Abstract:
In a telecommunication system having at least two communicants (i.e., a caller and a callee), a system and method are presented for collecting information associated with the geographical location of either of the communicants. In one embodiment, the approach entails receiving a geographical location corresponding to a public switched telephone network (PSTN) telephone number, and collecting geographical location information associated with the received geographical location.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a continuation of U.S. patent application Ser. No. 10/200,906 filed Jul. 23, 2002, the contents of which are incorporated herein by reference in their entirety. 
     
    
     FIELD OF INVENTION 
       [0002]    The present invention relates generally to telecommunications, and, more particularly, to a system and method for gathering information related to a geographical location. 
       BACKGROUND 
       [0003]    Modem communications systems permit callers and callees, who are often separated by great distances, to freely dialogue with one another. However, when a caller initiates a call (or session) to a callee, very little information about the callee may be available to the caller prior to establishing a session. Similarly, when a callee receives a call from a caller, very little information about the caller may be available to the callee until a session has been established. In some instances, additional information about a caller or callee may facilitate dialogue between the two parties. To date, very little is available to provide such information in a communication system. A need, therefore, exists in the industry to address this deficiency. 
       SUMMARY 
       [0004]    In architecture, one embodiment, among others, of the system comprises geographical location logic configured to receive a geographical location corresponding to a public switched telephone network (PSTN) telephone number, wherein geographical location logic is configured to receive the geographical location in response to an incoming telephone call from a PSTN telephone. This embodiment of the system further comprises information collection logic configured to collect geographical location information associated with the received geographical location. Another embodiment, among others, may be seen as a method comprising the steps of receiving a geographical location in response to an incoming telephone call from a public switched telephone network (PSTN) telephone, wherein the geographical location corresponds to a PSTN telephone number of the incoming telephone call. This embodiment of the method further comprises the step of collecting geographical location information associated with the received geographical location. 
         [0005]    Other systems, methods, features, and advantages of the present invention will be or become apparent to one with skill in the art upon examination of the following drawings and detailed description. It is intended that all such additional systems, methods, features, and advantages be included within this description, and be within the scope of the present invention. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]    Many aspects of the invention can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present invention. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
           [0007]      FIG. 1  is a block diagram showing an Internet telephony system of the prior art, in which a caller device and a callee device are engaged in Internet telephony. 
           [0008]    FIGS.  2 A and  2 E 3  are flowcharts showing one process associated with the system of  FIG. 1 . 
           [0009]      FIGS. 3A through 3E  are flowcharts showing another process associated with the system of  FIG. 1 . 
           [0010]      FIG. 4  is a block diagram showing another Internet telephony system of the prior art, in which a caller device and a callee device are engaged in Internet telephony. 
           [0011]      FIGS. 5A and 5B  are flowcharts showing one process associated with the system of  FIG. 4 . 
           [0012]      FIG. 6  is a block diagram showing a telephony system in a public switched telephone network (PSTN), in which a caller telephone communicates with a callee telephone. 
           [0013]      FIGS. 7A and 7B  are flowcharts showing one process associated with the system of  FIG. 6 . 
           [0014]      FIG. 8  is a block diagram showing one embodiment of an Internet telephony system, in which a caller device and a callee device are configured to retrieve location information. 
           [0015]      FIG. 9A  is a block diagram showing the caller device of  FIG. 8  in greater detail. 
           [0016]      FIG. 9B  is a block diagram showing the callee device of  FIG. 8  in greater detail. 
           [0017]      FIGS. 10A through 10D  are flowcharts showing one embodiment of a process for obtaining location information in an Internet telephony system. 
           [0018]      FIGS. 11A through 11G  are flowcharts showing another embodiment of a process for obtaining location information in an Internet telephony system. 
           [0019]      FIG. 12  is a block diagram showing another embodiment of an Internet telephony system, in which a caller device and a callee device are configured to retrieve location information. 
           [0020]      FIGS. 13A through 13D  are flowcharts showing one embodiment of a process for obtaining location information in an Internet telephony system. 
           [0021]      FIG. 14  is a block diagram showing one embodiment of a PSTN telephony system in which a PSTN caller and a PSTN callee may retrieve location information. 
           [0022]      FIG. 15A  is a block diagram showing the caller computer of  FIG. 14  in greater detail. 
           [0023]      FIG. 15B  is a block diagram showing the callee computer of  FIG. 14  in greater detail. 
           [0024]      FIGS. 16A through 16D  are flowcharts showing one embodiment of a process for obtaining location information in a PSTN telephony system. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0025]    Having summarized various aspects of the present invention, reference is now made in detail to the description of the embodiments as illustrated in the drawings. While the several embodiments are described in connection with these drawings, there is no intent to limit the invention to the embodiment or embodiments disclosed herein. On the contrary, the intent is to cover all alternatives, modifications, and equivalents included within the spirit and scope of the invention as defined by the appended claims. 
         [0026]      FIG. 1  is a block diagram showing an Internet telephony system of the prior art, in which a caller device  101  and a callee device  105  are engaged in Internet telephony. As shown in the environment of  FIG. 1 , an Internet telephony caller device  101  establishes a session with an Internet telephony callee device  105  through a proxy server  103 , which may be located within the Internet  100 . The Internet telephony caller device  101  may be a general-purpose computer, a session initiation protocol (SIP) telephone, or any programmable device that is configured to engage in Internet telephony. Once the session has been established between the Internet telephony caller device  101  and the Internet telephony callee device  105  through the proxy server  103 , the Internet telephony caller device  101  and the Internet telephony callee device  105  may engage directly in the session without the assistance of the proxy server  103 . In a preferred embodiment, the session is established over the Internet  100 . A prior art method, which uses the system of  FIG. 1 , is shown in  FIGS. 2A and 2B . 
         [0027]      FIGS. 2A and 2B  are flowcharts showing one process associated with the system of  FIG. 1 . In the embodiment of  FIG. 2A , the process begins when an Internet telephony caller device  101  sends, in step  204 , an invite request having a universal resource identifier (URI) of a desired callee. The URI may be a hypertext markup language (HTML) address, a file transfer protocol (FTP) address, a session initiation protocol (SIP) address, an email address, or any number of other identifiers. In the specific embodiment of  FIG. 2A , the URI is a SIP address. The invite request sent  204  by the Internet telephony caller device  101  is received, in step  206 , by a proxy server  103 . The proxy server then contacts, in step  208 , a location service (not shown) using the received  206  URI. If, as in the embodiment of  FIGS. 2A and 2B , the request is a non-forking request  211  in which there is only one Internet protocol (IP) address located for the URI, then the proxy server  103  obtains, in step  210 , the precise Internet address of the Internet telephony callee device  105 , and issues, in step  212 , an invite request to the obtained IP address. The issued  212  invite request is received, in step  214 , by the Internet telephony callee device  105  from the proxy server  103 . 
         [0028]    At this point, the process continues in  FIG. 2B , wherein the Internet telephony callee device  105  returns, in step  226 , a success indication to the proxy server  103 . The proxy server  103  receives, in step  228 , the success indication from the Internet telephony callee device  105 , and relays, in step  230 , the success indication to the Internet telephony caller device  101 . The relayed  230  success indication is received in step  232  by the Internet telephony caller device  101 , which issues, in step  234 , an acknowledgement of receipt, and transmits, in step  236 , the acknowledgement to the proxy server  203 . The proxy server  103  receives, in step  238 , the acknowledgement from the caller device  101 , and forwards, in step  240 , the acknowledgement to the Internet telephony callee device  105 . The Internet telephony callee device  105  receives, in step  242 , the acknowledgement from the proxy server  103 , thereby establishing a session between the Internet telephony caller device  101  and the Internet telephony callee device  105 . Thus, as shown in the embodiment of  FIGS. 2A and 2B , once the SIP session has been established between the Internet telephony caller device  101  and the Internet telephony callee device  105 , a caller and a callee may freely dialogue using the established session. 
         [0029]    While  FIGS. 2A and 2B  describe a process that is specific to SIP, it will be clear to one of ordinary skill in the art that other well-known Internet telephony sessions may be established using similar procedures. Additionally, while the session is described in terms of Internet telephony devices  101 ,  105 , it will be clear to one of ordinary skill in the art that the Internet telephony devices  101 ,  105  map be general-purpose computers, SIP telephones, or any programmable device configured to engage in Internet telephony. Furthermore, since the process associated with a non-forking request  211  is described in detail in RFC 2543, further discussion of the process is omitted here. In any event, it can be seen from the process of  FIGS. 2A and 2B  that, while the Internet telephony caller device  101  has knowledge of the IP address of the Internet telephony callee device  105 , and vice versa, neither the Internet telephony caller device  101  nor the Internet telephony callee device  105  has much more information than the IP address. 
