AU4801399A

AU4801399A - Adapter device and network system

Info

Publication number: AU4801399A
Application number: AU48013/99A
Authority: AU
Inventors: Takeshi Ito; Eiji Kawai; Masaharu Yoshimori
Original assignee: Sony Computer Entertainment Inc
Current assignee: Sony Interactive Entertainment Inc
Priority date: 1998-07-27
Filing date: 1999-07-26
Publication date: 2000-02-21
Also published as: DE19935026A1; EP1025689A1; GB2340697A; NZ503528A; WO2000007351A8; CN1248828A; JP2000049960A; RU2000107842A; FR2781633B1; GB9917421D0; WO2000007351A1; KR20010015632A; FR2781633A1; TW425806B; BR9902997A; CA2304161A1

Description

WO 00/07351 PCT/JP99/03996 ADAPTER DEVICE AND NETWORK SYSTEM Technical Field The present invention relates to an adapter device for 5 transmitting an analog signal outputted from an electronic device to a network, and a network system incorporating such an adapter device. Background Art 10 Console-type CPU systems including personal computers for home use, TV game machines, and set-top boxes, which are available in recent years, can be used while in communica tion with remote locations via telephone lines. It is the general practice to connect such a console to 15 a network such as the Internet or the like with a cable via an analog telephone line or a digital communication network. For example, the console is connected by a modular cable to an indoor modular jack that is connected to a network. Recently, mobile telephone services including portable 20 telephone and PHS (Personal Handyphone system) as radio telephone have been in widespread use. When the above con sole is connected to a radio telephone set, the console can be connected to a network such as the Internet or the like. In this case, the console is connected directly to the net 25 work via the radio telephone set with an adapter such as a dedicated modem, a connection adapter, or the like. Adap ters for use between radio telephone sets and consoles in clude an adapter that incorporates a mobile telephone func- WO 00/07351 PCT/JP99/03996 -2 tion, as well as the dedicated modem and the connection adapter. These adapters are usually available as options. Heretofore, connecting a console to a network has posed the following problems: 5 Since the console needs to be installed and used near the modular jack, the console suffers a limitation on its location. It is tedious and time-consuming to connect the console to the modular jack because a modular cable is required to 10 interconnect the console and the modular jack. A TV game machine or a set-top box is normally used in a certain fixed position, e.g., it is connected to a televi sion set in a living room. Therefore, a modular jack needs to be installed near a TV game machine or a set-top box. 15 Portable telephone or PHS suffers other problems in that it covers limited geographical regions only, cannot pick up sufficiently strong radio waves in general residen tial areas other than municipal areas and outdoor environ ments, and cannot be used within buildings and condominiums. 20 The above problems have presented an obstacle to users' efforts to connect consoles for home use to public networks. Because of this obstacle, applications which use networks have been prevented from becoming widely used. It is therefore an object of the present invention to 25 provide an adapter device which is capable of promoting the use of networks and making the use of a console valuable, and a network system incorporating such an adapter device.

