KR100907772B1 - Key phone system - Google Patents

Abstract

Disclosed is a key phone system capable of processing an SMS signal transmitted from a PSTN network and delivering it to an extension. According to an embodiment, in a key phone system, an MPB (Main Process Board) for controlling and switching a system, a SMSB (SMS Board) for analyzing an SMS signal, and a signal received through an external trunk line are CIDs (Caller ID). Caller ID Loop start CO line board (CLCOB) for distinguishing and outputting signals or SMS signals, processing CID signals, Caller Single Line Interface Board (CSLIB) to which SMS phones are connected, and DTIB (to connect digital key phones) Including the Digital Telephone Interface Board (VOIB) and the VOIB (VOIP Interface Board) to which PC phones or IP phones are connected, the MPB detects and receives incoming SMS signals from the external PSTN network through the CLCOB and analyzes the SMS signals from the SMSB. SMS text data is generated and delivered to the phone via CSLIB or DTIB or VOIB. Through this configuration, it is possible to detect the SMS signal incoming to the external CO line in the key phone system and to transmit the digital signal to the digital key phone or SMS phone or PC phone as an extension, and to transmit the SMS text message created by the extension to the external CO line.

Description

Key Phone System {KEYPHONE SYSTEM}

1 is a side view of a conventional keyphone system.

2 is a frame structure of a typical highway.

3 is a block diagram of a key phone system according to an embodiment.

4 is a configuration diagram of the MSB of FIG. 3.

5 is a diagram illustrating an internal configuration of the CLCOB of FIG. 3.

6 is a diagram illustrating an internal configuration of the SMSB of FIG. 3.

7 is an internal configuration diagram of the CSLIB of FIG. 3.

8 is an internal configuration diagram of the DTIB of FIG. 3.

9 is a diagram illustrating an internal configuration of the VOIB of FIG. 3.

10 is a flowchart illustrating a method for receiving an SMS in a key phone system according to an embodiment.

* Explanation of symbols for the main parts of the drawings

1: Key Phone System 2: PSTN

3: SMS Phone 4: Digital Key Phone

5: PC phone 40: MPB

50: CLCOB 60: SMSB

70: CSLIB 80: DTIB

90: VOIB

The present invention relates to a key phone system, and more particularly to a key phone system having a backplane board is provided with a plurality of boards to which the extension telephone is connected.

Referring to FIG. 1, a conventional key phone system 100 includes three key service units (KSUs), a first key service unit 111 as a basic key service unit, and a first key service unit as an extended key service unit. And second and third key service units 112 and 113. The first key service unit 111 supplies a power supply unit (PSU) 140 for supplying power, various peripheral boards (PeriPheral B / D: PP B / B) 150, and the entire system. A main process board (MPB) 120 for controlling and monitoring, and a link module unit (LMU) 130 for interfacing with the second key service unit 112. The second and third key service units 112 and 113 may include a power supply unit (PSU) 140, various peripheral boards (PeriPheral B / D: PP B / B) 150, and a second unit. A link module unit (LMU) 130 for interfacing with the key service unit 112 is included.

The MPB 120 includes a CPU for controlling and operating a system and an eXachange Device (XD) for switching PCM voice data. When the PSU 140 of the first KSU 111 is turned on while the second and third KSUs 112 and 113 are powered on, the CPU of the MPB 120 is provided with some kind of PP B / Ds. The PCM voice time slot is assigned to each PP B / D. Voice time slots are generated at XD of MPB 120 switching PCM voice data. Voice data and control data are transmitted and received through three highways, which are physical passages, each of which has 48 voice time slots. In addition, since three highways are assigned to each of the first KSU 111 and the second KSU 112 of FIG. 1 and two third KSUs 113 are allocated (48x3 + 48x3 + 48x2 = 384), the maximum is 384. Can support ports

The PP B / D 150 is a board that supports interfaces such as trunk lines and stations. As a PP B / D 150, a loop start co line board (LCOB), one of the trunk line processing boards, is connected to a public switching telecommunication network (PSTN) network and a single line interface board (SLIB) station telephone, which is an internal processing board. It provides the call service of the call which enters the trunk line.

However, in the conventional key phone system, only the PCM voice data provided by the XD of the MPB 120 is processed to perform only a call service with the PSTN network but not a short message service (SMS).

