JP2006157160A - Ip adapter device, ip telephone set and ip telephone system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an IP adapter device to be connected to the opposite party of a global AIP address, such as urgent contact destination, and to provide an IP telephone set and an IP telephone system. <P>SOLUTION: In the IP telephone system 1, IP telephone adapters IPADP1, IPADP 2 store the global IP address of a nearest urgent contact destination IP telephone KIPPhS over an IP network IPNET and the telephone number of the opposite party into a RAM 13 so that they correspond to each other. When the telephone number of the opposite party stored in the RAM 13 is inputted from telephone devices Ph1, Ph2, the system performs a connection request with respect to the global IP address stored in the RAM 13, corresponding to the telephone number. Accordingly, direct connection can be made to the opposite-party of the global IP address, and usability can be improved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an IP adapter device, an IP phone device, and an IP phone system, and more particularly, to an IP adapter device, an IP phone device, and an IP phone system that can be connected to a destination having a global AIP address such as an emergency contact.

  Broadband services that use ADSL (Asymmetric Digital Subscriber Line), FTTH (Fiber To The Home), and cable nets have become widespread, and IP (Internet Protocol) telephones that use the IP (Internet Protocol) network to send audio It is spreading (see Patent Document 1).

  The IP phone uses a technology for realizing a voice call on an IP network called VoIP (Voice over IP). A communication protocol called 323 is standard recommended by ITU-T. Further, another protocol called SIP (Session Initiation Protocol) is defined by IETF (Internet Engineering Task Force).

  An IP telephone has a lower communication cost than a telephone using a public line, and a conventional public line telephone can be used by using an IP telephone adapter.

  The IP telephone adapter is equipped with a VoIP function, realizes a voice call using an IP network, and can switch and use a telephone using a public line. These switching can be performed from a telephone.

  In order for an IP phone to receive a call from the other party, the IP phone must have a phone number, but in recent years, the Ministry of Internal Affairs and Communications has started assigning a dedicated IP phone number to a provider or the like. The IP phone dedicated number is an 11-digit phone number starting from 050, and the provider providing the IP phone service is assigned a 4-digit number following the 050 as a carrier identification number, and a 4-digit number following the carrier identification number. A number is assigned to the user. A plurality of provider identification numbers are assigned to providers having many users.

  However, in the current service, even if the IP phone having the 050 number is subscribed to different providers, the IP phone may not be able to make a call. If a cooperative relationship between the providers has been established, Even if they are different, you can talk on the IP phone.

  That is, a private IP address is assigned to an IP phone, a global IP address is not assigned, and there is no IP phone in which a global IP address is registered as a destination IP address.

  As described above, although the IP telephone has a low communication cost, emergency contacts such as 110 and 119 are connected to the general telephone line, and therefore cannot be directly connected to the emergency contact from the IP telephone. .

  Conventionally, an IP phone is connected to an IP network and connected to a general telephone line via an IP phone receiving / transmitting device, and an IP address of an emergency contact is included in a connection request from the IP phone. An Internet telephone system for connecting to an emergency contact via a general telephone line from an IP telephone receiver / transmitter and an emergency line connection method thereof have been proposed (see Patent Document 2).

JP 2003-218987 A Japanese Patent No. 3139623

  However, in the prior art described in Patent Document 2, the IP telephone device can be connected to an emergency contact by connecting a general telephone line in addition to the IP network to the IP telephone device. Not only is the cost high, but there is a problem that when a general line is not connected, it is impossible to connect to an emergency contact and an emergency contact cannot be made.

  In the prior art, an IP phone is connected to a private network provided by a provider who is an IP phone carrier, and there is no IP phone in which a global IP address is registered as a destination IP address. There was a problem that a direct connection request could not be made to the destination with the address.

  Accordingly, by registering a global IP address, the present invention can make a direct connection request to the destination of the global IP address, for example, the nearest emergency contact number such as 110 or 119, and has good usability. An object of the present invention is to provide an IP adapter device, an IP telephone device and an IP telephone system provided with the IP adapter device.