WO 00/07351 PCT/JP99/03996 -3 Disclosure of Invention The adapter device according to the present invention is capable of transmitting an analog signal representative of information from the console, which has been processed by 5 the transmission signal processing means, to the first tele phone set, and the first telephone set can output the infor mation from the console, which is obtained on the basis of the received analog signal, to the public telephone line. Therefore, the adapter device can utilize an existing analog 10 communication system which has generally been in widespread use, making use of the communication system valuable. The adapter device allows the console to be connected to the public telephone line regardless of where the modular jack is positioned, without concern over any cables, insofar 15 as the console is located at home. The adapter device can be manufactured with ease. In the network system according to the present inven tion, an adapter means can transmit an analog signal repre sentative of information from the console, which has been 20 processed by the transmission signal processing means of the adapter means, to the first telephone set, and the first telephone set can output the information from the console, which is obtained on the basis of the received analog sig nal, to the public telephone line. Therefore, the network 25 system can utilize an existing analog communication system which has generally been in widespread use, making use of the communication system valuable. Furthermore, the network system allows the console to WO 00/07351 PCT/JP99/03996 -4 be connected to the public telephone line regardless of 4 where the modular jack is positioned, without concern over any cables, insofar as the console is located at home. The adapter means can be manufactured with ease. 5 In the adapter device according to the present inven tion, a transmitting means can transmit an analog signal representative of information from the console, which has been processed by the transmission signal processing means, to the receiving means, and the receiving means can output 10 the information from the console, which is obtained on the basis of the received analog signal, to the public telephone line. Furthermore, the adapter device allows the console to be connected to the public telephone line regardless of 15 where the modular jack is positioned, without concern over any cables, insofar as the console is located at home. The adapter device can be manufactured with ease. Although certain preferred embodiments of the present invention have been shown and described in detail, it should 20 be understood that various changes and modifications may be made therein without departing from the scope of the append ed claims. The above and other objects, features, and advantages of the present invention will become more apparent from the 25 following description when taken in conjunction with the ac companying drawings in which preferred embodiments of the present invention are shown by way of example.

WO 00/07351 PCT/JP99/039 9 6 -5 Brief Description of Drawings FIG. 1 is a block diagram of a network system according to the present invention, showing the manner in which sig nals are sent and received between a master device and an 5 adapter device; FIG. 2 is a block diagram of an analog cordless tele phone system constructed on the basis of the network system shown in FIG. 1; FIG. 3 is a block diagram of a video entertainment sys 10 tem as a console connected to the adapter device and a mas ter device, constructed on the basis of the network system shown in FIG. 1; FIG. 4 is a perspective view of the video entertainment system and the master device shown in FIG. 3; 15 FIGS. 5 and 6 are a flowchart of a processing sequence of the network system; and FIG. 7 is a perspective view of a video entertainment system as a console and an adapter device which is shaped to match the video entertainment system. 20 Best Mode for Carrying Out the Invention As shown in FIG. 1, a network system 1 according to the present invention comprises a first telephone set (master device) 2 connected to a public telephone line (public tele 25 phone network) 11 by a cable, for transmitting and receiving a radio analog signal representing desired information to and from a second telephone set (slave device) 21 (see FIG. 2) with transmitting/receiving means 13, 14, 15, a console 3 WO 00/07351 PCT/JP99/039 96 -6 having a control means, and an adapter device 4 electrically connected to the console 3. The components of the network system 1 will be de scribed in detail below. 5 The first telephone set 2 is connected to the public telephone network 11 by a cable with a modular jack or the like, and serves as the master device. The second telephone set 21 is capable of transmitting and receiving desired in formation as a radio signal to and from the master device 2, 10 and serves as the slave device. The master device 2 comprises an NCU (Network Control Unit) 12, a transmitter 13, an antenna 14, a receiver 15, a microcomputer 16, and a ROM (Read-Only Memory) 17. The transmitter 13, the antenna 14, and the receiver 15 jointly 15 make up a transmitting/receiving means. The NCU 12 serves as a controller for connection to the public telephone line 11, and controls signals as they are inputted from and outputted to the public telephone line 11. The transmitter 13 processes a signal which has been 20 inputted from a remote party through the NCU 12. The trans mitter 13 has a high-frequency transmission circuit, and modulates a signal from a sender according to an analog modulating process. The antenna 14 transmits and receives a radio signal to 25 and from the adapter device 4 or the slave device 21. For example, the antenna 14 transmits a signal processed by the transmitter 13 to the adapter device 4 or the slave device 21, and receives a signal transmitted from the adapter de- WO 00/07351 PCT/JP99/0399 6 -7 vice 4 or the slave device 21. The receiver 15 processes a signal received by the an tenna 14, i.e., a signal transmitted from the adapter device 4 or the slave device 21. 5 The receiver 15 has a high-frequency reception circuit, and demodulates a signal received by the antenna 14. For example, the receiver 15 receives a modulated signal repre senting information from the console 3 via an antenna 43 of the adapter device 4 and the antenna 14 of the master device 10 2, and demodulates the received signal to obtain the infor mation. The signal (information) processed by the receiver 15 is outputted by the NCU 12 to the public telephone line 11. The microcomputer 16 serves to control the components 15 of the master device 2, i.e., the NCU 12, the transmitter 13, and the receiver 15. The ROM 17 serves as a memory means for storing various items of information. For example, the ROM 17 stores pro grams for the microcomputer 16. The ROM 17 also stores a 20 slave device ID (identification) for identifying the slave device 21 which is the second telephone set 21. Specifi cally, the slave device ID is used for the master device 2 to check the slave device 21 that has sent a communication request to the master device 2. 25 The master device 2 of the above structure is able to transmit and receive analog signals to and from the salve device 21 and also to and from the adapter device 4 via wireless links.

