Abstract:
A cordless telephone system comprises a base unit which cam accept information services for stationary telephone sets, and which can transmit and receive various signals by way of networks, and a wireless handset which wirelessly communicates with the base unit in two-ways, wherein the wireless handset can accept information services for stationary telephone sets in pair with the unit. With this arrangement, information obtained from the information services for stationary telephone sets can be seen even at a position remote from the base unit.

Description:
FIELD OF THE INVENTION 
   The present invention relates to a cordless telephone system incorporating a base unit set and an wireless handset, and in particular to a cordless telephone system which can accept external information service. 
   BACKGROUND OF THE INVENTION 
   These years, mobile telephones which can accept information services from various companies have rapidly been widespreadly used, and as a result, stationary telephone sets which can accept the information services have been also developed. It is noted that the information services include services for connection to information sites in which several many information menus have been prepared, or services for connection to information sites on internets. 
   Explanation will be hereinbelow made of a method of connection of a stationary (desk-top and wire type) telephone set which can accept information services, with an information site. 
     FIG. 10  is a schematic view for explaining a method of connection of a conventional telephone set to an information site, and  FIG. 11  is a block diagram illustrating a configuration of the conventional telephone set. 
   As shown in  FIG. 10 , when the user uses an information service, the user calls the information service center  3  from the telephone set  1  by way of a telephone exchange station  2 . It is noted that the information service center  3  and an information service provider  4  side are connected with each other through an exclusive network or an internet, and further, information provided by the information service  4  side are prepared on the information service center in the form of several information menus. 
   If the information menus provided by the information service provider  4  can be obtained by connecting the telephone set  1  with the service center through the exclusive network in such a case that the information service provider  4  is connected with the information service center  3  or through the internet in such a case that the information service provide  4  is connected with the service center  3  through the internet. That is, in the case of using the internet, the information service center  3  has a role of a sole provider for information services. Further, the information service center  3  is a base station for carrying out the above-mentioned services. 
   Incidentally, as to the so-called “i-mode” which is in popular at present, and which is a Trade Mark of an NTT Docomo Co., an i-mode center for i-mode services is one of the information service centers. The information service center  3  is connected to an information service provider  4  through an exclusive network, or is connected to an information service provider  4  on internets with the use of the internets. That is, the information service provider  3  has a role of a telephone exchange station for connecting an information service center  3  with the telephone set  1 . 
   Further, as shown in  FIG. 11 , the telephone set  1  has a display part  5  having its screen on which image information from the information service center is displayed. 
   SUMMARY OF THE INVENTION 
   An object of the present invention is to provide a cordless telephone system which can receive an information service obtained on a stationary (desk-top and wire type) telephone set as a base unit, with an wireless handset at a position remote from the stationary telephone set. 
   It is noted that the wireless handset such as a cordless phone, a PHS or a mobile phone can carry out wireless-communication with the base unit. 
   According to the present invention, there is provided a cordless telephone system comprising a base unit which can accept information services for a stationary telephone set, and which is adapted to receive and transmit various signals through networks, and an wireless handset which carries out wireless communication with the base unit in two-ways, wherein the base unit and the wireless handset can cope in pair with information services for the stationary telephone set. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a block diagram illustrating a structure of a base unit in a cordless telephone system in an embodiment of the present invention; 
       FIG. 2  is a schematic view for explaining a method of connection of the base unit to an information side in the embodiment of the present invention; 
       FIG. 3  is a view illustrating a display screen in a display part of the base unit in the cordless telephone system in the embodiment of the present invention; 
       FIG. 4  is a view illustrating the display screen in the display part of the base unit in the cordless telephone system in the embodiment of the present invention; 
       FIG. 5  is a block diagram illustrating a structure of an wireless handset in the cordless telephone system in the embodiment of the present invention; 
       FIG. 6  is a schematic view for explaining a method of connection to an information site from an wireless handset in the cordless telephone system in the embodiment of the present invention; 
       FIG. 7  is a view illustrating a display screen in a display part of the wireless handset in the embodiment of the present invention; 
       FIG. 8  is a view illustrating the display screen in the display part of the wireless handset in the embodiment of the present invention; 
       FIG. 9  is a view illustrating a title list which is displayed on the display part of the wireless handset in the embodiment of the present invention; 
       FIG. 10  is a schematic view for explaining a method of connection to an information site in a conventional telephone system; and 
       FIG. 11  is a block diagram illustrating a configuration of the conventional telephone system. 
