Abstract:
Calling party identification announcement service (CPIAS) provides an announcement of the caller&#39;s name to a called party, so that the called party may accept of reject a call. This invention relates to arrangements for providing CPIAS using centralized announcement synthesis apparatus, under the control of a data base (in accordance with the principles of intelligent networks), within the basic call processing arrangements of the public switched telephone network, without requiring users of the services to have two telephone numbers. Billing entries for the use of the announcement service are made under the control of the terminating switch so that these entries can be readily combined with other billing entries for the called party in order to generate a bill for that party.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation in-part of an application by D. A. Frech, J. B. Reid, A. J. Roug and T. J. Scale entitled, “Calling Party Identification Announcement Service”, Ser. No. 08/686,001, filed Jul. 25, 1996, now U.S. Pat. No. 5,729,992, an application assigned to the same assignee as the present application. 
    
    
     TECHNICAL FIELD 
     This invention relates to arrangements for providing an announcement of the name or telephone number of a caller to a called customer. 
     PROBLEM 
     Calling number and calling name identification is a popular service. The called party sees a display of the calling number or, more recently, the listed name of the calling party. This permits the called party to accept or reject the call. 
     A disadvantage of regular calling number/name identification is that it requires special equipment to display the number or name at any receiving telephone station. This disadvantage is overcome in accordance with the teachings of U.S. Pat. No. 4,899,358 (the &#39;358 patent) which discloses arrangements for announcing a name or number for an incoming call, and U.S. Pat. No. 5,007,076 (the &#39;076 patent) which discloses arrangements for announcing a name or number for a waiting call to a party who has call waiting service. The announcement is receivable on any telephone instrument without requiring the special display equipment. 
     The disadvantage of the arrangements disclosed in the &#39;358 and &#39;076 patents is that there is disclosed no fully satisfactory arrangement for receiving the announcement from a source outside the terminating switch for incoming calls. Since the speech synthesis apparatus is expensive, especially on a per announcement circuit if the group of synthesized announcement circuits is small, it is highly desirable to centralize the synthesized announcement equipment at a service node to serve a plurality of terminating switches. 
     A further problem is that if the synthesized announcement circuits are remote from the terminating switch, the called party should be billed for the use of the public switched network for accessing the synthesized announcement circuits and for the use of the accessing network connection during the call. This presents an unusual billing problem since both the calling and called parties are billed for different parts of the call. If all billing were performed in the usual way, by preparing announcement billing records at the service node, i.e., the point of origination of the added connection, a severe coordination problem is encountered because the service node billing records must be combined with the usual subscriber billing records at the terminating switch. 
     Another problem associated with the use of a service node to supply the synthesized announcement is that if the service is provided in a straightforward way, an additional directory number must be assigned to each subscriber for the announcement service. This special directory number is used for making the connection from the service node to the called party; otherwise, the terminating switch, on receiving a call from the service node, would attempt to re-forward this call to the service node. While the &#39;076 patent, which only treats call waiting calls gets around this requirement because call waiting can be provisioned to have a higher precedence than call forwarding, this solution does not work for incoming calls. The use of large numbers of additional telephone numbers is highly undesirable. 
     Another problem associated with the service is that there are some customers who do not wish to have their name announced and other customers who wish to substitute a pre-recorded announcement or a new announcement for an announcement of their name. 
     SOLUTION 
     The above problems are solved and an advance is made over the teaching of the prior art in accordance with applicants&#39; invention for providing calling party identification announcement service (CPIAS), wherein upon receipt of a call to a party having announcement service, the call is forwarded, in response to instructions obtained from a data base, using a single special number or route index for forwarding calls from the terminating switch, to a centralized service circuit node/intelligent peripheral (SCN/IP) at some point for providing a synthesized announcement; the SCN/IP at some point queries a data base with the received calling directory number (typically obtained by automatic number identification ANI) in order to determine the text version of the calling customer&#39;s name; this text version is returned to the SCN/IP and will be used for synthesizing subsequent announcement to the called party; the SCN/IP, in response to instructions from a data base, originates an outgoing call via the terminating switch to the called party, a call which is recognized by the data base in a subsequent query from the terminating switch as originating from the SCN/IP and therefore not to forwarded but to be terminated to the called party; when the called station goes off hook, the SCN/IP plays a synthesized announcement of the caller&#39;s name, and waits for a signal indicating acceptance or rejection of the call; when the called station signals to the SCN/IP that the called party wishes to answer the call, the SCN/IP sends an indication to the terminating switch that the called station is to be connected directly to the calling station and the connection to the SCN/IP is to be dropped; billing for use of the SCN/IP and connections thereto is performed at the terminating office. Advantageously this arrangement allows the calling announcement service to be offered to parties without using any extra telephone numbers. Advantageously, this arrangement allows the billing for the basic call to be handled for the calling party at the originating switch, and allows the called party to be billed at the terminating switch which charges the called party for the use of the SCN/IP and the transmission facilities for accessing the SCN/IP as well as for the data base query to determine the calling party&#39;s textual name. Advantageously, this arrangement allows the service to be provided flexibly, using a data base, in accordance with the principles of intelligent network operation. In accordance with one feature of applicants&#39; invention, a query to a data base (a service control point, SCP) is used to distinguish between the incoming call (which is to be forwarded to the service node) and the call from the service node to the terminating switch (which is to be terminated to the called party); the data base (SCP) recognizes the origination number used by the service node to distinguish incoming calls from service node originated calls. Advantageously, this arrangement avoids the need for two telephone numbers for the customers who have CPIAS. 
     In accordance with one feature of applicants&#39; invention, the connection between the terminating switch and the SCN/IP is an Integrated Services Digital Network (ISDN) connection wherein the two legs that are connected to the service node are on different call appearances of one B-channel. This simplifies the process of dropping the connection to the service node and bridging the incoming call connection to the terminating party; this process is accomplished by sending a transfer request command to the terminating switch requesting that the two call appearances be merged and that the B-channel be disconnected. 
     In accordance with another feature of applicant&#39;s invention, a pre-recorded announcement is substituted for the caller&#39;s name. This is a service that is likely to be especially popular for vendors who are afraid of being screened before the called party has a chance to hear what the call is all about. 
     In general, the announcement need not be of the caller&#39;s name, but can be any other selected characteristic such as the originating city, state or area code. Advantageously, such an announcement may prompt the called party to recognize that the call is a long distance call, possibly from an area in which the called party is interested. 
     In accordance with another feature of applicants&#39; invention, the announcement can be generated by the caller for each call. If that announcement matches a previously accepted announcement, the call can be completed without an announcement to the called party. 
    
    
     BRIEF DESCRIPTION OF DRAWING 
     FIG. 1 is an overall block diagram illustrating a call with CPIAS; and 
     FIGS. 2-7 are flow charts illustrating a method of providing CPIAS. 
    
    
     DETAILED DESCRIPTION 
     FIG. 1 is a block diagram showing the main components of the arrangement for providing calling party identification announcement service (CPIAS). A telephone call is to be established between telephone stations  111  (the calling station) and  112  (the called station). Calling station  111  is connected to originating switching system (switch)  101  and called station  111  is connected to terminating switching system (switch)  102 . Terminating switch  102  is connected to SCN/IP  131  for providing the announcement. The overall system also includes a data base, called a switching control point (SCP)  121 , which can be accessed via a Signaling System  7  (SS 7 ) signaling network  141  connected to switch  102 , SCN/IP  131  and SCP  121 . CPIAS is provided under the control of the data base in accordance with the well known principles of intelligent networks. It is expected that the highly flexible service provided by intelligent network control of CPIAS will be a requirement. Switch  101  need not be connected to network  141  provided it has signaling arrangements permitting it to forward the calling number to switch  102 . When a call is received from calling station  111  by switch  101 , switch  101  initiates establishment of a connection, possibly via other switches, to switch  102  and passes to switch  102  the directory number of calling station  111 . Identification of the directory number of the calling party is generally obtained using the well-known technique of automatic number identification which obtains the caller&#39;s billing number; for those cases in which the billing number is not the same as the directory number, the originating switch derives the directory number of the calling line through a translation and forwards this to the terminating switch. The calling directory number is forwarded to switch  102  either over the link which will carry the call or by a common channel signaling (CCS) message via SS 7  network  141  from switch  101  to switch  102 . 
     In this description, the terms “establish a connection to a party” and “establish a connection to a telephone station” are used interchangeably. A switch establishes a connection to, and exchanges signals with, a telephone station. The party then uses the station to communicate, via another station, with another party. 
     Upon receipt of the call, including the caller&#39;s telephone number, switch  102  makes a translation of the called directory number, which translation is augmented by data from SCP  121  as described hereinafter, and makes a determination that the call should be forwarded to SCN/IP  131 . Switch  102  then connects the call to SCN/IP  131  and forwards the calling directory number. SCN/IP  131  queries SCP  121  for instructions on processing the call. SCN/IP  131 , in response to the instructions, originates an outgoing call via switch  102  to the terminating telephone station  112 . 
     Upon receiving this second incoming call for terminating station  112 , switch  102  again makes an inquiry on how to process the call. This time, because the SCP recognizes that the call is from an SCN/IP, the SCP requests that the second call be allowed to terminate. When the called station answers, the answer signal is forwarded to the SCN/IP, which again asks for instructions from the SCP. The SCP responds with a textual version of the name of the caller (i.e., the name assigned to the calling telephone number); an identification of an instruction announcement (“You have received a call from [synthesized announcement of caller&#39;s name]; if you wish to accept, press 1, or if you wish to decline the call, press 2”); and instructions to play the announcement and the synthesized name to the called party. The SCN/IP synthesizes the announcement of the name and plays this announcement and the instruction announcement. After the called station has signaled an agreement to accept the call, the SCN/IP requests switch  102  to make a direct connection between telephone station  112  and the call connection between originating switch  101  and terminating switch  102  so that telephone stations  111  and  112  can communicate. 
     In accordance with one preferred embodiment of applicants&#39; invention, the connection between the terminating switch and the service node is an Integrated Services Digital Network (ISDN) connection, wherein the two legs ( 152  and  153 ) that are connected to the service node are on different call appearances of one B-channel. This simplifies the process of dropping the connection to the service node and bridging the incoming call connection to the terminating party; this is accomplished by sending a transfer request command to the terminating switch requesting that the two call appearances be merged and that the B-channel be disconnected. 
     In accordance with another feature of applicant&#39;s invention, a pre-recorded announcement is substituted for the caller&#39;s name. This is a service that is likely to be especially popular for vendors who are afraid of being screened before the called party has a change to hear what the call is all about. 
     In general, the announcement need not be of the caller&#39;s name, but can be any other selected characteristic such as the originating city, state or area code. Advantageously, such an announcement may prompt the called party to recognize that the call is a long distance call, possibly from an area in which the called arty is interest. 
     In accordance with another feature of applicants&#39; invention, the announcement can be generated by the caller for each call. If that announcement matches a previously accepted announcement, the call can be completed without an announcement to the called party. 
     Switch  102  and SCN/IP  131  are both operative under program control. Switch  102  includes processor means  103  for controlling the operation of the switch and for generating and receiving messages from SS 7  network  141 . Similarly, SCN/IP  131  includes processor means  132 , for controlling the operation of the SCN/IP and for generating and receiving messages from SS 7  network  142 . Processor means  103  and  132  each include a CPU (central processing unit) ( 105  and  134 , respectively) controlling the generating and receiving of signals and messages and for controlling the operation of the unit, the CPUs being under the control of programs  104  and  134 , respectively. Switch  102  and SCN/IP are connected by an ISDN connection. 
     The terminating switch does not know the type of service to be provided by the SCN/IP. In the case of CPIAS, the switch also does not know whether the announcement was actually provided to the called station. More generally, for any service provided by the SCN/IP, the switch does not know what SCN/IP resources were used. Therefore, the source of the information for making a billing entry for the called party is the SCN/IP and SCP not the terminating switch. The SCP supplies the information for the billing entry for the called party for the forwarded legs of the call ( 152 ,  153 ), and the SCN/IP supplies the confirmation that the forwarded leg was actually completed, in this case, that the synthesized announcement was actually delivered to the called party. 