WO 00/07351 PCT/JP99/03996 -8 The master device 2 is constructed as the master device of an analog cordless telephone system for home use or a de vice equivalent thereto. Only the microcomputer 16 and the ROM 17 are in the form of digital circuits, whereas the oth 5 er components of the master device 2 are in the form of analog circuits. The master device 2 and the slave device 21 transmit and receive analog signals of information therebetween ac cording to a given protocol. The adapter device 4 has a 10 plurality of protocols, and transmits and receives signals to and from the master device 2 according to a selected one of those protocols which matches the master device 2. Be cause the adapter device 4 has the plural protocols, it is not limited to use with the master device 2, but is compati 15 ble with a plurality of master devices having different pro tocols. The slave device 21 which is the second telephone set 21 is constructed as shown in FIG. 2, for example. As shown in FIG. 2, the slave device 21 comprises a key pad (operat 20 ing part) 22, a microphone 23, a speaker 24, a display unit 25, a battery 26, a CPU 27, a transmission/reception signal processor 28, and an antenna 29. The key pad 22, which the user manually operates to en ter various control signals, has buttons "0" through "9", 25 " *", " #" as ten keys. When the key pad 22 is operated by the user, the CPU 27 controls various components of the slave device 21 according to control signals entered by the user via the key pad 22.

