KR200269148Y1 - Private branch exchange - Google Patents

Abstract

The present invention is a private exchange for switching at least one or more trunk lines and at least one or more stations in response to a call signal, an external circuit unit connected to at least one or more trunk lines to connect a signal, and at least one or more stations An internal circuit unit for connecting a signal, a switching unit connected to the external circuit unit and an internal circuit unit for switching the connection between the trunk line and the internal station, and storing voice messages received through the external circuit unit in each subscriber voice mailbox of the stations. A caller information decoding unit connected to a voice mail unit, an external circuit unit to decode caller information, and encoding information that recognizes a storage state of a voice message received by the voice mail unit into a signal format of caller information for each extension subscriber. A caller information encoding unit for generating an acknowledgment signal, respectively, A voice signal received through the external circuit circuit unit, generating a recognition signal through the caller information encoding unit and recognizing the received storage state of the voice message to a corresponding subscriber. Sender information display via the control unit for controlling the transmission to the analog subscriber terminal to display that the voice message has been received in the caller information display window of the analog subscriber terminal. Therefore, the terminal can visually know the reception state of the voice message without lifting the handset.

Description

Private Switching Equipment {PRIVATE BRANCH EXCHANGE}

The present invention relates to a private switching device, and more particularly, to a device for visually displaying a reception waiting state of a voice mail corresponding to caller information display terminals connected to a private exchange network through a caller information display window.

Typically, a small capacity private exchange device adopts a voice mail system (VMS), records a voice message for a subscriber desired by the user, and then records the subscriber when he / she wants to listen to the recorded voice message. Refers to a device for reproducing voice messages recorded sequentially according to the order.

Therefore, a message transmitted from the other party is recorded in a specific mailbox of the voice mail device, and then an acknowledgment signal is generated to the corresponding extension terminal to notify that the message is recorded at that time, and the recorded message is reproduced.

However, the digital subscriber station such as a keyphone can recognize the reception state of the voice message, but the analog subscriber station cannot recognize the reception state of the voice message because the digital subscriber station cannot transmit or receive the digital signal.

Therefore, Korean Patent Registration No. 10-238527 discloses "A method for notifying an analog subscriber reception message in a private exchange connected with a voice mail device", and when a message is recorded, the message is recorded at that time. In the hook state, it generates a specific recognition tone and voice message.

However, in the related art, the subscriber may recognize that the voice message has been received by lifting the handset of the terminal and turning it off.

Therefore, it was not possible to know what voice messages were received and stored in the voicemail box without lifting the handset.

Accordingly, an object of the present invention is to solve the problems of the prior art, in accordance with the recent spread of the caller information display terminal, the analog subscriber terminal is equipped with a liquid crystal display window, the receiver standby state of the voice message to the caller information display window The present invention provides a private switching device capable of knowing an on-hook state, that is, a reception state of a voice message without lifting a handset.

1 is a block diagram of a private switching device having a voice message reception standby state recognition function using a sender information format according to the present invention.

2 is a diagram illustrating a caller information format.

Figure 3 is a flow chart for explaining the operation of the private exchange device according to the present invention.

Figure 4 is a flow chart for explaining the operation of the caller information display terminal according to the present invention.

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

100: private exchange device 102: external circuit

104: extension circuit unit 108: caller information decoding unit

110: caller information encoding section 112: voice mail section

114: control unit 200: caller information display terminal

In order to achieve the above object, the apparatus of the present invention is a private switch for switching at least one or more trunk lines and at least one station in response to a call signal, the outer circuit unit being connected to the at least one trunk line to connect a signal. An internal circuit unit connected to the at least one internal station for connecting a signal, a switching unit connected to the external circuit unit and the internal circuit unit to switch the connection between the trunk line and the internal station, and voice received through the external circuit unit; A voice mail unit for storing a message in each subscriber voice mailbox of the stations, a caller information decoding unit connected to the external circuit unit to decode caller information, and a recognition to recognize a storage state of the voice message received in the voice mail unit. Encodes the information into the signal format of the calling party information so that the extension A sender information encoding unit for generating an acknowledgment signal for each particle, and storing the voice message received through the external circuit unit in the voice mail unit, and recognizing the received storage state of the voice message to the corresponding subscriber. A control unit for generating a recognition signal through an information encoding unit and transmitting the generated recognition signal to the caller information display analog subscriber station through the internal circuit unit so as to indicate that a voice message has been received on the caller information display window of the analog subscriber station. Characterized in that.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 shows a block configuration of a private exchange device according to the present invention. The private exchange device in Fig. 1 is a small-capacity exchange device for four-by-16 stations. In FIG. 1, the private exchange device 100 is connected to four trunk lines 1 to n through the external circuit unit 102. The information transfer protocol exchanged between the local exchange and the private exchange is based on the R2-MFC (MULTI FREQUENCY CODE) protocol or the common channel signaling (CCS) protocol, which is mainly used in the Channel Associated Signaling (CAS). CCITT NO. 7 Follow the rules. In addition, the private switching device 100 is connected to the 16 stations (1 ~ N) through the extension circuit unit 104, the caller information display subscriber terminal or telephone 200 is connected to each extension end.

