KR20020081711A - Analog subscriber matching apparatus for providing a calling identity delivery service - Google Patents

Abstract

PURPOSE: A matching device for an analog subscriber for providing a CID(Calling Identity Delivery) service is provided to offer the CID service to the analog subscriber who uses an analog telephone for a CID. CONSTITUTION: A frame forming unit(103) receives a digital line signal from a digital subscriber board of a private exchange and extracts a caller ID. An FSK(Frequency Shift Keying) signal generating and transmitting unit(109) receives the extracted caller ID, generates an FSK signal corresponding to the received caller ID, and transmits the FSK signal according to a predetermined data transmission rule. The digital line signal including the caller ID transmitted from the digital subscriber board is coded by a BPRZ-AMI(Bipolar Return-To-Zero-Alternate Mark Inversion) type and is transmitted at a predetermined transmission speed.

Description

ANALOG SUBSCRIBER MATCHING APPARATUS FOR PROVIDING A CALLING IDENTITY DELIVERY SERVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber matching device of a private exchange, and more particularly to an analog subscriber matching device for providing caller information to a subscriber using an analog telephone for caller identity delivery (CID).

In general, private exchanges can provide subscribers with a variety of private exchange services, including basic functions that allow telephone subscribers in certain areas, such as companies and schools, to communicate only through private exchanges, rather than through the telephone office. In particular, recently, private exchanges, which have a digital subscriber board and can provide a variety of private exchange services to digital subscribers, have been widely used.

Conventional private exchanges provide digital extension telephone subscribers with a CID service that displays the caller's telephone number, name and time, etc. on the called party's phone. That is, the private exchange receives caller information, including the telephone number, name, and time of the caller who is its own subscriber, public telephone network subscriber, or subscriber of another private switching network, from its own subscriber, public telephone network or other private switching network, and receives the called party. Is a digital subscriber connected to the digital subscriber board of the private exchange, the private exchange transmits this caller information to the destination digital subscriber via the data channel to display the caller information on the liquid crystal display screen of the digital telephone of the destination digital subscriber. .

On the other hand, analog telephones are used because they are cheaper than digital telephones. However, conventional analog telephones connected to an analog subscriber board of a private exchange provide a number of functions provided by a voice call and a private exchange, but no CID service.

Recently, analog telephones for CIDs have been developed and marketed with liquid crystal display screens that can be connected to a local exchange and receive CID services in accordance with the data transmission interface technical standards for public switched telephone network subscriber lines for CIDs.

However, the conventional private exchange does not have a separate subscriber board that can provide caller information display service to the CID analog telephone, so that the CID service cannot be provided even when the CID analog telephone is connected to the private exchange. there was.

Accordingly, an object of the present invention is to provide a CID analog subscriber matching device capable of providing CID service to an analog subscriber using an analog telephone for CID.

According to an aspect of the present invention to achieve the above object, means for receiving a digital line signal including the caller information from the digital subscriber board of the exchange to extract the caller information, and receives the caller information from the digital subscriber board received Calling Identity Delivery (CID) matching, comprising means for generating an FSK signal corresponding to caller information and means for transmitting the analog voice signal and the FSK signal according to a predetermined data transfer rule Provide the device.

1 is an overall system diagram showing an example of connection between a private telephone having a CID analog subscriber matching device and a subscriber telephone and an external switching network according to the present invention.

FIG. 2 is a block diagram showing an embodiment of a CID analog subscriber matching device according to the present invention shown in FIG.

<Explanation of symbols for the main parts of the drawings>

10: private exchange

50: analog phone for CID

100: CID analog subscriber matching device

107: CID processor unit

109: FSK signal generation and transmission unit

111: ring signal detection unit

113: loop signal detection unit

Hereinafter, an analog subscriber matching device and a private exchange using the same for providing a Calling Identity Delivery (CID) service according to an embodiment of the present invention will be described with reference to the accompanying drawings.

First, FIG. 1 is a diagram showing a connection example of a private exchange and a subscriber telephone, another private exchange, and a local exchange according to the present invention. As shown, the private exchange 10 according to the present invention is provided to an analog telephone subscriber. It is configured to provide a CID service, is connected to the local exchange 20 through a Public Switched Telephone Network (PSTN) (61), and with other private exchanges (30) through a dedicated line (62). It is connected to the general analog phone 40, CID analog phone 50 and the digital phone 60 is connected.