An object of the present invention is to provide a key phone system that can display the SMS text received from the external CO line in the key phone system to the digital key phone or SMS phone or PC phone as an extension, and transmit the SMS text message created by the extension to the external CO line. To provide.

According to an embodiment, in a key phone system, an MPB (Main Process Board) for controlling the operation and switching of a system, an SMSB (SMS Board) analyzing an SMS signal, and a signal received through an external trunk line are CID (Caller ID) Caller ID Loop start CO line board (CLCOB) for distinguishing and outputting signals or SMS signals, processing CID signals, Caller Single Line Interface Board (CSLIB) to which SMS phones are connected, and DTIB (to connect digital key phones) Including the Digital Telephone Interface Board (VOIB) and the VOIB (VOIP Interface Board) to which PC phones or IP phones are connected, the MPB detects and receives incoming SMS signals from the external PSTN network through the CLCOB and analyzes the SMS signals from the SMSB. SMS text data is generated and delivered to the phone via CSLIB or DTIB or VOIB.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the following description, when there is a risk of unnecessarily obscuring the gist of the present invention, a detailed description of well-known functions and configurations will be omitted.

3 is a block diagram of a key phone system according to an embodiment. As illustrated in FIG. 3, the key phone system 1 includes a caller id loop start CO line board (CLCOB) 50 for distinguishing whether a signal received after ring detection from an external trunk line is a CID (Caller ID) signal or an SMS signal. And, to control the operation of the system and the voice channel switching function of the MPB 40, and installed in the PP B / D to analyze the SMS signal transmitted from the MPB 40 to generate a PCM signal and deliver it to the MPB 40 Digital Telephone Interface Board (DTIB) 80 to which an SMSB (SMS Board) 60, a CSLIB (Caller Single Line Interface Board) 70 to which an SMS telephone 3 is connected, and a digital key phone 4 are connected. And a VOIB (Voip Interface Board) 90 to which a PC phone or an IP phone is connected.

As shown in FIG. 4, the MPB 40 has an edge connector 21 connected to a PP B / D slot (not shown), a regulator 22 for supplying power to the board, and a LAN. ) The interface unit 23, the CPU 25 for controlling the operation of the system according to the program, the reset 24 for resetting the system and the CPU 25, and the XD for switching the PCM (Pulse Code Modulation) voice data. (eXachange Device) 26, a PLL circuit 27 providing a clock of TDMA PCM voice data, a tone ROM 28 providing various tones, and a program for controlling the system are stored. Programmable Memory Unit (PMU) 29, SRAM 31, Internal I / O 32, Peripheral Device (PP B / D) I / O Unit (PP I / O) 33, a dual asynchronous receiver / transmitter (DUART) 34 for modem control and serial communication, a MODEM (MOdulator and DEModulator) 35, an RS232C port 36, and a board of the MPB 40 PCM voice signal It comprises: (DBID Digital Backplane Interface Device) (37), an audio input channel (Input Voice Channel) (41), an audio channel output portion (Output Voice Channel) (42) provides a digital backplane interface apparatus.

When power is input to the key phone system, the CPU 25 recognizes what kind of PP B / Ds are installed and allocates PCM voice time slots to the respective PP B / Ds. Voice time slots are generated in the XD 26 for switching PCM voice data, and the timing of these time slots is generated based on the clock supplied from the PLL circuit 27. The voice time slot may be represented by the highway structure of FIG. 2.

As shown in Fig. 2, the highway consists of eight sub-frames, and one sub-frame includes one 512 kbps High-level Data Link Control (HDLC) channel, D channel, and six voice channels. It includes. In this case, the HDLC channel is a channel for the MPB 40 to communicate with various PP B / Ds (CLCOB 50, SMSB 60, CSLIB 70, DTIB 80, and VOIB 90). The voice channel of B CH0 to B CH6) is a channel for transmitting and receiving voice data.

The MPB 40 has a switching function for connecting an incoming call to a corresponding station or a plurality of stations connected to the system. That is, when detecting at least one ring signal from the CLCOB 50, voice data is loaded on 48 channels, and the CSLIB 70, DTIB 80, and VOIB 90 to which the telephones of the receiving party number of incoming calls are connected. Command) to receive and process voice data for the channel.

