KR20070027322A - Apparatus and method for a did implementation of key phone system - Google Patents

Abstract

A DID(Direct Inward Dialing) realization device in a keyphone system and a method thereof are provided to connect a relay element of an E&M(Ear and Mouth) circuit to a transformer center coupled with a DID circuit, thereby realizing the keyphone system through DID with reduced hum noise even without adding a new element or separating a hybrid trunk board. A hybrid trunk board(130) consists of a DID circuit, a transformer coupled with the DID circuit, and a relay element for connecting a center of the transformer with a ground(GND). A controller(120) turns on or off the relay element, so that the transformer center of the hybrid trunk board(130) is connected with or separated from the ground(GND). The hybrid trunk board(130) further comprises an E&M circuit and a relay element for connecting the E&M circuit with the ground(GND).

Description

Apparatus and method for implementing DID in keyphone system {APPARATUS AND METHOD FOR A DID IMPLEMENTATION OF KEY PHONE SYSTEM}

1 is a view showing a hybrid trunk board in a keyphone system according to the prior art.

2 is a view showing a hybrid trunk board in the keyphone system according to an embodiment of the present invention.

Figure 3 is a block diagram showing a key phone system according to an embodiment of the present invention.

4 is a flowchart illustrating a DID implementation method of a key phone system according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100: key phone system 110: input unit

120: control unit 130: hybrid trunk circuit

10: DID circuit 20: E & M circuit

The present invention relates to a device and a method for implementing a ID in a key phone system.

Key-Telephone system is a system that allows several people to efficiently use several phone numbers while being interphone with each other for a plurality of phones, and distributes and connects incoming calls.

 The key phone system is mainly composed of the main unit and the telephone, a line connecting the main unit and the telephone, and additional equipment for more efficient operation of the performance of the system. Claims are distinguished by the number of trunk lines (phones with phone numbers coming from the telephone office) and the maximum capacity of the system to accommodate extension subscribers.

In the past, the system with an extension of 40 lines or less was designated as a key phone, and the system beyond that was called an exchange, but since 1988, the limitation of each station's capacity has been removed, making it difficult to clearly distinguish between a key phone and an exchange. In general, the extension of 50 lines or less is called a small-capacity keyphone, the 50-line to 150 lines or less medium-sized keyphones, and the 300-line or less line is a large-capacity keyphone.

In general, a key phone system is widely installed and used in an office environment.

Such a key phone system is in the form of a cabinet (Cabinet) in appearance, and consists of a plurality of (Shelf) internally. The self is composed of at least one of a control board, a switching board, a subscriber board, and a hybrid trunk board.

The hybrid trunk board includes a direct inward dialing (DID) trunk circuit (hereinafter referred to as DID circuit), an E & M (ear and mouth) trunk circuit (hereinafter referred to as E & M circuit), a ring down (R / D) trunk circuit, and the like.

In general, the trunk circuit is a circuit that is connected between an exchanger and a central office line to form a trunk line call loop by seizing the trunk line and interfacing a signal between the trunk line and the switching circuit of the exchange. .

'DID' refers to a function that allows a user to directly call a telephone without going through an operator when he wants to communicate with a telephone connected to a keyphone or an exchange from the outside.

'E & M' refers to data signal processing functions commonly used in trunk lines.

1 is a view showing a hybrid trunk board in a keyphone system according to the prior art.

As shown in FIG. 1, the hybrid trunk board is implemented to include at least the DID circuit 10.

The hybrid trunk board implements DID through the DID circuit 10.

The hybrid trunk board may implement a DID having reduced hum by fixing a center of a transformer connected to the DID circuit 10 to GND in implementing the DID.

Here, the hybrid trunk board uses a shunt pin to fix the center of the transformer connected to the DID circuit 10 to GND.

However, the use of shunt pins for DID implementation in hybrid trunkboards is a hassle for the user to manually move the shunt pins toward GND. In addition, there is a problem in that the operation of the keyphone system to stop the movement of the shunt pin and to remove the hybrid trunk board from the keyphone system.

Accordingly, an object of the present invention is to solve the problems according to the related art, and an object of the present invention is to provide an apparatus for implementing a DID in a keyphone system for implementing a low-humidity DID without separating the hybrid trunk board from the keyphone system; In providing a method.