  The IP adapter device according to claim 1 is connected between the telephone device and the IP network, exchanges voice data with the telephone device, packetizes the voice data from the telephone device, and An IP telephone adapter that transmits to an IP network and converts packet data from the IP network into voice data and passes the voice data to the telephone apparatus, and includes a global IP address of a destination on the IP network and a telephone of the destination When the telephone number stored in the storage means is input by the telephone device, the global IP stored in the storage means corresponding to the telephone number is stored. The above object is achieved by making a connection request to the address.

  In this case, for example, as described in claim 2, the telephone number and global IP address of the destination stored in the storage means may be the telephone number and global IP address of the nearest emergency contact. Good.

  For example, as described in claim 3, the IP telephone adapter device is a telephone business in which the destination telephone number and the global IP address stored in the storage unit are connected to the IP telephone adapter device. It is also possible to automatically register the telephone number and global IP address of the other party sent from the party device and sent to the storage means.

  According to a fourth aspect of the present invention, there is provided an IP telephone apparatus that is connected to an IP network, packetizes voice data, transmits the packet to the IP network, and converts the packet data from the IP network into voice data. The IP telephone adapter apparatus according to claim 1, wherein the IP telephone adapter apparatus is the IP telephone adapter apparatus according to any one of claims 1 to 3.

  An IP telephone system according to a fifth aspect of the present invention includes an IP telephone adapter device that is connected to an IP network, packetizes voice data, transmits the packet to the IP network, and converts packet data from the IP network into voice data. Alternatively, a plurality of externally provided IP telephone devices are connected to a telephone carrier device that performs a connection process between each IP telephone device and the IP network, and the telephone carrier device is connected to the connected IP telephone. Global IP address directly connected to the other IP telephone apparatus and the IP network via the connection between the apparatuses and the connected IP telephone apparatus and the other telephone carrier apparatus connected to the IP network An IP telephone system for connecting to an IP telephone apparatus having The IP telephone adapter device of the IP telephone device connected to the vendor device stores the global IP address of the IP telephone device directly connected to the IP network in the storage means in association with the dial number of the IP telephone device. When the telephone number stored in the storage means is input to the telephone device of the IP telephone adapter having the storage means for storing and storing the global IP address, the storage means corresponds to the telephone number. The above object is achieved by making a connection request to the stored global IP address.

  In this case, for example, as described in claim 6, the IP telephone system has the telephone number and the global IP address of the IP telephone apparatus directly connected to the IP network stored in the storage unit. The telephone number and global IP address of the nearest emergency contact may be used.

  Further, for example, as described in claim 7, the IP telephone system is configured such that the telephone number and the global IP address of an IP telephone apparatus directly connected to the IP network are changed from the telephone business apparatus to the telephone business apparatus. And the IP adapter device of the IP telephone device is stored in the IP telephone device and the global IP address of the IP telephone device directly connected to the transmitted IP network. It may be automatically registered in the means.

  According to the IP adapter device of the present invention, the global IP address on the IP network and the telephone number of the other party are stored in the storage means in association with each other, and the telephone number stored in the storage means is input by the telephone device. Then, by making a connection request to the global IP address stored in the storage unit corresponding to the telephone number, the destination of the global IP address, for example, an emergency contact number such as 110 or 119 It is possible to improve the usability by making a direct connection request to the nearest emergency contact.

  Further, according to the IP telephone apparatus of the present invention, the global IP address on the IP network and the telephone number of the other party are stored in the storage means in correspondence with each other, and the telephone number stored in the storage means is input. And an IP adapter device that makes a connection request to the global IP address stored in the storage means corresponding to the telephone number, so that the IP telephone device can send a destination of the global IP address, for example, 110 It is possible to improve the usability by directly requesting connection to the nearest emergency contact number among emergency contact numbers such as number and 119.

  Further, according to the IP telephone system of the present invention, the global IP address of the IP telephone apparatus directly connected to the IP network is stored in the storage means of the IP telephone adapter apparatus of the IP telephone apparatus connected to the telephone carrier apparatus. When a telephone number stored in correspondence with the dial number of the IP telephone apparatus is stored and stored in the storage means, the global IP address stored in the storage means corresponding to the telephone number is stored. By making a connection request, a direct connection request is made from the IP telephone device to the destination of the global IP address, for example, the nearest emergency contact number such as 110 or 119, and the usability is improved. be able to.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, since the Example described below is a suitable Example of this invention, various technically preferable restrictions are attached | subjected, However, The scope of the present invention limits this invention especially in the following description. As long as there is no description of the effect, it is not restricted to these aspects.

