MXPA96006704A - System and method to redirect signaling control in ba - Google Patents

Abstract

The present invention relates to a telecommunications system having a network switch capable of independently controlling incoming and outgoing call branches, a system for, and a method of, redirecting control in signaling band belonging to a call placed by a calling party and a system to provide automatic call termination of the calling party to a called party. The system for redirecting the control includes: (1) circuits for call control, associated with the network switch, to direct the call from the calling party to another party, through the network switch, the call in this way have an output branch from the network switch to the other party and (2) circuits to redirect call control, to treat the branch outgoing call as a second branch from the other party to the network switch and verify signals control band received from the other party through the second branch of income. The circuits for redirecting call control in this manner allow the other party to issue band control signals to the flame control circuits

Description

SYSTEM AND METHOD FOR REDIRECTING SIGNAL CONTROL IN BAND FIELD TECHNICAL FIELD OF THE INVENTION The present invention is directed in general to telecommunications systems and more specifically to a system and method for redirecting control of in-band signaling functions from a calling party to a a different part to the calling party. BACKGROUND OF THE INVENTION For years, the party directing a telephone call (the "calling party") has primarily been responsible for initiating the pulses, tones or other signaling codes that cause the telephone equipment such as switches to direct the calling party's call through a telephone network to a desired destination. In other words, the signaling control has rested in the hands of the calling party. To date, the only exception to this rule has been a telephone operator (or synonymously "auxiliary") that has been allowed the third unique signaling control over the caller's call, by virtue of connections from Special signage between the auxiliary and the telephone equipment. It is better to direct this traditional relationship as an example. A caller who wishes to place a call must first pick up a telephone device or instrument.

REF: 23579 The calling party must then dial or press digits corresponding to the desired destination number ("DTN"), thereby causing the telephone instrument to generate pulses or tones ("control signals") to direct the telephone equipment to to place the call through the network. If any more digits are required to complete the call, the calling party has been responsible for supplying the digits when notified. If the calling party does not know the DTN (thus requiring directory assistance) or requires other assistance (such as international access or conference) the calling party has been required to call the telephone operator to employ operator assistance , to find the DTN or complete the call. Again, the operator's special signaling connections with the telephone equipment have given the operator signaling control required to perform these functions. While this arrangement has been adequate in the past, it has become particularly disadvantageous in the current telephony world. First, the telephone network itself has become vastly more complicated. As computer systems have been integrated into the network, callers have found that they supply digits to navigate through menus, go through private PBXs ("PBXs"), place their own international calls or access new services, such as as electronic banking by phone or mailboxes voice. Currently, phone calls often resemble a computer session rather than a person-to-person conversation. Second, it becomes apparent that large centralized auxiliary centers, equipped with attendant banks, are expensive to operate. Of course, these centers have been necessary in the past, because they require special signaling connections with and therefore proximity, to the telephone equipment. However, it could be advantageous to provide the same or better level of customer service through a more economical alternative. Third, some parts are more experienced, better located or better equipped than others to perform signaling functions. For example, a calling party may wish to participate in and pay for a conference call, but has no idea how to generate the control signals to establish one. Apart from enlisting an assistant (at some cost) the calling party currently has no alternatives but to get involved through the conference procedure personally. Accordingly, what is required in the art is a way of eliminating the need for special signaling connections that are currently required to allow a party other than the calling party to control the call signaling of the calling party .

