KR20040016518A - APPARATUS AND METHOD FOR CALL SET-UP BETWEEN WIRE/WIRELESS TELEPHONES AND VoIP TELEPHONES - Google Patents

Abstract

PURPOSE: An apparatus and a method for setting a call between a wired/wireless telephone and a VoIP(Voice over Internet Protocol) telephone are provided to make a call between an origination-side wired/wireless telephone and a termination-side VoIP telephone by setting the call between the origination-side wired/wireless telephone and the termination-side VoIP telephone corresponding to an extension number and mutually converting a PCM(Pulse Code Modulation) signal of a wired/wireless communication network and a VoIP signal of an IP network. CONSTITUTION: A PCM line switch(205) connects selected PCM lines among PCM lines of a private exchange equipment(201) and a voice codec converter(209) according to a switching control signal. A DTMF(Dual Tone Multi Frequency) tone generator(207) provides a signal according to a call setup procedure to the private exchange equipment(201) according to a control signal. The voice codec converter(209) converts a PCM signal inputted from the PCM line switch(205) into a voice digital signal, and outputs the voice digital signal. The voice codec converter(209) converts an inputted voice digital signal into a voice PCM signal, and outputs the voice PCM signal to the PCM line switch(205) through the corresponding PCM line. If a calling signal is sensed from the specific PCM line among the extension PCM lines of the private exchange equipment(201), a control unit sets a call with the private exchange equipment(201). The control unit sets a VoIP call between VoIP telephones corresponding to the extension PCM lines through an IP network(111). The control unit generates the control signal, and connects the corresponding PCM line of the voice codec converter(209) with the extension PCM line of the private exchange equipment(201). The control unit processes the voice digital signal outputted from the voice codec converter(209), converts the voice digital signal into VoIP format data, and transmits the VoIP format data to the VoIP telephone through the IP network(111). The control unit processes VoIP format data received from the VoIP telephone, extracts a voice digital signal, and transmits the voice digital signal to the voice codec converter(209).

Description

Call setting device and method between wired / wireless phone and V.IP phone {APPARATUS AND METHOD FOR CALL SET-UP BETWEEN WIRE / WIRELESS TELEPHONES AND VoIP TELEPHONES}

The present invention relates to a call setup apparatus and method, and more particularly, to a call setup apparatus and method between a wired / wireless telephone and a VoIP telephone.

Currently, two-way call service between wired / wireless communication networks (eg, PSTN, mobile wireless networks) and Internet Protocol (IP) networks is not implemented. That is, calls from voice over internet protocol (VoIP) phones to wired / wireless phones are serviced, whereas calls from wired / wireless phones to VoIP phones are not serviced.

Currently, the development of SIGTRAN (Signaling Transport), which attempts to connect PSTN network and IP network based on IP based next generation network, is under discussion. When the PSTN network and the IP network are connected, a call service from the wired / wireless phone to the VoIP phone is possible, but the connection between the PSTN network and the IP network can be realized only when a large-scale professional system is introduced on the carrier side. Do.

On the other hand, an IP-based premises exchange system (IP-PABX system) that consists of the existing private exchange system only IP network is currently commercialized. The management of the premises switching network is integrated with the existing data network, which makes it easy to maintain and easily apply additional services. With IP-PABX, all phones in the premises are replaced with VoIP phones, and PSTN gateways are installed at the interface between the enterprise and external PSTN networks to relay incoming and outgoing calls.

However, this IP-PABX system will implement the existing private switching system in a different form, and does not provide any additional advantages. For example, when a caller calls from outside, if the recipient of the extension is away due to a business trip or the like, the caller cannot call.

Therefore, it is very convenient if an external caller can call the receiver at a low price, regardless of whether the subscriber is in the country as well as anywhere in the world by simply registering the system.

In addition, in order to introduce an IP-PABX system, a company in which an existing private exchange system is installed has a problem in that its cost is increased because the entire system needs to be changed.

The present invention is derived from such a situation, it is unnecessary to modify the existing wired / wireless communication network and IP network, and can be easily implemented in existing private switching equipment, the external calling party wired / wireless telephone and the called party (registered subscriber) An object of the present invention is to provide a call setup device and method between VoIP phones.

Furthermore, in the present invention, when an extension number is keyed in from an external calling party's wired / wireless telephone, the call is set (via an IP network) in the called VoIP telephone period corresponding to the extension number, and the wired / wireless is set. It is an object of the present invention to provide an apparatus and method for enabling a call between the calling / wireless telephone and the called VoIP telephone period by converting a PCM signal of a communication network and a VoIP signal of an IP network from each other.

Furthermore, when the call signal is detected from any one PCM line among the extension PCM lines of the private switching equipment, the present invention sets up a call in the VoIP telephone period corresponding to the extension PCM line, and establishes the PCM of the wired / wireless communication network. It is an object of the present invention to provide an apparatus and method for converting a signal and a VoIP signal of an IP network into a format so that a call can be made during the calling / wireless telephone and the called VoIP telephone.

Furthermore, the present invention detects a DTMF signal transmitted through an extension PCM line of a private switching equipment in which a call has occurred, establishes a call in a VoIP telephone period corresponding to the detected DTMF signal, and establishes a PCM of a wired / wireless communication network. It is an object of the present invention to provide an apparatus and method for converting a signal and a VoIP signal of an IP network into a format so that a call can be made during the calling / wireless telephone and the called VoIP telephone.