In addition, the MPB 40 according to an embodiment, the MPB 40 transmits the SMS signal transmitted from the CLCOB 50 to the SMSB 60 to be analyzed, and analyzes the SMS text data analyzed from the SMSB 60. In response to the preset switching information, the XD 26 is controlled to transmit SMS text data to the telephone connected to the board through the CSLIB 70, the DTIB 80, or the VOIB 90.

The configuration of the CLCOB 50 interfaces with the edge connector 57 connected to the backplane board (not shown) of the keyphone system and the highway of FIG. 2 from the edge connector 57, as shown in FIG. Digital Backplane Interface Device (DBID) 53, a CODEC 52 for allocating a voice channel required from the DBID 53 and processing a digital voice signal from a CO line as an analog signal, and an external CO line CO I / F unit 51, CPU 54 for ring detection and loop control of the entire board, CID detector 55 for detecting CID signals and SMS signals, and CID storage for storing CID signals Part 56 is included.

The CPU 54 distinguishes whether the signal input after ring detection is an SMS signal or a CID signal and provides the information to the MPB 40. That is, since a signal is generally input between the ring of the incoming call and the ring, the CPU 54 can distinguish whether it is an SMS signal or a CID signal according to the specification of the input signal.

The SMSB 60 has an edge connector 67 connected to the backplane board of the system and a digital backplane interface device (DBID) 63 interfaced with the highway of FIG. 2 from the edge connector 67, as shown in FIG. And an SMS Digital Signal Processor (DSP) 62 which receives the necessary voice channel from the DBID 63 and performs SMS signal analysis (conversion to PCM data), and an SMS storage unit for storing SMS text data as a result of the analysis ( 63) and a CPU 64 that controls the entire board and performs ring detection and loop control. The CPU 64 delivers the SMS text data analyzed by the SMS DSP 62 to the MPB 40.

As shown in FIG. 7, the CSLIB 70 has an edge connector 77 connected to the backplane board PP B / D of the system and a DBID interfaced with the highway of FIG. 2 from the edge connector 77. Digital Back Plane Interface Device (73), CODEC (72) for allocating the necessary voice channel from DBID (73) and processing digital voice signal from SMS phone (3) as an analog signal, SMS phone (3) and Single line telephone (SLT) I / F unit 71 to be connected, CPU 74 which controls the whole board and detects ring control and loop control and hook on / off, and SMS text data from CPU 74 ( And a CID generator 75 for converting SMS digital data into a frequency shift keying (FSK) analog signal. In one embodiment, the CPU 74 transfers the SMS text data transmitted from the MPB 40 to the CID generation unit 75, and transmits the SMS analog signal converted by the CID generation unit 75 to the SLT I / F unit. Forward to the SMS phone 30 via 71.

The configuration of the DTIB 80 is, as shown in FIG. 8, an edge connector 87 connected to the backplane board (PP B / D) of the system, and a DBID interfaced with the highway of FIG. 3 from the edge connector 87. (Digital Back Plane Interface Device) 83 and a Digital Synchronous Subscriber Line Interface (DSASLI) 84 to which a digital key phone 4 is connected. DTIB 80 transmits SMS text data from MPB 40 to digital key phone 4 via DBID 83.

As shown in FIG. 9, the VOIB 90 includes an edge connector 97 connected to the backplane board PP B / D of the system, and a DBID interfaced with the highway of FIG. 2 from the edge connector 97. Digital Back Plane Interface Device) 93, a LAN I / F unit 91 to which an IP phone or PC phone 5 is connected, and a CPU 94 for ring detection and loop control while controlling the entire board. . VOIB 90 transmits SMS text data from MPB 40 to PC phone 5 via DBID 93.