WO 00/07351 PCT/JP99/03996 -9 The microphone 23 detects a speech signal from the user. A speech signal detected by the microphone 23 is processed, e.g., modulated in an analog fashion, and then transmitted to the master device 2. 5 The speaker 24 outputs a speech signal. Specifically, the speaker 24 outputs a speech signal which has been input ted by a calling or called party to which the slave device 21 has been connected, and transmitted from the public tele phone line 11 via the master device 2. 10 The display unit 25 serves to display various items of information. For example, the display unit 25 displays items of information depending on control signals entered by the user via the key pad 22, e.g., a telephone number. The battery 26 supplies electric energy to the slave 15 device 21. The transmission/reception signal processor 28 proc esses signals to be transmitted to the master device 2 via the antenna 29, and also processes signals received from the master device 2 via the antenna 29. The transmis 20 sion/reception signal processor 28 has a high-frequency transmission/reception circuit, and modulates and demodu lates signals in an analog fashion. The CPU 27 serves to control the components of the slave device 21. For example, the CPU 27 controls the com 25 ponents of the slave device 21, e.g., the display unit 25, depending on control signals entered by the user via the key pad 22. The slave device 21 of the above structure is able to WO 00/07351 PCT/JP99/03996 - 10 transmit and receive analog modulated signals to and from the master device 2 according to a given protocol. The master device 2 may be may comprise a power supply 31, a CPU 32, and a transmission/reception signal processor 5 33, as shown in FIG. 2. The transmission/ reception signal processor has the transmitter 13 and the receiver 15 shown in FIG. 1, for example. The master device 2 is generally connected to the public telephone line 11 via a cable with a modular jack 34. 10 The master device 2 and the slave device 21 jointly make up a so-called analog cordless telephone system. The adapter device 4 shown in FIG. 1 is added to and forms part of the analog cordless telephone system thus constructed. The adapter device 4 which allows the master device 2 15 and the console 3 to transmit and receive analog signals representing desired information will be described below. As shown in FIG. 1, the adapter device 4 has an inter face 41 as a connecting means for electrically connecting to the console 3 which has a control means including a CPU 20 (Central Processing Unit), not shown, a transmitter 42 as a transmission signal processing means for processing a signal representative of information inputted from the console 3 via the interface 41, and an antenna 43 as a transmission element for transmitting an analog signal generated by the 25 transmitter 42. The adapter device 4 also has a receiver 44 for proc essing a signal transmitted from the master device 2 and re ceived by the antenna 43, a microcomputer 45 for controlling WO 00/07351 PCT/JP99/03996 - 11 various components of the adapter device 4, and a ROM 46 as a memory means for storing various data. The interface 41 is electrically connected to the con sole 3 and transfers various items of information between 5 the console 3 and the adapter device 4. The transmitter 42 processes a signal from the console 3 and transmits the processed signal via the antenna 43. Specifically, the transmitter 42 has a high-frequency trans mission circuit, and modulates a signal from the console 3 10 according to an analog modulating process, and transmits the modulated signal via the antenna 43. The transmitter 42 may be of substantially the same construction as the transmis sion/reception signal processor 28 of the slave device 21. Consequently, the adapter device 4 may be assembled using 15 the transmission/reception signal processor 28 as the trans mitter 42. The antenna 43 serves to transmit and receive signals to and from the master device 2. The receiver 44 processes a signal received by the an 20 tenna 43 and obtains information from the master device 2 based on the processed signal. The receiver 44 has a high frequency reception circuit, and demodulates a signal re ceived by the antenna 43 and obtains information from the master device 2 based on the demodulated signal. The re 25 ceiver 44 may also be of substantially the same construction as the transmission/reception signal processor 28 of the slave device 21. Thus, the adapter device 4 may be assem bled using the transmission/reception signal processor 28 as WO 00/07351 PCT/JP99/03996 - 12 the receiver 44. The microcomputer 45 serves to control the components of the adapter device 4, i.e., the transmitter 42 and the receiver 44. 