and controls the call signal transmission circuit according to the registered information and sends a relevant call signal to the extension telephone set 1. The subscriber of the extension telephone set recognizes it to be a call from the extension telephone set 2 from its call signal.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calling signal sending system in an electronic exchange.

0002

2. Description of the Related Art In conventional calling signal transmission systems, incoming calls from a central office line and incoming calls from an extension line are distinguished by changing the pattern of the calling signal.

0003

[Problems to be Solved by the Invention] In the conventional calling signal sending system described above, it is possible to distinguish only between incoming calls from the central office line and incoming calls from extensions. The disadvantage is that it is not possible to determine whether the call is coming from.

SUMMARY OF THE INVENTION An object of the present invention is to provide a calling signal sending system that classifies calling subscribers by the type of calling signal and changes the calling signal pattern for each classified calling subscriber.

[0005]

[Means for Solving the Problems] The ringing signal sending system of the present invention is a ringing signal sending system in a storage program controlled automatic switching system, which includes a ringing sending circuit equipped with a plurality of types of ringing signals to be sent to the extension of the called side, a dial identification circuit for detecting dialing information from a called subscriber in order to identify and register a paging signal corresponding to an individual calling subscriber or a plurality of groups from among the plurality of types; and a storage device for registering and storing the identified dialing information, and when a call connection request occurs, the storage device is searched and the calling subscriber and called subscriber of the incoming call can select a ringing signal. It identifies whether the subscriber is registered or not, controls the paging signal sending circuit according to the registered information, and sends a corresponding paging signal to the called subscriber.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention. In FIG. 1, it is composed of extension telephones 1 to 3, a call path switch 4, a calling signal sending circuit 5 having a plurality of calling signal sending means, a central control unit 6, a memory circuit device 7, a dial identification circuit 8, and a tone sending circuit 9. do.

Referring to FIG. 1, a registration operation (hereinafter referred to as "call signal selection registration") when a subscriber of extension telephone 1 selects ring signal A as a ring signal transmission pattern in response to an incoming call from extension telephone 2 will be described. explain.

When the extension telephone 1 is taken off-hook, the central controller 6 controls the call path switch 4 to connect the extension telephone 1 and the dial identification circuit 8. Next, the special number for registration, the extension number of extension telephone 2, and an identification code indicating the selection of call signal A are dialed from extension telephone 1.

The central control unit 6 detects this information from the dial identification circuit 8, recognizes that it is the registration mode for selecting a calling signal, and stores the extension number of the extension telephone 1 in the storage circuit 7 as registered. At the same time, correspondingly, the extension number and the calling signal identification code of the extension telephone 2 are simultaneously stored in the storage circuit 7 in order to select the calling signal A when receiving a call from the extension telephone 2.

After the registration is completed, the central control circuit 6 causes the tone sending circuit 9 to send a registration end tone to the extension telephone 1 via the communication path switch 4, thereby terminating the registration operation. Thereafter, by performing similar operations, it becomes possible to register a plurality of calling signals for each calling side extension.

After such a registration operation, when a call is received from extension telephone 2 to extension telephone 1, call signal A is selected and extension telephone 1 is called.
We will explain the operation to send the data. When the extension telephone 2 is taken off-hook, the central controller 6 controls the call path switch 4 to connect the extension telephone 2 and the dial identification circuit 8. Next, the extension number of extension telephone 1 is dialed from extension telephone 2. The central control unit 6 detects this dial information from the dial identification circuit 8, and in order to know whether or not the extension number of the extension telephone 1 is registered for ringing signal selection, the central control unit 6 stores the presence or absence of registration of the extension number of the extension telephone 1 in a storage device. Read from 7 and check if it is registered. When the central control unit 6 confirms that the extension telephone 1 is registered for ring signal selection, the central control unit 6 stores information in order to know whether the extension number of the calling party (extension telephone 2) is registered as a target for ring signal selection. The device 7 is read and it is confirmed that the extension number of the extension telephone 2 is targeted for ring signal selection.

When the central control unit 6 confirms that the extension number of the extension telephone 2 is the target of the ring signal selection, the central control unit 6 reads the ring signal identification code from the storage device 7 and selects the extension number of the extension telephone 2.
It is confirmed that the calling signal sending pattern set for the telephone is the calling signal A, and the calling signal A is selected from the calling signal sending circuit 5 and sent to the extension telephone 1. The subscriber of the extension telephone 1 hears the ringing tone produced by the ringing signal A and knows that the call is received from the extension telephone 2.

[0013] In the above operation, when extension telephone 1 receives a call from extension telephone 3, the extension number of extension telephone 3 is not registered as a target for ringing signal selection, and central control unit 6 When it is learned that the telephone 3 is not registered, a normal calling signal is selected from the calling signal sending circuit 5 and sent to the extension telephone 1.

[0014]

[Effects of the Invention] As explained above, the present invention allows the calling signal transmission pattern to be sent to the called extension to be changed by individual or grouping of calling extensions, thereby making it possible to interconnect the extensions. In this case, the difference in the calling signal transmission pattern has the effect that the calling party can be identified before the called party's telephone goes off-hook.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

[Explanation of symbols]

1-3　　　　　Extension telephone 4　　　　　　Call path switch 5 Calling signal sending circuit 6. Central control device 7. Storage device 8 Dial identification circuit 9 Tone sending circuit

Claims (1)

[Claims] 1. A paging signal sending system in a storage program controlled automatic switching system, comprising: a paging sending circuit comprising a plurality of types of paging signals to be sent to a called extension; A dial identification circuit for detecting dial information from a called subscriber in order to identify and register each calling subscriber or a plurality of groups, and a storage device for registering and storing the identified dial information. When a call connection request occurs, it searches the storage device, identifies whether the calling subscriber and the called subscriber of this incoming call have registered for paging signal selection, and selects the above-mentioned one according to the registered information. A calling signal sending method characterized by controlling a calling signal sending circuit and sending a corresponding calling signal to a called subscriber.