MXPA00000406A - System and method for providing a busy signal to a communication - Google Patents

Abstract

A system and method to provide a busy signal to a communication without a terminating network element providing answer supervision and without the originating caller associated with the communication being charged for the communication. A communication that has been forwarded over an integrated services digital network (ISDN) interface connection from a central office to a terminating network element for further routing of the communication to a terminating unit is accepted at the terminating network element and an ISDN interface connection is made, but answer supervision with respect to the communication is not provided. Upon a determination that the terminating unit to which the communication would otherwise be forwarded is busy, the terminating network element provides an ISDN release complete message with respect to the communication to the central office. The ISDN release complete message instructs the central office to play a busy signal to the communication. The terminating network element also releases the ISDN interface connection to the communication. In response to receipt of the ISDN release complete message from the terminating network element, the central office plays a busy signal to the communication.

Description

SYSTEM AND METHOD FOR PROVIDING AN OCCUPIED SIGN IN A COMMUNICATION FIELD OF THE INVENTION The present invention relates, in a general way, to the field of telecommunications and, more particularly, relates to the field of the provision of busy signal in a communication that, otherwise, would have been routed to connect with a terminating unit.

BACKGROUND OF THE INVENTION The provision of improved telecommunication services by the service providers has given rise to some problematic issues with respect to the implementation of these services and the billing thereof to the clients. These issues have arisen in the context of certain call transmission services and other similar telecommunication services that provide enhanced services that make use of a terminating network element such as a smart peripheral (IP intelligent peripheral) or a node of service circuit. These types of services have been implemented normally so that a communication can be routed from an originator of P1712 / 99MX called through a telecommunications network and can be terminated later in the termination network element. The termination network element may then provide additional routing of the communication to a terminating unit or provide another call processing, as appropriate. This implementation of routing a communication to or through a termination network element works well when the terminating unit or a call rescue location, such as a voice mail service, is available for connection to communication . This implementation has a disadvantage when the terminating unit is busy and there is no call rescue location for communication connection. In this case, the terminating network element must provide communication response monitoring to provide a busy signal to the communication. With the provision of response monitoring, the communication connection is considered terminated for the terminating network element for billing purposes. The originator of the call would be billed for the communication as if it had been answered. The cost of this billing can be significant if a charge is made for the connection of the communication to the termination network element.

P1712 / 99MX A telecommunications service provider must take steps to ensure that these invoices for a call to a busy termination unit do not occur. In accordance with state and federal telecommunications public service regulations, in general, a call originator can not be billed for a call to a busy termination unit. In this manner, two unsatisfactory solutions have been contemplated to overcome the disadvantage that a call originator is billed improperly when a communication to a busy termination unit is answered through the provision of a busy signal by means of a termination network element. The first unsatisfactory solution is that a service provider that has faced an improved service that has this disadvantage, has eliminated this enhanced service from its portfolio of enhanced services offered to subscribers. The unsatisfactory nature of this first solution is quickly made evident by the fact that a service provider wishes to offer as many varied enhanced services as possible in order to remain competitive with other service providers. The second unsatisfactory solution is that the originator of the call is not provided with any indication that the terminating unit P1712 / 99MX is busy. On the contrary, the originator of the call continues to hear the ringing until it tires of the noise. With continuous ringing, the call originator is not billed for a communication that was never connected to the appropriate terminating unit. Continuous ringing is an unsatisfactory solution for most subscribers for several different reasons. Business owners are dissatisfied with this solution because this may leave the wrong impression on customers. A customer who calls a business and who hears continuous ringing can deduce that the business is not interested in providing a service to customers who call the business by phone. Business owners are especially frustrated by this as it is unlikely that customers who have gotten by telephone, that is, those customers who do not have an association or previous affiliation with the businesses, will return a phone call to a business that does not seem to be answer your phone. In the private sector, a subscriber may be dissatisfied with the continuous ringing solution because it causes concern with respect to the people associated with the terminating unit. For example, a person who telephones one of their sick or elderly parents may be concerned about the fact that the telephone line keeps ringing when this person P1712 / 99MX is relatively sure that the sick or elderly parent is present in the place where the telephone is located. Therefore, there is a need in this area for a solution to the disadvantage of implementation, in cases where a communication is routed to or through a terminating network element, in order to provide improved communication services, where the termination unit is busy and there is no call rescue location for the communication connection, and where the provision of a busy signal by the terminating network element results in a charge to the originator of the call, even when the termination unit is busy. There is also a need in the art for a solution to the disadvantage mentioned above, which allows a service provider to retain the enhanced services using this implementation in its portfolio of enhanced services available for subscription. There is an additional need in the art of a solution to the disadvantage mentioned in the foregoing, which does not provide continuous ringing to the originator of the call as the solution to the disadvantage.