  1 to 3 are diagrams illustrating an embodiment of an IP adapter device, an IP telephone device, and an IP telephone system according to the present invention. FIG. 1 illustrates an IP adapter device, an IP telephone device, and an IP telephone system according to the present invention. 1 is a system configuration diagram of an IP telephone system 1 to which an embodiment is applied.

  In FIG. 1, in an IP telephone system 1, a plurality of IP telephone operators IPJ1 and IPJ2 are connected to an IP network IPNET, and a public telephone network PSTN is connected via a gateway GW.

  A plurality of IP telephones IPPh1 and IPPh2 are connected to each IP telephone service provider IPJ1 and IPJ2 via dedicated lines IPL1 and IPL2 such as FTTH and cable net, and each IP telephone IPPh1 and IPPh2 is an IP telephone adapter. IPADP1 and IPADP2 and normal telephone devices Ph1 and Ph2 are configured, or although not shown, the IP telephone device is configured with an IP telephone adapter.

  A plurality of general subscriber telephone devices PPh are connected to the public telephone network PSTN connected to the IP network IPNET via the gateway GW.

  The nearest emergency contact IP phone KIPPhS is connected to the IP network IPNET and the public telephone network PSTN. The nearest emergency contact IP phone KIPPhS is connected to the IP phone adapter KIPADP and the normal phone KPh and the gateway KGW and IP. The telephone device KIPPh is configured. The nearest emergency contact IP phone KIPPhS is not limited to the above configuration. For example, the gateway GW may be connected to the IP phone adapter KIPADP without providing the IP phone device KIPPh.

  The IP telephone adapters IPADP1 and IPADP2 and the IP telephone adapter KIPADP are generally configured as shown in FIG. 2, and include a telephone interface 11, a CPU (Central Processing Unit) 12, a RAM (Random Access Memory) 13, a ROM (Read Only Memory) 14, a communication unit 15, and the like, and each unit is connected by a bus line 16.

  Ordinary analog telephone devices Ph1, Ph2, and KPn are connected to the telephone interface 11, and the telephone interface 11 performs A / D conversion and D / A conversion of signals to and from the telephone devices Ph1, Ph2, and KPn. Send and receive signals.

  The communication unit 15 is connected to a dedicated line IPL1, IPL2, or IP network IPNET, and the communication unit 15 performs communication via the dedicated line IPL1, IPL2, or IP network IPNET.

  The ROM 14 stores a field basic program and necessary data as IP telephone adapters IPADP1, IPADP2, and KIPADP, and has a global IP address, for example, a dial number for emergency contacts such as 110 and 119 Is registered.

  The RAM 13 is used as a work memory for the CPU 12, and in the RAM 13 of the IP telephone adapters IPADP1 and IPADP2, for example, emergency contacts such as 110 and 119 are provided as destinations having global IP addresses registered in the ROM 14. When the previous dial number is registered, the global IP address of the nearest emergency contact IP phone KIPPhS of the nearest emergency contact is registered.

  The registration of the global IP address of the nearest emergency contact IP phone KIPPhS in the RAM 13 of the IP phone adapters IPADP1 and IPADP2 is performed when the owner of the IP phones IPPh1 and IPPh2 knows the global IP address. As the global IP address registration mode using Ph2, the global IP address of the nearest emergency contact IP phone KIPPhS may be entered into the RAM 13 to register the IP phone adapter IPADP1, In IPADP2, the IP address provider IPJ KIPPhS notifies the IP telephone operators IPJ1 and IPJ2 of the global IP address assigned to its own IP telephone KIPPhS, and each IP telephone operator IPJ1 and IPJ2 The global IP address of the nearest emergency contact IP phone KIPPhS is transmitted to the IP phones IPPh1 and IPPh2 connected to the IP phone operators IPJ1 and IPJ2, and the IP phone adapters IPADP1 and IPADP of the IP phones IPPh1 and IPPh2 The global IP address transmitted by the CPU 12 is automatically registered in the RAM 13. The nearest emergency contact IP telephone KIPPhS transmits the global IP address, the telephone number on the public telephone network PSTN, and the gateway GW, and the gateway GW registers the global IP address and telephone number, Used to convert phone numbers.