A device for implementing a DID in a keyphone system according to an aspect of the present invention for achieving the above object, a hybrid trunk board comprising a DID circuit and a transformer connected to the DID circuit, a relay element for connecting the center and the GND of the transformer ; And a control unit for turning on or off the relay element so that the transformer center of the hybrid trunk board is connected to or disconnected from the GND.

The hybrid trunk board further includes an E & M circuit and a relay element connecting the E & M circuit and GND, and the relay element connected to the center of the transformer is the same relay element as the relay element connected to the E & M circuit.

The relay element includes two contacts.

On the other hand, in another aspect of the present invention for achieving the above object, a method of implementing a DID in a key phone system, receiving a DID setting signal from the outside; And receiving the DID setting signal, controlling a relay element for connecting a transformer connected to the DID circuit to GND to connect the transformer and GND.

As described above, the apparatus and method for implementing a DID in the keyphone system according to the present invention described below, when the transformer center connected to the DID circuit of the hybrid trunk board is fixed to GND using a relay element, Noise can be reduced.

In addition, the present invention can use a relay device connected to the conventional E & M circuit as an embodiment in the use of the relay device. The relay element connected to the E & M circuit is a relay element with two contacts. Only one of these two contacts is used in the E & M circuit, and the other is not used.

In the present invention, the other one contact which is not used may be used as a relay element for connecting the transformer connected to the DID circuit to the GND.

Thus, by using the relay element of the conventional E & M circuit, the key phone system according to the present invention does not need to add a new relay element.

DID implementation apparatus and method in a key phone system according to the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, the present invention will be described with reference to an embodiment using a relay element of the E & M circuit.

2 is a view showing a hybrid trunk board in a key phone system according to an embodiment of the present invention.

As shown in FIG. 2, the hybrid trunk board may be implemented to include a DID circuit 10 and an E & M circuit 20.

The voice signal input from the DID trunk line in the DID circuit 10 may be moved from the tip and the ring to the transformer input terminal by the constant current characteristic of the DID circuit 10. In addition, the signal moved to the input terminal of the transformer may be transmitted to an AC-DC converter (not shown) through the transformer. The AC-DC converter may convert a voice signal input from the trunk line into a digital signal.

On the other hand, the E & M circuit of the conventional hybrid trunk board includes a relay consisting of two contacts. However, the E & M circuit of the conventional hybrid trunk board only uses one contact of the two contacts of the relay to the M line, but does not use the other contact.

In FIG. 2, a relay used in a conventional hybrid trunk board is assumed to be RL1, for example, and RL1A and RL1B of RL1 may be connected as shown.

That is, the hybrid trunk board may connect the RL1A of the relay RL1 to the M line of the E & M circuit 20 and the RL1B to be connected to the center of the transformer connected to the DID circuit 10.

The hybrid trunk board to which RL1 is connected in this way may enable two contacts of RL1 to be turned on / off at the same time.

In a hybrid trunk board, when two contacts of RL1, that is, RL1A and RL1B are turned on at the same time, the center of the transformer connected to the DID circuit 10 may be fixed to GND, and the M line of the E & M circuit 20 may be fixed in a hook-off state. .

Therefore, in the hybrid trunk board, when two contacts of the RL1 are turned on at the same time, the center of the transformer is fixed to the GND, so that the hum noise can be reduced and the DID can be realized.

On the other hand, when the two contacts of the RL1 in the hybrid trunk board is off at the same time, the center of the transformer connected to the DID circuit 10 is separated from the GND, M line of the E & M circuit 20 can be fixed in the hook-on state.

Therefore, when the two trunk contacts of the RL1 is off at the same time, the hybrid trunk board can implement E & M with M-line of the E & M circuit 20 hooked on.

In this way, the keyphone system connects the RL1B of the relay RL1 of the E & M circuit 20, which is not used in the past, between the transformer center connected to the DID circuit 10 and the GND to control two contacts of the RL1 at the same time, thereby making the hybrid trunk board a keyphone system. It is possible to implement DID with reduced hum noise without separating from

3 is a block diagram showing a key phone system according to an embodiment of the present invention.

As illustrated in FIG. 3, the key phone system 100 may be configured to include an input unit 110, a controller 120, and a hybrid trunk board 130.

The input unit 110 may receive a DID, an E & M setting signal, and other control signals from the management device. Here, the management device is a device that interlocks with the key phone system 100 and transmits a setting and control signal for any function of the key phone system to the key phone system.

The control unit 120 performs overall control of the key phone system 100, and may implement and operate a hybrid trunk board according to the detected signal by identifying a signal received from the management device.

The hybrid trunk board 130 may turn on or off the contact point of the RL1 according to a signal input from the controller 120.

Looking at the DID implementation operation of the key phone system having such a configuration in detail, first, the input unit 110 may receive a DID setting signal from the management device.

When the input unit 110 receives the DID setting signal from the management device, the input unit 110 may output the received DID setting signal to the control unit 120.

When the controller 120 receives the DID setting signal from the input unit 110, the controller 120 may analyze the input signal and confirm that the DID setting signal is the DID setting signal. When the controller 120 confirms that the input signal is the DID setting signal, the controller 120 may output the relay RL1 on signal to the hybrid trunk board 130.

The RL1 of the hybrid trunk board 130 may receive a signal from the controller 120 and turn on two contacts according to the input signal. Here, by turning on RL1, the center of the transformer connected to the DID circuit 10 may be fixed to GND, and the M line of the E & M may be hooked off.

Accordingly, the hybrid trunk board 130 may implement a DID having reduced hum noise by turning on two contacts RL1A and RL1B of the RL1. In addition, the controller 120 may operate the hybrid trunk board 130 as a DID.

4 is a flowchart illustrating a DID implementation method of a key phone system according to an embodiment of the present invention.

As illustrated in FIG. 4, the key phone system 100 may receive a DID or E & M setting signal and other control signals from the management apparatus (S11).

When receiving the DID or E & M setting signal and other control signals from the management device, the key phone system 100 may analyze the received signal to analyze whether the received signal is the DID setting signal (S12).

If the signal received from the management apparatus is a DID setting signal, the key phone system 100 may simultaneously turn on two contacts of the RL1 of the hybrid trunk board 130 (S13).

When the two contacts of the RL1 are turned on at the same time, the keyphone system 100 implements a DID having a reduced hum noise by the center of the transformer connected to the DID circuit 10 is fixed to the GND and the M line of the E & M circuit 20 is hooked off. And can be operated (S14).

Meanwhile, the key phone system 100 may analyze whether the signal received from the management device is the E & M setting signal if it is not the DID setting signal (S15).

If the received signal is an E & M setting signal, the key phone system 100 may simultaneously turn off both contacts of the RL1 of the hybrid trunk board 130 (S16).

When two contacts of RL1 are turned off at the same time, the keyphone system 100 can implement and operate an E & M in which the center of the transformer connected to the DID circuit 10 is separated from the GND, and the M line of the E & M circuit 20 is hooked on. There is (S17).

Meanwhile, if the signal received from the management apparatus is not a DID or E & M setting signal, the key phone system 100 may process the corresponding signal according to the command of the corresponding signal (S18).

As such, the key phone system 100 may receive and implement a DID or E & M setting signal from the management device and control two contacts of the RL1 according to the received signal, thereby implementing and operating the DID or the E & M.

The apparatus and method for implementing a DID in a keyphone system according to the present invention as described above, by connecting a relay element of an E & M circuit not used in the prior art to a transformer center connected to the DID circuit, to separate the hybrid trunk board in the keyphone system or to a new element Keyphone systems can be implemented and operated with hum-noise-reduced DIDs without the need for additional hardware.

Claims (4)

A device for implementing a DID in a key phone system, A hybrid trunk board including a DID circuit, a transformer connected to the DID circuit, and a relay element for connecting a center of the transformer and a GND; Wow And a controller for turning on or off the relay element to allow the transformer center of the hybrid trunk board to be connected to or disconnected from the GND. The method of claim 1, The hybrid trunk board, And an E & M circuit and a relay element connecting the E & M circuit and GND. And a relay element connected to the center of the transformer is the same relay element as the relay element connected to the E & M circuit. The method of claim 2, The relay element, A device implementing DID in a key phone system including two contacts. In the method of implementing a DID in a key phone system, Receiving a DID setting signal from an external source; Wow And receiving the DID setting signal to control a relay element for connecting a transformer connected to a DID circuit to a GND to connect the transformer and a GND.

Images