   

   DESCRIPTION OF THE PREFERRED EMBODIMENT 
   The present invention will be hereinbelow detained in an embodiment form of the present invention. 
   Referring to  FIG. 1  which is a block diagram illustrating a configuration of a base unit in a cordless telephone system  10  in an embodiment of the present invention, the cordless telephone system  10  has the base unit  11  connected to networks and at least one wireless handset  12  which can be wireless-communicated with the base unit in two-ways within a predetermined extent (100 to 150 m). It will be hereinbelow explained that the wireless handset  12  in the cordless telephone system  10  shown in  FIG. 1  is a PHS telephone as a premise. However, the present invention should not be limited to this configuration but can be applied to such a configuration that the wireless handset is a mobile telephone. 
   (Configuration of the Main Phone) 
   Referring to  FIG. 1 , the base unit  11  transmits and receives voice signals to and from an external telephone under control of a control part  13 , and carries out wireless-communication with the wireless handset in two-ways by way of a wireless transmitting part  14  and a wireless receiving part  15  for the wireless communication. This control part  13  has a CPU, a ROM and the like, and has a role of controlling the base unit in its entirety. 
   Further, since the base unit  11  incorporates a receiver  16  connected thereto with a cord, the cordless communication (indoor communication) can be made with the wireless handset  12  or communication can be made with an external telephone through a network (outside communication) when the base unit is hooked off by picking up the receiver  16 . Further, since the base unit  11  incorporates a speaker phone communication part  17 , the communication can be made in a hands-free manner when a switch (which is not shown) for the speaker phone communication part  17  is turned on so as to hook off the base unit  11 . 
   Further, since the base unit  11  incorporates an answering machine part  18 , if the base unit  11  or the wireless handset  12  is not hooked off even though a call enters from the networks, the answering machine part  18  is energized so as to record a message which has entered. In this case, if the base unit is not hooked off even after a call bell is rung at a predetermined number (for example, 6) of times, the control part  13  is capable of changing over a change-over switch  19  from a communication circuit part  20  into the answering machine part  18 . 
   Further, the base unit  11  has a facsimile function part  22 , and accordingly, when the control part  13  receives a CNC signal as a switch for starting facsimile communication, the control part  13  changes over the change-over switch  19  from the communication circuit part  20  into the facsimile function part  21  in order to carry out facsimile communication. 
   Further, since the content of a received facsimile is displayed on a display part  22 , if the facsimile is sufficient at one glance without the necessity of printing, a printer part  24  in the facsimile function part  21  is not operated, but if it should be printed, an operating part  23  is manipulated so as to operate the printer part  24  for printing thereof. 
   Further, the base unit  11  in this embodiment has three kinds of memory. A first memory stores a telephone directory having abbreviated telephone numbers, and accordingly, when the user inputs an abbreviated telephone number into the base unit or the wireless handset with which the user starts calling, the user can call a conversation partner by means of a telephone number corresponding to the abbreviated telephone number stored in the first memory. Further, a second memory is a temporary memory for displaying an information received by the base unit through a network, on the display part  22  in the base unit, and a third memory can be stored therein with a received information under instructions from the operating part on the base unit or the wireless handset as detailed later, and further, can be stored therein with an image read by a scanner (which is not shown). Referring to  FIG. 1 , the first memory and the third memory are included in a memory part  26  while the second memory is included in a display second memory part  27 . 
   Further, the base unit  11  is capable of transmitting an information stored in the display memory part  27 , to the wireless handset after the information is compressed by the compression part  28  when it is wireless-transmitted to the wireless handset. 
   By the way, the cordless telephone system  10  has an interface part  25  with which an external equipment can be used. This interface part  25  may be the one which can carry out infrared communication in a wireless manner or which uses a communication cable. The external equipment capable for being connected to the interface part  25  is, for example, a laser printer or the like which enables high quality printing, or a facsimile device such as a laser facsimile device or the like. 
   However, in the case of connection of the facsimile device as the external equipment to the interface part  25 , a facsimile simulating adapter incorporating a pseudo-bell generating circuit, a running current generating circuit or the like is required since the facsimile device as the external equipment is used with such simulation that the facsimile device receives facsimile data. 
   (Service Connection from the Base Unit) 
   Next, explanation will be made of a method of connection to an information site given by an information service provider through the manipulation of the base unit in the cordless telephone system in this embodiment. 
   Although the method of connection thereof is substantially similar to that of the prior art shown in  FIG. 10 , some explanation thereto will be added more or less. 