Referring to the SMS transmission and reception method in the key phone system shown in Figures 3 to 10 as follows. Sending / receiving SMS texts by installing a CLCOB board 50, a CSLIB 70, an SMSB 60, and a VOIB 90 in a PP B / D (not shown), which is a universal slot of the key phone system 1, according to an embodiment. To deal with. The CLCOB 50 installed in the PP B / D becomes an external analog trunk line interface and detects a ring from the CO I / F unit 51 and notifies the CPU 54 of the CLCOB 50. The CPU 54 of the CLCOB 50 transmits ring detection and the state on the board to the MPB 40. Specifically, when a ring signal is transmitted to the CLCOB 50 and SMS start information is received between the ring and the ring, the CPU 54 of the CLCOB 50 performs a loop of the CO I / F unit 51. By controlling, the off hook state is transmitted, and the ring detection signal is transmitted to the MPB 40. The MPB 40 receiving the ring detection signal from the CLCOB 50 connects the voice paths of the CLCOB 50 and the SMSB 60 to transfer the SMS signal to the SMSB 60 after ring detection received from the external PSTN network. do. The SMSB 60 analyzes the data of the received SMS signal (converts it into PCM data), stores the resulting SMS text data in the SMS storage unit 65, and transmits the stored SMS text data to the MPB 40. . The MPB 40 transmits the SMS text data received from the SMSB 60 to the digital key phone 4, which is an extension of the key phone system 1, via the DTIB 80, or the CSLIB 70 according to preset switching information. Send to the SMS phone 3 via, or via the VOIB 90 to the PC phone 50.

The digital key phone 4 is a digital key phone, and the DTIB 80 and the digital key phone 4 transmit information in digital signals, not analog. Therefore, the DTIB 80 transmits the received SMS text data as a digital signal to display the SMS text on the display unit (not shown) of the digital key phone 4. At this time, when the SMS text data is transmitted to the digital key phone 4, the SMS text data is immediately transmitted when the digital key phone 4 is in an idle state, that is, an on-hook state. However, when the digital keyphone 4 is in a busy state, that is, in an off hook state, the MPB 40 waits until the digital keyphone is in an idle state and transmits the received SMS text data when it is in an idle state.

In addition, since the VOIB 90 and the PC phone 5 transmit information using a digital signal rather than an analog signal, the VOIB 90 transmits the received SMS text data as a digital signal so as to display a display unit of the PC phone 5 (not shown). ) To display SMS text.

On the other hand, the SMS telephone 3 connected to the SLT I / F 71 of the CSLIB 70 transfers the information as an analog signal rather than a digital signal. That is, the CSLIB 70 converts the received SMS text data into a frequency shift keying (FSK) signal and delivers it to the SMS phone 3. Specifically, the MPB 40 delivers the received SMS text data to the CPU 74 of the CSLIB 70. The CPU 74 sends the received SMS text data to the CID generating section 75, the CID generating section 75 converts the SMS text data into an analog signal, and the CPU 74 controls the SLT I / F section after ring control. Send to the SMS telephone 3 via 71. The SMS telephone 3 displays the SMS text on the display.

As described above, when the MPB 40 detects and receives the incoming SMS signal from the external PSTN network through the CLCOB 50, the SMSB 60 analyzes the SMS signal to generate SMS data to generate the CSLIB 70 or DTIB. Forward to the phone via 80 or VOIB 90. At this time, the CSLIB 70 converts the transmitted SMS data into an FSK analog signal and delivers it to the SMS telephone 3.

10 is a flowchart illustrating a method for receiving an SMS from an external trunk line in a key phone system according to an embodiment. As shown in FIG. 10, when the ring generation is detected in the key phone system (S1), it is checked whether the SMS is received (S2). If the SMS is received, off-hook processing is performed, the MPB 40 is notified of the SMS reception, and the voice path is switched (S3). The MPB 40 requests the SMSB 60 to receive SMS information (S4). When the SMSB 60 completes the SMS reception (S5), the SMSB 60 stores the received SMS information and transmits the received information to the MPB 40, and the MPB 40 sends the CSLIB 70 or the DTIB 80. Or VOIB 80 requests transmission of SMS text data and delivers SMS text data (S6). Check if the digital keyphone 4 (or PC phone 5) is in operation (hook on) (S7) and if not, the MPB 40 will send an SMS text message to the DTIB 80 (or VOIB 90). By transmitting the data, SMS text data is transmitted to the digital key phone 4 (or PC phone 5) (S9). In addition, the SMS telephone 3 checks whether the SMS telephone 3 is in operation (hook on) (S8). If the SMS telephone 3 is not in operation, SMS text data is transmitted to the CSLIB 70 and converted to FSK (Frequency Shift Keying). SMS text is transmitted (S10). On the other hand, if it is determined in step S2 that the reception of the CID rather than the SMS (S11), and stores the CID information in the CID storage unit 56 and delivers to the MPB 40, MPB 40 transmits the CID information to the terminal ( The SMS phone 3 / digital key phone 4 / PC phone 5 is transmitted and displayed (S12).

By such a configuration, it is possible to provide and display SMS information received from an external PSTN network to a digital key phone that is an extension of the key phone system and a phone that supports the SMS service.

The above description is an SMS process received from an external PSTN network, and on the contrary, a method of transmitting an SMS to an external PSTN network from an extension telephone connected to a key phone system is as follows. When sending an SMS text from an internal digital key phone (or SMS phone) connected to a key phone system other than the external PSTN network, the digital key phone (or SMS phone) transmits an SMS signal to the DTIB 80 (or CSLIB 70). When passing to the SMSB 60 through the DSP of the SMSB 60 converts the analog SMS signal information and passes through the MPB 40 to the CLCOB 50, CLCOB (50) is off-hook to the SMS signal to the external PSTN network Send by Similarly, the VOIB 90 receives the SMS signal to be transmitted from the PC phone 5 to the external PSTN and transmits it to the SMSB 60, and the SMSB 60 generates an SMS text signal to the MPB 40 and the CLCOB ( 50) to the PSTN network. Accordingly, it is possible to receive SMS text in the mobile phone.

While the invention and its various functional components have been described in particular embodiments, the invention may be implemented in hardware, software, firmware, middleware, or a combination thereof, and the system, subsystem, components or sub-configurations thereof. It should be understood that they can be used as elements. If implemented in software, the elements of the invention are instructions / code segments for performing the necessary tasks. The program or code segments may be stored in a machine readable medium, such as a processor readable medium, a computer program product, or via a transmission medium or communication link by a computer data signal embodied in a carrier wave or a signal modulated by a carrier. Can be sent. Machine readable media or processor readable media may include any medium that can store or transmit information in a form readable and executable by a machine (eg, processor, computer, etc.).

In addition, while the present invention has been described in connection with some embodiments, it is to be understood that various modifications and changes can be made without departing from the spirit and scope of the invention as will be understood by those skilled in the art. You will need to know Also, such modifications and variations are intended to fall within the scope of the claims appended hereto.

According to the above embodiments, the digital text phone that can be sent to the external phone line in the key phone system can be displayed by transmitting to the digital key phone or SMS phone or PC phone as an extension, and the digital SMS can be sent to the external trunk line Key phone systems are provided. In addition, as the SMS message can be transmitted from the key phone system to the external PSTN network, the mobile phone can be received.

Claims (12)