A switching unit 106 is connected between the external circuit unit 102 and the internal circuit unit 104 to switch the stations and the external lines according to a call connection request. The external circuit unit 102 is connected to a caller information decoder 108 to decode caller information provided through the trunk lines 1 to n. The caller information encoder 110 is connected to the internal circuit unit 104 to decode the encoded caller information through the stations I to N. The voice mail unit 112 records the voice message of the caller provided through the external line, stores the voice message of the caller in a voice mailbox assigned to each subscriber in a nonvolatile memory such as a flash memory, and plays the voice message recorded at the request of the receiver. .

The control unit 114 includes a microcomputer, a system ROM, a system RAM, and the like, controls the switching unit 106 according to a call connection request, provides the received voice message to the voice mail unit 112, and decodes caller information. And control encoding.

Caller-ID (CID) display service is to display information such as caller's phone number, name or time on the display window of the receiver's phone so that the caller can identify who the caller is so that the recipient can receive the call selectively. will be.

The caller information signal has a data transmission type related to the ring signal in the on hook state and a data transmission type independent of the ring signal. There is also a transmission form of caller information even in the off-hook state.

The data transmission type related to the ring signal is a method of transmitting caller information by carrying a silent section between the first ring signal and the second ring signal.

The caller information transmitted in the on hook state includes a channel occupancy signal 210, a mark signal 220, a message 230, and a checksum word 240.

The channel occupation signal 210 is applied only in the on hook state and not in the off hook state. The channel occupancy signal 210 is composed of a 300-bit block in which "0" and "1" are burned alternately, with the first bit starting with "0" and the last bit ending with "1" irrespective of the ring signal.

The mark signal 220 is composed of 180 ± 25 mark bits regardless of the presence of a ring signal. In the off-hook state, it consists of 80 ± 25 mark bits.

The channel occupancy signal 210 and the mark signal 220 prepare the caller information display terminal to receive the message frame and create an appropriate environment.

Check-sum word 240 allows the sender information display terminal to detect an error for the received data.

Message 230 is modulated in BINARY frequency shift keying (FSK). Logic " 1 " is modulated at 1200 ± 20 Hz, and logic " 0 " is modulated at 2200 +20 Hz.

The message (CDMF: CID DATA MESSAGE FORMAT) is composed of a header portion 232 and a body portion 234, the header portion 232 includes a message type of 1 byte and message length information of 1 byte.

Message type 80H (Hexadecimal) is used to send information related to an incoming call as a call setup message, and includes parameters such as time, calling number, originator's absence, originator's name, absence's reason, and extended reserve.

The main body 234 includes a parameter type, a length, a word, and the like.

The parameter type is 01H for time parameter, 02H for calling party number parameter, 04H for calling party name reason, 07H for calling party name parameter, 08H for calling party name reason parameter, and E0H for extended parameters.

The time parameter consists of a total of 10 bytes of type 1 byte / length 1 byte / month 2 bytes / day 2 bytes / hour 2 bytes / minute 2 bytes. Each byte of month, day, and hour is coded by the ASCII code system.

Caller's name follows KSC5601 code system in Korean and ASCⅡ code system in English.

In the present invention, a signal for informing a voice message reception waiting state between the private exchange apparatus 100 and the caller information display terminal 200 is to use the caller information format.

That is, the voice message reception wait state acknowledgment signal sets the message type of the caller information to 82H as a spare and the parameter type to 01H voice message reception wait state indication data and 02H the number of received voice messages.

In addition, the present invention may be set as follows using the signal format of the VMWI (VISUAL MESSAGE WAIT INDCATION) service using the recognition signal in the digital subscriber station.