   As shown in  FIG. 2 , when the user is to use an information service for stationary telephone sets, as shown in  FIG. 2 , at first calling is made to an information service center  3  from the base unit  11  by way of a telephone exchange station  2 . 
   As shown in  FIG. 2 , the information service center  3  is connected to the information service provider  4  through the intermediary of an exclusive network or the internet, and several menus of information provided by the information service provider  4  have been set on the information service center  3 . As shown in  FIG. 3 , when a first item “News/Information” in the list of menu is selected, the image on the screen is changed over into an image having several information menus relating to the news and the information as shown in  FIG. 4 . These information menus are grouped into a no charge group and a charge group. However, irrespective of whether an item to be used by the user in the list is charged or not, the user can open the information menu by registering the item in the list to the cordless telephone system  10 . As mentioned above, when a first item “S newspaper” in the information menu is selected, the information menu is transmitted through the intermediary of the exclusive network if the information service center  3  is connected to the information service provider  4  by way of the exclusive network or through the intermediary of the internet if the information service center  3  is connected to the information service provider  4  by way of the internet. It is noted here that if the internet is used, the information service center  3  has a role of a sole provider in the information service. 
   Since there is used such a charge system that as a charge information menu is registered, a registry fee corresponding to the registered information menu is charged to the user, it is required to maintain a certain number of information menus to be registered in order to avoid wasting money. 
   Further, among these menus, those which allows transactions with a bank are present, and accordingly, in the case of transactions with a bank, a personal identification number (usually having four digits) which has been registered in the bank should be inputted, otherwise it cannot be used. The information service center  3  is connected through an exclusive network to such an information service provider  4  having confidentiality, and accordingly, other than specified persons which have been registered in the information service center  3  can never use the information. 
   As mentioned above, when the user connects the cordless telephone system to the information site produced by the information service provider  4  by way of the information service center  3 , the information from the connected information site is displayed on the display part  22  of the base unit  11  on the user&#39;s side. 
   Further, if it is sufficient to read the information displayed on the display part  22  at one glance, no printing is made, but if it is required to be printed for recording, the print part  24  in the facsimile function part  21  functions when the operating part  23  is manipulated, and accordingly, the image information displayed at present on the display part  22  is stored in the memory  26 , and is printed by the printing part  24  (as will be detailed later). Further, if high quality printing is desired, an external equipment such as a laser printer or a laser facsimile machine is connected to the interface part  25  (through the intermediary of an adapter as necessary), thereby it is possible to print various information received by the base unit  11  with high quality. 
   Further, in this embodiment, designated one of various image information stored in the memory, which is designated and displayed on the display part  22  can be sent to the external facsimile machine by designating a telephone partner with the use of an abbreviated telephone number (as will be explained later). 
   (Service Connection from the Wireless Handset) 
   Explanation has been hereinabove made of the method of connection to an information site through the manipulation of the base unit  1 . In this embodiment in which the wireless handset  12  can accept the information service for stationary telephone sets through the intermediary of the base unit  11 , the wireless handset  12  can be connected with an information site when it is manipulated. 
   Explanation will be hereinbelow made of a method of connection of the wireless handset  12  to an information site through the manipulation of the wireless handset  12 . Further, as shown in  FIG. 6 , in the case of using an information site for stationary information telephone sets with the use of the wireless handset  12  by the user, at first wireless communication is made from the wireless handset  12  to the base unit  11  so as to call the information service center  3  from the base unit  11  by way of the telephone exchange station  2 . Since the information servie center  3  and the information service provider  4  are connected together through an exclusive network or the internet therebetween, the information service center  3  connects this call to the information service provider  4  where an information site to be connected by the user is provided. 
   Further, an information menu with which the user has been registered from the base unit side, is also automatically registered for the wireless handset side, and accordingly, it is not required for the user to reregister again as to one and the same information menu from the wireless handset side. 
   (Configuration of the Wireless Handset) 
   Next, explanation will be made of the configuration of the wireless handset. 
   Referring to  FIG. 5 , the wireless handset  12  carries out wireless communication in two ways with the base unit  11  by way of the cordless communication part  32  under the control of the control part  31 . The control part  31  has a CPU, a RAM, a ROM and the like, and controls in general the wireless handset unit  12 . 