Furthermore, the present invention detects DTMF signals transmitted from PCM lines of a plurality of wireless modems performing wireless communication with a wireless telephone network, sets up a call in a VoIP telephone period corresponding to the detected DTMF signals, and establishes a wired / wireless connection. It is an object of the present invention to provide an apparatus and method for converting a PCM signal of a communication network and a VoIP signal of an IP network into a format so that a call can be made during the calling / wireless telephone and the called VoIP telephone period.

Furthermore, in the present invention, a call agent stores a called number matching an IP address of a predetermined VoIP telephone registered by a subscriber in a gatekeeper, and when an extension number (called number) is input from an external calling / wireless telephone, Contact the gatekeeper to find the called VoIP phone, and establish a call in the VoIP telephone period by the call setup procedure of the call agent, gatekeeper and VoIP telephone period, and connect the PCM signal and IP of the wired / wireless communication network. By converting the VoIP signal of the network to each other, a call is possible during the calling / wireless telephone and the called VoIP telephone period. The VoIP format processing and data transmission / reception between the VoIP telephones are performed by a media gateway. It is an object of the present invention to provide an apparatus and a method to be performed.

1 is a diagram showing an overall system configuration to which the present invention is applied.

2 is a diagram showing an internal configuration of a call setup device of the present invention.

3A illustrates an embodiment of a call setup procedure between a calling wired / wireless telephone and a called VoIP telephone.

3b is another embodiment illustrating a call setup procedure between a calling party / wireless telephone and a calling party VoIP telephone;

4 is a diagram illustrating a call setup procedure between an external wired / wireless telephone and a registered landline telephone.

5 is a diagram illustrating a call setup procedure between a registered landline telephone (including an extension telephone) and a wireless telephone.

FIG. 6A illustrates an example of a call setup procedure between a calling party VoIP telephone and a called party external wired / wireless telephone; FIG.

6B illustrates another example of a call setup procedure between the calling VoIP phone and the called external external wired / wireless phone.

7 is an example of a called number registered by a subscriber in accordance with the present invention.

According to an aspect of the present invention for achieving the above object, the present invention provides a call setup device between a wired / wireless telephone and a VoIP telephone, the extension PCM lines of private switching equipment and PCM lines of voice codec converter A PCM line switch connected to the selected one of the PCM lines according to a switching control signal; A DTMF tone generator connected to the extension PCM lines of the private switching equipment and providing a signal according to a call setup procedure to the private switching equipment according to a control signal; The voice codec converter converting the PCM signal input from the PCM line switch into a voice digital signal, and converting the input voice digital signal into a voice PCM signal and outputting the voice digital signal to the PCM line switch through the corresponding PCM line; And when a call signal is detected from a specific PCM line among the extension PCM lines of the private switching equipment, establishes a call in a VoIP telephone period corresponding to the extension PCM line, generates the switching control signal, and generates the call signal. Connect the detected PCM line of the private exchanger and the corresponding PCM line of the voice codec converter, process the voice digital signal output from the voice codec converter, convert the voice digital signal into a VoIP format, transmit the voice digital signal to the VoIP phone, and send the VoIP And a controller which processes the VoIP format data received from the phone, extracts a voice digital signal, and transfers the voice digital signal to the voice codec converter.

As a result, the subscriber's VoIP called number can be found by using the extension function of the existing private switching equipment, and the subscriber can change the IP address of the VoIP phone that matches the VoIP called number by registering / updating. It does not require modification of wired / wireless communication network and IP network, and can be easily implemented in existing private switching equipment, and it is possible to set up a call between an external calling / wireless telephone and a destination VoIP telephone. The registration renewal of the service allows you to call anywhere, anywhere in the world with low call charges.

According to an auxiliary aspect of the present invention, a DTMF detector which is connected to the extension PCM lines of the private switching equipment for detecting the DTMF signal transmitted through each PCM line further comprises, the control unit to the detected DTMF signal It is characterized by setting up a call in the corresponding VoIP telephone period.

Accordingly, the present invention can operate independently of the operation of the private exchange equipment, and can be linked with the announcement function of the private exchange equipment to provide a more convenient service (eg, indirect connection number) to an external caller.

According to an auxiliary aspect of the present invention, the present invention further includes a plurality of wireless modems for performing wireless communication with a wireless telephone network, wherein the PCM line switch is connected to the PCM lines of the wireless modem.

Accordingly, in the present invention, even when an external caller makes a call to a registered wireless telephone number, the call can be set up between the external caller / wireless telephone and the destination VoIP telephone.

According to an auxiliary aspect of the present invention, the control unit includes a control processor for outputting a control signal to each component of the call setup device, a gatekeeper for storing a called number matching an IP address of registered VoIP phones; A call agent for performing a call establishment procedure with a corresponding VoIP phone through an IP network, and a media gateway for performing the VoIP format processing and responsible for data transmission / reception between the VoIP phones.

Accordingly, an operation for processing of the present invention can be applied to a function for performing VoIP call processing in an existing IP network, and a processor for directly controlling each function of the function and the call setup device can be distinguished.

This, a further additional aspect of the present invention will become more apparent through the preferred embodiments described below with reference to the accompanying drawings. Hereinafter, the present invention will be described in detail to enable those skilled in the art to easily understand and reproduce the present invention.

Fig. 1 shows the overall system configuration to which the present invention is applied, and Fig. 2 shows the internal configuration of the call setup device of the present invention. Hereinafter, a description will be given with reference to FIGS. 1 and 2.

