KR100245758B1 - Method for receiving digit data about toll/intrazonal call of multi frequency pluse packet separate type - Google Patents

Abstract

According to the present invention, the MF-PPE (Multi Frequency Plus Packet Separate) method, which is the inter-register register signaling method, is used in a domestic all-electronic exchange, so that the incoming exchange can receive information of originating / receiving subscribers for local / external calls from the originating exchange. -A method of receiving a number for a call in a city / external call in a PPE signaling method. A first step in which an incoming call processing control unit 13 checks a signaling method of a corresponding relay line when a relay line occupancy signal is applied from an originating exchange 2; Wow; As a result of the check, if the corresponding trunk line signal method is MF-PPE signal method, the available channel among the MF-PPE channels in the MF-PPE signal interface device 16 is selected to connect the channel between the MF-PPE channel and the transmission line between stations. A second step of transmitting an MF-PPE channel occupancy request signal to the next MF-PPE signal control unit 15; A third, in response to the MF-PPE channel occupancy request signal from the incoming call processing control unit 13, the MF-PPE signal control unit 15 sends the first ANI request signal to the originating exchange 2 for a predetermined time; step; A fourth step of determining whether the corresponding call is a long distance call or a local call based on the ANI information when two pieces of ANI information are transmitted from the originating exchange 2 in response to the ANI request signal; If the call is a long-distance call, the long-distance call information is stored in the reception buffer. If the call is a local call, the long-distance call information is stored in the reception buffer and the second ANI request signal is transmitted to the originating exchange 2 for a predetermined time. A fifth step; A sixth step of reporting the ANI information and the transmission / reception result to the incoming call processing controller (13) when a predetermined number of pieces of ANI information is transmitted from the originating exchange (2) in response to the ANI request signal; A seventh step in which the incoming call processing control unit 13 stores the corresponding ANI information in a buffer and checks the ANI information transmission / reception result to determine whether the ANI transmission / reception is successful; If the ANI transmission / reception is successful, the MF-PPE channel channel is disconnected on the inter-station transmission path and call processing is continued. If the ANI transmission / reception fails, the MF-PPE channel channel on the inter-station transmission channel is failed. It characterized in that the eighth step of stopping the ongoing call processing after cutting.

Description

Number Receiving Method for City / Call in MFF-PPE Signaling System

The present invention relates to a method for receiving a number for a city / foreign call in an MF-PPE signaling method. More particularly, the present invention relates to a multi-frequency plus packet separate (MF-PPE) method, which is a register signaling method between stations in a local telephone exchange. The present invention relates to a method for receiving a number for a call in a local / external call in an MF-PPE signaling system in which an exchange can receive information on an originating / receiving subscriber from an originating exchange.

The conventional electronic switch exchanges incoming / outgoing information on the calling party (for example, information on calling party number and calling grade) or information on called party (eg, calling party number) to perform call processing. R2 signal or NO.7 signal was used as a signal for exchange in the exchange period.

However, as various communication services are realized due to the development of exchange technology, information exchange for incoming / outgoing subscribers between incoming / outgoing calls based on signaling methods other than the R2 signaling method or NO.7 signaling method, that is, MF-PPE signaling method As required, there was a problem that a separate protocol for the MF-PPE signaling should be presented in order for the subscriber to receive information on the called subscriber and the calling subscriber by the MF-PPE signaling.

Accordingly, the present invention has been created to solve the above problems, and the destination exchange is a caller / receiver to a local / external call by the multi-frequency plus packet separate (MF-PPE) method, which is a register signaling method between stations in a national electronic switchboard. Its purpose is to provide a method of receiving a number for a local / external call in the MF-PPE signaling system that can receive information from the originating exchange.