A keyphone system having a backplane board on which a plurality of boards to which an extension telephone is connected are installed. Connected to an SMS phone, the CSLIB (Caller Single Line Interface Board) converts and provides SMS text data into Frequency Shift Keying (FSK), DTIB (Digital Telephone Interface Board) connected to a digital key phone, An external CO line is connected, and after detecting a ring signal, it distinguishes and outputs whether a signal received through the external CO line is a CID (Caller ID) signal or an SMS signal, and processes the CID signal. )Wow, A main processor board (MPB) for receiving a ring detection signal and board state information from the CLCOB to control a system operation and performing a voice channel switching function; A Short Messaging Service Board (SMSB) for analyzing the SMS signal received through the MPB and delivering the SMS text data to the MPB as a result of the analysis; The MPB transfers the SMS signal to the SMSB by connecting the CLCOB and the voice path of the SMSB upon receiving a ring detection signal from the CLCOB, and transmits the SMS text data from the SMSB to one of the DTIB and the CSLIB. And processing the CID signal separately from the SMS signal. The method of claim 1, The CLCOB includes an edge connector connected to the backplane board, a digital backplane interface device (DBID) interfaced with a highway from the edge connector, and a voice channel allocated from the DBID to receive digital voice from a trunk line. A codec for processing a signal as an analog signal, a CO I / F unit to which an external trunk line is connected, ring sensing and loop control of the CO I / F unit, and the ring detection signal and the CO I / F unit A CPU for transmitting an SMS signal to the MPB, a CID detector for detecting the CID signal and the SMS signal, and a CID number storage for storing the CID, And the CPU controls the loop of the CO I / F unit to leave it in an off hook state when detecting a ring through the CO I / F unit. The method of claim 1, The SMSB is configured to perform an SMS signal analysis by receiving an edge connector connected to the backplane board, a digital backplane interface device (DBID) interfaced with a highway from the edge connector, and a required voice channel from the DBID. An SMS DSP, an SMS storage unit for storing the analyzed SMS text data, and a CPU that controls the entire board and detects and loops the ring, And analyzing the SMS signal received from the MPB and storing the SMS text data, which is an analysis result, in the SMS storage unit and transferring the SMS text data to the MPB. The method of claim 1, The CSLIB is an edge connector connected to the backplane board, a digital backplane interface device (DBID) interfaced with a highway from the edge connector, and a voice channel is allocated from the DBID to receive digital signals from the SMS phone. A CODEC for processing voice signals as an analog signal, an SLT I / F unit to which the SMS phone is connected, a CPU for detecting ring control and loop control and a hook on / off of the SMS phone, and SMS digital data from the CPU It includes a CID generating unit for converting to a frequency shift keying (FSK) analog signal, The CPU delivers the SMS text data transmitted from the MPB to the CID generation unit, and transmits the SMS analog signal converted by the CID generation unit to the SMS phone through the SLT I / F unit. The method of claim 1, The DTIB includes an edge connector connected to the backplane board, a digital backplane interface device (DBID) interfaced with a highway from the edge connector, and a DASLI I / F unit to which the digital key phone is connected. And the DTIB is controlled by the CPU of the MPB through the DBID. The method of claim 1, When the DTIB transmits the SMS text data to the digital key phone, the MPB monitors the state of the digital key phone via the DTIB and immediately sends an SMS text message. If the DTIB is off hook, the digital key phone is on hook. A keyphone system, waiting for a status, to send SMS text when on hook. The method of claim 1, It further includes a VOIB (VOip Interface Board) connected to any one of the computer and the IP phone to perform the softphone function, The MPB further includes a function for transmitting the SMS text data received from the SMSB to either one of the DTIB, the CSLIB, and the VOIB. The method of claim 7, wherein The SMS signal transmitted through any one of the CSLIB, the DTIB, and the VOIB is transferred to the SMSB and converted into an SMS PCM signal, and the CLCOB is off-hook controlled to transmit the SMS PCM signal to the PSTN network. , Keyphone system. A keyphone system having at least one extension board to which an extension telephone is connected and a backplane board on which a board for interfacing an external trunk line is installed. An external trunk line interface board connected to the external trunk line and distinguishing whether a signal input after detecting a ring signal is a CID signal or an SMS signal, and processing the CID signal; And When the signal divided by the external trunk line interface board is the SMS signal, the voice channel of the external trunk line and a specific extension board is connected, and the SMS signal is converted into SMS text data and transmitted to the corresponding extension board through the connected voice channel. And a main processing board for processing the CID signal by distinguishing it from the SMS signal. A Caller Single Line Interface Board (CSLIB) of the extension board converts the SMS text data into a frequency shift keying (FSK) and provides the key phone system. The method of claim 9, The extension board includes a CSIB connected to an SMS phone, a Digital Telephone Interface Board (DTIB) connected to a digital key phone, a VOIB (VOip Interface Board) connected to any one of a computer and an IP phone performing a soft phone function. A keyphone system comprising at least one of. The method of claim 9, The external trunk line interface board is a caller id loop start CO line board (CLCOB) for distinguishing and outputting whether a data received through the external trunk line is a CID (Caller ID) signal or an SMS signal after detecting a ring signal. The method of claim 11, The main processing board, A main processor board (MPB) for receiving a ring detection signal and board state information from the CLCOB to control the operation of the system and performing a voice channel switching function; A Short Messaging Service Board (SMSB) for analyzing the SMS signal received through the MPB and delivering the SMS text data to the MPB as a result of the analysis; The MPB transfers the SMS signal to the SMSB by connecting the CLCOB and the voice path of the SMSB upon receiving a ring detection signal from the CLCOB, and transmits the SMS text data from the SMSB to one of the DTIB and the CSLIB. And processing the CID signal separately from the SMS signal.

Images