  The CPU 12 executes processing as the IP telephone adapters IPADP1 and IPADP2 based on the program in the ROM 14, and executes the nearest emergency contact IP telephone processing described later.

  Then, the IP telephone providers IPJ1 and IPJ2 are connected to the IP telephones IPPh1 and IPPh2 connected to the dedicated lines IPL1 and IPL2 of the IP telephone providers IPJ1 and IPJ2 and the other party connected via the IP network IPNET. I do.

  The gateway GW performs voice IP packetization and IP packet voice conversion, and enables connection between the IP network IPNET and the public telephone network PSTN.

  The gateway KGW of the nearest emergency contact IP telephone KIPPhS performs voice IP packetization and IP packet voice conversion, and enables connection between the IP telephone KIPPh and the public network PSTN.

  In such an IP telephone system 1, for example, when calling from IP telephone IPPh 1 to IP telephone IPPh 2, if the telephone number of IP telephone IPPh 2 is input by telephone apparatus Ph 1, the telephone is connected to the other party's IP telephone IPPh 2. Do.

  The content of the call at this time is transmitted from the telephone device Ph1 to the IP telephone adapter IPADP1 as analog voice, and the IP telephone adapter IPADP1 converts the analog voice signal from the telephone device Ph1 into a digital signal (voice encoding) to generate IP. The packet is packed and transmitted to the IP telephone provider IPJ1 via the dedicated line IPL1.

  The IP telephone provider IPJ1 sends the voice packet converted from the analog signal by the IP telephone adapter IPADP1 through the router on the IP network IPNET, and sends it to the IP telephone provider IPJ2 of the destination IP telephone IPPh2, The IP telephone provider IPJ2 transmits a voice packet to the destination IP telephone IPPh2 via the dedicated line IPL2.

  The destination IP phone IPPh2 converts the voice packet sent from the IP phone carrier IPJ2 into analog voice by the IP phone adapter IPADP2, sends it to the telephone device Ph2, and outputs the voice from the telephone device Ph2.

  An IP phone call is performed by performing the above processing between the IP phone IPPh1 and the IP phone IPPh2 via the IP network IPNET and the IP phone carriers IPJ1 and IPJ2.

  If the destination of the telephone call from the IP telephone IPPh1 is the general subscriber telephone apparatus PPh, the gateway GW converts the voice packet sent from the IP telephone carrier IPJ1 to the IP network IPNET into analog voice, and the public telephone network PSTN. Is sent to the other party's general subscriber phone PPh, and a normal telephone conversation is performed.

  Next, the operation of this embodiment will be described. The IP telephone system 1 according to the present embodiment can directly call the nearest emergency contact IP telephone KIPPhS from the IP telephones IPPh1 and IPPh2.

  That is, when calling the emergency contact from the IP phones IPPh1, IPPh2, simply dial the emergency contact phone number, for example, 110 or 119, etc. from the telephone devices Ph1, Ph2, and the emergency contact phone number. Can be connected to the nearest emergency contact IP phone KIPPhS.

  Assume that the IP phone IPPh1 contacts the nearest emergency contact IP phone KIPPhS. When the telephone number of the emergency contact is dialed by the telephone device Ph1, the IP telephone IPPh1 outputs an analog signal of the dialed number from the telephone device Ph1 to the IP telephone adapter IPADP1, and the CPU 12 of the IP telephone adapter IPADP1 receives the telephone device Ph1. When the dial number is input from, it is checked whether the dial number matches the emergency contact dial number registered in the ROM 14 in advance. When the dial number input by the telephone device Ph1 matches the dial number of the emergency contact registered in the ROM 14, the CPU 12 corresponds to the emergency contact registered in the RAM 13 in advance corresponding to the dial number of the emergency contact. The global IP address of the emergency contact IP phone KIPPhS that is the first emergency contact is read from the RAM 13 and a call request for the global IP address is made to the IP phone provider IPJ1.

  When there is a call origination request, the IP telephone provider IPJ1 calls the global IP address via the IP network IPNET and connects to the nearest emergency contact IP telephone KIPPhS connected to the IP network IPNET. The nearest emergency contact IP phone KIPPhS connects to the IP phone adapter IPADP1 of the IP phone IPPh1 via the IP phone carrier IPJ1 when the IP phone adapter KIPADP receives the global IP address addressed to itself. As in the case of the IP phone IPPh2, the telephone device Ph1 and the normal phone KPh can be conversed.