COMPENDING PE THE INVENTION If this signaling could be done on an ordinary voice channel, the current "centralized attendant centers ** can then become virtual, with the auxiliaries that are geographically distributed, probably even perform their jobs from their homes. parties other than operators can control signaling and thus "put themselves in the shoes" of the callers, allowing the better located, more capable or better equipped parties to control signaling for calls that they did not originate. Objective and therefore overcome the previously discussed deficiencies of the prior art, the present invention provides in a telecommunications system having a network switch capable of independently controlling incoming and outgoing call branches, a system for, and redirecting method control in band of the signaling that belongs It requires a call placed by a calling party and a system to provide automatic call termination of the calling party to a called party. The control redirection system includes: (1) circuits for call control, associated with the network switch, to direct the call from the calling party to another party through the network switch, the call in this way it has an incoming branch of the calling party to the network switch and an output branch from the network switch to the other party and (2) circuits to redirect call control to deal with The branching out of the call with a second branch of entry from the other party to the network switch and verify in-band control signals received from the other party by the second branch of entry, the circuits to redirect call control in this way allow the other party to issue the control signals in band to circuits for call control. The present invention therefore introduces the broad concept of allowing a party other than the calling party to issue control signals in band or commands to call control circuits. This allows the other party to "put on the shoes" of the calling party with respect to signaling via a simple voice channel (the second branch of entry). Since the present invention allows to redirect control by means of a voice channel, the other part does not require special connection with or proximity to, the network switch. For purposes of the present invention, "in band" is defined as being within a voice channel (carried over, for example, an analog home telephone line, or such as an integrated services digital network B-channel).

("ISDN"), as opposed to control or signaling channel (such as an ISDN channel or a system channel and signaling 7 ("SS7")). In other words, in-band control signals travel the same channel (or "band") as the voice, video or computer substantive data between the calling parties and others. In one embodiment, the present invention allows the other party to take control over signaling upon the issuance of a particular control signal. For purposes of the present invention, "signaling" is broadly defined to include any signaling, call processing, call forwarding or call control function. In one embodiment of the present invention, the other party is a party other than a calling party, the system allows the other party to complete a Call from the calling party to the called party. In a more specific embodiment which will be described below, the present invention allows automatic call termination whereby an operator (or auxiliary) can acquire control over the signaling functions of a calling party's call. Automatic call termination allows the assistant to complete the call from the calling party, without requiring the calling party to exercise control over the signaling. Alternately, the other part is the called party itself, the system allows The called party issues the in-band control signals to the call control circuits. In one embodiment of the present invention, the system further comprises a voice response unit (VRU) associated with call control circuits, to receive in-band voice commands issued from the other party. Alternately or additionally, the in-band control signals are dual-tone multifrequency ("DTMF") commands. Band signaling of any type however is within the scope of the present invention. In one embodiment of the present invention, call control circuits place the calling party on hold, while the other party issues the in-band control signals to the network switch. By placing the calling party on hold, this mode releases the calling party from having to listen to any in-band signaling. In addition, the network switch is made to ignore any spurious band control signals that the calling party may generate. Control in this way is granted only to the other party. In one embodiment of the present invention, the circuits for call control allow the calling party to check the output branch, while the other party forwards the control signals in band to the network switch. In this mode, the calling party can listen to the control signals in band and more specifically in the base of the call. As in the previous mode, the network switch can cause it to ignore any spurious band control signals that the calling party can generate. In one embodiment of the present invention, the circuits for call control remove the other party from the call after the other party issues the in-band control signals to the network switch. In this way, the other party can interpose control signals in band for a period of time, and then withdraw from the call. The withdrawal may occur upon the issuance of the other part of a particular control signal. The foregoing has outlined, in rather broad form, alternative embodiments and features of the present invention, so that those skilled in the art can better understand the detailed description of the invention that follows. Additional features of the invention will be described below which form the subject of the claims of the invention. Those skilled in the art will appreciate that they can readily use the described concept and specific embodiment as a basis for designing or modifying other structures to carry out the same purposes of the present invention. Those skilled in the art will also have to consider that these equivalent constructions do not deviate from the spirit and scope of the invention in its broadest form.

BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the present invention, reference is now made to the following descriptions which are taken in conjunction with the accompanying drawings, wherein: Figure 1 illustrates an isometric view of a computer system that provides an environment within which the present invention can operate; Figure 2 illustrates a schematic block diagram of the central processing unit ("UPC") of Figure 1; Figure 3 illustrates a telecommunications system employing one embodiment of a system for redirecting in-band signaling control according to the principles of the present invention; Figure 4 illustrates a method for redirecting in-band signaling control according to the principles of the present invention; Figure 5 illustrates a telecommunications system employing one modality of a call termination system in accordance with the principles of the present invention; and Figure 6 illustrates a representative method for completing a call according to the principles of the present invention.

