SYSTEM AND HETQPQ PE L AMADA PE RfiC ES AUTOMATIC TECHNICAL FIELD This invention relates in general to communication switching systems and more particularly to a system and method for providing an automatic return call. BACKGROUND Several telephone companies and some customer service teams now provide an automatic callback service that allows a calling party to receive an automatic return call when the calling party dials an even number and receives a call. busy signal or a ringing or bell-without-answer signal.
The various ways in which these services are provided are discussed below. An automatic return call for a busy condition is often achieved by having the network redial the even number of calls at regular intervals for a predetermined period of time (otherwise as "repeated dialing") until the network finds that the called party number or recipient is hung. Once a hung condition is detected, the network dials the calling party number and announces that it is about to direct a call to the called party number in satisfaction of the calling party's pending answer call request. For REF: 23750 example, the network can repeat dialing to the called party number every ten minutes for a period of up to one hour. However, often attempts to detect hanging condition are successful or fail; the called party number may be hung during the interval between the call and busy attempts at the time of each call attempt. Although increasing the incidence of call attempts and the period in which these attempts are made may increase the likelihood of a successful call termination, a well-known disadvantage in doing so is the impact on the network of attempts to call without repeated success - that is, increased congestion and reduced traffic handling capacity. An example of an automatic callback service for bell-without-answer that also uses repeated dialing is "Complete International Call". The use of repeated marking in the context of campanazo-sin-respuesta suffers from serious disadvantages in addition to those previously mentioned. For example, unlike the case of repeated dialing when the telephone is busy, the network would not simply try to detect hanging condition but instead would be dialing the called party number in the hope that the calling party would answer the call, in this way, the network would not be given the opportunity, as in the case of repeated dialing when the telephone is busy, dialing the called party number to confirm that the calling party is available and still wishes to complete the call . When the call is answered, the called party is asked if he would like to receive a call addressed to the party that originally called him. Unfortunately, there is no guarantee that the calling party is still available to take the call. Therefore, the repeated dialing process may have to continue (for example every ten minutes for up to an hour) even at the risk of offending the calling party who may have to repeatedly respond to the telephone only to find that the party Call is still not available to complete the call. In addition, the extensive use of answering machines makes repeated marking impractical for a bell-without-response condition. A second callback service for when the phone is busy, is currently offered as one of the features of Local Area Location Services (5SESS). This service can provide an automatic return call when a calling party finds a busy signal and is provided through a network of switches that use SS7 signaling between them for out-of-band call control. Once a calling party invokes this feature, the terminating switch "camps" on the line of the calling party until the calling party hangs up. When a hung condition is detected, the terminating switch signals the originating switch to send a call to the calling party. If the calling party answers the phone, a call is routed to the called party and the two calls are merged. However, neither the 5ESS LASS automatic callback feature nor any other 5ESS LASS feature provides an automatic return response call when a calling party encounters a bell-without-answer condition. COMPENDIUM OF THE INVENTION The previously identified problems are solved and a technical advance in the technique is achieved in providing a system and method for automatic callback with a bell-without-answer condition without having to resort to the network executing repeated dialing of the called party number. An exemplary system for providing an automatic return call when a calling subscriber encounters a bell-without-answer condition includes: a switching network having switches to direct telephone calls; the switching network comprises a first source switching node coupled to a first source telephone call location, which corresponds to a calling party number and a 'terminating switch node coupled to a destination telephone call location. , corresponding to the called party number, a database coupled to a terminating switched node for storing calling party number calling activity; a processor coupled to the terminating switching node to periodically process the calling activity, to determine a better time in calling the calling party number and providing a terminating switching node with the best time to call the called party number; a signaling network that couples switches in the switching network with each other, to direct the best time to call the calling party number to the originating switching node; and an auxiliary coupled to the originating switching node, to receive an automatic callback request from the calling party number and initiate the automatic return call to the calling party number at the best time to call the called number. Other and additional aspects of the present