The call setup device 110 between the wired / wireless telephones 117 and 119 and the VoIP telephone 103 according to the present invention includes the PCM lines of the extension of the private switching equipment 201 and the PCM line of the voice codec converter 209. And a PCM line switch 205 for connecting selected ones of the PCM lines according to a switching control signal 213; A DTMF tone generator connected to the extension PCM lines of the private exchange equipment 201 and providing a signal according to a call setup procedure to the private exchange equipment 201 according to a control signal; A voice codec that converts and outputs a PCM signal input from the PCM line switch 205 into a voice digital signal, and converts the input voice digital signal into a voice PCM signal and outputs it to the PCM line switch 205 through the corresponding PCM line. Transducer 209; And when a call signal is detected from a specific PCM line among the extension PCM lines of the private switching equipment 201, establishes a call with the private switching equipment 201, and connects to the extension PCM line through the IP network 111. Establish a VoIP call between the corresponding VoIP phone 103, generate a control signal 213 to connect the PCM line for the extension of the private switching equipment 201 to which the call is set and the corresponding PCM line of the voice codec converter 209; The voice digital signal output from the voice codec converter 209 is converted into a VoIP format and transmitted to the VoIP phone 103 through the IP network 111, and the VoIP phone 103 through the IP network 111. And a controller (not shown) for processing the VoIP format data received from the voice signal and extracting the voice digital signal to the voice codec converter 209.

At this time, the control unit includes a control processor 211 for outputting a control signal to each component of the call setup device 110 such as the PCM line switch 205, the voice codec converter 213, and the VoIP called number of each subscriber. A gatekeeper 109 for storing information and an IP address of the VoIP phone matching the VoIP called number (the IP address can be updated by the subscriber), and through the IP network 111, the VoIP A call agent 107 that performs a call setup procedure with the telephone 103, and a media gateway 109 that performs the VoIP format processing and is responsible for data transmission / reception between the VoIP telephones 103. have.

The control processor 211 may perform the functions of the gatekeeper 109 function, the call agent 107 function, and the media gateway 109 together, and in some cases (as shown in the drawing) a separate external device. The server 120 may perform the above functions.

Private switching equipment 201 is commonly used and is connected with wired communication network 113 via an external trunk line telephone line. In addition, the private exchange equipment 201 includes a plurality of extension PCM lines. Some of the extension PCM lines of the private switching equipment 201 may be connected to the extension telephone 101.

The private switching equipment 201 has a voice guidance function, and when a call is received from the wired telephone 117 and the wireless telephone 119, a call is sent to the caller to press a desired called number. When a caller key-in a general extension number (extension number), it detects the corresponding DTMF signal and generates a ring tone to the extension telephone 101 corresponding to the extension, and the calling side exchange on the wired communication network 113 side (shown in the drawing). No ringback tone). When the receiver receives the extension telephone 101, a call is set up between the calling / wireless telephones 117 and 119 and the receiving extension telephone 101. Since the call setting procedure of the private exchange equipment 201 and the calling party exchange period corresponds to a known technique, a detailed description thereof will be omitted.

On the other hand, when the caller presses the VoIP called number according to the present invention, the private switching equipment 201 detects the corresponding DTMF signal and generates a call signal on the extension PCM line corresponding to the called number. As a result, its own operation of the private exchange equipment 201 is the same as the conventional one.

The PCM line switch 205 is connected to the extension PCM lines of the private switching equipment 201 and the PCM lines of the voice codec converter 209 and is selected according to the switching control signal 213. The PCM line of converter 209 is connected.

The voice codec converter 209 converts and outputs the PCM signal input through the PCM line into a voice digital signal, converts the input voice digital signal into a voice PCM signal, and converts it to a PCM line switch 205 through the PCM line. Will output The voice codec converter 209 digitizes the PCM signal expressed in analog so as to be suitable for data communication.

The control processor 211 detects a call signal from the PCM line corresponding to the VoIP called number among the extension PCM lines of the private switching equipment 201. At this time, the control processor 211 can recognize the called number from the position of the PCM line where the call signal is generated even without detecting the DTMF signal. The control processor 211 finds the VoIP telephone 103 corresponding to the VoIP called number, i.e., corresponding to the extension PCM line where the call signal is generated.

According to the present invention, the subscriber can register and renew the IP address of the VoIP telephone that matches his VoIP destination number. If the subscriber is traveling outside, register the IP address of a device that provides VoIP telephony (available through Netmeeting, a commercial program provided by Windows). . The called number information and IP address information of the VoIP telephone that matches the called number and can be updated by registration of a subscriber are stored and managed in a predetermined storage medium. The information can be stored and managed by the gatekeeper 109.

As described above, the control processor 211 may search for the information, find the VoIP phone 103 matching the VoIP destination number, and perform a VoIP call setup procedure with the corresponding IP address. Here, the VoIP call setup procedure between the control processor 211 and the VoIP phone 103 is known. The VoIP call setup procedure will be described later. In addition, the control processor 211 may perform a VoIP call setup procedure using the call agent 107 and the gatekeeper 109 functions, and as illustrated, these functions may be provided outside the control processor 211. have.

When the VoIP call setup procedure is completed, the control processor 211 generates a switching control signal 213 to determine the extension PCM line and voice codec converter 209 of the private switching equipment 201 in which the call signal is detected. Connect the PCM line. As a result, a call is connected between the wired / wireless telephones 117 and 119 of the external caller and the VoIP telephone 103 of the called party.