Referring initially to Figure 1, an isometric view of a computer system 100 is illustrated which provides an environment within which the present invention can operate. Since the present invention is not limited to application in a computer environment, however, Figure 1 is presented for illustrative purposes only. The computer system 100 includes a monitor 110, a chassis 120 and a keyboard 130. The monitor lio and the keyboard 130 cooperate to allow communication between the computer system 100 and a user. Alternatively, monitor 110 and keyboard 130 may be replaced by other conventional input / output devices, respectively. The chassis 120 includes both a floppy disk drive 240 and a hard disk drive 145. The floppy disk drive 140 is used to receive, read and write to removable drives? the hard disk drive 14 is used for fast access storage and retrieval, typically to a non-removable disk. The floppy disk drive 140 can be replaced or combined with other conventional structures to receive and transmit data and instructions, including without limitation tape drives and compact disks, telephone systems and devices (including videophone, radio location, video fax technologies) and serial and parallel ports.

Chassis 120 is illustrated as having a cutting portion including a battery 150, clock 160, central processing unit ("UPC") 170 and memory storage device 180. Circuits for call control, circuits for redirecting control of call and circuits for call placement of the present invention in the illustrated modes, are formed by a cooperation of the UPC .170, the memory storage device 180 and a sequence of executable instructions, which are stored in the storage device of 180 memory and executables in the UPC 180 to be terminated as specified. Although the computer system 100 is illustrated to have a single UPC 130, the hard disk drive 145 and the memory storage device 180, the computer system 100 may be equipped with a plurality of UPCs and peripheral devices. It should be noted that any conventional computer system having at least one UPC that is suitable for functioning as a switch in the network or auxiliary center system can be replaced, or used in conjunction with, the computer system 100, including without limitation: videophones, telephones, televisions, sophisticated calculators, and manual computers, lap top / note book, mini, maxicomputers and supercomputers, including RISC and parallel processing architectures, as well as within computer system / network combinations. The architecture of the conventional computer system is discussed more fully in "Computer Organization and Argui tecture" by William Stallings, MacMillan Publishing Co. (3rd ed., 1993), here incorporated by reference. of alternate computers may be based on programs recorded in unalterable memory or physical equipment .. Turning now to Figure 2, a schematic block diagram of UPC 170 of Figure 1 is illustrated. UPC 170 is coupled to the memory storage device. 180 by a data duct 210. The memory storage device 180 stores data and instructions that the UPC 170 uses to execute the functions necessary to operate the computer system 100. The memory storage device 180 can be any storage device of conventional memory The UPC 170 includes a control unit 220, arithmetic logic unit ("ULA") 23 0 and local memory storage device 240 (for example stackable cache or a plurality of registers). The control unit 220 searches for the instructions of the memory storage device 180. The ULA 230, in turn, performs a plurality of operations, including adding AND (Boolean) AND, necessary to carry out the instructions that are sought from the device. memory storage 180. The Local memory storage device 240 provides a local high-speed storage location for storing temporary results and control information generated and used by the ULA 230. Again, call control circuits, or circuits to direct call of the present invention are incorporated into the UPC 170, in combination with the memory storage device 180. Turning now to Figure 3, a telecommunications system (e.g., a public telephone network) is illustrated which employs a system modality to redirect band signaling control according to the principles of the present invention. The system, designated 300, comprises a conventional network switch 310, coupled to a plurality of conventional telephone lines 320. The plurality of telephone lines 320 is coupled to a plurality of end points or more generally, nodes (only two of which are illustrated) within the system 300, allowing the network switch 310 to provide circuit switching between the plurality of end points or nodes. First and second end points 330, 340 are illustrated and are, for purposes of the present discussion, telephone instruments. Also, for purposes of the present discussion, the first endpoint 330 is associated with a calling party (not shown) and the second extreme point 340 is associated with another part (again, not shown). Circuits for call control 350 are coupled to and control, and network switch 310. In the illustrated embodiment, the switch 310 is controlled per processor; the call control circuits 350 therefore takes the form of a sequence of computer executable instructions running in the processor of a general-purpose computer (such as the computer system 100 of Figure 1) to cause the Conventional network switch 310 operates in a novel manner according to the present invention. Of course, the circuits for call control (and the circuits for redirecting call control and circuits for call placement, for that reason) can take the form of physically wired digital or analog circuits, as appropriate. During its normal operation, the network switch 310 couples "inbound" branches (telephone lines coupled to endpoints belonging to the calling party) to "outbound" branches (telephone lines coupled to endpoints belonging to to the called parties). In this way, callers and calls are linked together for point-to-point communication of the parties' substantive voice, video or computer data. Normally, branches of entry and exit are they transport in a single physical channel within the network switch 310 or in two physically linked channels inseparably. However, in some conventional network switches, particularly processor controlled switches, such as the commercially available DEFINIMM switch manufactured by AT &T, it is possible to separate the input and output branches of a particular call and control each branch independently. Although it has always been known that conventional network switches can be modified to separate the individual rations of a given call, there has been no motivation to modify a network switch to separate the branches, until now. In fact, under normal circumstances, it would be disadvantageous to separate the branches of a call, since this can disconnect the call. The separation of the call branches, however, is important for the present invention, since it allows circuits for call control 350, treat the output branch of the call determined as a second input branch without disturbing the original input branch. . This results in the part corresponding to the second newly designated income branch completing control over the signaling functions that previously had only been granted to the calling party through the origination branch of origin L. According to this, Figure 3 shows circuits to redirect call control 360, coupled to the call control circuits 350 and the network switch 310. The circuits for redirecting call control 360 are capable of verifying calls that pass through the network switch 310 for control signals that allow redirecting to individuals. The nature of these and other signals will be described in detail below. Figure 3 further illustrates an optional VRU 370. The VRU 370 is coupled to the call control circuits 350 and is capable of intercepting call voice commands that pass through the network switch 310. It will be understood that the VRU 370 is illustrated to be complete and is not necessary for the present invention. In the absence of a VRU 370, DTMF or other band signals can still be used to perform signaling control. It will also be understood that the system 300 may further comprise other, probably intermediate, nodes such as routers .. The presence or absence of these other nodes will not affect the operation of the present invention, and therefore are admitted of Figure 3 for reasons of clarity.