     A more detailed description of the steps required to provide the calling number announcement service is provided in FIGS. 2-7. In the example of these Figures, a calling party (station  111 ) connected to switch  101  and having a telephone number 708-968-1000 dials the number 708-979-2000 which is the number of a called party (station  112 ) connected to switch  102 . The various steps are numbered for easy reference. 
     In step  1 , the caller dials the number 708-979-2000 into switch  101 , switch  101  routes the call to switch  102 , and prepares a billing record so that the originating telephone (whose number is 708-968-1000) will be billed for leg  151  of the call. (Leg  151  is that portion of the connection which connects the caller to the terminating switch  102 .) The billing will be from the time that the caller receives an answer signal. In step  2 , the call is routed to switch  102 . 
     In step  3 , the terminating switch  102  receives the called telephone number and makes a translation number. In doing so, the terminating office finds that the party having number 708-979-2000 is provided with a service that requires a query for details from SCP  121  if it finds the called station on-hook of (of CPIAS on call waiting) if the called party is busy on a call. Switch  102  recognizes the need for a query to the SCP to determine treatment of the call. In step  4 , the query is transmitted to SCP  121 . 
     In step  5 , the response message from the SCP to switch  102  request the switch to forward the call to the SCN/IP. In step  6 , switch  102  starts the billing of the leg of the call used for accessing the SCP/IP (leg  152 ) with the intent to charge the called customer for this leg of the call if the called customer answers. Details of the billing are provided in the response from the SCP. 
     In step  7 , the call is routed to the SCN/IP, which receives from switch  102  the telephone number of the called party and the telephone number of the calling party. 
     In step  8 , SCN/IP receives the call and recognizes the need to query the SCP to provide instructions and the text version of the calling party&#39;s name. In step  9 , the SCN/IP queries SCP  121  to provide instructions for processing the call. In step  10 , the SCP provides instructions to the SCN/IP to establish a new related call to the terminating telephone station  112 . 
     In this description, each query and each response is represented by one step. If the SCN/IP is relatively simple, multiple queries may be required at certain steps (for instance, steps  18  and  20 ) because the length of an appropriate message may be too long or because the SCN/IP may require step by step instructions. 
     Step  18  which follows Step  10  is executed next. In this step SCN/IP 131  requests the textual data identifying the caller using the caller&#39;s telephone number as the index for the request. Step  30 , which follows Step  18  is a test to determine whether there is announceable data for the caller&#39;s number and if there is an indication that the caller&#39;s announceable data is to be transmitted to the called party. If the answer to both of these questions is positive, then Step  11  is executed. 
     In step  11 , a new call from SCN/IP to switch  102 , over leg  153 , is originated, the call being directed to the terminating telephone (the telephone station whose number is 708-979-2000). In step  12 , receipt of this call triggers the same type of query as is generated in step  4 , except that the identity of the SCN/IP, the new originator, is also transmitted in this query. Switch  102  sends a message to the SCP indicating that there is a termination attempt from the SCN/IP to switch  102 . The SCP determines instructions based on the called directory number and the calling directory number and a directory number assigned to the SCN/IP. (The SCN/IP is accessed from switch  102  by use of a directory number which is the directory number of a trunk group or is a route index (an index for obtaining the identity of one or more trunk groups of a route) connecting the terminating switch and the SCN/IP so that any available trunk between switch  102  and SCN/IP may be used for this connection. The availability of a directory number or route index allows the connection to be established in a conventional way.) 
     The SCP can distinguish this incoming call from the original incoming call because it can identify an SCN/IP as the originator. Therefore, in step  13  the SCP responds by authorizing termination of the call from SCN/IP to the called party. 