According to an embodiment of the present invention for realizing the above object, a first step of the incoming call processing control unit checks the signaling method of the corresponding relay line when the relay line occupancy signal is applied from the originating exchange; As a result of the check, if the corresponding trunk line signal method is MF-PPE signal method, select an available channel among the MF-PPE channels in the MF-PPE signal interface device and connect the channel between the MF-PPE channel and the transmission line. Transmitting a MF-PPE channel occupancy request signal to a PPE signal controller; A third step of sending, by the MF-PPE signal controller, a first ANI request signal for a predetermined time in response to the MF-PPE channel occupancy request signal from the incoming call processing controller; A fourth step of determining whether the corresponding call is a long distance call or a local call based on the ANI information when two pieces of ANI information are transmitted from the originating exchange in response to the ANI request signal; If the call is a long-distance call, the long-distance call information is stored in the receiving buffer; if the call is a local call, the local call information is stored in the receiving buffer, and the fifth ANI request signal is transmitted to the calling exchange for a predetermined time. step; A sixth step of reporting the ANI information and the transmission / reception result to the incoming call processing controller when a predetermined number of pieces of ANI information is transmitted from the originating exchange in response to the ANI request signal; A seventh step in which the incoming call processing controller stores the corresponding ANI information in a buffer and checks the ANI information transmission / reception result to determine whether the ANI transmission / reception is successful; If the ANI transmission / reception is successful, the MF-PPE channel channel is disconnected on the inter-station transmission path and call processing is continued. If the ANI transmission / reception fails, the MF-PPE channel channel on the inter-station transmission channel is failed. There is provided a method for receiving a number for a city / external call in an MF-PPE signaling method comprising an eighth step of cutting a call process and then stopping an ongoing call process.

According to the present invention consisting of the above steps, the receiving / receiving subscriber information of the MF-PPE signal type transmitted from the calling exchange at the destination exchange side to provide a specific service or billing, etc. based on the calling / called subscriber information It is possible to perform efficient call processing by calculating.

1 is a view showing the main block configuration of the electron exchanger to which the present invention is applied;

Figure 2 is a signal flow diagram for the long distance code to which the present invention is applied,

3 is a signal flow diagram for a city call to which the present invention is applied,

4 is a timing chart for the MF-PPE transmit / receive signal according to the present invention;

5 and 6 are flowcharts illustrating a method of receiving a number for a city / external call in an MF-PPE signal system according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1: call exchanger, 2: call exchanger,

11: line control unit, 12: line signal interface device,

13: incoming call processing control part, 14: switch connection part,

15: MF-PPE signal control unit, 16: MF-PPE signal interface device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of the main electronic switch according to the present invention, in which reference numeral 11 denotes that a line signal can be transmitted / received through a line signal interface device of a counterpart switching center when one call is generated. Line signal control unit that analyzes / processes all the line signals present, and 12 is a line signal interface device that generates information on the line signal and serves as a physical path for all signals that can be transmitted and received between the calling and receiving stations. 13 is an incoming call processing control unit that is in charge of the overall control of one call processing and the control of incoming / outgoing call information reception processing.

Further, reference numeral 14 denotes a switch connecting portion for connecting the calling subscriber and the communication path of the counterpart exchange period and the communication path for transmitting / receiving the MF-PPE signal, and 15 is through the MF-PPE signal interface device 16 which will be described later. An MF-PPE signal controller that analyzes / processes the received MF-PPE signal and controls the continuous transmission / reception of the MF-PPE signal. 16 is composed of a plurality of MF-PPE channels 0-N (16a-16n). And an MF-PPE signal interface device for generating MF-PPE information.

FIG. 2 shows a signal flow diagram for the out-of-field call between the originating exchange 2 and the destination exchange 1 shown in FIG. 1. According to the figure, the originating exchange 2 is the first ANI request signal to the destination exchange 1. If the originating exchange (2) is sent (for example, the originating number is def-xxxx, the called number is ABC-abc-xxxx, and the calling class is Cx), the originating switch and the first digit (A) for the called party are sequentially sent. After transmitting the multi-frequency signal corresponding to the class (Cx), and then the terminating exchange (1) sends a second ANI request signal, the originating exchange (2) sequentially and the total digit (ABCabcxxxx) and the originating class for the called party Transmit multi-frequency signal for (Cx) and all digits (def-xxxx) for calling number.

In addition, FIG. 3 shows a signal flow diagram of a local call between the originating exchange 2 and the destination exchange 1 shown in FIG. 1, and according to the drawing, the originating exchange 2 is the first ANI as the destination exchange 1. When the request signal is transmitted, the originating exchange 2 has, for example, the originating number def-xxxx, the called number 2ab-c-xxxx, and the originating class Cx, and the first digit (A) for the called party sequentially. Transmit the multi-frequency signal corresponding to the calling class (Cx), and then, when the terminating exchange 1 transmits the second ANI request signal, the originating exchange 2 sequentially transmits the entire digit (2abcxxxx) for the called party. Transmit multi-frequency signal for class (Cx) and all digits (def-xxxx) for originating number.