In Fig. 1, the private exchange 10 has an analog subscriber board connected to a regular analog telephone 40 and a two-wire analog subscriber line 63, analog voice calls and transfers, conference calls. Services such as call pickup, speed dialing, and the like to the general analog phone 40. For example, an analog telephone subscriber uses a service by dialing function codes such as # 1 and # 2 in a general analog telephone 40 of a dual-tone multi-frequency (DTMF) scheme.

In addition, the private exchange 10 has a digital subscriber board supporting a connection scheme using a dedicated protocol and signal standard, and is connected to the digital telephone 60 through the digital subscriber line 65, and the digital The digital telephone 60 provides a variety of services other than those provided by the voice call and the analog telephones 40 and 50. Since the digital telephone 60 has a display screen and various function buttons, the digital subscriber can press a function button instead of pressing a function code as in the analog phones 40 and 50 and receive a guide for the corresponding function on the display screen. Various services are more convenient than analog subscribers.

In addition, the private switch 10 includes a CID analog subscriber matching device 100 connected to the analog subscriber board and the digital subscriber board, and is connected to the analog telephone 50 for the CID via a 2-wire analog subscriber line 64. In addition to the service provided to the general analog phone 40, the CID service is further provided to the analog phone 50 for the CID. The CID analog telephone 50 has a display screen and supports a CID data transmission interface to receive and display caller information including the caller's telephone number, name, and time from the private exchange 10.

For example, the private exchange 10 as described above uses a CID analog subscriber matching device 100 for accommodating CID analog subscribers to Meridian 1 or SL-1 of Nortel Netwroks. In addition, it can be implemented, the CID analog subscriber matching device 100 according to the present invention follows the method of providing the caller information display function while using the existing analog subscriber board as it is. In addition, digital line signals including digital telephone control signals and caller information transmitted and received by digital subscribers at Meridian 1 or SL-1 private exchanges are coded using the Bipolar Return-to-Zero-Alternate Mark Inversion (BPRS-AMI) method and TCM. (Time Compression Multiplexing) is transmitted and received at 512 Kbps using the transmission scheme.

According to an embodiment of the present invention, as described above, the subscriber line of the existing analog subscriber board and the subscriber line of the digital subscriber board provided in the private exchange 10 are connected to the CID analog subscriber matching device 100, and the CID. By connecting the analog telephone line 50 for the CID to the analog subscriber line output connection terminal 117 of the analog subscriber matching device 100, the analog telephone line 50 for the CID is connected. Provide CID service.

2 is a block diagram showing an embodiment of a CID analog subscriber matching device 100 according to the present invention.

As shown in FIG. 2, the CID analog subscriber matching device 100 includes a TCM line interface unit 101, a frame forming unit 103, a main processor unit 105, a CID processor unit 107, and an FSK (Frequency). Shift Keying) signal generation and transmission unit 109, ring signal detection unit 111, loop signal detection unit 113, analog subscriber interface unit 110 and analog subscriber line output connection terminal 117.

The TCM line interface unit 101 is connected to a digital subscriber board (not shown) of the private exchange 10 through a digital subscriber line to match the impedance with the digital subscriber board and receive from the digital subscriber board, the BPRZ-AMI. It converts the coding type digital line signal to TTL (Transistor Transistor Logic) level and vice versa.

The frame forming unit 103 is connected to the TCM line interface unit 101 to reproduce the setting and transmission rate of the frame structure of the digital line signal converted to the TTL level, and separates the caller information received from the digital subscriber line to the CID. It transfers to the processor unit 107.

The main processor unit 105 manages the digital line signal processed by the frame forming unit 103, controls the asynchronous transmission rate of the digital line signal, manages the caller information received on the digital subscriber line, Monitor the transmission and reception status.

The CID processor unit 107 is connected to the frame forming unit 103 and collects caller information including the caller's telephone number, name, time, and the like transmitted from the digital subscriber board. In addition, the CID processor 107 is connected to the FSK signal generation and transmission unit 109, the ring signal detection unit 111, the loop signal detection unit 113, which will be described later, to control the FSK signal transmission, the analog telephone ring signal Detect and monitor the status of the analog subscriber line.

The FSK signal generation and transmission unit 109 generates a CSK FSK signal under the control of the CID processor unit 107 and transmits it to the analog subscriber interface unit 115.

The ring signal detecting unit 111 detects a ring signal supplied from an existing analog subscriber board and transmits a monitoring signal to the CID processor unit 107.