     In step  14 , the called party is alerted (generally with a ringing signal or in the case of a call waiting situation, is provided with the call waiting signal) and in step  15  the called party answers (or in the case of call waiting situation provides the signal indicating the desire to hear the name of the caller of the waiting call). In step  16 , billing for the call from SCN/IP to the called party (leg  152 , leg  153  and the use of the SCN/IP and the SCP) begins in the terminating switch. In step  17  the answer signal is forwarded to the SCN/IP. 
     Step  19  follows Step  17 . In step  19 , SCP  121  determines the textual data and data for identifying an announcement (e.g., “press 1 to accept, 2 to decline the call”) to the called party. In step  20 , SCP  121  returns a message to the SCN/IP, containing the textual data and the identification of the instruction announcement. In step  21 , the SCN/IP synthesizes an announcement of the name, or other announceable data or plays a recording of such announceable data. 
     In step  22  the called party presses 1 to indicate a willingness to accept the call. In step  23 , the SCN/IP again communicates with the SCP in order to receive further instructions on how to treat the call. The instructions, i.e., to request a transfer of the call, are furnished by the SCP in step  24 . In step  25 , the SCN/IP sends a signal to switch  102  to directly connect leg  151  of the call to the called party&#39;s line for connection to the called station and disconnects the two legs  152  and  153  between the SCN/IP and switch  102 . This allows the two parties to talk (step  27 ), and allows switch  101  to start billing for the call. When either subscriber disconnects (step  28 ) the final billing entry for the caller for the use of leg  151  is prepared (step  29 ) by switch  101  and for the use of SCN/IP and SCP, and, perhaps legs  152  and  153 , is prepared by switch  102 . 
     If the result of Test  30  is negative, then the SCN/IP requests the caller to record an announcement (Step  31 ). The caller records an announcement (Step  32 ). Test  33  then is used to determine whether the announcement is equivalent to a previously accepted announcement. This test is performed in the SCN/IP using speech recognition techniques. If the result of Test  33  is positive, then the called customer is alerted in order to complete the call (Step  34 ). If the result of Test  33  is negative, then Steps  35 - 41  (equivalent to Steps  11 - 17 ) are executed and Steps  42  and  43  equivalent to Steps  21  and  22  are executed. The SCN/IP saves the announcement which led to the acceptance (Step  44 ) (for use in Test  33  of subsequent calls) and Steps  23 - 29  are executed. 
     In alternative embodiments, a caller may record a message (such as his/her name), and this would then be the message that is played to the called party. This message can be sent along with an index of the message to the SCN/IP. If, after playing that message to a particular called party with CPIAS, that called party accepts, subsequent calls from that caller to that called party can be completed without playing the message; if an index has been transmitted, the index can be used directly and the SCN/IP need not perform speech matching. The called party can clear a particular caller from the automatic accept list by dialing a special code after receiving a call from that (previously accepted) caller. 
     In accordance with an alternative embodiment of applicant&#39;s invention, the SCN/IP can be provided with greater autonomy and make fewer requests for direction from the SCP. In this alternate scenario, the SCN/IP does not require additional information from the SCP after step  10 , because it has received and stored all the required information about the caller, called party and service. Thus, all the subsequent steps of querying the SCP by the SCN/IP are eliminated: these include steps  18 - 20  and  23 - 24 . The equivalent of the queries is simply an access of memory in the SCN/IP to obtain the information previously stored. 
     In alternative arrangements, the SCN/IP and SCP can be interconnected via protocols and data network arrangements other than the SS 7  of applicant&#39;s preferred embodiment. 
     FIGS. 2-7 illustrate the method for an incoming call. The method for a waiting call is essentially the same, except that: switch  102  responds to the waiting call even though the called party is busy on another call; the called party responds to a call waiting signal instead of a ringing signal; if the called party decides to accept the waiting call, the waiting call is connected and the original call is placed on hold, and thereafter, the called party can switch between the original call and the waiting call by flashing the switch hook. 
     While in the example of this preferred embodiment, a single data base (SCP) is used, in other applications it may be desirable to use different data bases for different functions; for example, it may be desirable to use a different data base for obtaining the text version of the calling party&#39;s name. 
     Other arrangements will be apparent to those of ordinary skill in the art. This invention is therefore only limited by the claims attached hereto.