On the other hand, a multi-frequency signal for indicating the digits for the called party or the digits for the called party and the called party described above is defined in the following (Table 1).

Definition of MF-PPE Frequency and Signal Signal type Frequency (Hz) Outgoing exchange → Incoming exchange Call exchanger → Call exchange One 700 + 900 Number 1, calling class 1 2 700 + 1100 Number 2, calling class 2 ANI request signal (B2) 3 900 + 1100 Number 3, calling class 3 4 700 + 1300 Number 4, calling class 4 5 900 + 1300 Number 5, calling class 5 6 1100 + 1300 Number 6, calling class 6 7 700 + 1500 Number 7, calling grade 7 8 900 + 1500 Number 8, calling class 8 9 1100 + 1500 Number 9, calling class 9 10 1300 + 1500 Number 0, calling class 0

In addition, the timing of the MF-PPE transmission signal and the MF-PPE reception signal transmitted between the source exchange 2 and the destination exchange 1 shown in Figs. 2 and 3 are shown in Fig. 4.

That is, when the terminating exchange 1 transmits the 700 + 1100 Hz multi-frequency signal corresponding to the first ANI request signal to the originating exchange 2 for 48 ms, the originating exchange 2 transmits the multi-frequency signal corresponding to the first digit signal. Is transmitted to the destination exchanger (1) for 48 ms, and then 64 ms later is transmitted to the destination exchanger (1) for 48 ms.

Subsequently, when the terminating exchange 1 transmits a multi-frequency signal of 700 + 1100 Hz corresponding to the second ANI request signal for 400 ms to the originating exchange 2 for 400 ms, the originating exchange 2 receives the terminating exchange 1 The multi-frequency signal corresponding to the called digit is sequentially transmitted for 48ms, and after 64ms, the multi-frequency signal corresponding to the next digit (next digit) is transmitted. Send all digits of calling grade and calling number sequentially.

Hereinafter, with reference to the flowchart shown in Figs. 5 and 6 will be described in detail the number reception method for the city / call in the MF-PPE signaling method according to an embodiment of the present invention.

First, when the relay line occupancy signal transmitted from the originating exchange 2 is transmitted to the line signal controller 11 of the terminating exchange 1 (step 101), the line signal controller 11 is the incoming call processing controller. Report incoming call occupancy to (13) (step 102).

On the other hand, the incoming call processing control unit 13 checks the signal type of the corresponding relay line occupied (step 103), and if the relay line is the MF-PPE signal type (step 104), the MF-PPE signal On the basis of the state of each MF-PPE channel stored in the control unit 15, any MF-PPE channel available among the plurality of MF-PPE channels 16a-16n configured in the MF-PPE signal interface device 16 is selected. Next, in step 105, the switch connection unit 14 is controlled to connect a path between the MF-PPE channel and the corresponding transmission path so that the MF-PPE signal can be transmitted / received through inter-transmission (step 106). The channel occupancy request signal for the MF-PPE channel is transmitted to the MF-PPE signal controller 15 (step 107), and the state transitions to an ANI (Automatic Number Identification) information reception state (step 108).

Meanwhile, the MF-PPE signal controller 15 receiving the MF-PPE channel occupancy request signal from the incoming call processor 13 initializes data related to the MF-PPE channel selected in step 105 (step 110). ), A first waiting time counter is started to monitor whether the corresponding MF-PPE transmit / receive signal is within a defined time, and the first waiting time counter performs a counting operation in units of 1 second and operates for 16 seconds. It is set (step 111).

Subsequently, the MF-PPE signal controller 15 determines whether an MF-PPE signal is transmitted / received between the originating exchange 2 and the destination exchange 1 while the first waiting time counter performs a counting operation. (Step 113), if the first waiting time counter has timed out after 16 seconds set in the first waiting time counter in the state that the MF-PPE signal is not transmitted / received (YES in step 113), Perform abnormal signal receiving processing.

In addition, the MF-PPE signal control unit 15 operates the second waiting time counter to set a waiting time after sending the first ANI request signal after starting the first waiting time counter (step 112). In the present invention, the second waiting time counter is set to operate for 400 ms by performing a counting operation in units of 1/1000 second.