5 The ROM 46 serves as a memory means for storing various items of information. For example, the ROM 46 stores pro grams for the microcomputer 45. The adapter device 4 thus constructed processes a sig nal representing desired information which have been gener 10 ated by the console 3, e.g., modulates the signal in an analog fashion, and transmits the processed signal to the master device 2. The master device 2 processes a signal transmitted from the adapter device 4 in the same manner as it processes a 15 signal transmitted from the slave device 21. Specifically, the master device 2 receives a signal transmitted from the adapter device 4 and demodulates the received signal to ob tain information generated in the console 3 based on the signal. The master device 2 outputs the signal from the 20 console 3 to the public telephone line 11 in the same manner as it outputs a signal from the slave device 21. In the adapter device 4 which is capable of transmit ting and receiving signals to and from the master device 2, the microcomputer 45 and the ROM 46 are in the form of digi 25 tal circuits, as with the master device 2. Other components of the adapter device 4 than the microcomputer 45 and the ROM 46 are in the form of analog circuits. The microcom puter 45 may be reduced in scale by giving the console 3 WO 00/07351 PCT/JP99/03996 - 13 most of the functions which the adapter device 4 is to per form. The console 3 comprises a system having a CPU, such as a personal computer for home use, a video game machine (TV 5 game machine) as a video entertainment system, or a set-top box. FIGS. 3 and 4 show the manner in which the adapter de vice 4 allows the console 3 to transmit an analog signal to the master device 2 which is connected by a cable to the 10 public telephone line (public telephone network) 11. The console 3 shown in FIGS. 3 and 4 is a video enter tainment system or video game system, and comprises a many body 52 having a built-in CPU and a controller 53 as a manu al control means. The console 3 is energized by a power 15 supply 54. A display monitor 55 is connected to the main body 52. The console 3 reads a program recorded in a re cording medium such as a CD-ROM (Compact Disk - ROM), not shown, and executes a video game or the like based on the program. The program may also be read into the main body 52 20 of the console 3 from the public telephone line 11 via the master device 2 and the adapter device 4. The display monitor 55 comprises a television set capa ble of receiving general television broadcasts. For this reason, the display monitor 55 is often installed in a liv 25 ing room. The main body 52 serves to process data depending on control signals entered via the controller 53 by the user. The controller 53 comprises various buttons and a WO 00/07351 PCT/JP99/03996 - 14 stick, and sends control signals to the main body 52 when the buttons and the stick are manually operated by the user. The display monitor 55 serves to display video images of data that have been processed by the main body 52. 5 When the controller 53 is manually operated by the user, the console 3 outputs various items of information to the adapter device 4. For example, the user manually oper ates the controller 53 to generate information while viewing video images displayed on the display monitor 55. The gen 10 erated information is transmitted from the console 3 via the adapter device 4 to the master device 2. The adapter device 4 shown in FIG. 3 has a transmis sion/reception signal processor 51 for processing signals transmitted and received between the adapter device 4 and 15 the master device 2. The transmission/reception signal processor 51 comprises the transmitter 42 and the receiver 44 shown in FIG. 1. The network system 1 is constructed as described above. A process of transmitting and receiving data in the network 20 system 1 will be described below with reference to FIGS. 5 and 6. In the process, the slave device 21 requests the master device 2 to establish a telephone circuit. In step S1, the slave device 21 sends a connection re quest to the master device 2. In response to the connection 25 request, the master device 2 checks the slave device ID of the requesting slave device 21 against a slave device ID stored in the ROM 17 of the master device 2 in step S2. The master device 2 checks the slave device ID of the requesting WO 00/07351 PCT/JP99/03996 - 15 slave device 21 in order to decide whether the requesting slave device 21 is permitted to be connected to the master device 2 or not. If the slave device ID of the requesting slave device 5 21 does not agree with the slave device ID in the ROM 17, then the master device 2 does not permit the slave device 21 to be connected to the master device 2 in step S21. If the slave device ID of the requesting slave device 21 agrees with the slave device ID in the ROM 17, then the 10 master device 2 checks whether the circuit of the analog cordless telephone system is busy or not in step S3. The circuit of the analog cordless telephone system is busy when no secure connection has been made between the slave device and the circuit or the circuit is being used by another 15 slave device. If the circuit of the analog cordless telephone system is busy in step S3, then the master device 2 carries out a busy-circuit process in step S31. If the circuit of the analog cordless telephone system is not busy, i.e., can be 20 used, then the master device 2 searches for an idle channel in step S4. Specifically, the master device 2 searches for an idle channel in a frequency band assigned to the analog cordless telephone system. If no idle channel is available in step S4, then the 25 master device 2 carries out a busy-channel process in step S41. If an idle channel is available in step S4, then the master device 2 sets the idle channel as an active channel WO 00/07351 PCT/JP99/03996 - 16 in step S5. The master device 2 can now communicate with the slave device 21 in step S6. In step S7, a telephone number entered in the slave de vice 21 by the user is transmitted to the master device 2. 