   Since the wireless handset  12  incorporates a communication part  33 , it can make communication, similar to the receiver  16  of the base unit  11 , and an operating part  34  can effect a function similar to that the operating part  23  of the base unit  11 . It is noted that a display part  35  of the wireless handset ensures an area sufficient for displaying necessary information although this area smaller than that of the display part  22  in the base unit. Further, among voice signals, information signals and instruction signals and the like from the cordless communication part  32 , the information signal is once stored in a display memory  36 , and is then displayed on the display part  35 . 
   In details, at first, the base unit acquires available information by way of a network by means of its communicating function so that the acquired information is once stored in the display memory  27  in the base unit, and then starts displaying the information on the display part  22 . Further, signals of the information displayed on the display part  22  in the base unit  11  are compressed by the compression part  28 , and thereafter, are transmitted to the wireless handset  12  by way of the wireless transmission part. Accordingly, the cordless communication part  23  in the wireless handset  12  receives the information signals and displays the same on the display part  35  by way of the display memory part  36 . 
   Further, since this wireless handset  12  has an abbreviated telephone number memory, when an abbreviated number is inputted from the wireless handset  12  through the intermediary of the wireless handset  12 , the base unit can call a telephone set on the receiving side having a telephone number corresponding to the abbreviated telephone number. 
   Moreover, although this wireless handset  12  may merely be the one which has a normal function of cordless communication with the base unit  11 , if the wireless handset  11  has a PHS function, the wireless handset  12  can solely communicate with a telephone partner even at a position out of a possible communication range with respect to the base unit  11 . Further, the wireless handset  12  may have a function of a mobile telephone which is complicated more or less. 
   It is noted here that the information service for mobile telephones in this embodiment, is such an information service for equipment having a PHS function or a mobile telephone function in the wireless handset. Accordingly, if the wireless handset  12  can accept the information service for the mobile telephone function, the wireless handset  12  can be connected to an information site by manipulating the wireless handset  12  even at an outside location. 
   Explanation will be made of the printing function and the forwarding function which can be effected by manipulating the operating part  34  in the wireless handset. 
   (Printing by Way of Instructions from the Wireless Handset) 
   Here estimating that information obtained from a connected information site is displayed on the display part  35  of the wireless handset  12 , the information is merely displayed on the display part  35  if it is satisfactory to glance the information displayed on the display part  35 , but the information can be printed for recording by manipulating the operating part  34  so as to operate the printing part  24  in the facsimile function part  21  of the base unit  11  (as will be detailed later). However, it is possible to carry out the printing on the base unit  11  side under such a condition that the base unit  11  and the wireless handset  12  are located within a range of possible wireless communication. 
   Explanation will be hereinbelow made of the function of instructing for printing by way of the wireless handset  12 . 
   When the user selects “S newspaper” in an image displayed on the display part  35  of the wireless handset  11 , as shown in  FIG. 4 , so as to send an instruction for displaying an article on the newspaper, an instruction signal produced by the control part  31  is transmitted to the base unit  11  by way of the cordless communication part  32 , and is then delivered to the control part  13  of the base unit  11  by way of the wireless receiving part  15  in the base unit  11 . Thus, the control part  13  transmits a demand signal corresponding to the instruction signal to an external information service center by way of a network, and as a result, the article on the S newspaper is transmitted to the base unit from the information service center by way of the network, and the display information as to the article of the newspaper is then sent from the center to the base unit  11 , and then to the display part  22  by way of the display memory  27  so as to be displayed on the display part  22 . Simultaneously, an information signal as to the article is compressed by the compression part  28  in the base unit, and is then transmitted to the cordless communication part  23  in the wireless handset by way of the wireless transmitting part  14 . Accordingly, the information signal is displayed on the display part  35  by way of the memory part  36 . 
   Next, the user manipulates the operating part of the wireless handset  12  so as to instruct storing the article of the newspaper, and accordingly, a storing instruction signal produced by the control part  31  in the wireless handset  12  is transmitted to the wireless receiving part  15  in the base unit  11  by way of the cordless communication part  32  in the wireless handset  12 . Thus, the control part  13  in the base unit  11  stores the display information which has been stored in the display memory  27  of the base unit  11  and which is before the compression thereof, corresponding to the information displayed on the display part  35  of the wireless handset  12 , in the memory part  26  in the base unit  11 . 