P1712 / 99MX SUMMARY OF THE PRESENT INVENTION Generally established, the present invention includes a system and method for providing a busy signal to a communication. without a terminating network element providing response monitoring and without the call originator receiving a communication charge. Advantageously, the present invention allows a communication to be routed to or through a termination network element to provide improved communication services. But if the termination unit to which the communication is destined is occupied and there is no call rescue location for communication, the present invention allows the service provider to retain in its portfolio of services the improved services with its implementation, providing a busy signal at no charge to the originator of the call. The provision of the busy signal for communication in these circumstances is a more satisfactory solution for subscribers than the continuous ringing provided by other solutions. Described more particularly, the present invention includes a system for providing a busy signal to a communication that has been transmitted over a connection in integrated services digital network interface (ISDN-Integrated P1712 / 99MX Services Digital Network)) from a central office to a termination network element. Generally, in this system, the communication has been transmitted to the terminating network element for additional routing of the communication to a terminating unit or for another call processing. In the preferred embodiment of the system, the termination network element is an intelligent peripheral (IP) or a service circuit node. The communication is accepted in the termination network element and an ISDN interface connection is made, but the response monitoring with respect to the communication, preferably, is not provided. In a determination that the termination unit to which the communication would otherwise be transmitted is occupied, the terminating network element provides a message regarding communication to the central office. In the preferred embodiment, this determination may also include a determination that no call rescue location is available or designated for routing the communication. Also in the preferred embodiment, this message from the terminating network element is a complete ISDN release message. The message instructs the central office to sound a busy signal for communication. The termination network element also releases the interface connection P1712 / 99MX ISDN for communication. In response to receiving the message from the terminating network element, the central office sounds a busy signal for communication. In this way, the call originator associated with the communication hears a busy signal. The present invention also provides a method for providing a busy signal to a communication, where the signal has been transmitted to the terminating network element. The busy signal is provided without the terminating network element providing response monitoring for communication and thus, without the call originator receiving a communication charge. In accordance with an exemplary embodiment of the method, communication is accepted over the ISDN interface connection in the terminating network element and an ISDN interface connection is established with respect to the communication by the terminating network element. In response to the acceptance of the communication, the terminating network element determines the additional routing of the communication. The terminating network element verifies whether the terminating unit is busy through the use of data messages between the terminating network element and a central office. Typically, this central office is the central office that serves the termination unit. If the P1712 / 99MX termination unit is busy, in the preferred method, the termination network element determines if there is a call rescue location designated for communication. If there is a designated call rescue location for communication, then the terminating network element routes the communication to the call rescue location and the method ends. Otherwise, the terminating network element provides a message to the central office serving the terminating network element. This message instructs the central office to sound a busy signal for communication. In the preferred method, this message is a complete ISDN release message. The termination network element also releases the ISDN interface connection to the communication. In response to receiving the message from the terminating network element, the central office sounds the busy signal for communication. In this way, the call originator associated with the communication hears a busy signal, but is not charged for the communication. Accordingly, it is an object of the present invention to provide a solution to the disadvantage of the implementation, in cases where a communication is routed to or through a termination network element, to provide improved services for the P1712 / 99MX communication, where the terminating unit is busy and there is no call rescue location for communication connection, and the provision of a busy signal by the termination network element results in a billing charge for the originator of the call even when the termination unit is busy. It is also an object of the present invention to provide a solution to the aforementioned disadvantage, which allows a service provider to retain in its portfolio of improved services available the enhanced services that this implementation uses. It is a further object of the present invention to provide a solution to the disadvantage mentioned above, by not providing continuous ringing for the call originator as the solution to the disadvantage. Other features and advantages of the present invention will be apparent to those skilled in the art from the following detailed description of exemplary embodiments, accompanied by the accompanying drawings, wherein the reference numbers refer to the parts and steps in the various views, consistently.