         [0030]      FIGS. 3A through 3E  are flowcharts showing another process associated with the system of  FIG. 1 . Unlike the process described with reference to  FIGS. 2A and 2B , which describe a non-forking request  211 , the process of  FIGS. 3A through 3E  describe method steps associated with a parallel forking proxy  312 . In this sense, rather than having a single IP address associated with the callee URI, the process of  FIGS. 3A through 3E  addresses a situation in which multiple IP addresses are associated with the callee URI. As such, the process begins with an Internet telephony caller device  101  sending, in step  304 , an invite request, which has a URI of a callee. The invite request having the URI is received, in step  306 , by a proxy server  103 , which contacts, in step  308 , a location service (not shown) using the received  306  URI. The proxy server  103  then obtains, in step  310 , the precise Internet addresses of the Internet telephony callee device  105  from the location service. Since the process of  FIGS. 3A through 3E  relate to a situation in which multiple IP addresses are associated with the URI, the proxy server  103  issues parallel forking requests  312 . For purposes of illustration, this may be seen as the proxy server  103  issuing, in step  314 , an invite request to the first obtained  310  Internet address, and determining, in step  316 , whether or not invitations have been issued for all obtained  310  IP addresses. If it is determined  316  that not all invite requests have been issued, then the proxy server issues, in step  318 , another invite request to the next obtained  310  IP address, and again determines  316  whether or not invitations have been issued for all obtained  310  IP addresses. If, on the other hand, it is determined  316  that all invite requests have been issued, then the process continues to  FIG. 3B . 
         [0031]      FIG. 3B  shows an interchange between the Internet telephony callee device  105  and the proxy server  103  for a parallel forking proxy  312 . While only one Internet telephony callee device  105  is shown for simplicity, it will be clear to one of ordinary skill in the art that an Internet telephony callee device  105  at each of the obtained  310  IP addresses function similarly to acknowledge or reject the invite request. As such, once all invite requests have been issued, each of the Internet telephony callee devices  305  receives, in step  323 , an invite request. Upon receiving  323  the invite request, it is determined, in step  324 , whether or not the Internet telephony callee device  105  is logged on (i.e., present) on the Internet  100 . If it is determined  324  that the Internet telephony callee device  105  is not logged on, then a not found response is returned, in step  326 , to the proxy server  103 , which acknowledges, in step  328 , the not found response from the Internet telephony callee device  105 . However, if it is determined  324  that the Internet telephony callee device  105  is logged on, then a success indication is returned, in step  330 , to the proxy server  103 . Thus, if multiple IP addresses return success indications, then the proxy server  103  receives, in step  332 , multiple success indications from each of the logged-on Internet telephony callee devices  105 , and relays, in step  334 , the success indications to the Internet telephony caller device  101 , and the process continues in  FIG. 3C . 
         [0032]    As shown in  FIG. 3C , the Internet telephony caller device  101  receives, in step  340 , the first success indication from the proxy server  103 , and issues, in step  342 , an acknowledgement of the receipt of the success indication. The Internet telephony caller device  101  then transmits, in step  344 , the issued  342  acknowledgement to the proxy server  103 , and determines, in step  346 , whether or not there are additional success indications. If it is determined  346  that there are additional success indications, then the Internet telephony caller device  101  receives, in step  350 , the next success indication from the proxy server  103 , and the process repeats from the issuing step  342  until all success indications have been received. If, on the other hand, it is determined  346  that there are no additional success indications, then the Internet telephony caller device  101  determines, in step  348 , whether or not only one success indication was received. If only one success indication was received by the Internet telephony caller device  101 , then the process continues in  FIG. 3D . However, if more than one success indication was received by the Internet telephony caller device  101 , then the process continues in  FIG. 3E . 
         [0033]      FIG. 3D  shows establishment of a SIP session when only one success indication is received by the Internet telephony caller device  101 . Since, in  FIG. 3D , only one acknowledgement is issued  342  by the Internet telephony caller device  101 , the proxy server  103  receives, in step  356 , the acknowledgement, and forwards, in step  358 , the acknowledgement to the Internet telephony callee device  105 , which receives, in step  360 , the acknowledgement from the proxy server  103 , thereby establishing a session between the Internet telephony caller device  101  and the Internet telephony callee device  105 . Once the session has been established, the caller and the callee are free to dialogue using the established session. 
         [0034]      FIG. 3E  shows establishment of a SIP session when multiple success indications are received by the Internet telephony caller device  101 . Since multiple acknowledgements have been issued  342  by the Internet telephony caller device  101 , the proxy server  103  receives, in step  366 , multiple acknowledgements. The multiple acknowledgements are then forwarded, in step  368 , to each of the Internet telephony callee devices  105  that are logged on. Each of the Internet telephony callee device  105  receives, in step  370 , the acknowledgement from the proxy server  103 , at which point multiple session are established between the Internet telephony caller device  101  and the multiple Internet telephony callee devices  105  that are logged on. A caller at the Internet telephony caller device  101  may further determine, in step  372 , which of the multiple established sessions is the desired session, and disconnect, in step  374 , all of the undesired sessions, thereby continuing the session with only the desired callee at the desired Internet telephony callee device  105 . 
         [0035]    While  FIGS. 3A through 3E  describe a process that is specific to SIP, it will be clear to one of ordinary skill in the art that other well-known Internet telephony sessions may be established using similar procedures. Additionally, while the session is described in terms of Internet telephony devices  101 ,  105 , it will be clear to one of ordinary skill in the art that the Internet telephony devices  101 ,  105  may be general-purpose computers, SIP telephones, or any programmable device configured to engage in Internet telephony. Furthermore, since the process associated with a parallel forking requests  312  is described in detail in RFC 2543, further discussion of the process is omitted here. In any event, it can be seen from the process of  FIGS. 3A through 3E  that, while the Internet telephony caller device  101  again has knowledge of the IP address of the Internet telephony callee device  105 , and vice versa, neither the Internet telephony caller device  101  nor the Internet telephony callee device  105  has much more information than the IP address. 
         [0036]      FIG. 4  is a block diagram showing another Internet telephony system of the prior art, in which an Internet telephony caller device  101  and an Internet telephony callee device  105  are engaged in Internet telephony. As shown in the environment of  FIG. 4 , an Internet telephony caller device  101  establishes a session with an Internet telephony callee device  105  by using a redirect server  401 , which may be located within the Internet  100 . Again, the Internet telephony caller device  101  may be a general-purpose computer, a SIP telephone, or any programmable device that is configured to engage in Internet telephony. Once an IP address of the Internet telephony callee device  105  has been obtained by the Internet telephony caller device  101  from the redirect server  401 , the Internet telephony caller device  101  may establish a session with the Internet telephony callee device  105 . In a preferred embodiment, the session is established over the Internet  100 . A prior art method, which uses the system of  FIG. 4 , is shown in  FIGS. 5A and 5B . 
         [0037]      FIGS. 5A and 5B  are flowcharts showing one process associated with the system of  FIG. 4 . In the embodiment of  FIG. 5A , the process begins when an Internet telephony caller device  101  sends, in step  504 , an invite request having a URI of a desired callee. The URI may be a HTML address, a FTP address, a SIP address, an email address, or any number of other identifiers. In the specific embodiment of  FIG. 5A , the URI is a SIP address. The invite request sent  504  by the Internet telephony caller device  101  is received, in step  506 , by a redirect server  401 . The redirect server  401  contacts, in step  508 , a location service (not shown) using the URI in the received  506  invite request. A precise IP address of the Internet callee device  105  is then obtained, in step  510 , from the location service, and the obtained IP address is returned, in step  512 , to the Internet telephone caller device  101 . The Internet telephony caller device  101  receives, in step  514 , the obtained Internet address from the redirect server  401 , and issues, in step  516 , an acknowledgement of the receipt of the IP address. The acknowledgement is then transmitted, in step  518 , by the Internet telephony caller device  101  to the redirect server  401 . Additionally, the Internet telephony caller device  101  sends, in step  522 , an invite request to the obtained IP address, which is assigned to an Internet telephony callee device  105 . The Internet telephony callee device  105  receives, in step  524 , the invite request from the Internet telephony caller device  101 , and the process continues in  FIG. 5B . 
         [0038]    As shown in  FIG. 5B , once the invite request has been received  524 , the Internet telephony callee device  105  returns, in step  534 , a success indication to the Internet telephony caller device  101 . The Internet telephony caller device  101  receives, in step  536 , the success indication from the Internet telephony callee device  105 , and issues, in step  538 , an acknowledgement of the receipt of the success indication. The acknowledgement is then transmitted, in step  540 , from the Internet telephony caller device  101  to the Internet telephony callee device  105 . The Internet telephony callee device  105  receives, in step  542 , the acknowledgement from the Internet telephony caller device  101 , thereby establishing a session with the Internet telephony caller device  101 . Thus, as shown in the embodiment of  FIGS. 5A and 5B , once the SIP session has been established between the Internet telephony caller device  101  and the Internet telephony callee device  105 , a caller and a callee may freely dialogue using the established session. 