Then, the control processor 211 processes the voice digital signal output from the voice codec converter 209, converts it into a VoIP format, transmits it to the VoIP phone 103, and the VoIP format data received from the VoIP phone 103. Is processed to extract the speech digital signal and transfer it to the speech codec converter 209.

Here, the control processor 211 can use the media gateway 105 function to perform the VoIP format processing and to perform data transmission / reception between the VoIP telephones. 211 may be provided outside. The function of this media gateway 105 is a known technique. When the media gateway 105 is separated and provided to the external server 120, the control processor 211 converts a data format for a signal transmitted / received between the voice codec converter 209 and the media gateway 105. (E.g. RTP <-> HDLC).

As described above, the call setup device 110 between the wired / wireless telephones 117 and 119 and the VoIP telephone 103 according to the present invention uses the extension function of the existing private switching equipment to call the subscriber's VoIP called number. Since the subscriber can change the IP address of the VoIP phone that matches the VoIP recipient's number by registering / updating, modification of the existing wired / wireless communication networks 113 and 115 and the IP network 111 is unnecessary. It can be simply implemented in the existing private switching equipment 201 to further reduce the cost, it is possible to set up a call between the external caller / wireless phone and the destination VoIP phone, the destination VoIP phone 103 is a subscriber Registration renewal allows you to call anywhere, anywhere in the world with low call rates.

In addition, an operation for processing of the present invention may be applied to a function of performing VoIP call processing in an existing IP network, and a processor for directly controlling a component for performing the function and each component of a call setup apparatus may be divided. There is a number.

Meanwhile, as shown in FIG. 2, the DTMF detector 207 is connected to the extension PCM lines of the private exchange equipment 201 to detect the DTMF signal transmitted through each PCM line. Therefore, regardless of how the announcement function of the private switching equipment 201 is implemented, the control processor 211 receives DTMF signals, ie, VoIP called numbers, which are keyed in from the caller / wireless telephones 117 and 119. Can be recognized.

At this time, the control processor 211 has its own announcement function, it is possible to make a announcement (for example, please press the desired VoIP called number) through the corresponding extension PCM line.

In an embodiment, the call setup device 110 according to the present invention receives a DTMF signal by firstly providing a announcement from the private exchange equipment 201, and secondly by a guidement from the control processor 211. Can receive a signal.

Since the VoIP called number of the present invention is the same as a normal (telephone number + extension number) system, there is little possibility of confusion for external users. However, there may be difficulties in use, and external users may not know the VoIP called number. Therefore, the private switching device 201 may primarily say, "If you do not know the VoIP destination number of the person you want to call, press 0 (indirect connection number)." When the external user presses the '0', the private switching equipment 201 allocates the PCM extension line corresponding to the indirect connection number and generates a call signal. Then, the control processor 211 may request to press an extension number, a mobile phone number, etc. of the person to be secondaryly called. When an external user presses, for example, a mobile phone number, the control processor 211 can retrieve the called party corresponding to the mobile phone number from the storage medium in which the incoming information is stored and find out the called party's VoIP incoming number.

On the other hand, as shown in FIG. 2, the call setup device 110 further includes a plurality of wireless modems 203 for performing wireless communication with the wireless communication network 115, the PCM line switch 205 is a wireless modem Connected to the PCM lines of 203. When an external caller makes a call to one of the wireless modems 203, a call signal is generated on the PCM line of the wireless modem 203, and the control processor 211 recognizes this and makes a announcement to the PCM line. do. Then, the external caller key in the VoIP called number, and the DTMF tone controller 207 detects the DTMF signal according to the key input. Therefore, according to the present invention, even when an external caller makes a call to the wireless telephone number registered in the apparatus 110 of the present invention, a call can be established between the external calling party / wireless telephone and the called party VoIP telephone.

3A illustrates an embodiment of a call setup procedure between a calling wired / wireless telephone and a called VoIP telephone.

The call setup method between the wired / wireless telephone and the VoIP telephone according to the present invention is a call setup method between the wired / wireless telephones 117 and 119 and the VoIP telephone 103. Storing the IP address of the VoIP telephone 103 matching the VoIP called number, the IP address being renewable by the subscriber; When the control processor 211 detects a call signal from any of the extension PCM lines of the extension PCM lines of the private switching equipment 201, establishing a call with the private switching equipment 201; The control processor 211 finding a VoIP phone 103 corresponding to the extension PCM line; Establishing a VoIP call between the VoIP telephones (103) via an IP network (111); The PCM signal transmitted through the extension PCM line is processed and converted into a VoIP format and transmitted to the VoIP phone, and the VoIP format data received from the VoIP phone 103 is processed into a PCM signal, which is converted into Transmitting through a line PCM line; characterized in that comprises a.

Hereinafter, FIG. 3A will be described with reference to FIG. 2. 3A assumes that the call processor 107 function, the gatekeeper 109 function, and the media gateway 105 function are separated from each other in the control processor 211.

When a call (eg, a representative phone) is received from the wired / wireless telephones 117 and 119, the private switching equipment 201 makes a announcement, and when an external caller enters a VoIP called number according to the present invention, the corresponding DTMF The signal is detected and a call signal is generated on the extension PCM line corresponding to the number (301a).