   Further, as to the display information which has been stored the control part  13  in the base unit also stores a menu name from the wireless receiving part  15 , a title on display from the display memory  27 , and a time obtained from a timer in the control part itself or the present time as a tile for the information, corresponding to the information in the memory part  26  by the instruction from the wireless handset, in response to a storing signal produced from the control part  31  in the wireless handset. Further, as shown in  FIG. 9 , this tile is displayed in the form of a list on the screen of the display part (as will be detailed later) 
   Next, when the user manipulates the operating part  34  of the wireless handset  12 , it is possible to instruct printing the stored information to the printer part in the base unit. 
   That is, after the user select one of titles in the title list displayed on the display part of the wireless handset, when the user manipulates the operating part for displaying the information thereof, the display instruction signal produced by the control part  31  in response to an instruction from the operating part  34  of the wireless handset  11 , is transmitted to the base unit  11  by way of the cordless communication part  32 . Then, the wireless receiving part  15  of the base unit  11  receives the display instruction signal, and the control part  13  in the wireless handset retrieves one of information stored in the memory  26 , which corresponds to the above-mentioned title, and delivers the information in the display memory part  27  for displaying the same on the display part  22  of the base unit  11  while the information is delivered to the wireless transmitting part  14  which delivers the information to the wireless handset  23 . This information is received by the cordless communication part  32  in the wireless handset  12 , and accordingly, the control part  31  stores the same in the display memory part  36  for displaying the information on the display part  35 . 
   Next, a printing instruction is delivered, a printing instruction signal produced from the control part  31  under an instruction from the operating part  34  in the wireless handset  12  is transmitted to the base unit  11  by way of the cordless communication part  32 . Then, the wireless receiving part  15  on the base unit receives the printing instruction signal, and accordingly, the control part  13  in the base unit  11  retrieves one of the information stored in the memory  26 , corresponding to the above-mentioned title, and transmits the same to the printing part  24  which therefore prints the information. 
   (Forwarding of Information from the Wireless Handset) 
   Next, explanation will be made of the information forwarding function of the wireless handset  11 . 
   That is, after the user displays an image of a title list corresponding to an image stored in the memory part  26  in the base unit, on the screen of the display part  22 , when the user selects one information from the list, an information selecting signal produced from the control part  31  is transmitted to the base unit, and is then delivered by way of the wireless receiving part  15  in the base unit  11 , to the control part  13  which therefore selects the corresponding information in the memory  26  before the compression. 
   Next, the user displays the above-mentioned abbreviated telephone number on the display screen  35  of the wireless handset, and selects one information in the list with the use of the operating part  34 , and accordingly, an information selecting signal produced from the control part  31  is transmitted to the base unit  11  by way of the cordless communication part  32 . Thus, the control part  13  selects a telephone number corresponding to the abbreviated telephone number, and stored in the memory part  26 . 
   Further, the user manipulates the operating part  34  in the wireless handset  12  so as to transmit an information transmitting instruction to the base unit  11 , the control part  13  which receives a signal of the information transmitting instruction, transmits the selected information together with the selected telephone number to a partner&#39;s information terminal unit. 
   It is noted here that if an external equipment such as a laser printer which can carry out high quality printing is connected to the interface part  25 , data is transmitted to the external equipment by manipulating the operating part  34  in the wireless handset  12 , and accordingly, information displayed on the display part  35  of the wireless handset  12  can be printed by the external equipment. 
   Further, in such a case that the wireless handset  12  solely accept an information service for mobile telephones, the information obtained on the wireless handset  12  can be transmitted to the base unit  11  after it is converted into data which can be received by the base unit side  11  within the range of possible cordless communication, and accordingly, the information obtained by the wireless handset  12  can be transmitted to the base unit  11  so as to be displayed on the display part  22  of the base unit  11 . Further, information displayed on the display part  35  of the wireless handset  12  can be transmitted to the base unit  11  so as to be printed on the base unit  11  side. 
   As mentioned above, in this embodiment, the wireless handset  12  and the base unit  11  in a pair accept information services for stationary telephone sets. Accordingly, if the wireless handset is the one which solely accepts information services for mobile telephones, for example, a PHS, the wireless handset  12  is used as an inherent wireless handset within a home where the base unit  11  is installed, and accordingly, information services for stationary telephone sets are available for the wireless handset  12 . Further, outdoor, the wireless handset  12  can be used as a PHS, and accordingly, information services for mobile telephones is also available for the wireless handset  12 . Thus, the wireless handset can accept information services for both stationary telephone sets and mobile telephones. 
   Many modifications and variations of the present invention are possible in the light of the above-mentioned techniques. It is therefore to be understood that within the scope of the appended claims the invention may be practices otherwise than as specifically described.