         [0039]    While  FIGS. 5A and 5B  describe a process that is specific to SIP, it will be clear to one of ordinary skill in the art that other well-known Internet telephony sessions may be established using similar procedures. Additionally, while the session is described in terms of Internet telephony devices  101 ,  105 , it will be clear to one of ordinary skill in the art that the Internet telephony devices  101 ,  105  may be general-purpose computers, SIP telephones, or any programmable device configured to engage in Internet telephony. Furthermore, since the process associated with the redirect server  401  is described in detail in RFC 2543, further discussion of the process is omitted here. In any event, it can be seen from the process of  FIGS. 5A and 5B  that, while the Internet telephony caller device  101  again has knowledge of the IP address of the Internet telephony callee device  105 , and vice versa, neither the Internet telephony caller device  101  nor the Internet telephony callee device  105  has much more information than the IP address. 
         [0040]    While several embodiments of Internet telephony sessions have been shown in  FIGS. 1 through 5B  to illustrate the deficiency associated with Internet telephony, similar deficiencies exist in public switched telephone network (PSTN) since current systems provide very little information other than caller identification. ‘This deficiency is illustrated through  FIGS. 6 ,  7 A, and  7 B. 
         [0041]      FIG. 6  is a block diagram showing a prior-art PSTN telephony system, in which a PSTN caller telephone  601  communicates with a PSTN callee telephone  611 . Since PSTN telephony systems are well known, only a cursory discussion of PSTN is presented with reference to  FIG. 6 . As shown in  FIG. 6 , a PSTN caller telephone  601  and a PSTN callee telephone  611  are configured to communicate with each other through a PSTN  600 , The PSTN  600  includes a caller service switching point (SSP)  603 , which—is configured to connect both outgoing and incoming calls to the PSTN caller telephone  603  through the PSTN  600 . The PSTN  600  also includes a callee SSP  607 , which is similarly configured to connect outgoing and incoming calls to the PSTN callee telephone  613 . Both the caller SSP  603  and the callee SSP  607  are configured to communicate with a service control point (SCP)  605 , which, as is well-known, performs a variety of advanced intelligent network (AIN) functions including area number calling service, disaster recovery service, do not disturb service, and 5-digit extension dialing service, etc. A broad overview of the system of  FIG. 6  may begin with a caller dialing a telephone number using the PSTN caller telephone  603 . The dialed call is processed by the caller SSP  603 , which contacts the SCP  605  for further call processing. The SCP  605  contacts a callee SSP  607  with a connection request in order to connect the call from the caller. The callee SSP  607  accepts the connection request and connects the call though to the PSTN callee telephone  611 . 
         [0042]      FIG. 7A and 7B  are flowcharts showing one process associated with the prior-art system of  FIG. 6 . Since call connection in a PSTN  600  are well known, only an abridged description is presented with reference to  FIGS. 7A and 7B . Specifically, the example of  FIGS. 7A and 7B  shows execution of an arbitrary advanced intelligent network (AN) instruction using a dialed feature code. As shown in  FIG. 7A , a PSTN caller telephone receives, in step  702 , a feature code. A telephone number is then dialed, in step  704 , and a caller service switching point  603  receives, in step  706 , the dialed number with the feature code. Upon receiving  706  the dialed number with the feature code, the caller service switching point  603  issues, in step  708 , a query to the service control point  605 . The service control point  605  receives, in step  710 , the query from the service switching point, and issues, in step  712 , an instruction corresponding to the feature code. In response to the issued  712  instruction, the service control point  605  executes, in step  714 , an AIN function corresponding to the feature code. Examples of AIN functions, which are well known in the art, include area number calling service, disaster recovery service, do not disturb service, five digit extension dialing service, etc. Upon executing  714 , the AIN function corresponding to the feature code, the service control point  605  instructs, in step  716 , the caller service switching point to continue the call processing. The caller service switching point receives, in step  718 , a continue processing instruction from the service control paint  605 , and the process continues in  FIG. 7B . 
         [0043]    As shown in  FIG. 7B , once the caller service switching point  603  receives  718  the continue instruction, the caller service switching point  603  issues, in step  724 , a connection request to the caller service switching point. The callee service switching point  609  receives, in step  726 , the connection request from the caller service switching point and accepts, in step  728 , the connection request. Once the connection request has been accepted  728 , a call is connected in step  730 , between the PSTN callee telephone  611  and the PSTN caller telephone  601 . Thus, as shown in the embodiment of  FIGS. 7A and 75 , once the PSTN telephone call has been established between the PSTN callee telephone  611  and the PSTN caller telephone  601 , a callee and a caller may freely dialogue using the established call through the PSTN  600 . 
         [0044]    As seen from  FIGS. 7A and 7B , while a callee may know the caller&#39;s telephone number through a mechanism such as caller ID, and the caller may know the callee&#39;s telephone number to which the caller has dialed, very little additional information is available to either the callee or the caller during the process outlined in  FIGS. 7A and 7B . 
         [0045]      FIG. 8  is a block diagram showing one embodiment of an Internet telephony system, in which an Internet telephony caller device having location information retrieval capabilities  801  and an Internet telephony callee device having location information retrieval capabilities  805  are in communication with each other over the Internet  100 . The Internet telephony caller device having location information retrieval capabilities  801  may be a general-purpose computer, a session initiation protocol (SIP) telephone, or any programmable device that is configured to engage in Internet telephony. For simplicity, the Internet telephony caller device having location information retrieval capabilities  801  is referred to hereinafter as a location-information-retrieving caller device  801 . Similarly, the Internet telephony callee device having location information retrieval capabilities  805  may also be a general-purpose computer, a session initiation protocol (SIP) telephone, or any programmable device that is configured to engage in Internet telephony. Again, for simplicity, the Internet telephony callee device having location information retrieval capabilities  805  is referred to hereinafter as a location-information-retrieving callee device  805 . 
         [0046]    In addition to the location-information-retrieving caller device  801  and location-information-retrieving callee device  805 , the embodiment of  FIG. 8  includes a proxy server  103 , an information server  803 , and an Internet address location database  807 , which are, preferably, located within the Internet  100 . A broad overview of the operation begins with the location-information-retrieving caller device  801  initiating a session with the location-information-retrieving callee device  805 . In the embodiment of  FIG. 8 , a proxy server  103  is used to initiate the session. During the initiation of the session, the proxy server  103  relays the IP address of the location-information-retrieving callee device  805  to the location-information-retrieving caller device  801 , and, also, relays the IP address of the location-information-retrieving caller device  801  to the location-information-retrieving callee device  805 . Thus, as the session is being initiated, both the location-information-retrieving caller device  801  and the location-information-retrieving callee device  805  have knowledge of the other&#39;s IP address. Once the location-information-retrieving caller device  801  knows the IP address of the location-information-retrieving callee device  805 , the location-information-retrieving caller device  801  accesses the Internet address location database  807  to obtain a geographical location associated with the IP address of the location-information-retrieving callee device  805 . The obtained geographical location is then used to further retrieve geographical location information associated with the location-information-retrieving callee device  805  from an information server  803 . Similarly, once the location-information-retrieving callee device  805  knows the IP address of the location-information-retrieving caller device  801 , the location-information-retrieving callee device  805  accesses the Internet address location database  807  to obtain a geographical location associated with the IP address of the location-information-retrieving caller device  801 . The obtained geographical location is then used to further retrieve geographical location information associated with the location-information-retrieving caller device  801  from the information server  803 . The information server  803  has various information related to geographic locations, such as local time, local weather reports, local news, local sporting events, etc. for any given geographical location. Thus, the information server  803  may comprise a plurality of databases (not shown) such as Internet servers for weather, for sports, for news, or a plethora of other Internet accessible databases. Alternatively, the information server  803  may be a dedicated server or system configured to locally store all of the geographical location information. Thus, either the location-information-retrieving caller device  801  or the location-information-retrieving callee device  805  may access the information server  803  to obtain information associated with a specific geographical location. 
         [0047]    An embodiment of the location-information-retrieving caller device  801  and the location-information-retrieving callee device  805  are shown in greater detail in  FIGS. 9A and 9B , respectively. 
         [0048]      FIG. 9A  is a block diagram showing the location-information-retrieving caller device  801  of  FIG. 8  in greater detail. As shown in  FIG. 9A , the location-information-retrieving caller device  801  comprises an Internet telephony logic  930 , which may include any hardware or software necessary to engage in Internet telephony. Since hardware and software configured for Internet telephony are well known, further discussion of Internet telephony hardware and software are omitted here. The location-information-retrieving caller device  801  also comprises an input device  918 , which may be a computer keyboard, a mouse, a numeric keypad, or any number of well-known input peripheral devices. Additionally, the location-information-retrieving caller device  801  comprises information collection logic  922 , which includes a list of items  928  and selection logic  924 . The list of items  928  may be a list showing available information for a specific geographical location, such as local time, local weather reports, local sporting events, local news, etc. from which a user may select desired items. For example, if a user desires to only find out the local news and local weather report for a given location, then the user may select only the local news and local weather report from the list of items. In this sense, the input device  918  may be used to input a user&#39;s selection. The selected items  930  may be stored in the information collection logic  922  for later use. Since systems and methods for selecting items from a list is well-known in the art, further discussion of the selection of the items is omitted here. 
         [0049]    In addition to the input device  918  and the information collection logic  922 , the location-information-retrieving caller device  801  further comprises geographical location retrieval logic  902 , an interface  912  having a receiver  914  and a transmitter  916 , and a display unit  926 . The interface  912  is configured to receive information via the receiver  914  and transmit information via the transmitter  916 . In one embodiment, the interface  912  receives the geographical location from the location server  1407 , as well as the geographical location information from the information server  803 . The geographical location retrieval logic  902  retrieves and stores a specific geographical location from the location server  1407 . This information is used by the information collection logic  922  during the retrieval of geographical location information associated with the callee&#39;s location. Once the desired information has been collected by the information collection logic  922 , the collected information may be displayed on the display unit  926 . As such, the display unit  926  may be a computer monitor or any number of known display devices. 
         [0050]      FIG. 9B  is a block diagram showing the location-information-retrieving callee device  805  of  FIG. 8  in greater detail. Since, in this embodiment, the operation of the location-information-retrieving callee device  805  is similar to the operation of the location-information-retrieving caller device  801 , the components of location-information-retrieving callee device  805  are similar to the components of location-information-retrieving caller device  801  of  FIG. 9A . As shown in  FIG. 9B , the location-information-retrieving callee device  805  comprises Internet telephony logic  930  permits the location-information-retrieving callee device  805  to engage in Internet telephony. Since hardware and software for Internet telephony is well known, further discussion of Internet telephony hardware and software is omitted here. The location-information-retrieving callee device  805  also comprises an input device  918 , which may be a computer keyboard, a mouse, a numeric keypad, or any number of well-known input peripheral devices. Additionally, the location-information-retrieving callee device  805  comprises information collection logic  922 , which includes a list of items  928  and selection logic  924 . Similar to  FIG. 9A , the list of items  928  may be a list showing available information for a specific geographical location, such as local time, local weather reports, local sporting events, local news, etc. from which a user may select desired items. For example, if a user desires to only find out the local news and local weather report for a given location, then the user may select only the local news and local weather report from the list of items. In this sense, the input device  918  may be used to input a user&#39;s selection. The selected items  930  may be stored in the information collection logic  922  for later use. Since systems and methods for selecting items from a list is well-known in the art, further discussion of the selection of the items is omitted here. 
         [0051]    In addition to the input device  918  and the information collection logic  922 , the location-information-retrieving callee device  805  further comprises geographical location retrieval logic  902 , an interface  912  having a receiver  914  and a transmitter  916 , and a display unit  926 . The interface  912  is configured to receive information via the receiver  914  and transmit information via the transmitter  916 . In one embodiment, the interface  912  receives the geographical location from the location server  1407 , as well as the geographical location information from the information server  803 . The geographical location retrieval logic  902  retrieves and stores a specific geographical location from the location server  1407 . This information is used by the information collection logic  922  during the retrieval of geographical location information associated with the caller&#39;s location. Once the desired information has been collected by the information collection logic  922 , the collected information may be displayed on the display unit  926 . As such, the display unit  926  may be a computer monitor or any number of known display devices. 
         [0052]    Having described embodiments of systems for retrieving geographical location information, several embodiments of methods associated with the retrieval of geographical location information are shown in  FIGS. 10A through 11G . 
         [0053]      FIGS. 10A through 10D  are flowcharts showing one embodiment of the process for obtaining location information in an Internet telephony system, such as one shown in  FIG. 8 . As shown in  FIG. 10A , the process begins when an Internet telephony caller device having location information retrieval capabilities  801  sends, in step  1004 , an invite request having a URI. A proxy server  103  receives, in step  1006 , the invite request having the URI, and contact, in step  1008 , a location service (not shown) using the URI. The URI may be an HTML address, an FTP address, an SIP address, an email address, or any number of other identifiers used on the Internet. If, as in the embodiment of  FIGS. 10A through 10D , the request is a non-forking request  1011 , in which there is only one IP address located for the URI, then the proxy server  103  obtains, in step  1010 , a precise internet address of the Internet telephony callee device, and issues, in step  1012 , an invite request to the obtained internet address. The issued  1012  invite request is then received, in step  1014 , by the Internet telephony callee device having location information retrieval capabilities  805  from the proxy server  103 , and the process here continues to  FIG. 10B . Additionally, the obtained Internet address in relayed, in step  1018 , to the Internet telephony caller device having location information retrieval capabilities  801 . The Internet telephony caller device having location information retrieval capabilities  801  receives, in step  1020 , the Internet address from the proxy server  103 , and the process here continues in  FIG. 10C . 
         [0054]    Continuing in  FIG. 10B , once the Internet telephony callee device  805  receives  1014  the invite request, the Internet telephony callee device  805  returns and step  1026 , a success indication to the proxy server  103 . Upon returning  1026  the success indication to the proxy server  103 , the geographical location information retrieval process continues in  FIGS. 10D , while the session initiation process continues in  FIG. 10B . 
         [0055]    The session initiation process continues in  FIG. 10B  with the proxy sewer  103  receiving, in step  1028 , the success indication, and relaying, in step  1030 , the success indication to the location-information-retrieving caller device  801 . The location-information-retrieving caller device  801  receives, in step  1032 , the success indication from the proxy server  103 , and issues, in step  1034 , an acknowledgement of the receipt of the success indication. The issued  1034  acknowledgement is then transmitted, in step  1036 , to the proxy server  103  by the location-information-retrieving caller device  801 . The proxy server  103  receives, in step  1036 , the acknowledgement from the location-information-retrieving caller device  801 , and forwards, in step  1040 , the acknowledgement to the location-information-retrieving callee device  805 . The location-information-retrieving callee device  805  receives, in step  1042 , the acknowledgement from the proxy server  103 , thereby establishing a session between the location-information-retrieving caller device  801  and the location-information-retrieving callee device  805  over the Internet  100 . 
         [0056]      FIG. 10C  is a flowchart showing one embodiment of a geographical location information retrieval process from the perspective of the location-information-retrieving caller device  801  once the location-information-retrieving caller device  801  has the IP address of the location-information-retrieving callee device  805 . As shown in  FIG. 10C , once the IP address of the location-information-retrieving callee device  805  is received  1020  by the location-information-retrieving caller device  801 , the location-information-retrieving caller device  801  retrieves, in step  1053 , the geographical location of the location-information-retrieving callee device  805  from the information server  803 . In a preferred embodiment, the retrieval  1053  of the geographical location is performed by the geographical location retrieval logic  902  ( FIG. 9A ). Once the geographical location has been retrieved  1053 , the location-information-retrieving caller device  801  requests, in step  1054 , information that is related to the retrieved  1053  geographical location from the information server  803 . In a preferred embodiment, the caller has already inputted a list of selected items  926  into the location-information-retrieving caller device  801 . Thus, only the selected items  926  are requested by the location-information-retrieving caller device  801 . The information server  803  receives, in step  1055 , the request, and obtains, in step  1056 , the requested information. The obtained  1056  information is then transmitted, in step  1057 , from the information server  803  to the location-information- retrieving caller device  801 . The location-information-retrieving caller device  801  receives, in step  1058 , the requested information, and displays, in step  1059 , the received information on a display  926  ( FIG. 9A ). 
         [0057]      FIG. 10D  is a flowchart showing one embodiment of a geographical location information retrieval process from the perspective of the location-information-retrieving callee device  805  once the location-information-retrieving callee device  805  has the IP address of the location-information-retrieving caller device  801 . As shown in  FIG. 10D , once the EP address of the location-information-retrieving caller device  801  is known by the location-information-retrieving callee device  805  (e.g., after the success indication has been returned  1026 ), the location-information-retrieving callee device  805  retrieves, in step  1073 , the geographical location of the location-information-retrieving caller device  801  from the information server  803 . In a preferred embodiment, the retrieval  1073  of the geographical location is performed by the geographical location retrieval logic  902  ( FIG. 9B ). Once the geographical location has been retrieved  1073 , the location-information-retrieving callee device  805  requests, in step  1074 , information that is related to the retrieved  1073  geographical location from the information server  803 . In a preferred embodiment, the callee has already inputted a list of selected items  926  into the location-information-retrieving callee device  805 . Thus, only the selected items  926  are requested by the location-information-retrieving callee device  805 . The information server  803  receives, in step  1075 , the request, and obtains, in step  1076 , the requested information. The obtained  1076  information is then transmitted, in step  1077 , from the information server  803  to the location-information-retrieving callee device  805 . The location-information-retrieving callee device  805  receives, in step  1078 , the requested information, and displays, in step  1079 , the received information on a display  926  ( FIG. 9B ). 
         [0058]    As shown by  FIGS. 10A through 10D , the location-information-retrieving caller device  801  now has local geographical information associated with the location-information-retrieving callee device  805 . Similarly, the location-information-retrieving callee device  805  has local geographical information associated with the location-information-retrieving caller device  801 . In this sense, the information related to the specific geographic location of both the callee and the caller may facilitate dialogue between the callee and the caller. 
         [0059]      FIGS. 11A through 11G  are flowcharts showing another embodiment of a process for obtaining location information in an Internet telephony system. In the embodiment of  FIGS. 11A through 11G , an example of parallel forking requests is shown. As such, the process begins when a location-information-retrieving caller device  801  sends, in step  1104 , an invite request having a URI of a callee to a proxy server  703 . The proxy server  103  receives, in step  1106 , the invite request having the URI, and contacts, in step  1108 , a location service (not shown) using the URI. Upon contacting the location service (not shown), the proxy server  103  obtains, in step  1110 , precise Internet addresses of multiple location-information-retrieving callee devices  805  that are associated with the URI. Once the precise Internet addresses are obtained  1110 , the proxy server  103  issues, in step  1114 , an invite request to the first obtained Internet address, and determines, in step  1115 , whether or not invitations have been issued to all of the obtained IP addresses. If it has been determined  1115  that not all invitations have been issued, then the proxy server  103  issues, in step  1116 , an invite request to the next obtained Internet address, and again determines  1115  whether or not all invitations have been issued. Once invitations have been issued to all obtained IP addresses, the process continues in  FIG. 11B . 
         [0060]      FIG. 11B  is a flowchart showing a continuation of the process from  FIG. 11A . While only one location-information-retrieving callee device  805  is shown for convenience, it will be clear to one of ordinary skill in the art that, for parallel forking requests  1112 , multiple location-information-retrieving callee devices  805  receive invitations. Hence, while only one location-information-retrieving callee device  805  is shown, it should be evident that similar processes occur at each location-information-retrieving callee device  805  that receives an invite request. Continuing, once the proxy server  103  issues all invite requests, each location-information-retrieving callee device  805  receives, in step  1122 , the invite request from the proxy sewer  103 , and it is determined, in step  1123 , whether or not the location-information-retrieving callee device  805  is logged onto the Internet. If it is determined  1123  that the location-information-retrieving callee device  805  is not logged onto the Internet, then a not found response is returned, in step  1124 , to the proxy server  103 , which acknowledges, in step  1126 , the not found response. If, on the other hand, the location-information-retrieving callee device  805  is logged onto the Internet, then a success indication is returned, in step  1128 , to the proxy server  103 . At this point, since the location-information-retrieving callee device  805  has knowledge of the IP address of the location-information-retrieving caller device  801  from the invite request, the geographical location information retrieval process continues in  FIG. 11G . Additionally, once the success indication has been returned  1128  to the proxy server  103 , the proxy server  103  receives, in step  1130 , the success indication from each of the location-information-retrieving callee devices  805  that are logged onto the Internet and relays, in step  1134 , the success indication to the location-information-retrieving caller device  801 , and the session initiation process continues in  FIG. 11C . 
         [0061]    As shown in  FIG. 11C , the location-information-retrieving caller device  801  receives, in step  1138 , the first success indication from the proxy server  103 , and issues, in step  1140 , an acknowledgement of the receipt of the success indication. The acknowledgement is then transmitted, in step  1142 , to the proxy server  101  The location-information-retrieving caller device  801  then determines, in step  1143 , whether or not there are additional success indications. If the location-information-retrieving caller device  801  determines  1143  that there are additional success indications, then the location-information-retrieving caller device  801  receives, in step  1144 , the next success indication from the proxy server  103 , and repeats the process until all success indications have been received  1144  and acknowledged  1140 . When it is determined  1143  that there are no additional success indications, the location-information-retrieving caller device  801  further determines, in step  1145 , whether or not only one success indication has been received. If only one success indication has been received, then the process continues to  FIG. 11D . However, if more than one success indication has been received, then the process continues to  FIG. 11E . 
         [0062]      FIG. 11D  shows the continuation of the process when only one success indication has been received. As shown here, if only one success indication has been received, the location-information-retrieving caller device  801  may obtain, in step  1150  a precise IP address of the location-information-retrieving callee device  805 . Once the precise IP address of the location-information-retrieving callee device  805  has been obtained  1150 , the geographical location information retrieval process continues in  FIG. 11F . Additionally, once the single success indication has been received  1138  and an acknowledgement has been issued  1140 , the proxy server  103  receives, in step  1152 , the acknowledgement from the location-information-retrieving caller device  801 . The acknowledgement is then forwarded to the location-information-retrieving callee device  805  by the proxy server  103 . The location-information-retrieving callee device  805  receives the acknowledgement from the proxy server  103 , thereby establishing a session between the location-information-retrieving caller device  801  and the location-information-retrieving callee device  805 . At this point, the location-information-retrieving callee device  805  may obtain, in step  1158 , the precise IP address of the location-information-retrieving caller device  801  from the established session. Once the precise IP address of the location-information-retrieving caller device  801  is known by the location-information-retrieving callee device  805 , the geographical location information retrieval process, from the perspective of the location-information-retrieving callee device location-information-retrieving callee device  805 , continues in  FIG. 11G . 
         [0063]      FIG. 11E  shows the continuation of the process from  FIG. 11C  when more than one success indication been received. As shown here, the proxy server  103  receives, in step  1166 , multiple acknowledgements from the  801 , and forwards, in step  1168 , the acknowledgements to each of the location-information-retrieving callee devices  805  that are logged on to the Internet. Each of the location-information-retrieving callee devices  805  receives, in step  1170 , its respective acknowledgement from the proxy server  103 , thereby establishing multiple sessions between the various location-information-retrieving callee devices  805  and the location-information-retrieving caller device  801 . The caller at the location-information-retrieving caller device  801  then determines, in step  1172 , which of the multiple established session is the desired session, and all undesired sessions are then disconnected, in step  1176 . Thus, at this point, only one session remains between the location-information-retrieving callee device  805  and the location-information-retrieving caller device  801 , thereby permitting the location-information-retrieving caller device  801  to obtain, in step  1174 , a precise IP address of the desired location-information-retrieving callee device  805 . Once the precise IP address has been obtained  1174 , the geographical location information retrieval process, from the perspective of the location-information-retrieving caller device  801 , continues in  FIG. 11F . 
         [0064]      FIG. 11F  is a flowchart showing one embodiment of a geographical location information retrieval process from the perspective of the location-information-retrieving caller device  801  once the IP address of the location-information-retrieving callee device  805  is known by the location-information-retrieving caller device  801 . As shown in  FIG. 11F , the location-information-retrieving caller device  801  retrieves, in step  1179 , the geographical location of the location-information-retrieving callee device  805  from the information server  803 . In a preferred embodiment, the retrieval  1179  of the geographical location is performed by the geographical location retrieval logic  902  ( FIG. 9A ). Once the geographical location has been retrieved  1179 , the location-information- retrieving caller device  801  requests, in step  1180 , information that is related to the retrieved  1179  geographical location from the information server  803 . In a preferred embodiment, the caller has already inputted a list of selected items  926  into the location-information-retrieving caller device  801 . Thus, only the selected items  926  are requested by the location-information-retrieving caller device  801 . The information server  803  receives, in step  1181 , the request, and obtains, in step  1182 , the requested information. The obtained  1182  information is then transmitted, in step  1183 , from the information server  803  to the location-information-retrieving caller device  801 . The location-information-retrieving caller device  801  receives, in step  1184 , the requested information, and displays, in step  1185 , the received information on a display  926  ( FIG. 9A ). 
         [0065]      FIG. 11G  is a flowchart showing one embodiment of a geographical location information retrieval process from the perspective of the location-information-retrieving  25  callee device  805  once the location-information-retrieving callee device  805  has the IP address of the location-information-retrieving caller device  801 . As shown in  FIG. 11  G, once the IP address of the location-information-retrieving caller device  801  is known by the location-information-retrieving callee device  805  (e.g., after the success indication has been returned), the location-information-retrieving callee device  805  retrieves, in step  1189 , the geographical location of the location-information-retrieving caller device  801  from the information server  803 . In a preferred embodiment, the retrieval  1189  of the geographical location is performed by the geographical location retrieval logic  902  ( FIG. 9B ). Once the geographical location has been retrieved  1189 , the location-information-retrieving callee device  805  requests, in step  1190 , information that is related to the retrieved  1073  geographical location from the information server  803 . In a preferred embodiment, the callee has already inputted a list of selected items  926  into the location-information-retrieving callee device  805 . Thus, only the selected items  926  are requested by the location-information-retrieving callee device  805 . The information server  803  receives, in step  1191 , the request, and obtains, in step  1192 , the requested information. The obtained  1192  information is then transmitted, in step  1193 , from the information server  803  to the location-information-retrieving callee device  805 . The location-information-retrieving callee device  805  receives, in step  1194 , the requested information, and displays, in step  1159 , the received information on a display  926  ( FIG. 9B ). 
         [0066]    Similar to the embodiment of  FIGS. 10A through 10D , the location-information-retrieving caller device  801  of  FIGS. 11A through 11G  now has local geographical information associated with the location-information-retrieving callee device  805 . Similarly, the location-information-retrieving callee device  805  has local geographical information associated with the location-information-retrieving caller device  801 . In this sense, the information related to the specific geographic location of both the callee and the caller may facilitate dialogue between the callee and the caller. 
         [0067]      FIG. 12  is a block diagram showing another embodiment of an Internet telephony system in which a location-information-retrieving caller device  801  and a location-information-retrieving callee device  805  are in communication with each other over the Internet  100 . The embodiment of  FIG. 12  includes a location-information-retrieving caller device  801 , a location-information-retrieving callee device  805 , a redirect server  401 , an information server  803 , and an Internet address location database Internet address location database  807 . In a preferred embodiment, the information server  803 , and the Internet address location database  807  are located within the Internet  100 . A broad overview of the operation begins with the location-information-retrieving caller device  801  initiating a session with the location-information-retrieving callee device  805 . In the embodiment of  FIG. 12 , a redirect server  401  is used to initiate the session. During the initiation of the session, the redirect server  401  relays the IP address of the location-information-retrieving callee device  805  to the location-information-retrieving caller device  801 . The location-information-retrieving caller device  801  then directly initiates a session with the location-information-retrieving callee device  805  using the IP address received from the redirect server  401 . Thus, as the session is being initiated, both the location-information-retrieving caller device  801  and the location-information-retrieving callee device  805  have knowledge of the other&#39;s IP address. Once the location-information-retrieving caller device  801  knows the IP address of the location-information-retrieving callee device  805 , the location-information-retrieving caller device  801  accesses the Internet address location database  807  to obtain a geographical location associated with the IP address of the location-information-retrieving callee device  805 . The obtained geographical location is then used to further retrieve geographical location information associated with the location-information-retrieving callee device  805  from an information server  803 . Similarly, once the location-information-retrieving callee device  805  knows the IP address of the location-information-retrieving caller device  801 , the location-information-retrieving callee device  805  accesses the Internet address location database  807  to obtain a geographical location associated with the IP address of the location-information-retrieving caller device  801 . The obtained geographical location is then used to further retrieve geographical location information associated with the location-information-retrieving caller device  801  from the information server  803 . The information server  803  has various information related to geographic locations, such as local time, local weather reports, local news, local sporting events, etc. for any given geographical location. Thus, the information server  803  may comprise a plurality of databases (not shown) such as Internet servers for weather, for sports, for news, or a plethora of other Internet accessible databases. Alternatively, the information server  803  may be a dedicated server or system configured to locally store all of the geographical location information. Thus, either the location-information-retrieving caller device  801  or the location-information-retrieving callee device  805  may access the information server  803  to obtain information associated with a specific geographical location. 
         [0068]      FIGS. 13A through 13D  are flowcharts showing one embodiment of a process for obtaining location information in the Internet telephony system of  FIG. 12 . As shown in  FIG. 13A , the process begins when a location-information-retrieving caller device  801  sends, in step  1304 , an invite request having a URI of a callee to a redirect server  401 . The redirect server receives, in step  1306 , the invite request having the URI, and contacts, in step  1308 , a location service (not shown) using the received URI. Upon contacting the location service (not shown), the redirect server  401  obtains, in step  1310 , a precise IP address of a location-information-retrieving callee device  805  using the URI. The IP address is returned to the location-information-retrieving caller device  801 , which receives, in step  1314 , the IP address from the redirect server  401 . At this point, since the location-information-retrieving caller device  801  has knowledge of the IP address of the location-information-retrieving callee device  805 , it may retrieve geographical location information related to the location-information-retrieving callee device  805 . This is shown in  FIG. 13C . Additionally, once the IP address has been received from the redirect server  401 , the location-information-retrieving caller device  801  issues, in step  1316 , an acknowledgement of the receipt of the IP address. The acknowledgement is transmitted, in step  1318 , to the redirect server  401 , which receives, in step  1320 , the acknowledgement from the location-information-retrieving caller device  801 . The location-information-retrieving caller device  801  then sends, in step  1322 , an invite request directly to the obtained IP address of the location-information-retrieving callee device  805 , which is received, in step  1324 , by the location-information-retrieving callee device  805 , and the initiation of the session continues in  FIG. 13B . 
         [0069]    Continuing with  FIG. 13B , the location-information-retrieving callee device  805 , upon receiving the invite request, returns, in step  1334 , a success indication to the location-information-retrieving caller device  801 . At this point, the location-information-retrieving callee device  805  has knowledge of the IP address of the location-information-retrieving caller device  801  from the invite request, and, therefore, may initiate retrieval of geographical location information associated with the location-information-retrieving caller device  801 . This is shown in  FIG. 13D . The returned success indication is received, in step  1336 , by the location-information-retrieving caller device  801 , which issues, in step  1338 , an acknowledgement of the receipt of the success indication. The acknowledgement is transmitted, in step  1340 , to the location-information-retrieving callee device  805 , which receives, in step  1342 , the acknowledgement from the location-information-retrieving caller device  801 , thereby establishing a session between the location-information-retrieving caller device  801  and the location-information-retrieving callee device  805 . 
         [0070]      FIG. 13C  is a flowchart showing one embodiment of a geographical location information retrieval process from the perspective of the location-information-retrieving caller device  801  once the location-information-retrieving caller device  801  has the IP address of the location-information-retrieving callee device  805 . As shown in  FIG. 13C , once the IP address of the location-information-retrieving callee device  805  is received  1314  by the location-information-retrieving caller device  801 , the location-information-retrieving caller device  801  retrieves, in step  1353 , the geographical location of the location-information-retrieving callee device  805  from the information server  803 . In a preferred embodiment, the retrieval  1353  of the geographical location is performed by the geographical location retrieval logic  902  ( FIG. 9A ). Once the geographical location has been retrieved  1353 , the location-information-retrieving caller device  801  requests, in step  1354 , information that is related to the retrieved  1353  geographical location from the information server  803 . In a preferred embodiment, the caller has already inputted a list of selected items  926  into the location-information-retrieving caller device  801 . Thus, only the selected items  926  are requested by the location-information-retrieving caller device  801 . The information server  803  receives, in step  1355 , the request, and obtains, in step  1356 , the requested information. The obtained  1356  information is then transmitted, in step  1357 , from the information server  803  to the location-information-retrieving caller device  801 . The location-information-retrieving caller device  801  receives, in step  1358 , the requested information, and displays, in step  1359 , the received information on a display  926  ( FIG. 9A ). 
         [0071]      FIG. 13D  is a flowchart showing one embodiment of a geographical location information retrieval process from the perspective of the location-information-retrieving callee device  805  once the location-information-retrieving callee device  805  has the IP address of the location-information-retrieving caller device  801 . As shown in  FIG. 13D , once the IP address of the location-information-retrieving caller device  801  is known by the location-information-retrieving callee device  805  (e.g., after the success indication has been returned), the location-information-retrieving callee device  805  retrieves, in step  1373 , the geographical location of the location-information-retrieving caller device  801  from the information server  803 . In a preferred embodiment, the retrieval  1373  of the geographical location is performed by the geographical location retrieval logic  902  ( FIG. 9B ). Once the geographical location has been retrieved  1373 , the location-information-retrieving callee device  805  requests, in step  1374 , information that is related to the retrieved  1373  geographical location from the information server  803 . In a preferred embodiment, the callee has already inputted a list of selected items  926  into the location-information-retrieving callee device  805 . Thus, only the selected items  926  are requested by the location-information-retrieving callee device  805 . The information server  803  receives, in step  1375 , the request, and obtains, in step  1376 , the requested information. The obtained  1376  information is then transmitted, in step  1377 , from the information server  803  to the location-information-retrieving callee device  805 . The location-information-retrieving callee device  805  receives, in step  1378 , the requested information, and displays, in step  1379 , the received information on a display  926  ( FIG. 9B ). 
         [0072]    Having described several embodiments of systems and methods for retrieving geographical location information in an Internet telephony system, attention, is now turned to  FIGS. 14 through 16D , which show embodiments of a system and method for retrieving geographical location information in a PSTN telephony system. 
         [0073]      FIG. 14  is a block diagram showing a PSTN telephony system, in which a PSTN caller telephone  1403  and a PSTN callee telephone  1413  are in communication with each other. As shown in  FIG. 14 , a PSTN caller site  1401  and a PSTN callee site  1411  are configured to communicate with each other through a PSTN  600 . The PSTN caller site  1401  includes a PSTN caller telephone  1403  and a PSTN caller computer system  1405 , while the PSTN callee site  1411  includes a PSTN callee telephone  1413  and a PSTN callee computer system  1415 . The PSTN  600  includes a caller service switching point (SSP)  603 , which is configured to connect both outgoing and incoming calls to the PSTN caller telephone  1403  through the PSTN  600 . The PSTN  600  also includes a callee SSP  607 , which is similarly configured to connect outgoing and incoming calls to the PSTN callee telephone  1413 . Both the caller SSP  603  and the callee SSP  607  are configured to communicate with a service control point (SCP)  605 , which, as is well-known, performs a variety of advanced intelligent network (AIN) functions including area number calling service, disaster recovery service, do not disturb service, and 5-digit extension dialing service, etc. In the embodiment of  FIG. 14 , the SCP  605  is configured to further execute part of the location information retrieval function. In this sense, the SCP  605  communicates with a location server  1407  on the Internet  100 , which has information correlating telephone numbers with geographical locations. For example, the location server  1407  may have information that correlates a telephone area code to a specific geographical location, thereby permitting look-up of a geographical location if a telephone area code is known. More specifically, if an area code is associated with a broad geographic region, then the location server  1407  may have information that more specifically correlates a telephone number to, for example, a city or a county within the broad geographical region. 
         [0074]    The operating environment show in  FIG. 14  also includes an information server  803  located, preferably, in the Internet  100 . The information server  803  has various information related to geographic locations, such as local time, local weather reports, local news, local sporting events, etc. The information server  803  may comprise a plurality of databases (not shown) such as Internet servers for weather, for sports, for news, or a plethora of other Internet accessible databases. Alternatively, the information server  803  may be a dedicated server or system configured to locally store all of the geographical location information. Thus, either a PSTN caller computer system  1405  or a PSTN callee computer system  1415  may access the information server  803  to obtain information associated with a specific geographical location. 
         [0075]    A broad overview of one embodiment of the operation of the system of  FIG. 14  may begin with a caller programming into the PSTN caller computer system  1405 , a list of selected items associated with a callee. Similarly, the callee may program into the PSTN callee computer system  1415  a list of selected items associated with the caller. When the caller, who is logged on to the Internet  100  at the PSTN caller site  1401 , dials a telephone number using the PSTN caller telephone  1403 , the dialed call is processed by the caller SSP  603 , which contacts the SCP  605  for further call processing. The SCP  605  contacts a callee SSP  607  with a connection request in order to connect the call from the caller. Additionally, the SCP  605  issues an instruction to a location server  1407  to correlate the dialed telephone number to a specific geographical location and forward the geographical location to the PSTN caller computer system  1405 . The location server  1407  determines whether or not the PSTN caller computer system  1405  is logged on at the PSTN caller site  1401 , and if it is determined that the PSTN caller computer system  1405  is logged on, then the location server  1407  correlates the dialed telephone number to a specific geographical location, and relays the geographical location to the PSTN caller computer system  1405 . The PSTN caller computer system  1405  receives the geographical location, and accesses the information server  802 , which has information related to the geographical location, and retrieves the desired information. The retrieved information is displayed for the caller at the PSTN caller site  1401 . 
         [0076]    During this time, the callee SSP  607  accepts the connection request and connects the call through to the PSTN callee telephone  1413 . At this point, the SCP  605  further issues an instruction to a location server  1407  to correlate the caller&#39;s telephone number to a specific geographical location and forward the geographical location to the PSTN callee computer system  1415 . The location server  1407  determines whether or not the PSTN callee computer system  1415  is logged on at the PSTN callee site  1411 , and if it is determined that the PSTN callee computer system  1415  is logged on, then the location server  1407  correlates the caller&#39;s telephone number to a specific geographical location, and relays the geographical location to the PSTN callee computer system  1415 . The PSTN callee computer system  1415  receives the geographical location, and accesses the information server  802 , which has information related to the geographical location, and retrieves the desired information. The retrieved information is displayed for the caller at the PSTN callee site  1411 . Specific embodiments of a PSTN caller computer system  1405  and a PSTN callee computer system  1415  are shown in  FIGS. 15A and 15B , respectively. 
         [0077]      FIG. 15A  is a block diagram showing the PSTN caller computer system  1405  of  FIG. 14  in greater detail. As shown in  FIG. 15A , the PSTN caller computer system  1405  comprises an input device  1518 , which may be a computer keyboard, a mouse, a numeric keypad, or any number of well-known input peripheral devices. Additionally, the PSTN caller computer system  1405  comprises information collection logic  1522 , which includes a list of items  1528  and selection logic  1524 . The list of items  1528  may be a list showing available information for a specific geographical location, such as local time, local weather reports, local sporting events, local news, etc. from which a user may select desired items. For example, if a user desires to only find out the local news and local weather report for a given location, then the user may select only the local news and local weather report from the list of items. In this sense, the input device  1518  may be used to input a user&#39;s selection. The selected items  1530  may be stored in the information collection logic  1522  for later use. Since systems and methods for selecting items from a list is well- known in the art, further discussion of the selection of the items is omitted here. 
         [0078]    In addition to the input device  1518  and the information collection logic  1522 , the PSTN caller computer system  1415  further comprises geographical location logic  1502 , an interface  1512  having a receiver  1514  and a transmitter  1516 , and a display unit  1526 . The interface  1512  is configured to receive information via the receiver  1514  and transmit information via the transmitter  1516 . In one embodiment, the interface  1512  receives the geographical location from the location server  1407 , as well as the geographical location information from the information server  803 . The geographical location logic  1502  stores the specific geographical location that has been received from the location server  1407 . This information is used by the information collection logic  1522  during the retrieval of geographical location information associated with the callee&#39;s location. Once the desired information has been collected by the information collection logic  1522 , the collected information may be displayed on the display unit. As such, the display unit  1526  may be a computer monitor or any number of known display devices. 
         [0079]      FIG. 15B  is a block diagram showing the PSTN callee computer system  1415  of  FIG. 14  in greater detail. Since, in this embodiment, the operation of the PSTN callee computer system  1415  is similar to the operation of the PSTN caller computer system  1405 , the PSTN callee computer system  1315  is similar to the PSTN caller computer system  1405  of  FIG. 15A . As shown in  FIG. 15B , the PSTN callee computer system comprises an input device  1518 , which may he a computer keyboard, a mouse, a numeric keypad, or any number of well-known input peripheral devices. Additionally, the PSTN callee computer system  1415  comprises information collection logic  1522 , which includes a list of items  1528  and selection logic  1524 . Similar to  FIG. 15A , the list of items  1528  may be a list showing available information for a specific geographical location, such as local time, local weather reports, local sporting events, local news, etc. from which a user may select desired items. For example, if a user desires to only find out the local news and local weather report for a given location, then the user may select only the local news and local weather report from the list of items. In this sense, the input device  1518  may be used to input a user&#39;s selection. The selected items  1530  may be stored in the information collection logic  1522  for later use. Since systems and methods for selecting items from a list is well-known in the art, further discussion of the selection of the items is omitted here. 
         [0080]    In addition to the input device  1518  and the information collection logic  1522 , the PSTN callee computer system  1415  further comprises geographical location logic  1502 , an interface  1512  having a receiver  1514  and a transmitter  1516 , and a display unit  1526 . The interface  1512  is configured to receive information via the receiver  1514  and transmit information via the transmitter  1516 . In one embodiment, the interface  1512  receives the geographical location from the location server  1407 , as well as the geographical location information from the information server  803 . The geographical location logic  1502  stores the specific geographical location that has been received from the location server  1407 . This information is used by the information collection logic  1522  during the retrieval of geographical location information associated with the caller&#39;s location. Once the desired information has been collected by the information collection logic  1522 , the collected information may be displayed on the display unit. As such, the display unit  1526  may be a computer monitor or any number of known display devices. 
         [0081]    Having described one embodiment of a PSTN telephony system having geographical location information retrieval capabilities, attention is turned to  FIGS. 16A through 16D , which show one embodiment of a process for obtaining geographical location information in the PSTN telephony system of  FIGS. 14 through 15B . 