invention will be apparent during the course of the following description and by reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWING Figure 1 is a block diagram illustrating one embodiment of the present invention. PRSCRTP TON nfiTAI.I.AnA Now with reference to the drawings, Figure 1 illustrates one embodiment of the present invention. As illustrated in Figure 1, a calling party 2 and a party called 4, are coupled to an intermediate switching network by local exchange carrier end stations (6, 8). The switching network comprises an originating switching node (OSN) 10 and a terminating switching node (TSN) 12. End-to-end SS7 connectivity 20 for transmitting out-of-band calling activity between the LECs ( 6, 8) and the communication network is considered. In out-of-band call activity it includes call origin information such as Calling Part Number ("Calling_PN") and / or Automatic Identification Number (ANI). It also includes call destination information such as Calling Part Number ("Calling_PN"). Also illustrated in Figure 1, OSN 10 coupled to an auxiliary 14 (an Interactive Voice Response) and TSN 12 is coupled to both a database 16 and a processor 18. An exemplary call flow used in conjunction with the embodiment of Figure 1 will now be described, wherein a calling party 2 directs a telephone call, obtains a "bell-without-answer" signal, and invokes the automatic return call feature of the present invention. The calling party 2 picks up and gets a dial tone. The calling party 2 then dials the telephone number of the party with whom you wish to communicate. The source LEC 6 creates an Initial Address Message (IAM) that contains Calling_PN, Called_PN and ANI. The IAM is directed to the terminating LEC through the switching network. The terminating LEC 8 marks the telephone associated with the Called_PN and sends a Full Address Message (ACM) through the switching network to the originating LEC 6. In the case that a bell-without-response condition is encountered, TSN 12, after a predetermined number of unanswered bells, transmits "a Better Time to Call" called party 4 to OSN 10. The Best Calling Time of call part 4 is stored in TSN 12, which also is the billing switch of the calling party 4. Each time the called party 4 conducts an outgoing call, the TSN 12 transmits information regarding the call to the database 16. This information includes the called party number 4, the number dialed by the called party 4 and the start and end times associated with the call. In other words, the database 16 stores information with respect to the calling activity of the called party 4. Furthermore, the calling activity of the called party 4 does not require to be limited to information regarding the outgoing calls of the called party 4, It can include information regarding the incoming calls of the called party 4 equally. On a periodic basis, for example once a month, the processor 18 interrogates the database 16 for the calling activity of the called party 4 and performs a pattern analysis well known to those with ordinary skill in the art, for derive the best time to call the called party 4. The best time to call is then updated in the TSN 12. Data available from the LEC of the called party 8 can be used together with the available data of the TSN 12 to derive the Best Time to Call The Best Time to Call may include, for example, a better exact time (such as 7:00 PM) which corresponds to the highest probability of availability of the called party 4 for any instant in time. It can also include a "window" of time (for example, 6:00 PM to 8:00 PM) that corresponds to a less acceptable probability of default availability. Also, the part called 4 can be provided with the option to exceed your best time to call. For example, the called party 4 may wish to modify its best time to call, to reflect recent changes in its program; changes too recent to have been detected by the processor 18. In the interest of maintaining privacy, the called party 4 can also provide with the option to completely avoid providing their best time for calling the called parties. Once the called party 2 has addressed a call to the called party number 4, and has received a bell-without-answer signal, the calling party 2 can enter a feature code from the keypad numeric keypad from your phone (for example * 68) to request an automatic return call. The originating LEC 6 sends the message * 68 to the OSN 10. At that point the OSN establishes a call connection to an auxiliary 14. It can be achieved when formulating a Q.931 SETUP message and transmitting it to the auxiliary 14 via the D-channel of a primary rate interface (PRI) 22. This message includes both the IAM and the Best Call Time, which the auxiliary 14 stores for future reference as described below. Although the best call time that has been transmitted to OSN 10 was previously described, after a predetermined number of unanswered bells, the best time to call can be transmitted alternately to OSN 10, after the calling party 2 has entered the characteristic code of automatic return call (* 68). The auxiliary 14 then requests the OSN 10 to establish a voice path between the calling party 2 and the auxiliary 14 through the B channel of the PRI 22. When the calling party 2 answers the telephone, the OSN 10 receives a message from Answer (ANM) and in response to the ANM, the auxiliary 14 plays a pre-recorded announcement informing the calling party 2 of the Best Time to Call the called party 4. The Best Calling Time directed to the calling party 2 may include a better exact time and / or a time window. For purposes of illustration, we first discuss the case where only a better exact time is described to the calling party 2.