The operation of system 300 to carry out or direct the in-band signaling control is now described. Turning now to Figure 4, there is illustrated a method for redirecting in-band signaling control, in accordance with the principles of the present invention. The method begins with a start stage 400, wherein a calling party has made a call with the first endpoint 330 through the network switch 310 and under control of the circuits for call control 350. The calling party it may intentionally have placed the call to the other party at the second endpoint 340. Alternatively, the calling party may have tried unsuccessfully to direct the call to a party called without a name at a third extreme point. { not shown) and is automatically routed by the network switch 310 to the other party at the second endpoint 340. Alternatively, the network switch 310 can redirect the call automatically to the other party, even when the calling party properly placed the call to the calling party without name (probably if the call is international). In any case, the network switch 310 directs the call to the other party at the second endpoint 340. At this point in the call, the calling party has complete control of the signaling functions.

In a call verification stage 410, the circuits for redirecting control of 1 Lamada 360 verify the call for particular band control signals, which will activate call control redirection. For purposes of the present discussion, it is considered that the particular band control signal is a DTMF tone corresponding to "#", a key found on conventional telephone number keypads. (If a VRU 370 is present, the activation band control signal may be a spoken word or a series of words). If the circuits for redirecting call control 360 detect the DTMF tone "#", the circuits for redirecting call 360, direct the network switch 310 to separate the incoming branch (from the first endpoint 330 associated with the calling party) from the output branch (to the second endpoint 340 associated with the other part) of a step 420. Once separated, the circuits for redirecting call control 360 direct the circuits for call control to treat the output branch as a second branch of income in stage 430, preferably without affecting the original income ramification in any way. Circuits for redirecting 360 call control, can optionally place the original input branch on hold (to release the calling party from having to listen to the subsequent band signaling) or can allow the original revenue branch to continue verifying in-band signaling. In any case, it is advantageous that the circuits for redirecting call control 360 direct the network switch 310 to ignore any spurious band control signals of the calling party subsequently being accidentally or intentionally generated. By ignoring any of this control signal, the network switch 310 is prevented from becoming confused or misdirected by virtue of being under control of more than one party at a time. In a step 440, the circuits for call control 350 begin to accept and perform in accordance with in-band control signals from the other party via the second endpoint 340. Again, the in-band control signals may take the form of voice commands directed through the VRU 370, or may take the form of DTMF tones. The other party can direct the 360 call control circuits to perform any function that the calling party may have instructed. The other party, if properly authorized, may even have access to functions not available to the calling party (for example, functions that would only be suitable for an operator). This may be desirable, for example, the other party is an assistant and performs fee-based services on behalf of the calling party.

The present invention may also allow the other party to redirect billing for the call. This is particularly convenient, if again, the other party is an assistant. Through the use of in-band control signals, the other party can choose whether the calling party, a calling party, the other party or some third party (such as a corporate account) is finally billed for the call or, ( for that reason, quota-based services. In a step 450, it is considered that the other party wishes to leave the control by writing another particular termination control signal (for example a DTMF tone corresponding to an "*") to the circuits. for call control redirection 360. When the circuits for redirecting call control 360 receive this control signal, the circuits for redirecting call control 360, can direct the network switch 310 to collect the original input and output branches to restore the call between the calling parties and others (in this example, the network switch 310 has redesignated the output branch a total of twice). Alternately, the circuits to redirect The call control 360 can direct the network switch 310 to connect the ingress branch with another output branch that the other party may have created, while interacting with the circuits for call control 350. This is particularly appropriate in a termination. call automatic, where the other party (often an assistant) can send a second call (in the name of the calling party) to a called party and can, through the circuits to redirect 360 call control, cause the branch of the first call from the calling party, is joined to the branch of the second call to the called party. Automatic call termination will be described more particularly with respect to Figures 5 and 6. Having relinquished control, circuits for redirecting 360 call control may, under some circumstances, withdraw the other party from the call. The method then ends in a final stage 460. Turning to Figure 5, a telecommunications system employing a modality of a call termination system according to the principles of the present invention is illustrated. The automatic call termination through directory assistance service, is a well-known feature, currently offered by telephone companies. The directory assistance service typically allows a calling party to request and obtain automatic termination of a call to a calling party in a DTN, simply by pressing a button on a button telephone. In response, the directory assistance service directs the system telecommunications to which is directly linked to dial the DTN and thus complete the call automatically. Because the calling party is not directly involved in completing the call, the automatic call termination frees the calling party from the need to memorize or write the DTN (required in manual call termination) and results in a substantially more connection. fast to the called party than the manual call termination. As previously described, one of the applications of the present invention is to perform automatic call termination, wherein a more experienced, better located or better equipped auxiliary (or other party) can complete a call in the name of a calling party ( 1) without requiring the calling party to intervene and (2) without requiring a special signaling path between the auxiliary (or other party) and the network switch. Returning to Figure 5, the telecommunications system 300 includes a network switch 310 coupled to the plurality of conventional telephone lines 320. The plurality of conventional telephone lines 320 are coupled to the plurality of endpoints, allowing the switch network 310 provides circuit switching between the plurality of endpoints. The first end point 330 and a third end point 520 are illustrated and turn out to be, for purposes of the present discussion, a telephone method. Also, for purposes of this discussion, the first endpoint 330 is associated with a calling party (not shown) and the third endpoint 520 is associated with a called party (again not shown). The telecommunications system 300 also includes an auxiliary center system or global customer service center ("GSC") 530 coupled to the network switch 310 via a second endpoint 510 and having associated call setup circuits 540. Call placement circuits 540 generate in-band DTN data control signals to direct call control circuits 350 to direct calls through telecommunication network 300. Calling circuits 540 can simply receive and send codes DTMF or voice command from an auxiliary and may in fact form a portion of the second endpoint 510 or may be an automated operator capable of completing calls and therefore a separate piece of equipment (as illustrated). Again, the call control circuits 350 are coupled to and control, the network switch 310. Again, during its normal operation, the network switch 310 couples "input" branches (telephone lines coupled to endpoints which belong to calling parties) to "outgoing" branches (telephone lines coupled to endpoints belonging to the called parties).

The circuits for redirecting call control 360 are illustrated again coupled to the call control circuit 350 and the network switch 310. As with FIG. 3, the circuits for redirecting call control 360 are capable of verifying that calls are being made. through the network switch 310 for control signals that allow individuals to redirect. Figure 5 further shows the optional VRU 370. The VRU 370 is coupled to the call control circuits 350 and is capable of intercepting voice commands of the calls that pass through the network switch 310. As in Figure 3, It will be understood that VRU 370 is illustrated to be complete and is not necessary for the present invention. In the absence of a VRU 370, DTMF or other band signals can still be used to perform signaling control. The operation of system 300 to effect bandwidth control control redirection will now be described. Turning now to Figure 6, a representative method for completing a call according to the principles of the present invention is illustrated. The method begins with a start step 600, wherein a calling party has made a call through a first endpoint 330 through the network switch 310 and under control of the circuits for call control 350. If a calling party whether or not it has been pretended, the network switch 310 directs the call to the GCSC 530 at the second endpoint 510. At this point in the call, the calling party has complete control of the signaling functions. In a monitor call verification step 610, the circuits for redirecting call control 360 verify the call for particular band control signals, which will activate the call control redirection. Again for purposes of the present discussion, the particular band control signal will be considered to be a DTMF tone corresponding to "#", a key found on conventional telephone number keypads. (If the VRU 370 is present, the activation band control signal may be a spoken word or a series of words). If the circuits for redirecting call control 360 detect the DTMF tone "#", the circuits for redirecting call 360 direct the network switch 310 to separate the incoming branch (from the first endpoint 330 associated with the calling party) from the output branch (to the second endpoint 340 associated with the GCSC 530) in a step 630. Once separated, the circuits for redirecting call control 360 direct the circuits for call control to treat the output branch as a second branch of income in a 630 stage, preferably without affecting the original income ramification in any way. The circuits to redirect 360 call control, can optionally place on standby the branch of original entry (to release the calling party from having to listen to the subsequent band signaling) or may allow the original entry branch to continue verifying the in-band signaling. In any case, it is advantageous that the circuits for redirecting call control 360, direct the network switch 310 to ignore any spurious band control signals that the calling party may subsequently report accidentally or intentionally generating. By ignoring any of these control signals, the network switch 310 is prevented from becoming confused or misdirected by virtue of being under control of more than one party at a time. In step 640, the call control circuits 350 begin to accept and perform according to band-control signals of the circuits for call placement 540 in the GCSC by the second endpoint 510. Again, the signals of In-band control can take the form of voice commands directed through the VRU 370, or they can take the form of DTMF tones. The GCSC 530 can direct the call control circuits 360 to complete the call to the called party, by the third endpoint 520 according to the instructions of the calling party. In a step 650, it is considered that, after making the call, the GCSC 530 wishes to relinquish control of the call. Preferably, the GCSC 530 waives control when issuing another particular termination control signal (probably a DTMF tone corresponding to an "*") to circuits for 360 call control redirection. When circuits for redirecting 360 call control receive this control signal, the circuits to redirect 360 call control they direct the network switch 310 to connect the input branches with the output branch, which the GCSC 530 creates when it concretes the call on behalf of the calling party. Having relinquished control, circuits to redirect 360 call control advantageously withdraw the GCSC 530 of the call. The method ends in a final stage 660.

Either the calling party or the called party can end the call after the GCSC 530 leaves it. Although the present invention has been described in detail, those skilled in the art will understand that various changes, substitutions and alterations may be made, without departing from the spirit and scope of the present invention in its broadest form.

Claims (23)

1. ^ VINDICATIONS 1.- In a telecommunication system that has a switch? E network capable of independently controlling incoming and outgoing call branches, a system for redirecting control in signaling band . call directed by a calling party, characterized in that it comprises: circuits for call control, associated with the network switch, for directing the call from the calling party to another party via the network switch, the call in this way has an incoming branch from the calling party to the network switch and an output branch from the network switch to the other party; and circuits for redirecting call control to deal with the branching out of the call, as a second branch of ingress from the other party to the network switch and verifying in-band control signals received from the other party by the second ingress branch, The circuits for redirecting call control, in this way allow the other party to send the control signals in band to the circuits for call control.
2. 2. The system as described in claim 1, characterized in that the other party is a different party to the calling party, the system allows the other party to complete a call from the calling party to the called party.
3. 3. - The system as described in claim 1, characterized in that the other part is a call party, the system allows the called party to send the control signals in band to the circuits for call control.
4. 4. The system as described in the claim 1, characterized in that it further comprises a voice response unit (VRU), associated with the circuits for call control, to receive voice commands in band issued from the other party.
5. 5. The system as described in the claim 1, characterized in that the in-band control signals are dual tone multifrequency (DTMF) commands.
6. 6. The system as described in the claim 1, characterized in that the circuits for call control put the calling party on hold, while the other party sends the control signals in band to the network switch.
7. 7. The system as described in the claim 1, characterized in that the circuits for call control allow the calling party to verify the output branch while the other party sends the control signals in band to the network switch.
8. 8. The system as described in the claim 1, characterized in that the circuits for call control remove the other part of the call, after which the other The part sends the control signals in band to the network switch.
9. 9. In a telecommunications system having a network switch capable of independently controlling incoming and outgoing call branches, a method for redirecting control in signaling band which refers to a call placed by a calling party, characterized in that it comprises the steps of: directing the call from the calling party to another party via the network switch, the call in this way has an incoming branch from the calling party to the network switch and an output branch from the switch from network to the other party; treat the branching out of the call as a second branch of entry from the other side of the network switch; and checking the in-band control signals received from the other party by the second ingress branch, thereby allowing the other party to send the in-band control signals to the network switch.
10. 10. The method according to claim 9, characterized in that the other party is a different party than the called party, the method allows the other party to complete a call from the calling party to the called party.
11. 11. - The method according to claim 9, characterized in that the other part is a called party, the method allows the called party to send the control signals in band to the circuits for call control.
12. 12. The method according to the claim 9, characterized in that it also comprises a voice response unit (VRU), associated with the network switch, the step of verifying comprises the step of receiving voice commands in band issued from the other party.
13. 13.- The method according to the claim 9, characterized in that the in-band control signals are dual tone multifrequency (DTMF) commands.
14. 14. The method according to claim 9, characterized in that it further comprises the step of placing the called party on hold, while the other party sends the control signal in band to the network switch.
15. 15.- The method according to the claim 9, characterized in that it further comprises the step of allowing the calling party to verify the output branch, while the other party issues the in-band control signal to the network switch.
16. 16. The method according to claim 9, characterized in that it further comprises the step of withdrawing the other party from the call after the other party issues control signals in band to the network switch.
17. 17. - In a telecommunications system having a processor-controlled network switch capable of separating incoming and outgoing call branches, and a coupled auxiliary center system, a call termination system to provide automatic call termination from a party calling a called party, characterized in that it comprises: circuits for call control, associated with the network switch, for directing a first call from the calling party to the auxiliary center system through the network switch and verifying control signals in band that are received in the auxiliary center system; and circuits for call placement, associated with the auxiliary center system, to generate data control signals destination numbers in band and to direct the call control circuit, to place a second call to the called party, through of the telecommunications network, the call control circuits subsequently melt the first and second calls to couple the calling party with the called party through the telecommunications network, the call control circuits place the second call.
18. 18. The system for call termination as described in claim 17, characterized in that it also comprises a voice response unit (VRU), associated with the circuits for call control, to receive commands from voice in band issued through the auxiliary center system.
19. 19. The system for call termination as described in claim 17, characterized in that the circuits for call control place the first call on hold, while the call control circuits place the second call with the called party through of the network switch.
20. 20. The system for call termination as described in claim 17, characterized in that the circuits for call control allow the calling party to verify a branch of incoming call of the first call, while the control circuits of call place the second call with the called party through the network switch.
21. 21. The system for call termination as described in claim 17, characterized in that the auxiliary center system transmits the control signals to the call control circuits by means of an outgoing call branch of the first call.
22. 22. The system for call termination as described in claim 17, characterized in that the circuits for call control remove the auxiliary center system of the first call after the call termination circuits merge the first and second call. calls to connect the calling party with the called party through the network switch.
23. 23. The system for call termination or is described in claim 17, characterized in that the circuits for call control place the second call with the called party through the network switch.