P1712 / 99MX BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram illustrating the preferred environment of the preferred embodiment of the present invention. Figure 2 is a flow chart of the call of the preferred embodiment of the present invention. Figure 3 is a flow chart of the stages of the preferred embodiment of the present invention.

DETAILED DESCRIPTION This detailed description provides a general description of the present invention and then provides a description of the preferred environment (Figure 1) and the operation of the exemplary embodiments of the present invention within that environment. The detailed description concludes with a more particular description of the present invention through the use of a call flow diagram (Figure 2) and a flow table (Figure 3). Generally described, the present invention includes a method and a system for providing a busy signal for a communication. Described more particularly, the present invention operates in connection with a communication that has been transmitted on a P1712 / 99MX Integrated Services Digital Network Interface (ISDN) connection from a central office to a terminating network element. Generally, the communication has been sent to the termination network element for additional routing of the communication to a terminating unit or for another call processing. The communication is accepted in the terminating network element and an ISDN interface connection is made, but no reply supervision is provided with respect to the communication. When a determination is made that the termination unit to which the communication would otherwise be transmitted is occupied, and that there is no designated call rescue location for the communication, the terminating network element provides a complete message of ISDN release with respect to communication to the central office. The complete ISDN release message instructs the central office to sound a busy signal to the communication. The terminating network element also releases the ISDN interface connection for communication. In response to receipt of the complete ISDN release message from the terminating network element, the central office sounds a busy signal for communication. Having generally described the present invention, there is now provided a P1712 / 99MX description of the preferred environment (Figure 1) and the operation of exemplary embodiments of the present invention in that environment. Figure 1 is a block diagram illustrating a telecommunications network 10 and, in particular, the typical interconnection of network elements such as those that may be present in the public switched telephone network (PSTN) and elements of the advanced intelligent network (AIN advanced intelligent network) of the same. Additional information regarding the telecommunication network 10 can be obtained from the commonly assigned patent to Weisser, U.S. Patent No. 5,430,719, which is incorporated herein by reference. The elements of Figure 1 are also used in Figure 2 to describe the call flow of the exemplary embodiments of the present invention. Referring to Figure 1, the present invention operates in connection with a communication located by a call originator that uses a telecommunication unit, such as the unit 18a and whose communication is routed in a conventional manner through the network 10 of telecommunications towards a termination network element such as, for example, the intelligent peripheral (IP) 39. Before a more detailed description of the present invention, it is provided P1712 / 99MX general information regarding the elements of the preferred environment. Figure 1 provides illustrations of various termination units commonly designated 18, as the unit 18a including a subscriber unit 18b and a transmitted termination unit 18d. Although telephones are illustrated as the pieces of equipment or terminating units in Figure 1, those skilled in the art will understand that these pieces include other telecommunication devices such as facsimile machines, computers, modems, etc. As noted, one of the illustrated telephones 18a is designed to correspond to the call originator (also referred to as "originating party of the call", "originator" or as "source"). Although in general reference is made to the call originator as if it were a person, those skilled in the art will understand that a call originator can be a device such as a facsimile machine, a computer, a modem, etc. As also noted, the present invention operates in connection with a "communication". The term "communication" is used here to include all messages or calls that can be exchanged between a call originator and a network element, terminating unit or person answering a call. As illustrated further in Figure 1, each P1712 / 99MX one of the termination units 18a, 18b and 18d is shown connected to a central office (A, B and D) 12a, 12b and 12d, by a plurality of respective lines 14a, 14b and 14d. A central office C is also illustrated. These central offices are preferably SSP switches (also referred to as "SSP" s). "SSP" is an acronym for the English term "service switching point", whose translation is service switching point. In general, an SSP includes intelligent network functionality that includes appropriate hardware and software so that, when a set of predetermined conditions is detected, the SSP initiates an activator for a predetermined state of a call in a subscriber directory number, generates the activator as an appropriate message to be sent by the telecommunications network and suspends the delivery of a call until the SSP receives a response from the network, which instructs the SSP to take some action. Still referring to Figure 1, the switches 12a, 12b, 12c and 12d are interconnected by a plurality of trunk circuits indicated 22 in Figure 1. These are the voice path trunks that interconnect the central offices to connect the communications . As will be understood by those skilled in the art, each of the central offices 12a-12d is connected to a P1712 / 99MX local signal transfer point (STP) 24 by means of the respective data links 26a, 26b, 26c and 26d. Also connected to the STP 24 by the data link 25, is the local service control point (SCP) 30. As is known to those skilled in the art, among the functions performed by the SCPs is the " maintenance of the network databases that are used to provide services and, in particular, to provide enhanced telecommunication services In addition, the SCPs include databases that identify particular service subscribers and the services that will correspond to these subscribers. All these network elements (SSPs, STPs and SCPs) operate in accordance with the well-known signaling protocol, which is referred to as the Signaling System 7 (SS7) protocol. data and calls as simple as possible, for each call a relatively small set of activators is defined, in the central offices. Advanced people is an event associated with a particular subscriber line that generates a packet to be sent to an SCP. The trigger causes the SCP to query its database in order to determine which enhanced call feature or service should be implemented for this P1712 / 99MX call in particular. The results of the database query are sent back to the central office from SCP 30 through the STP 24. The return package includes instructions for the central office about how to process the call. The instruction may be to take some special action as a result of a personalized call service or an improved feature. In response to receiving the message of the last type, the central office moves through its call states, collects the called digits and generates additional packets that are used to establish and route the call. Similar devices for routing calls between several local telephone exchange carriers are provided by the regional STPs (not shown and the regional SCPs (not shown). The illustrated telecommunication network 10 also includes a terminating network element and includes, in particular, an intelligent peripheral (IP) 39 as the termination network element shown in Figure 1. Those skilled in the art will be familiar with intelligent peripherals or service circuit nodes that are implemented, in general, by the same type of computers that the computer incorporates. service control point 30. In addition to the computing capacity and basic maintenance characteristics of P1712 / 99MX data, the intelligent peripheral (IP) 39 also includes dual tone multifrequency (DTMF) signal and speech recognition devices and speech synthesis devices. The intelligent peripheral (IP) 39 can be connected to other telecommunication network elements as necessary or appropriate. Smart peripherals, such as the smart peripheral 39, are used mainly when some service or enhanced feature requiring an audio connection to the call or the transfer of a significant amount of data for a call on a switched connection during or after a call. As shown in Figure 1, the intelligent peripheral (IP) 39 is normally connected to one or more (but usually only a few) central offices via an Integrated Service Digital Network (ISDN) 42 interface connection. Network), such as connection 42 between the intelligent peripheral (IP) 39 and the central office C 12c. Preferably, this ISDN interface connection 42 constitutes ISDN basic access interface (BRI) lines. In this way, an intelligent peripheral (IP) can be seen as an intelligent termination connected to an ISDN interface connection that can be used to provide special or enhanced services.