         [0082]      FIGS. 16A through 16D  are flowcharts showing one embodiment of a process for obtaining location information in a PSTN telephony system. In a preferred embodiment, as shown in  FIG. 16A , the process begins when a feature code is entered, in step  1602 , and a telephone number is dialed, in step  1606 , at a PSTN caller telephone  1403 . In an alternative embodiment, the process may begin with the dialing  1606  of the telephone number, and the information retrieval process may be disabled with the entry  1604  of the feature code. In any event, in the preferred embodiment, once the feature code has been entered  1604  and the telephone number dialed  1606 , a caller service switching point (SSP)  403  receives, in step  1608 , the dialed number with the feature code. The caller SSP  603  issues, in step  1610 , a query having the dialed telephone number to the service control point (SCP)  605 , which receives, in step  1612 , the query having the dialed telephone number from the caller SSP  603 . The SCP  605  instructs, in step  1614 , the caller SSP  603  to continue the call processing, and also issues, in step  1620 , an instruction to a location server  1407  to retrieve a geographical location correlated to the dialed telephone number. The instruction to continue call processing is received, in step  1616 , by the caller SSP  603 , and the call processing continues in  FIG. 16C . The issued  1620  instruction to the location server  1407  is received, in step  1622 , by the location server  1407 , which determines, in step  1624 , whether or not the caller is logged on at a PSTN caller computer system  1405  at the PSTN caller site  1401 . If it is determined that the caller is not logged on, then the retrieval of geographical location information is terminated, in step  1626 . If, on the other hand, it is determined  1624  that the caller is logged on to a PSTN caller computer system  1405 , then the geographical location information retrieval process continues in  FIG. 16B . 
         [0083]      FIG. 16B  is a flowchart showing one embodiment of the geographical information retrieval process as seen from the perspective of the PSTN caller. Once the location server  1407  has determined  1624  that a caller is logged on to a PSTN caller computer system  1405 , then the location server  1407  correlates, in step  1642 , the dialed telephone number to a specific geographical location. In one embodiment, this may be done using a lookup table or another database that has telephone numbers correlated to geographical locations. Since databases correlating geographical locations with telephone numbers are well-known in the art, further discussion of the correlating of geographical locations with telephone numbers is omitted here. Once a geographical location has been correlated to the dialed telephone number, the geographical location is relayed, in step  1644 , by the location server to the PSTN caller computer system  1405 . The PSTN caller computer system receives, in step  1646 , the geographical location using geographical location logic  1502  ( FIG. 15A ), and issues, in step  1648 , an instruction for information associated with the geographical location using information collection logic  1522  ( FIG. 15A ). Since, in a preferred embodiment, the process is executed by the PSTN caller computer system  1405  of  FIG. 15A , the PSTN caller computer system  1405  already has a list of selected items  1528  ( FIG. 15A ) related to a geographical location, which the caller desires lo collect. Hence, in the preferred embodiment, the issued  1648  instruction includes the list of items (e.g., local time, local weather, local sports, local news, etc.) selected by the caller. Once the instruction has been issued  1648  by the information collection logic  1522  ( FIG. 15A ), the information server  803  receives, in step  1650 , the instruction, and obtains, in step  1652 , the information associated with the specific geographical location. The obtained  1654  information is then relayed, in step  1654 , to the PSTN caller computer system  1405 , which receives, in step  1656 , the location information through the interface  1512  ( FIG. 15A ) and displays, in step  1658 , the information for the caller using the display unit  1526  ( FIG. 15A ). 
         [0084]    During this time, the call connection process continues in  FIG. 16C . Once the continue instruction has been received  1616  by the caller SSP  603 , the caller SSP  603  issues, in step  1662 , a connection request to the callee SSP  609 . The callee SSP  609  receives, in step  1664 , the connection request, which also includes the telephone number of the PSTN caller telephone  1403 . The callee SSP  609  issues, in step  1666 , a query to the SCP  605  using the telephone number of the PSTN caller telephone  1403 , and the query is received, in step  1668 , by the SCP  605 . The SCP  605  then instructs, in step  1670 , the callee SSP to continue the call processing, and also issues, in step  1678 , an instruction to the location server  1407  for a geographical location that correlates to the telephone number of the PSTN caller telephone  1403 . The callee SSP  609  receives, in step  1672 , the continue instruction from the SCP  605 , and accepts, in step  1674 , the connection request, thereby connecting, in step  1676 , the telephone call between the PSTN caller telephone  1403  and the PSTN callee telephone  1413 . 
         [0085]    While the call is being connected by the callee SSP  609 , the location server  1407  receives, in step  1680 , the instruction issued  1678  by the SCP  605 . Upon receiving  1680  the instruction, the location server  1407  determines, in step  1682 , whether or not the callee is logged on at a PSTN callee computer system  1415 . If it is determined  1682  that the callee is not logged on, then the data retrieval process ends, in step  1684 . If, however, it is determined  1682  that the callee is logged on, then the geographical location retrieval process continues in  FIG. 16D . 
         [0086]      FIG. 16D  is a flowchart showing one embodiment of the geographical information retrieval process as seen from the perspective of the PSTN callee. Once the location server  1407  has determined  1682  that a callee is logged on to a PSTN callee computer system  1415 , then the location server  1407  correlates, in step  1628 , the telephone number of the PSTN caller telephone  1403  to a specific geographical location. In one embodiment, this may be done using a lookup table or another database that has telephone numbers correlated to geographical locations. Since databases correlating geographical locations with telephone numbers are well-known in the art, further discussion of the correlating of geographical locations with telephone numbers is omitted here. Once a geographical location has been correlated to the telephone number of the PSTN caller telephone  1403 , the geographical location is relayed, in step  1630 , by the location server  1407  to the PSTN callee computer system  1415 . The PSTY callee computer system  1415  receives, in step  1632 , the geographical location using geographical location logic  1502  ( FIG. 15B ), and issues, in step  1634 , an instruction for information associated with the geographical location using information collection logic  1522  ( FIG. 15B ). Since, in a preferred embodiment, the process is executed by the PSTN callee computer system  1415  of  FIG. 15B , the PSTN callee computer system  1415  already has a list of selected items  1528  ( FIG. 15B ) related to a geographical location, which the callee desires to collect. Hence, in the preferred embodiment, the issued  1634  instruction includes the list of items (e.g., local time, local weather, local sports, local news, etc.) selected by the callee. Once the instruction has been issued  1634  by the information collection logic  1522  ( FIG. 15B ), the information server  803  receives, in step  1636 , the instruction, and obtains, in step  1686 , the information associated with the specific geographical location. The obtained  1686  information is then relayed, in step  1688 , to the PSTN callee computer system  1415 , which receives, in step  1690 , the location information through the interface  1512  ( FIG. 15B ) and displays, in step  1692 , the information for the callee using the display unit  1526  ( FIG. 15B ). 
         [0087]    The geographical location retrieval logic  902  ( FIGS. 9A and 9B ), the Internet telephony logic  930  ( FIGS. 9A and 9B ), the information collection logic  922 ,  1522  ( FIGS. 9A ,  9 R,  15 A, and  15 B), and the geographical location logic  1502  ( FIGS. 15A and 15B ) of the present invention can be implemented in hardware, software, firmware, or a combination thereof In the preferred embodiment(s), the geographical location retrieval logic  902  ( FIGS. 9A and 9B ), the Internet telephony logic  930  ( FIGS. 9A and 9B ), the information collection logic  922 ,  1522  ( FIGS. 9A ,  9 B,  15 A, and  15 B), and the geographical location logic  1502  ( FIGS. 15A and 15B ) is implemented in software or firmware that is stored in a memory and that is executed by a suitable instruction execution system. If implemented in hardware, as in an alternative embodiment, the geographical location retrieval logic  902  ( FIGS. 9A and 9B ), the Internet telephony logic  930  ( FIGS. 9A and 9B ), the information collection logic  922 ,  1522  ( FIGS. 9A ,  9 B,  15 A, and  15 B), and the geographical location logic  1502  ( FIGS. 15A and 15B ) can be implemented with any or a combination of the following technologies, which are all well known in the art: a discrete logic circuit(s) having logic gates for implementing logic functions upon data signals, an application specific integrated circuit (ASIC) having appropriate combinational logic gates, a programmable gate array(s) (PGA), a field programmable gate array (FPGA), etc. 
         [0088]    Any process descriptions or blocks in flow charts should be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps in the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention. Although an exemplary embodiment of the present invention has been shown and described, it will be apparent to those of ordinary skill in the art that a number of changes, modifications, or alterations to the invention as described may be made, none of which depart from the spirit of the present invention. For example, while specific SIP embodiments have been shown to better illustrate several aspects of the invention, it will be clear to one of ordinary skill in the art that the above-described method may be implemented in any Internet telephony system. All such changes, modifications, and alterations should therefore be seen as within the scope of the present invention.