In this state, the MF-PPE signal controller 15 determines whether the second waiting time counter has timed out after 400 ms has elapsed (step 119), and as a result, the second waiting time counter has passed by 40 ms. If it is timed out (YES in step 119), after the first request signal is sent to the originating exchange 2, a new counter is set to 48 ms to control its signal transmission time (step 120). The switch connection unit 14 and the line signal interface device 12 transmit a 700 + 1100 Hz multi-frequency signal corresponding to the first ANI request signal B2 generated by the MF-PPE channel of the MF-PPE signal interface device 16. ) To be sent to the originating exchange 2 via the interstation transmission path (step 121).

If the first counter has timed out after 48 ms has elapsed after the ANI request signal B2 has been transmitted (YES in step 123), the MF-PPE signal control unit 15 performs the MF-PPE signal interface device 16. Control to stop transmission of the first ANI signal (step 124), and then transition to the ANI information reception standby state (step 125).

When the ANI information is received from the originating exchange 2 in the ANI information reception standby state (step 127), the MF-PPE signal control unit 15 stores the received ANI information in the built-in receiving buffer and at the same time the built-in ANI information. The information receiving counter is increased by one (step 128), and then the second counter whose operating time is set to 80 ms is started (step 129).

In contrast, the MF-PPE signal controller 15 monitors whether the second counter times out after 80 ms has elapsed (step 130), and when the second counter has timed out after 80 ms has elapsed (step 130). If the abnormal signal processing operation is performed (130 at YES), but the reception of ANI information from the originating exchange 2 is terminated (NO at step 130) when 80 ms has not elapsed (NO at step 130), the built-in reception is performed. The counter is checked (step 137) to determine whether the reception counter is two (step 138).

As a result of the determination, if the reception counter does not match 2 (NO in step 138), the second counter is initialized (step 139), and then the procedure proceeds to step 125, where the ANI information reception wait state is received to receive new ANI information. On the other hand, if the reception counter matches 2 (YES in step 138), the first received ANI information is analyzed (step 141).

Then, as a result of the analysis, it is determined whether the ANI information coincides with 2, and if the ANI information coincides with 2 (YES in step 142), the information of the call is stored in the local call (step 143), and the ANI information coincides with 2 If not (NO in step 142), the call information is stored as a long distance code (step 144). Here, 2 is designated by the number plan as the first digit representing the city call.

Thereafter, the MF-PPE signal controller 15 starts a second waiting time counter having an operation time of 400 ms to set a waiting time for transmitting the second ANI request signal (step 146), and then the 400 ms It is determined whether the second waiting time counter has timed out (step 147).

As a result of the determination, when the second waiting time counter has timed out (YES in step 147) after 400 ms has elapsed, the first counter with the operation time set to 48 ms is started (step 150), and the originating exchange 2 A multi-frequency signal of 700 + 1100 Hz corresponding to the ANI request signal is transmitted to the second side (step 151), and it is monitored whether the first counter has timed out after the 48 ms has passed (step 152).

If the first counter is timed out after 48 ms (YES in step 152), the MF-PPE signal controller 15 stops sending the ANI request signal to the originating exchange 1 side (step S152). 153), the state transitions to the ANI information reception standby state (step 154).

In such a state, when ANI information is received from the originating exchange 2 (step 155), the MF-PPE signal control unit 15 stores the received ANI information in the built-in receiving buffer and at the same time the built-in ANI information receiving counter. Is increased by one (step 156), and then the second counter whose operating time is set to 80 ms is started (step 157).

In contrast, the MF-PPE signal controller 15 monitors whether the second counter times out after 80 ms has elapsed (step 158), and when the second counter times out after 80 ms has elapsed (step 158). If the abnormal signal processing operation is performed (YES at 158), but the reception of ANI information from the originating exchange 2 is terminated (NO at step 158) when 80 ms has not elapsed (NO at step 158), the built-in reception is performed. After checking the counter (step 162), it is determined whether the reception counter is 20 (step 165), and if the reception counter does not match 20 (NO in step 165), the first counter is initialized. Next (step 166), the process proceeds to step 154 to transition to the ANI information reception standby state for receiving new ANI information.