  When the telephone number of the emergency contact is dialed from the general subscriber telephone apparatus PPh connected to the public line network PSTN, the gateway KGW receives an incoming call via the public line network PSTN. Go and connect to IP phone KIPPh, or connect to IP phone adapter KIPADP when the nearest emergency contact IP phone KIPPhS is not IP phone KIPPh but has only gateway KGW and IP phone adapter KIPADP and normal phone KPh To do.

  Then, the registration of the global IP address of the nearest emergency contact IP phone KIPPhS to the RAM 13 of the IP phone adapters IPADP1 and IPADP2 of the IP phones IPPh1 and IPPh2 is automatically received in response to transmission from the IP phone operators IPJ1 and IPJ2. You can register.

  That is, the nearest emergency contact IP phone KIPPhS notifies the IP phone operators IPJ1 and IPJ2 of the global IP address assigned to its own IP phone KIPPhS, and each IP phone operator IPJ1 and IPJ2 The global IP address of the nearest emergency contact IP phone KIPPhS is transmitted to the IP phones IPPh1 and IPPh2 connected to the IP phone operators IPJ1 and IPJ2.

  Then, as shown in FIG. 3, the IP telephone adapters IPADP1 and IPADP of the IP telephones IPPh1 and IPPh2 receive the global IP address of the nearest emergency contact IP telephone KIPPhS from the IP telephone operators IPJ1 and IPJ2, respectively. Then, the communication unit 15 receives the global IP address (step S101), and the CPU 12 performs an emergency corresponding to the nearest emergency contact IP phone KIPPhS registered in the ROM 14 with the global IP address received by the communication unit 15 It is registered in the RAM 13 in correspondence with the dial number of the contact (step S102).

  The registration of the global IP address of the nearest emergency contact IP phone KIPPhS to the RAM 13 of the IP phone adapters IPADP1 and IPADP2 is as described above when the owner of the IP phones IPPh1 and IPPh2 knows the global IP address. In addition, as a global IP address registration mode using the telephone devices Ph1 and Ph2, the global IP address of the nearest emergency contact IP phone KIPPhS may be manually entered into the RAM 13 for registration.

  Thereafter, as described above, when the telephone numbers Ph1 and Ph2 dial the emergency contact number, the IP phones IPPh1 and IPPh2 are registered in the RAM 13 in correspondence with the emergency contact number. By making a connection request to the IP telephone providers IPJ1 and IPJ2 with the IP address, it is possible to make a call from the IP telephones IPPh1 and IPPh2 directly to the nearest emergency contact IP telephone KIPPhS as described above (step S103). .

  As described above, in the IP telephone system 1 according to the present embodiment, the IP telephone adapters IPADP1 and IPADP2 have the global IP address of the nearest emergency contact IP telephone KIPPhS that is a partner on the IP network IPNET and the telephone number of the partner. Are stored in the RAM 13 as storage means, and when the telephone number of the other party stored in the RAM 13 is input by the telephone devices Ph1 and Ph2, the global number stored in the RAM 13 corresponding to the telephone number is input. A connection request is made to the IP address.

  Therefore, it is possible to directly connect to the destination of the global IP address, and the usability can be improved.

  Further, the IP telephone system 1 of the present embodiment registers the telephone number and global IP address of the nearest emergency contact IP telephone KIPPhS in the RAM 13.

  Therefore, it is possible to directly connect from the IP telephones IPPh1 and IPPh2 to the nearest emergency contact among 110, 119 and other emergency contacts, and the usability can be further improved.

  Furthermore, in the IP telephone system 1 of the present embodiment, the IP telephone providers IPJ1 and IPJ2 have the telephone numbers of the other parties such as the nearest emergency contact IP telephone KIPPhS and the IP telephones IPPh1 and IPPh2 that they manage. The global IP address is transmitted, and the IP telephone adapters IPADP1 and IPADP2 of the IP telephones IPPh1 and IPPh2 automatically register in the RAM 13 the telephone numbers and global IP addresses of the counterparts that have been transmitted.

  Therefore, information on the destination of the global IP address such as the nearest emergency contact IP phone KIPPhS can be registered easily and reliably, and the usability can be further improved.

  INDUSTRIAL APPLICABILITY The present invention can be applied directly to an IP telephone apparatus incorporating an IP adapter apparatus that can be directly connected to the nearest emergency contact IP telephone, and an IP telephone system using these IP telephone apparatus and IP adapter apparatus. Can do.

1 is a system configuration diagram of an IP telephone system to which one embodiment of an IP adapter apparatus, an IP telephone apparatus, and an IP telephone system according to the present invention is applied. The block diagram of the IP telephone adapter of FIG. The flowchart which shows the registration process of the global IP address of the nearest emergency contact IP telephone by the IP telephone adapter of FIG. 2, and the connection process to the nearest emergency contact IP telephone.

Explanation of symbols

1 IP telephone system IPNET IP network IPJ1, IPJ2 IP telephone carrier IPPh1, IPPh2 IP telephone IPADP1, IPADP2 IP telephone adapter Ph1, Ph2 telephone equipment IPL1, IPL2 leased line GW gateway PSTN public telephone network KIPPhS nearest emergency IP telephone IP phone adapter KPh Normal phone KGW Gateway KIPPh IP phone device 11 Phone interface 12 CPU
13 RAM
14 ROM
15 Communication section 16 Bus line

Claims (7)

  Connected between the telephone device and the IP network to exchange voice data with the telephone device, packetize the voice data from the telephone device and send it to the IP network, and also from the IP network An IP telephone adapter device that converts data into voice data and passes the data to the telephone device, and stores the global IP address of the counterpart on the IP network and the telephone number of the counterpart in the storage means, When a telephone number stored in the storage means is input by the telephone device, a connection request is made to the global IP address stored in the storage means corresponding to the telephone number. IP phone adapter device.   2. The IP telephone adapter apparatus according to claim 1, wherein the telephone number and global IP address of the destination stored in the storage means are the telephone number and global IP address of the nearest emergency contact.   In the IP telephone adapter device, the telephone number and global IP address of the other party stored in the storage means are transmitted from the telephone carrier apparatus to which the IP telephone adapter apparatus is connected. 3. The IP telephone adapter apparatus according to claim 1, wherein the telephone number and the global IP address are automatically registered in the storage unit.   An IP telephone apparatus that is connected to an IP network and packetizes voice data and transmits the packet data to the IP network and converts the packet data from the IP network into voice data. The IP telephone adapter includes the IP telephone adapter. An IP telephone apparatus, wherein the apparatus is the IP telephone adapter apparatus according to any one of claims 1 to 3.   A plurality of IP telephone apparatuses that are connected to an IP network and packetize voice data and transmit the packet data to the IP network, and also include an IP telephone adapter apparatus that converts packet data from the IP network into voice data. Each IP telephone apparatus is connected to a telephone company apparatus that performs a connection process between the IP network and the telephone company apparatus connects the connected IP telephone apparatuses and the connected IP An IP telephone for connecting a telephone device to another IP telephone device and an IP telephone device having a global IP address directly connected to the IP network via another telephone carrier device connected to the IP network The IP telephone device connected to the telephone carrier device. The IP telephone adapter apparatus stores a global IP address of an IP telephone apparatus directly connected to the IP network in a storage unit in association with a dial number of the IP telephone apparatus, and stores the global IP address. When the telephone number stored in the storage means is input to the telephone device of the IP telephone adapter provided with the means, the global IP address stored in the storage means corresponding to the telephone number An IP telephone system characterized by making a connection request.   In the IP telephone system, the telephone number and the global IP address of the IP telephone apparatus directly connected to the IP network stored in the storage means are the telephone number and global IP address of the nearest emergency contact. 6. The IP telephone system according to claim 5, wherein the IP telephone system is provided. In the IP telephone system, the telephone number and the global IP address of an IP telephone apparatus directly connected to the IP network are transmitted from the telephone business apparatus to the IP telephone apparatus belonging to the telephone business apparatus. 6. The IP adapter apparatus of the apparatus automatically registers the telephone number and the global IP address of the IP telephone apparatus directly connected to the transmitted IP network in the storage means. The IP telephone system according to claim 6.

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