5 The master device 2 then dials the transmitted telephone number in step S8, and thereafter performs a connection check in step S9. If the dialed telephone number is busy in the connection check, then the master device 2 carries out a busy process in step S91. 10 If the master device 2 is connected to the party of the dialed telephone number in the connection check, then the master device 2 establishes a link with the dialed party via the public telephone line 11 in step S10. Thereafter, information from the console 3 is transmit 15 ted to the master device 2 by the adapter device 4. The in formation from the console 3 is therefore transmitted from the master device 2 to the dialed party via the established link. For example, if the dialed party has a device with a 20 display unit, then the information from the console 3 is displayed on the display unit. For stopping the communication, the slave device 21 sends a disconnection request to the master device 2 in step S12, and the link is disconnected in response to the discon 25 nection request in step S13. The network system 1 incorporating the adapter device 4 has been described above. With the adapter device 4 added to the analog cordless WO 00/07351 PCT/JP99/03996 - 17 telephone system, the network system 1 provides a communica tion system for communication with the console 3. There fore, if the adapter device 4 is added to an existing analog cordless telephone system, then there is provided a communi 5 cation system for communication with the console 3. A sys tem including the console 3 can easily be constructed becau se an existing infrastructure is employed. The network system 1 allows the console 3 to be con nected to the public telephone line 11 through the adapter 10 device 4 and the master device 2 regardless of where the modular jack 34 is positioned, without concern over any ca bles, insofar as the console 3 is located at home. The components of the adapter device 4, other than the microcomputer 45 and the ROM 46, are in the form of analog 15 circuits, and the microcomputer 45 may be reduced in scale as most of the functions thereof can be performed by the console 3. Therefore, the adapter device 4 can be con structed as a simple analog circuit, and does not require a complex control circuit and an error-correcting circuit 20 which may be found in digital cordless telephone systems. As a result, the adapter device 4 makes it possible to provide an inexpensive communication system. For the reasons described above, the network system 1 allows a network to be constructed at a low cost as it re 25 quires no modem. The network system 1 will easily find widespread use in view of the fact that the public telephone line 11 has already been widely used. The adapter device 4 can easily be manufactured because it can be made of exist- WO 00/07351 PCT/JP99/03996 - 18 ing units and components that are already present in large quantities. Even if the user does not have an analog cordless tele phone set, i.e., even if the user does not have the master 5 device 2, the user can construct a communication system con nected to the console 3 by using a reception adapter device connected to the public telephone line 11. Specifically, a reception adapter device for receiving a signal from the adapter device 4 is provided, and the re 10 ception adapter device comprises a reception element for re ceiving the signal from the adapter device 4 via a wireless link, a reception signal processing means for processing an analog signal received by the receiver to obtain information from the console 3, and a connecting means connected to the 15 public telephone line 11 for outputting the information, ob tained by the reception signal processing means, from the console 3 to the public telephone line 11. The reception element comprises an antenna, for exam ple. The reception signal processing means comprises the 20 transmission/reception signal processor 33 of the master de vice 2 shown in FIG. 2, for example. The connecting means comprises the NCU 12 of the master device 2 shown in FIG. 1, for example. Specifically, the reception adapter device may be iden 25 tical in structure to a receiving means, provided in the master device 2 connected to the public telephone line 11, for transmitting and receiving an analog signal representa tive of information to and from the slave device 21 via a WO 00/07351 PCT/JP99/03996 - 19 wireless link. In the above modification, the reception adapter and the adapter device 4 transfer analog signals from the con sole 3 according to a single protocol. 5 Accordingly, it is possible to transfer information from the console 3 to the public telephone line 11 without using the master device 2. A communication network can ea sily and inexpensively be constructed by using the receiver of the existing master device 2 as the reception adapter de 10 vice. The adapter device 4 may be shaped to match the console 3. For example, if the adapter device 4 is incorporated in the video entertainment system shown in FIG. 4, then, as shown in FIG. 7, the adapter device 4 may be constructed 15 such that it can be mounted on the back of the main body 52 of the video entertainment system in a substantially unitary configuration. Since the adapter device 4 is mounted on the back of the main body 52, the user no longer pays attention to the fact that the adapter device 4 is mounted on the main 20 body 52, and can feel that the console 3, by itself, trans mits information via the master device 2 to the public tele phone line 11.