Then, the control processor 211 transmits a control signal (hook-off signal transmission command) to the DTMF tone generator 207 and connects a call with the private exchange equipment 201 (313a). Previously, the control processor 211 may query the gatekeeper 109 through the call agent 107 to check whether the call is to be connected in response to a call signal generated from the private switching equipment 201 (305a). 307a, 309a, 311a). Steps 305a, 307a, 309a, and 311a may be usefully used in a tariff system in which a called party bears a call cost.

The control processor 211 finds the VoIP telephone 103 corresponding to the extension PCM line where the call has occurred (315a, 317a, 319a, 321a). At this time, the control processor 211 queries the gatekeeper 109 through the call agent 107 to find the corresponding VoIP phone 103. The gatekeeper 109 stores VoIP subscriber number information of each subscriber and the IP address of the VoIP telephone 103 matching the VoIP recipient number, and the IP address can be updated by the subscriber.

That is, the control processor 211 can recognize the VoIP called number from the position of the extension PCM line where the call is generated, and inquires the VoIP dialed number to the gatekeeper 109 to call the corresponding VoIP phone 103. I can find it.

Then, the control processor 211 establishes VoIP calls between the VoIP phones 103 via the IP network 111 (315a to 341a). In this case, the control processor 211 uses the call agent 107 and the gatekeeper 109. However, since the VoIP call setup procedure itself between the call agent 107, the gatekeeper 109 and the VoIP phone 103 corresponds to a known technique, a detailed description thereof will be omitted. Herein, when the control processor 211 receives the Alerting 'signal from the call agent 107 (335a), the control processor 211 may control the DTMF tone generator 207 to transmit the ringback tone to the corresponding PCM line for the extension.

The control processor 211 generates a control signal with the PCM line switch 205 and connects the corresponding PCM line of the private extension equipment 201 to which the call is set and the corresponding PCM line of the voice codec converter 209 (the 3A), the voice digital signal output from the voice codec converter 209 is processed, converted into a VoIP format, and transmitted to the VoIP phone 103 via the IP network 111, and the IP network 111 is transmitted. Processing the VoIP format data received from the VoIP phone 103 via the &lt; RTI ID = 0.0 &gt;) &lt; / RTI &gt; extracts the voice digital signal and delivers it to the voice codec converter 209 (343a to 349a).

At this time, the control processor 211 may use the media gateway 105 to perform the VoIP format processing function and the data transmission / reception function between the VoIP phone 103. Since steps 347a and 349a correspond to known techniques, detailed descriptions thereof will be omitted.

According to the signal processing procedure of FIG. 3A described above, the subscriber's VoIP called number is found by using the extension function of the existing private switching equipment, and the subscriber registers / updates the IP address of the VoIP phone that matches his VoIP called number. It is possible to change the existing network, so it is not necessary to modify existing wired / wireless communication network and IP network, and it can be easily implemented in existing private switching equipment, and it is possible to set up a call between an external calling / wireless telephone and a called VoIP telephone. In addition, the destination VoIP phone is not limited to the place by the subscriber's registration renewal, and the call service is available anywhere in the world with low call charges.

Meanwhile, as described above, when a call signal is detected from any one of the extension PCM lines of the extension PCM lines of the private exchange equipment 201, a call with the private exchange equipment 201 is established. According to an example, the DTMF tone detector 207 may be added to detect the DTMF signal transmitted through the PCM line for which the call is set.

Accordingly, the present invention can operate independently of the operation of the private exchange equipment, and can be linked with the announcement function of the private exchange equipment to provide a more convenient service (eg, indirect connection number) to an external caller.

3b is another embodiment illustrating a call setup procedure between the calling wired / wireless telephone and the called VoIP telephone.

The call setup method between the wired / wireless telephone and the VoIP telephone according to the present invention is a call setup method between the wired / wireless telephones 117 and 119 and the VoIP telephone 103. Storing the IP address of the VoIP telephone 103 matching the VoIP called number, the IP address being renewable by the subscriber; When the control processor 211 detects a call signal from any one of the PCM lines of the plurality of wireless modems 203 performing wireless communication with the wireless communication network 115, the call with the called wireless modem 203 is detected. Setting up; Detecting, by the control processor (211), a DTMF tone signal from the PCM line of the radio modem (203) to which the call is set up; Finding a VoIP telephone 103 corresponding to the detected DTMF tone signal; Establishing a VoIP call between the VoIP telephones (103) via an IP network (111); The PCM signal transmitted through the PCM line of the wireless modem set up is processed and converted into a VoIP format and transmitted to the VoIP phone. The VoIP format data received from the VoIP phone 103 is processed into a PCM signal. And transmitting the call through the PCM line of the wireless modem in which the call is set.

Hereinafter, FIG. 3B will be described with reference to FIG. 2. 3B assumes that the call processor 107 function, the gatekeeper 109 function, and the media gateway 105 function are separated from each other in the control processor 211.

When a call (registered wireless telephone number) is received from the wired / wireless telephones 117 and 119 (301b), the wireless modem 203 generates a call signal on its PCM line (303b). At this time, the wireless modem 203 may transmit the caller's telephone number information through a serial line connected to the control processor 211.

Then, the control processor 211 transmits a call connection command to the wireless modem 203 where the call occurred through the serial line, and transmits the announcement to the PCM line of the wireless modem 203 to which the call is established (313b). Before performing the 313b procedure, the control processor 211 inquires of the gatekeeper 109 through the call agent 107 to check whether to connect the call in response to the call signal generated from the wireless modem 203. This can be done (305b, 307b, 309b, 311b). Steps 305b, 307b, 309b, and 311b may be usefully used for a charge system and a call blocking function in which a called party bears a call cost.