P1712 / 99MX Although the preferred embodiment of the present invention contemplates the use of an intelligent peripheral (IP) as the terminating network element, other devices can also be used as terminating network elements. These devices may include other service circuit nodes or service platforms with appropriate functionality. As noted, the present invention operates in connection with a communication located by a call originator and routed in a conventional manner through the telecommunications network 10 to a terminating network element, such as for example the intelligent peripheral (IP) 39 Normally, a communication is routed to an intelligent peripheral so that enhanced services can be provided in connection with communication. For example, enhanced call transmission services, such as the Flexible Call Transmission service (Flexible Cali Forwarding from BellSouth Corporation uses the characteristics of an intelligent peripheral (IP): To explain this example, it is assumed that the subscriber associated with the subscriber unit 18b has subscribed to the enhanced call transmission service. that all calls directed to the directory number associated with the subscriber unit 18 P1712 / 99MX are transmitted to the transmitted termination unit 18d. The information concerning this arrangement for the transmission of calls from this subscriber is stored in the intelligent peripheral (IP) 39. In accordance with this enhanced call transmission service, an activator is placed on the line associated with the subscriber unit 18b. The call flow of a communication addressed to the subscriber subscribing to the enhanced call transmission service eg emplificativo is now provided with reference to the telecommunications network 10 of Figure 1 and with respect to the call flow steps illustrated in the Figure 2. When the call originator 18a performs a communication for the subscriber's directory number, the communication is routed in a conventional manner over a voice path connection from the unit 18a that generates the call to its serving central office A 12a . (See step 1 of Figure 2 wherein the voice path connections are illustrated with solid lines and the data path connections are illustrated with interrupted lines). The communication is further routinely routed over a voice path connection from the central office A 12a through the network 10 as necessary, to the central office B 12b serving the unit.