Claims

1. An adapter device comprising: connecting means (41) for electrically connecting to a 5 console (3) having control means; transmission signal processing means (42) for processing a signal representative of information from the console which has been entered via said connecting means; a transmission element (43) for transmitting an analog 10 signal generated by said transmission signal processing means, wherein said adapter device establishes a wireless link with a first telephone set (2) connected by a cable to a pub lic telephone line (11) and having transmitting/receiving 15 means (13, 14, 15) (33) for transmitting and receiving the analog signal to and from a second telephone set (21) via a wireless link, the arrangement being such that the informa tion from the console is transmitted as an analog signal from said transmission element (43) to said transmitting/receiving 20 means (13, 14, 15) (33).

2. An adapter device according to claim 1, wherein said console comprises a video entertainment system (52, 53). 25

3. An adapter device according to claim 1, wherein said transmitting/receiving means includes receiving means (14, 15) comprising a reception element (14) for receiving the analog signal from said transmission element (43) via a WO 00/07351 PCT/JP99/03996 - 21 wireless link, and signal processing means (15) for process ing the analog signal received by said reception element.

4. An adapter device according to claim 1, having a 5 plurality of protocols, wherein one of said protocols which matches said first telephone set (2) is selected, and said analog signal is transmitted to said first telephone set (2) according to the selected one of the protocols. 10

5. An adapter device according to claim 1, wherein said first telephone set and said second telephone set comprise a master device and a slave device, respectively, of an analog cordless telephone system. 15

6. A network system comprising: a first telephone set (2) connected by a cable to a public telephone line (11) and having transmitting/receiving means (13, 14, 15) (33) for transmitting and receiving an analog signal representative of information to and from a 20 second telephone set (21) via a wireless link; a console (3) having control means; and adapter means (4) having connecting means (41) for electrically connecting to said console, transmission signal processing means (42) for processing a signal representative 25 of information from the console which has been entered via said connecting means, and a transmission element (43) for transmitting an analog signal generated by said transmission signal processing means. WO 00/07351 PCT/JP99/03996 - 22 14

7. A network system according to claim 6, wherein said console comprises a video entertainment system. 5

8. A network system according to claim 6, wherein said transmitting/receiving means includes receiving means (14, 15) comprising a reception element (14) for receiving the analog signal from said transmission element (43) via a wireless link, and signal processing means (15) for process 10 ing the analog signal received by said reception element.

9. A network system according to claim 6, wherein said adapter means (4) has a plurality of protocols, and wherein one of said protocols which matches said first telephone set 15 (2) is selected, and said analog signal is transmitted to said first telephone set (2) according to the selected one of the protocols.

10. A network system according to claim 6, wherein said 20 first telephone set and said second telephone set comprise a master device and a slave device, respectively, of an analog cordless telephone system.

11. A reception adapter device comprising: 25 receiving means connected by a cable to a public tele phone line (11), wherein said receiving means further com prises a reception element for receiving an analog signal via a wireless link, reception signal processing means for proc- WO 00/07351 PCT/JP99/03996 - 23 essing the analog signal received by said reception element, and connecting means connected to said public telephone line (11), for outputting the information which has been obtained by said reception signal processing means to said public 5 telephone line (11), wherein said receiving means establishes a wireless link for receiving an analog signal from a transmitting means (42, 43) for transmitting information from a console (3) having control means, wherein said transmitting means (42, 43) 10 further comprises connecting means (41) for electrically con necting to said console, transmission signal processing means (42) for processing a signal representative of information from said console which has been entered via said connecting means, and a transmission element (43) for transmitting an 15 analog signal generated by said transmission signal process ing means, and wherein said reception element receives the analog sig nal from said transmission element via said wireless link, said reception signal processing means processes the analog 20 signal to obtain the information from said console, and said connecting means outputs the information from the console.

12. A reception adapter device according to claim 11, wherein said receiving means is structurally identical to 25 receiving means (14, 15) of a first telephone set (2) con nected by a cable to said public telephone line (11), for transmitting and receiving an analog signal representative of information to and from a second telephone set (21) via a WO 00/07351 PCT/JP99/03996 - 24 wireless link.

13. A reception adapter device according to claim 12, wherein said console comprises a video entertainment system. 5

14. A reception adapter device according to claim 12, wherein said transmitting means (42, 43) and said receiving means transmit and receive analog signals according to a single protocol. 10

15. A reception adapter device according to claim 12, wherein said first telephone set and said second telephone set comprise a master device and a slave device, respec tively, of an analog cordless telephone system.