The loop signal detection unit 113 monitors the subscriber response state of the CID analog telephone 50 connected to the analog subscriber line output connection terminal 117, and transmits a monitoring signal to the CID processor unit 107.

The analog subscriber interface unit 115 connects in parallel with the analog subscriber line and receives the FSK signal generation and the sender information FSK signal from the transmitter 109, and sends the caller to the CID analog telephone 50 in accordance with a predetermined CID data transmission interface. Transmit the information FSK signal.

The analog telephone line 50 for the CID is connected to the analog subscriber line output connection terminal 117 through two wires.

Although the above describes the CID analog subscriber matching device 100 according to an embodiment of the present invention, this does not limit the scope of the present invention, and the CID analog subscriber matching device 100 may be implemented as all other possible modifications. have.

Hereinafter, a process of providing a CID service to the CID analog phone 50 will be described in detail with reference to FIGS. 1 and 2.

When the TCM line interface unit 101 receives a BPRZ-AMI coding method digital line signal including a caller information including a caller's telephone number, name, and time from the digital subscriber board at a 512Kbps transmission rate, the TTL line is used as a Transistor Transistor Logic. ) Is transferred to the frame forming unit 103.

The frame forming unit 103 separates a control signal from a digital line signal received from the TCM line interface unit 101 and transmits caller information to the CID processor unit 107. As described above, the frame forming unit 103 extracts only the sender information of the digital line signal and transmits it to the CID processor unit 107.

The CID processor 107 receives the monitoring signals from the ring signal detector 111 and the loop signal detector 113, and generates and transmits the FSK signal from the caller information received through the frame generator 103. Convert the data into a form recognizable by the FSK signal generation and transmission unit 109.

The FSK signal generating and transmitting section 109 generates an FSK signal for the caller information data received from the CID processor section 107 and in accordance with the predetermined CID data transmission interface, the analog subscriber interface section 115 and the analog subscriber line output connection terminal. Through 117, the CID is transmitted to the analog telephone 50.

The ring signal detecting unit 111 detects a ring signal generated from the analog subscriber board of the private exchange and provides a monitoring signal for determining a time point when the CID processor unit 107 transmits caller information to the analog subscriber interface unit 115. send.

The loop signal detecting unit 113 monitors the subscriber response state of the CID analog telephone 50 connected to the analog subscriber line output connection terminal 117 and determines whether to continuously transmit caller information to the CID processor unit 107. Sends a watch signal for

In the CID analog telephone 50, after receiving the first ring signal from the analog subscriber line output connection terminal 117, the caller information is received and displayed on the display screen, and the ring signal received until the subscriber answers.

When the subscriber responds, i.e., is in the off-hook state, the analog subscriber interface unit 115 detects the subscriber response signal transmitted from the CID analog phone 50 and notifies the CID processor unit 107. do.

When the call ends, i.e., when it is in the on-hook state, the analog subscriber interface unit 115 detects a recovery signal transmitted from the CID analog telephone 50 and notifies the CID processor unit 107 of the circuit recovery state.

As described above, according to the present invention by extracting the caller information contained in the digital line signal, the voice call is made through an analog subscriber line, by providing a matching device for CID analog subscribers capable of processing FSK signal for CID service CID service is made possible by connecting an analog telephone for CID to a private switch having a digital subscriber line.

Although the invention has been particularly shown and described by the foregoing detailed description, it will be appreciated that various changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims. It is self-evident.

Claims (4)

In Calling Identity Delivery (CID) analog subscriber matching device, Means for receiving a digital line signal from a digital subscriber board of the private exchange and extracting caller information; Means for receiving the extracted caller information and generating an FSK signal corresponding to the received caller information; Means for transmitting the FSK signal in accordance with a predetermined data transmission rule. CID analog subscriber matching device comprising. The method of claim 1, And a digital line signal including the caller information transmitted from the digital subscriber board is coded in a Bipolar Return-To-Zero-Alternate Mark Inversion (BPRZ-AMI) scheme and transmitted at a predetermined transmission rate. The method of claim 1, Means for detecting a ring signal transmitted from an analog subscriber board of the private exchange; Means for monitoring the response status of the analog telephone subscriber for the CID from the analog subscriber line output connection terminal; Means for transmitting the caller information to the FSK signal generating means on an analog subscriber line in accordance with the detected ring signal and the monitoring result by the monitoring means; Analog subscriber matching device for CID further comprising. 4. The matching device of claim 3, wherein all means are implemented in one board.