P1712 / 99MX subscriber 18b. (See step 2 of Figure 2). As a result of the provision of an activator in the subscriber line, the central office B 12b makes a query through the STP 24 of SCP 30, looking for other instructions of call routing. SCP 30 consults the appropriate information in its subscriber database, notes that this subscriber has requested enhanced call forwarding services and provides (via STP 24) to the central office B 12b the instructions for routing the call to the subscriber. Intelligent peripheral (IP) 39. To route the communication to the intelligent peripheral (IP) 39, the central office B 12b routes the communication in a conventional manner over a voice path connection to the central office C 12c, which serves the peripheral intelligent (IP) 39. (See step 3 of Figure 2). Upon receiving the communication, the central office C 12c also routes the communication in a conventional manner over the ISDN interface connection 42 to the intelligent peripheral (IP) 39. (See step 4 of Figure 2). It should be understood that this communication is routed via a message trunk or voice channel establishment, but that a voice path is not terminated until response supervision is received. The communication is accepted in the terminating network element and an ISDN interface connection is made, but the P1712 / 99MX response monitoring with respect to communication, preferably, is not provided by the intelligent peripheral (IP) 39. In other words, no conventional message such as the Send Response message in the ISDN protocol is provided by the node service circuit 39 to the central office 12c. The ISDN response monitoring is retained to avoid charges to the client until the transmitted location ends the communication accepting the communication. The call originator 18a continues to hear the ringing. The Intelligent Peripheral (IP) 39 checks its database, tables or other appropriate information sources in a conventional way in order to determine what type of call processing can be applied to this communication. Based on the prior arrangement made by the subscriber in the example, the intelligent peripheral (IP) 39 determines that the communication is to be routed to the terminating unit 18d transmitted, which is served by the central office D 12d. Conventionally, the intelligent peripheral (IP) verifies the state of the terminating unit 18d transmitted by the exchange of data messages with the central office D serving the terminating unit 18d transmitted. (See steps 5-6 of Figure 2). As seen in Figure 2, the exchange of data message with the central office D 12d gives P1712 / 99MX results in a determination that the terminated terminating unit 18d is busy. In the preferred embodiment, this determination that the terminated terminating unit 18d is busy may also include a determination that no call rescue location is available or designated for routing the communication. This determination regarding the call rescue location can be carried out by the intelligent peripheral (IP) 39 consulting its sources of information with respect to this subscriber. Call rescue locations may include a facsimile mail or voice mail service, a location service or other services associated with the subscriber. In addition, a call rescue location may include another directory number to which the communication is to be routed. If there is a designated call rescue location for communication, then the intelligent peripheral (IP) routes the communication, preferably to the call rescue location or takes any other steps that are appropriate with respect to communication and location call rescue. Otherwise, the intelligent peripheral (IP) preferably proceeds as explained below, in relation to the provision of a busy signal for communication.