However, on the contrary, if the reception counter in step 165 matches 20 (YES in step 165), the MF-PPE signal controller 15 stores the incoming call processing controller 13 in the reception buffer. Report the ANI information and notify the transmission / reception result (step 166), initialize the second counter operated in the step 157, initialize the first waiting time counter operated in the step 111, and In step 106, the connected MF-PPE channel related information is initialized and terminated (step 167).

On the other hand, the incoming call processing controller 13, which has been informed of the ANI information and the transmission / reception result from the MF-PPE signal controller 15, stores the corresponding ANI information in an embedded buffer (step 169), Check the transmission and reception results (step 170).

On the basis of the check result, it is determined whether to transmit or receive the corresponding ANI information (step 171), and if the transmission / reception of the corresponding ANI information is successful (YES in step 171), the switch connecting unit 14 is controlled to Any MF-PPE channel configured in the MF-PPE signal interface device 16 and the communication path on the station transmission path are disconnected (step 173), and call processing is continued to analyze the called number from the ANI information and correspond to the called number. A call route is called to establish a voice path between the called subscriber and the calling party to enable the call (step 174).

However, on the contrary, if it is determined in step 171 that transmission / reception of the corresponding ANI information has failed (NO in step 171), the switch connection unit 14 is controlled to control the arbitrary configuration of the MF-PPE signal interface device 16. The communication path on the transmission path between the MF-PPE channel and the station is cut (step 176), and the call processing in progress is stopped (step 176).

Therefore, when an incoming call arrives from the originating exchange 2 of the MF-PPE signaling system, the incoming call from the originating exchange 2 is received and classified into a local call and a long distance call. Receives a multi-frequency signal and stores it in the receiving buffer as call / call information for the call, and then performs a call processing operation based on the call / call information.

On the other hand, the first waiting time counter times out after 16 seconds in step 113 shown in FIG. 5 (YES in step 113), or the second counter times out after 80 ms in step 130 (YES in step 130). When the second counter times out (YES in step 158) after 80 ms has elapsed in step 158, the abnormal signal reception processing operation is performed. Referring to the flowchart shown in FIG. 6, the abnormal signal receiving processing operation is performed. It will be described in detail.

First, when the MF-PPE signal control unit 15 detects a failure state of the MF-PPE transmission and reception (step 200), the MF-PPE signal control unit 15 sends the incoming call processing control unit 13 to the MF-PPE. After the transmission / reception failure is reported (step 201), transmission / reception of the corresponding MF-PPE signal is terminated (step 202).

On the other hand, the incoming call processing control unit 13, which has received the MF-PPE transmission / reception failure report from the MF-PPE signal control unit 15, controls the switch connection unit 14 to the MF-PPE signal interface device 16. The communication channel on the transmission path between any configured MF-PPE channel and the station is cut (step 203), and call processing in progress is stopped (step 204).

As described above, according to the number receiving method for the city / foreign call in the MF-PPE signaling method according to an embodiment of the present invention, when the local call or the long-distance call arrives from the originating exchange using the MF-PPE signaling method, Receives incoming / outgoing information of multi-frequency from the call processing operation for the corresponding call based on the incoming / incoming information.

Therefore, the caller / caller number can be received through the caller / caller information transmitted by the MF-PPE signaling method, and the specific call service is provided or billed based on the caller / caller information. Will be able to perform

Claims (12)

A first step in which the incoming call processing controller 13 checks the signaling method of the corresponding relay line when the relay line occupying signal is applied from the originating exchange 2; As a result of the check, if the corresponding trunk line signal method is MF-PPE signal method, the available channel among the MF-PPE channels in the MF-PPE signal interface device 16 is selected to connect the channel between the MF-PPE channel and the transmission line between stations. A second step of transmitting an MF-PPE channel occupancy request signal to the next MF-PPE signal control unit 15; A third, in response to the MF-PPE channel occupancy request signal from the incoming call processing control unit 13, the MF-PPE signal control unit 15 sends the first ANI request signal to the originating exchange 2 for a predetermined time; step; A fourth step of determining whether the corresponding call is a long distance call or a local call based on the ANI information when two pieces of ANI information are transmitted from the originating exchange 2 in response to the ANI request signal; If the call is a long-distance call, the long-distance call information is stored in the reception buffer. If the call is a local call, the long-distance call information is stored in the reception buffer and the second ANI request signal is transmitted to the originating exchange 2 for a predetermined time. A fifth step; A sixth step of reporting the ANI information and the transmission / reception result to the incoming call processing controller (13) when a predetermined number of pieces of ANI information is transmitted from the originating exchange (2) in response to the ANI request signal; A seventh step in which the incoming call processing control unit 13 stores the corresponding ANI information in a buffer and checks the ANI information transmission / reception result to determine whether the ANI transmission / reception is successful; If the ANI transmission / reception is successful, the MF-PPE channel channel is disconnected on the inter-station transmission path and call processing is continued. If the ANI transmission / reception fails, the MF-PPE channel channel on the inter-station transmission channel is failed. Method for receiving a number for the stream / call in the MF-PPE signaling method, characterized in that the eighth step of stopping the ongoing call processing after cutting. 2. The method of claim 1, wherein the third step comprises the steps of: the MF-PPE signal control unit 15 initializing the MF-PPE channel related data when the MF-PPE channel request signal is input; The second waiting time counter is operated by operating a first waiting time counter to monitor whether all the processes of MF-PPE transmission and reception are performed within a certain time and a waiting time counter for counting waiting time before sending the first ANI request signal. Transmitting a first ANI request signal to the originating exchange (2) after starting a first counter for controlling the time of transmission of the ANI request signal when the timeout occurs; And stopping the transmission of the ANI request signal when the first counter times out. 3. The number reception of a local / external call in MF-PPE signaling method according to claim 2, characterized in that, in the step, when the first waiting time counter has timed out, transmission / reception of an MF-PPE signal has failed. Way. 2. The MF-PPE signaling method according to claim 1, wherein in the fourth step, ANI information corresponding to the first digit of the called party and the calling class is transmitted from the originating exchange 2 to the terminating exchange 1; How to receive number for city / foreign area. 4. The method of claim 1, wherein the fourth step further comprises storing the ANI information when the ANI information is received from the originating exchange 2, increasing the reception counter by one, and then providing a second counter for monitoring the reception state of the ANI information. Operating; If the reception of the ANI information is terminated before the second counter is timed out, the reception counter is checked. If the reception counter is less than 20, the second counter is initialized and the new ANI information is received. Analyzing the first ANI information if it matches with; A method for receiving a number for a city / foreign call in the MF-PPE signaling method, wherein the call is classified into a long distance call and a city call based on the analysis result. 6. The method of claim 5, wherein in the step, when the second counter times out, it is determined that transmission / reception of the MF-PPE signal has failed. The transmission time of the ANI request signal according to claim 1, wherein the fifth step operates a second wait time counter for counting waiting time before sending the first ANI request signal, and if the second wait time counter times out. Sending a second ANI request signal to the originating exchange (2) after operating a first counter to control the control; And stopping transmission of the ANI request signal when the first counter times out. The method of claim 1, wherein when the ANI information is received from the originating exchange 2, the sixth step stores the ANI information, increases the reception counter by one, and then provides a second counter for monitoring the reception state of the ANI information. Operating; If the reception of the ANI information is terminated before the second counter is timed out, if the reception counter is less than 20, the receiving counter further comprises initializing the second counter and receiving new ANI information. Features Number Receiving Method for City / Call in MF-PPE Signaling. 2. The number of the city / encryption in MF-PPE signaling method according to claim 1, wherein the sixth step further comprises initializing the second counter and initializing the first waiting time counter. Receive method. 9. The method of claim 8, wherein in the step, when the second counter times out, it is determined that transmission / reception of the MF-PPE signal has failed. 10. The apparatus according to claim 1 or 8, wherein the ANI information transmitted from the originating exchange 2 comprises information about a called number, a calling grade, and a calling number. For receiving number. 11. The method according to any one of claims 3, 6 and 10, wherein when the transmission / reception failure of the MF-PPE signal is determined, the MF-PPE signal control unit 15 passes to the incoming call processing control unit 13. Reporting an MF-PPE transmission and reception failure; The incoming call processing control section 13 cutting the call path between the corresponding station transmission path and the MF-PPE channel by the report; A method for receiving a number for a local / external call in an MF-PPE signaling method, further comprising: stopping a call processing currently in progress.

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