When the external caller keyes in the called number to the wired / wireless telephones 117 and 119 (315b), the DTMF detector 207 detects the DTMF signal transmitted through the corresponding PCM line (317b). The control processor 211 then finds the VoIP telephone 103 corresponding to the PCM line of the radio modem 203 to which the call is established (319b, 321b, 323b, 325b). At this time, the control processor 211 queries the gatekeeper 109 through the call agent 107 to find the corresponding VoIP phone 103. The gatekeeper 109 stores VoIP subscriber number information of each subscriber and the IP address of the VoIP telephone 103 matching the VoIP recipient number, and the IP address can be updated by the subscriber.

Then, the control processor 211 establishes a VoIP call between the VoIP phones 103 via the IP network 111 (319b to 345b). In this case, the control processor 211 uses the call agent 107 and the gatekeeper 109. However, since the VoIP call setup procedure itself between the call agent 107, the gatekeeper 109 and the VoIP phone 103 corresponds to a known technique, a detailed description thereof will be omitted. Herein, when the control processor 211 receives the Alerting 'signal from the call agent 107 (339b), the control processor 211 may control the DTMF tone generator 207 to transmit the ringback tone to the corresponding PCM line.

The control processor 211 generates a control signal with the PCM line switch 205 to connect the PCM line of the wireless modem 203 to which the call is set and the corresponding PCM line of the voice codec converter 209 (see FIG. 3B). Not shown.), The voice digital signal output from the voice codec converter 209 is converted into a VoIP format and transmitted to the VoIP phone 103 through the IP network 111, and through the IP network 111 The VoIP format data received from the VoIP phone 103 is processed to extract a voice digital signal, which is then transmitted to the voice codec converter 209 (347b to 353b).

At this time, the control processor 211 can perform the VoIP format processing function and the data transmission / reception function between the VoIP phone 103 by using the media gateway 105. Steps 351b and 353b correspond to known techniques, and thus detailed descriptions thereof will be omitted.

According to the signal processing procedure of FIG. 3B described above, the present invention can set up a call between an external caller / wireless telephone and a destination VoIP telephone even when an external caller calls a registered wireless telephone number. .

4 shows a call setup procedure between an external wired / wireless telephone and a registered landline telephone.

When a telephone (registered wireless telephone number) is received from the wired / wireless telephones 117 and 119 (401), the wireless modem 203 generates a call signal on its PCM line (403). At this time, the wireless modem 203 may transmit the caller's telephone number information through a serial line connected to the control processor 211.

Then, the control processor 211 transmits a call connection command to the wireless modem 203 where the call occurred through the serial line, and transmits the announcement to the PCM line of the wireless modem 203 to which the call is established (413). Before performing the procedure 413, the control processor 211 inquires of the gatekeeper 109 through the call agent 107 to check whether to connect the call in response to the call signal generated from the wireless modem 203. (405, 407, 409, 411). Steps 405, 407, 409, and 411 may be usefully used for a charge system and a call blocking function in which a called party bears a call cost.

When the external caller keyes in the called number to the wired / wireless telephones 117 and 119 (415), the DTMF detector 407 detects the DTMF signal transmitted through the corresponding PCM line (417). 211 finds the VoIP phone 103 corresponding to the PCM line of the wireless modem 203 to which the call is established (419, 421, 423, 425). At this time, the control processor 211 queries the gatekeeper 109 through the call agent 107 to find the corresponding VoIP phone 103.

The gatekeeper 109 stores, for each subscriber, VoIP called number information, IP address of the VoIP telephone 103 matching the VoIP called number, and called numbers such as extension numbers, landline numbers, and wireless telephone numbers. Priority information is stored in the called number. The gatekeeper 109 informs the control processor 211 of the corresponding called number (e.g., extension number) according to the next priority if the VoIP phone 103 is not logged in or is not currently registered in the RAS procedure. Reference).

In the embodiment of FIG. 4, the subscriber's extension telephone number information is transmitted to the control processor 211 according to the priority (step 425). The control processor 211 allocates a predetermined PCM extension line of the private switching equipment 201 and provides the called number (extension number) information to the DTMF tone generator 207. Accordingly, the DTMF tone generator 207 sends a hook-off signal to the assigned PCM extension line, and transmits a dial tone corresponding to the extension number (429).

Then, the private switching equipment 201 generates a ring tone to the corresponding extension telephone 101 (431), and when the called party picks up the receiver (423), it notifies the control processor 211 through the assigned extension PCM line ( 435). Then, the control processor 211 provides a control signal to the PCM line switch 205, and connects the PCM line of the wireless modem in which the call is set with the assigned PCM line to make a call (437).

5 shows a call setup procedure between a registered landline telephone (including an extension telephone) and a wireless telephone.

When a call (for example, a representative telephone or a called number) is received from a registered landline or extension telephone 117 or 101, the private exchange equipment 201 makes a announcement, and when the caller keyes in the corresponding DTMF signal, Detecting and generating a call signal to the extension PCM line corresponding to the number (501). At this time, the private exchange equipment 201 may detect the DTMF signal corresponding to the indirect connection number (eg, '0'). Then, the private switching equipment 201 allocates the PCM line for the extension corresponding to the indirect connection number and generates a call signal.

Then, the control processor 211 sends a control signal (hook-off signal transmission command) to the DTMF tone generator 207 to connect a call with the private switching equipment 201, and the indirect connection number extension PCM line to which the call is connected. Guide announcements through (513). Before performing the procedure 513, the control processor 211 inquires the gatekeeper 109 through the call agent 107 to determine whether to connect the call in response to the call signal generated from the private switching equipment 201. Can be examined (505, 5075, 509, 511). Steps 5055, 507, 509, and 511 may be usefully used in a tariff system in which a called party bears a call cost.

On the other hand, the control processor 211 secondly, the announcement request to press the other called number of the called party, such as the extension number, mobile phone number of the person to be called. When an external user presses, for example, a wired telephone number (515), the DTMF detector 207 detects a DTMF signal transmitted through the corresponding PCM line (517), and the control processor 211 stores the subscriber's incoming information stored therein. The called party corresponding to the landline number can be searched in the medium to find out the called party's VoIP destination number (519, 521, 523, 525).

However, in the embodiment of FIG. 5, when the VoIP call 103 corresponding to the VoIP called number is not logged in or not registered in the RAS procedure, the VoIP call cannot be set to the VoIP called number. Fig. 3 shows the case where a call is made to a stored wireless telephone number based on priority.

The control processor 211 selects a predetermined wireless modem 203 that is not operating and instructs 527 to dial the wireless telephone number via a serial line. Then, the wireless modem 203 interoperates with the wireless communication network 115 and transmits a call to the wireless telephone 119 (designated by the called subscriber) (529), and receives a call from the wireless telephone 119. The wireless modem 203 informs the control processor 211 that the call response is received through the serial line (533). Operations of the steps 529 and 531 are well known and thus detailed descriptions thereof will be omitted.

Then, the control processor 211 provides a control signal to the PCM line switch 205, and connects the PCM line of the call-set wireless modem and the PCM line for the indirect connection number to make a call (535).

6A illustrates an example of a call setup procedure between the calling VoIP phone and the called external wired / wireless phone.

The VoIP phone 103 requests a call to the control processor 211 through the call agent 107 (601a, 603a, 605a, 607a), and the control processor 211 identifies the calling party subscriber (609a, 611a, 613a and 615a, the call is made to the called telephone number (619a to 627a). When a call answering signal is transmitted from the called party's wired / wireless telephones 117 and 119 (629a and 631a), the control processor 211 transmits the alerting signals 633a and 635a through the call agent 107 to the VoIP telephone 103. And a Connect signal from the VoIP phone 103 (637a, 639a).

The control processor 211 generates a control signal with the PCM line switch 205 and connects the corresponding PCM line of the voice codec converter 209 with the corresponding PCM line of the private switching equipment 201 to which the call is set (the Not shown in FIG. 6A), the voice digital signal output from the voice codec converter 209 is processed and converted into a VoIP format, which is transmitted to the VoIP phone 103 via the IP network 111, and then the IP network 111. Processing the VoIP format data received from the VoIP phone 103 via the C-T, extracts the voice digital signal, and transfers the voice digital signal to the voice codec converter 209 (641a to 647a).

As shown in Fig. 6A, the VoIP telephone 103 on the subscriber side can make calls to the external wired / wireless telephones 117 and 119 using the call setup apparatus of the present invention. Therefore, if the employee of the subscriber company wants to call the customer with an external PC (the PC of the place of business), he can make a call using his system without using the equipment of the Internet telephone service provider. There is a number.

6B shows another example of a call setup procedure between the calling VoIP phone and the called external wired / wireless phone.

The VoIP phone 103 requests the call to the control processor 211 through the call agent 107 (601b, 603b, 605b, 607b), and the control processor 211 identifies the calling party subscriber (609b, 611b, 613b and 615b), and make a call to the called telephone number (619b and 621b). When call answering signals are transmitted from the called party's wired / wireless telephones 117 and 119 (623a and 625a), the control processor 211 transmits the alerting signals 627b and 629b through the call agent 107 to the VoIP telephone 103. And a Connect signal from the VoIP phone 103 (631b, 633b).

The control processor 211 generates a control signal with the PCM line switch 205 to connect the PCM line of the extension of the wireless modem 203 to which the call is set and the corresponding PCM line of the voice codec converter 209 (the above figure). (Not shown in FIG. 6b)), the voice digital signal output from the voice codec converter 209 is processed and converted into a VoIP format and transmitted to the VoIP telephone 103 via the IP network 111, and the IP network 111 Through processing the VoIP format data received from the VoIP phone 103 via the voice digital signal is extracted and transmitted to the voice codec converter 209 (635b to 641b).

As shown in Fig. 6B, the VoIP telephone 103 on the subscriber side can make calls to the external wired / wireless telephones 117 and 119 using the call setup apparatus of the present invention. Therefore, if the employee of the subscriber company wants to call the customer with an external PC (the PC of the place of business), he can make a call using his system without using the equipment of the Internet telephone service provider. There is a number.

As described above, according to the present invention, the subscriber's VoIP called number is found by using the extension function of the existing private switching equipment, and the subscriber registers / updates the IP address of the VoIP phone that matches his VoIP called number. It is possible to change it, so that modification of existing wired / wireless communication network and IP network is unnecessary, and can be easily implemented in existing private switching equipment, and a call can be set up between an external calling / wireless telephone and a called VoIP telephone. However, the destination VoIP phone is not restricted to the place by subscriber renewal, and the call service is available anywhere in the world with low call charges.

In addition, the present invention can operate independently of the operation of the private exchange equipment, it is possible to provide a more convenient service (eg indirect connection number) to the external caller in conjunction with the announcement function of the private exchange equipment.

In addition, according to the present invention, even when an external caller makes a call to a registered wireless telephone number, a call can be set up between an external calling / wireless telephone and a called VoIP telephone.

In addition, the operation for the processing of the present invention can be applied to the function of performing VoIP call processing in the existing IP network, and the part performing the function and the processor directly controlling each component of the call setup device are divided. Can be.

In addition, it is possible to make a telephone call to an external wired / wireless telephone by using the call setup device of the present invention from the VoIP telephone on the subscriber side. Therefore, if the employee of the subscriber company wants to call the customer with an external PC (the PC of the place of business), he can make a call using his system without using the equipment of the Internet telephone service provider. There is a number.

Claims (8)

In a call setup device between a wired / wireless telephone and a VoIP telephone, A PCM line switch connected to the extension PCM lines of the private switching equipment and the PCM lines of the voice codec converter and connecting selected ones of the PCM lines according to a control signal; A DTMF tone generator connected to the extension PCM lines of the private switching equipment and providing a signal according to a call setup procedure to the private switching equipment according to a control signal; The voice for converting the PCM signal input from the PCM line switch to the voice digital signal through the PCM line, and converts the input voice digital signal into a voice PCM signal and outputs it to the PCM line switch through the PCM line Codec converter; And When a call signal is detected from any of the extension PCM lines of the private switching equipment of the private switching equipment, the call is set up with the private switching equipment, and a VoIP call is set up in the VoIP telephone period corresponding to the extension PCM line, The control signal is generated to connect the PCM line of the extension of the private exchange in which the call signal is detected and the corresponding PCM line of the voice codec converter, to process the voice digital signal output from the voice codec converter to convert to the VoIP format. A control unit which transmits it to the VoIP phone, processes the VoIP format data received from the VoIP phone, extracts a voice digital signal, and transfers it to the voice codec converter; Call establishment apparatus between the wired / wireless telephone and the VoIP telephone, characterized in that configured to include. The method according to claim 1, A DTMF detector connected to the extension PCM lines of the private exchange equipment and detecting a DTMF signal transmitted through each PCM line, further comprising: And the control unit sets up a call in a VoIP telephone call period corresponding to the detected DTMF signal. The method according to claim 2, A plurality of wireless modems for performing wireless communication with the wireless telephone network is further included. And the PCM line switch is connected to the PCM lines of the wireless modem. The method according to any one of claims 1 to 3, The control unit, A control processor for outputting a control signal to each component of the call setup device; The gatekeeper stores VoIP subscriber number information of each subscriber and the IP address of the VoIP phone matching the VoIP recipient number, and the IP address can be updated by the subscriber. A call agent that performs a call setup procedure with the corresponding VoIP phone over the IP network; And a media gateway that performs the VoIP format processing and is responsible for data transmission / reception between the VoIP telephones. In a call setup method between a wired / wireless telephone and a VoIP telephone, A first step of storing VoIP subscriber number information of each subscriber and an IP address of a VoIP telephone that matches the VoIP recipient number, wherein the IP address can be updated by the subscriber; A second step of, if a call signal is detected from any one of the extension PCM lines of the private switching equipment, the call with the private switching equipment; Finding a VoIP phone corresponding to the extension PCM line; A fourth step of establishing a VoIP call in said VoIP telephony period via an IP network: and The PCM signal transmitted through the extension PCM line is processed and converted into a VoIP format and transmitted to the VoIP phone. The VoIP format data received from the VoIP phone is processed and converted into a PCM signal, which is then converted into the PCM line. Transmitting through the fifth step; Call setup method between a wired / wireless telephone and a VoIP telephone, characterized in that configured to include. In a call setup method between a wired / wireless telephone and a VoIP telephone, A first step of storing VoIP subscriber number information of each subscriber and an IP address of a VoIP telephone that matches the VoIP recipient number, wherein the IP address can be updated by the subscriber; When a call signal is detected from any one of the extension PCM lines of the private switching equipment, the call is established with the private switching equipment, and the DTMF signal transmitted through the extension PCM line where the call has occurred is detected. Second step; Finding a VoIP telephone corresponding to the detected DTMF signal; A fourth step of establishing a VoIP call in said VoIP telephony period via an IP network: and The PCM signal transmitted through the extension PCM line where the call is generated is converted into a VoIP format and transmitted to the VoIP phone, and the VoIP format data received from the VoIP phone is processed into a PCM signal, which is then called. A fifth step of transmitting through the generated extension PCM line; Call setup method between a wired / wireless telephone and a VoIP telephone, characterized in that configured to include. The method according to claim 6, The second step, A call establishment method between a wired / wireless telephone and a VoIP telephone, characterized by detecting a call signal from PCM lines of a plurality of wireless modems performing wireless communication with a wireless telephone network. The method according to any one of claims 5 to 7, The first step is, Performed by a gatekeeper, The third step, A call agent performs the contact with the gatekeeper, The fourth step, By the call setup procedure between the call agent, the gatekeeper and the VoIP phone, In the fifth step, And the VoIP format processing and data transmission / reception between the VoIP telephones are performed by a media gateway.