Receive standby signal byte Hexadecimal value Explanation One 82 Message waiting indication 2 03 Message length 3 0B Display window control of caller information display terminal 4 01 The number of bytes in the parameter 5 FF Show voice message on display 6 70 Checksum

No incoming voice message signal byte Hexadecimal value Explanation One 82 Message waiting indication 2 03 Message length 3 0B Display window control of caller information display terminal 4 01 The number of bytes in the parameter 5 00 No voice message on display 6 70 Checksum

Referring to FIG. 3, in the private exchange apparatus 100, when a voice message recording request is made (step 402), the corresponding extension number of the voice mail unit 112 is used to transmit the voice message by the normal voice message recording operation through the control unit 114. Save the recording in the voice mailbox of step (404).

Subsequently, the controller 114 checks whether there is a voice message waiting to be received (step 406), and if there is a message waiting to be received, generates the voice message reception wait signal of Table 1 (step 408). If there is no voice message waiting to be received in step 406, the voice message no signal of Table 2 is generated (step 410).

The control unit 114 checks whether the telephone of the extension subscriber to which the voice message is received is in an on-hook state or an off-hook state (step 412).

In the case of the on-hook state in step 412, a reception wait state acknowledgment signal or a message no signal is generated according to the above-described caller information format to provide a recognition signal to the caller information encoding unit 110, and the caller information encoding unit 110 By encoding the recognition signal (step 416) to generate a caller information format recognition signal is transmitted to the caller information display terminal 200 connected to the extension (step 418).

If it is in the off-hook state in step 412, it is checked whether or not the voice message is in a waiting state (step 420). If it is in the waiting state, an existing tone recognition signal is generated (step 422). step).

That is, the caller information format acknowledgment signal is generated in a signal format corresponding to the on hook state or the off hook state.

4, the caller information display terminal 200 checks the reception of the caller information signal (step 430), and if the caller information signal is checked, decodes the caller information signal (step 432).

It is checked whether the message type of the decoded caller information is the reception waiting state acknowledgment signal (step 434).

In step 434, if it is not a reception waiting state acknowledgment signal, it is checked whether there is no received message signal (step 438), and if there is no signal received message, the display window displays no voice message (step 440).

In step 438, if the message is not a message, it is recognized as 80H, which is general caller information, and the corresponding caller information is processed and displayed on the liquid crystal display 202.

When the extension subscriber picks up the handset, presses the voice message listening number " 54 " and presses a 5-digit password (e.g., 20134), the caller information display terminal 200 exchanges the tone signal privately. To the device 100.

The private exchange device 100 receives and interprets the tone signals 54 and 20134, reads the voice message recorded in the personal voice mailbox corresponding to 20134, reproduces it as a voice signal, and connects the terminal 200 to the corresponding extension. To send.

Although the components of the present invention have been described in connection with specific embodiments, the present invention may be implemented in numerous other ways. In conclusion, the particular embodiments depicted in the description are not intended to be interpreted in a limiting sense. Reference to specific parts of this embodiment is not intended to limit the scope of protection of the claims, which describes only the features regarded as essential components of the present invention.

As described above, the present invention can visually display the reception standby state of the voice message by using an analog subscriber terminal having a caller information display window, so that the reception standby state of the voice message can be easily displayed even without the handset being held. As it can be seen, the convenience in use can be improved.

Claims (3)

A private exchange for switching at least one trunk line and at least one station in response to a call signal, An external circuit unit connected to the at least one trunk line to connect a signal; An internal circuit unit connected to the at least one internal station to connect a signal; A switching unit connected to the external circuit unit and the internal circuit unit to switch the connection between the trunk line and the internal line; A voice mail unit for storing a voice message received through the external circuit unit in each subscriber voice mailbox of the stations; A caller information decoding unit connected to the external circuit unit to decode caller information; A caller information encoding unit for generating recognition signals for each extension subscriber by encoding recognition information for recognizing a storage state of a voice message received in the voice mail unit into a signal format of caller information; And The voice mail unit stores the voice message received through the external circuit unit, generates a recognition signal through the caller information encoding unit, and recognizes the generated recognition signal through the caller information encoding unit in order to recognize the reception storage state of the voice message. And a control unit which transmits to the caller information display analog subscriber terminal through the extension circuit unit and controls the caller information display window of the analog subscriber terminal to indicate that a voice message has been received. The private exchange apparatus according to claim 1, wherein the acknowledgment signal is transmitted in a caller information display format in an on hook state of the analog subscriber station without a ring signal. 2. The private exchange apparatus according to claim 1, wherein the reception standby information includes a reception guide message and a number of received voice messages.