P1712 / 99MX Still referring to Figures 1 and 2, it is assumed that a determination has been made that the termination unit to which the communication would otherwise be transmitted is occupied and, as appropriate, has been made a determination that no call rescue location is designated for communication. The intelligent peripheral (IP) 39 provides a message regarding communication to the central office C 12d serving the intelligent peripheral (IP) 39. (See step 7 of Figure 2). In the preferred embodiment, this message from the terminating network element is a complete ISDN release message in accordance with the ISDN protocol with a specification that a busy signal is provided instead of a ring signal. This message may also be known as a complete release or release message. In particular, this message instructs the central office to sound a busy signal for communication. Upon receipt of this message, the central office C 12c sounds the busy signal for communication. (See step 8 of Figure 2). Advantageously, the effect of this message is that a busy signal is provided for the communication without the communication having been terminated in any way and, in particular, without the communication having been terminated in the P1712 / 99MX intelligent peripheral (IP) 39. The intelligent peripheral (IP) 39 also releases the ISDN interface connection with the communication. In this way, the originator associated with the communication listens to a busy signal and is not charged for the communication. In other words, the intelligent peripheral (IP) has, in accordance with the standard North American ISDN protocol Q.9.31, preferably four seconds to accept the communication. In this time frame of four seconds, the software in the intelligent peripheral (IP) begins to transfer the communication to the transmitted termination unit. If the intelligent peripheral (IP) receives the ring signaling that the transmitted terminating unit is not busy, the intelligent peripheral (IP) continues ringing to the transmitted terminating unit, sending the acceptance message of the call originator. However, if the intelligent peripheral (IP) receives a busy signal, then the complete release message is sent, which will cause a busy signal to be sounded for the originator of the call. In conclusion, the steps of the preferred embodiment of the present invention are summarized with respect to the flow chart of Figure 3. Prior to the start step 100, it is assumed that a communication P1712 / 99MX has been sent over an integrated services digital network interface (ISDN) connection from a central office to a terminating network element for additional routing of communication to a terminating unit. It is further assumed that the terminating network element has determined that the terminating unit is busy and that there is no designated call rescue location for communication. The preferred embodiment of the present invention then provides a busy signal for communication without the call originator associated with the communication receiving a charge for communication. This is accomplished in step 102 by the provision of a complete ISDN release message with respect to communication from the termination network element to the central office. The complete ISDN release message serves to instruct the central office to sound a busy signal for communication. Then, in step 104, the ISDN interface connection with the communication is released by the terminating network element. Provided by the foregoing discussion of the exemplary embodiments and design parameters for the present invention, these same will suggest to those skilled in the art other embodiments of the present invention. Thus, P1712 / 99MX the scope of the present invention will be limited only by the following claims: P1712 / 99MX

Claims (13)

1. NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and, therefore, the content of the following CLAIMS is claimed as property; 1. In a telecommunications network that includes a plurality of central offices and that includes a connected termination network element, by means of an Integrated Services Digital Network Interface (ISDN) connection, with a first central office of the plurality of central offices, a system for providing a communication with a busy signal that has been transmitted to the terminating network element, without this the originator of the call associated with the communication receiving a charge for the communication, the system consists of that: the termination network element is operative: to accept the communication by means of the integrated services digital network interface connection from the first central office and to form a service integrated digital network interface connection with the communication, in response to the acceptance of the communication, to determine the additional routing of the communication to a unit e termination, P1712 / 99MX to perform a check on whether the terminating unit is busy, the verification is carried out through the use of data messages between the terminating network element and a second central office, the second central office serves the terminating unit, and if the terminating unit is busy, providing a message to the first central office, the message instructs the first central office to sound a busy signal for communication and release the network interface connection digital services integrated with communication; and the first central office is operative in response to receiving the message from the termination network element to sound the busy signal for communication.
2. 2. The system according to claim 1, wherein the termination network element is a service circuit node.
3. The system according to claim 1, wherein the message is a complete integrated services digital network release message.
4. 4. The system according to claim 1, wherein the terminating network element is operative in addition to, after determining that the terminating unit is busy, causing the element of P1712 / 99MX termination network determines if a call rescue location is designated for communication, and if a call rescue location is indeed designated for communication, then route the communication to the call rescue location and desist from providing the message to the first central office 5.
5. In a telecommunications network that includes a plurality of central offices and that includes a terminating network element connected by an integrated services digital network interface connection with a first central office of the plurality of central offices, a method for providing a busy signal to a communication that has been transmitted to the terminating network element, the busy signal is provided without the terminating network element providing response monitoring for communication and without that's why the call originator associated with communication r If a communication charge is incurred, the method comprises the steps of: A. making the communication accepted on the digital network interface connection of services integrated into the terminating network element and establishing a network interface connection digital integrated services with respect to communication by the network element of P1712 / 99 X termination; B. in response to the acceptance of the communication, to have the terminating network element determine the additional routing of the communication; C. having the terminating network element perform a check as to whether the terminating unit is busy through the use of data messages between the termination network element and a second central office, the second central office serves the termination unit; D. if the terminating unit is busy, then have the terminating network element: 1. provide a message to the first central office, the message instructs the first central office to sound a busy signal for communication , and 2. free interface connection of integrated services digital network with communication; E. in response to receiving the message from the terminating network element, have the first central office sound the busy signal for communication.
6. The method according to claim 5, comprising the steps of: before step D and if the unit of P1712 / 99MX termination is occupied, then F. cause the termination network element to determine if there is a call rescue location designated for communication; and G. if there is no designated call rescue location for communication, then continue with steps D - E.
7. The method according to claim 6 further comprising the step of: H. if the determination in step F indicates that there is a call rescue location, then cause the terminating network element to route communication to the call rescue location and skip steps D-E 8.
8. A system to provide a busy signal to a transmitted communication for an integrated services digital network interface connection from a first central office 12a to a termination network element, for additional routing of the communication to a terminating unit, without the originator of the associated call receiving a charge for the communication in a telecommunications network, including an integrated services digital network interface connection that is operative to transmit a communication connection to a first central office, and a termination network element, where the termination network element has determined that the unit of P1712 / 99MX termination is busy and there is no designated call rescue location for communication; the system consists of: the termination network element is operational: to provide a complete message of integrated services digital network release with respect to communication to the first central office, the complete message of integrated services digital network release instructs the first central office to sound a busy signal to the communication, and to release the digital network interface connection from integrated services to communication; and the first central office is operative in response to receipt of the complete integrated services digital network release message from the terminating network element to sound the busy signal for communication.
9. The system according to claim 8, wherein the terminating network element is a service circuit node.
10. 10. A method for providing a busy signal to a communication transmitted over an integrated service digital network interface connection from a central office to a terminating network element for further routing of communication to a terminating unit, without P1712 / 99MX the originator of the associated call receives a charge for communication in a telecommunication network, including an integrated services digital network interface, a central office, a terminating network element and a terminating unit , wherein the terminating network element has determined that the terminating unit is busy and that there is no designated call rescue location for communication, the method comprising: causing the terminating network element to provide a complete release message integrated services digital network with respect to communication to the central office, the complete integrated services digital network release message instructs the central office to sound a busy signal for communication; and having the terminating network element release the integrated services digital network interface connection for communication, with this the central office is operational in response to the reception of the complete digital integrated services network release message to sound the busy signal for communication. The system according to claim 8, wherein the terminating network element is further operative to accept the connection communication of the P1712 / 99MX integrated services digital network interface from the central office and to form a connection of integrated services digital network interface for communication, in response to the acceptance of the communication, determine the additional routing of the communication to a terminating unit, perform a verification as to whether the terminating unit is busy, the verification is carried out through the use of data messages between the terminating network element and a second central office, the second central office serves the terminating unit, and if the terminating unit is busy, providing a message to the first central office, the message instructs the first central office so that it sounds a busy signal for communication, and releases the interface connection of the integral services digital network for communication. The system according to claim 11, wherein the first central office is further operative in response to receiving the message from the terminating network element to sound the busy signal for communication. The system according to claim 11, wherein the termination network element is further operative for, after determining that the unit P1712 / 99MX termination is busy, cause the terminating network element to determine if there is a call rescue location designated for communication, and if there is a designated call rescue location for communication, then route the communication to the call rescue location, and to desist from providing the message for the first 12th headquarters. P1712 / 99MX SUMMARY OF THE INVENTION A system and method for providing a communication, a busy signal without a terminating network element providing response monitoring and without the originator of the call associated with the communication receiving a charge for the communication. A communication that has been sent by an Integrated Services Digital Network Interface (ISDN) connection from a central office to a terminating network element for additional routing of communication to a terminating unit is accepted. in the terminating network element and an ISDN interface connection is made, but no response monitoring is provided with respect to the communication. Upon determining that the termination unit to which the communication would be sent is occupied, the terminating network element provides a complete ISDN release message with respect to communication to the central office. The complete ISDN release message instructs the central office to issue a busy signal for communication. The terminating network element also releases the ISDN interface connection with the communication. In response to receipt of the complete ISDN release message from the terminating network element, the office P1712 / 99MX central emits a busy signal for communication. P1712 / 99MX