The auxiliary 14 plays a pre-recorded announcement, signaling the calling party 2 to provide a time in which the calling party 2 will most likely be available to receive an automatic return call. At this point, the calling party 2 can already hang up or respond to the signal. The latter involves either passing a predefined value to the best exact time of the called party 4 or providing a time by itself. If the calling party 2 passes a predefined value of the best exact time of the called party 4 or provides a time (7:45 PM) that falls within the time window of the called party 4 (6:00 PM to 8: 00 PM) (even though this window has not described the calling party 2) the auxiliary 1 informs the calling party 2 that an automatic return call will be made to the requested time. The calling party 2 then hangs up and the usual release and clear release messages are exchanged between the LECs (6,8) by the OSN 10 and the TSN 12. If the calling party 2 provides a time (5:00 PM) which is outside the time window of the called party 4, the auxiliary 14 informs the calling party 2 that the automatic return call will not be made due to insufficient information regarding the availability of the called party 4 during the time of return call requested. At that point, the calling party 2 can again be provided with an option to take a predefined value at the best exact time of the calling party 4 by providing a yes time. After a predetermined number of unsuccessful attempts to provide a time that is within the window of the called party 4, the auxiliary 14 will inform the called party 2 that an automatic return call will not be possible and will end the call. However, if the calling party 2 passes a predefined value at the best exact time of the called party 4, or provides a time that is within the time window of the called party 4, the auxiliary 14 informs the calling party 2, that an automatic return call will be made to the requested time. The calling party 2 then hangs up and the usual release and clear release messages are exchanged between LECs (6,8) via OSN 10 and TSN 12. As indicated above, instead of just describing a better exact time, the auxiliary 14 on the other hand can describe a time window or both a time window and a better exact time to the calling party 2. The primary difference between these alternatives and the case where only a better exact time is described, is that the calling party 2 is provided with the availability window of the called party 4 and thus can respond more intelligently to the announcement of the auxiliary 14 for a time in which the calling party 2 would probably be available to receive a call back automatic In addition, the auxiliary 14 while signaling the calling party 2 of this information, can further educate the calling party 2 by announcing that only times within the time window of the called party 4 will be accepted. At the requested time of the calling party 2, the auxiliary 14 signals the OSN 10 to establish a connection (data and voice over the D channel and the B channel of the PRI, respectively) between the auxiliary 14 and the calling party 2 for purposes to satisfy the callback request of the calling party 2. This is achieved by the auxiliary 14 transmitting the Calling_PN portion of the IAM previously stored to OSN 10. The OSN 10 generates an IAM, transmits the IAM to the LEC 6 and receive an ACM in return. When the calling party 2 answers the telephone, the OSN 10 receives an ANM and responds to the ANM, the auxiliary 14 plays a pre-recorded announcement indicating that the network is directing a telephone call with automatic callback for bell-without-response to the Called_PN If the calling party 2 wishes to complete the call, she will be instructed to provide "1" from the keypad pad of her telephone. If the calling party 2 decides not to complete the call, you will be instructed to provide "2" of it. In the event that the calling party 2 provides "1", the auxiliary 14 transmits the Called_PN portion of the previously stored IAM to OSN 10. The OSN 10 generates an IAM and directs a call to the Called_PN via the TSN 12 and the appropriate LEC 8. Again, OSN 10 receives the usual ACM. When the calling party 4 answers the telephone, OSN 10 receives the usual ANM. In that case, the auxiliary 14 fuses the two calls (one to the Calling_PN and the other to the Called_PN) in OSN 10, and the call is completed as an Old Simple Normal Telephone Service Call (POTS). The main features and advantages of the present invention are apparent from the detailed specification and thus it is intended by the appended claims to cover all of these characteristics and advantages of the invention that fall within the spirit and actual scope of the present invention. In addition, since numerous modifications and variations will readily occur to those skilled in the art, it is not desired that the present invention be limited to the exact construction and operation illustrated and described herein, and accordingly, all equivalent modifications. Conventions that can be appealed, are intended to fall within the scope of the claims. For example, while another description has focused on dividing an automatic return call for a calling party that finds a bell-without-answer condition in an inter-LATA switching network, the previous description is sufficient to allow a person with ordinary dexterity in the art which readily applies the present invention to provide an automatic answering call or automatic return for bell-without-response on an intra-LATA basis. Thus, although the preferred embodiment illustrates the present invention implemented using a plurality of switches, it will be appreciated by a person of ordinary skill in the art that it can be implemented in a single switch environment. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention. Having described the invention as above, property is claimed as contained in the following: