KR100270742B1 - Apparatus and method for processing call in remote subscriber module of full electronic telephone exchange - Google Patents

Abstract

PURPOSE: A device for processing a call in an RSM(Remote Subscriber Module) of a full electronic exchange is provided to perform a call service between inner subscribers of the RSM even through errors are generated on a base station and an RSM interface link. Therefore, it is possible to perform communication between the inner subscribers in an emergency. CONSTITUTION: A subscriber controller(50) receives digits from inner subscribers, and supplies various tones to the inner subscribers. If an interface link between an RSM(Remote Subscriber Module) and a base station is in an abnormal state, the subscriber controller(50) connects inner channels in order to perform an inner switching between the inner subscribers of the RSM. If the interface link between the base station and the RSM is in a normal state, an RSM processor(40) stores received inner subscriber information of the RSM. If the interface link between the base station and the RSM is in an abnormal state, the RSM processor(40) receives the digits dialed by the inner subscribers through a digit receiving channel of the subscriber controller(50), and analyzes the received digits to confirm the stored inner subscriber information. If receiving subscribers correspond to the inner subscribers, the RSM processor(40) connects the receiving subscribers with inner channels of transmitting subscribers, and performs a call processing service.

Description

APPARATUS AND METHOD FOR PROCESSING CALL IN REMOTE SUBSCRIBER MODULE OF FULL ELECTRONIC TELEPHONE EXCHANGE}

The present invention relates to an electronic switchboard, and more particularly, in a remote subscriber module of an electronic switchboard that enables call processing service between subscribers in a remote subscriber module when a matching link state between a mother station and a remote subscriber module of the electronic switchboard is abnormal. It relates to a call processing apparatus and method of.

The electronic switching system performs call service to remote subscriber groups as well as to remote subscriber groups. The mobile station directly performs a call connection service for the subscriber group in the short distance, and installs a Remote Subscriber Module (RSM) in the remote subscriber group there and connects the relay link with the home station. Perform a connection service. 1 is a block diagram of a conventional all-electro-exchange system. Referring to FIG. 1, FIG. 1 is a block diagram of an electronic switch system in which a conventional home station and a remote subscriber module are matched by a link. Processor Communication) This IPC includes not only data necessary for call processing, but also an alarm message generated from the remote subscriber module and a test-related message for maintenance of the remote subscriber module subscriber. The components of the electronic switch system are largely composed of a mother station, a Time Switching Link (TLS) 24, a Data Link Interface (DLI) 18, a Dual Tone Multi-Frequence Receiver (DTMFR) 26, a Remote Subscriber Interface Matching Processor (RSIP). Processor 20, Access Switching Processor 22, Remote Subscriber Module Processor (RSMP) 10, Data Link Channel 12 (DLC) 12, and Analog Subscriber Interface (ASI) 14 It consists of BRI 28, Test Equipment Control (TEC) 30, Ring Generator (RG) 32, and Data Link Interface (DLI) 16. Explaining the role of each component in detail, the remote subscriber module processor 10 controls the remote subscriber device and link, test equipment, and call processing, detects when the subscriber hooks off, occupies the DLC 12, and collects this information in the LAP-D. Report to ASP 22 via RSIP 20 in the home country using the protocol. Upon receiving the hookoff information, the ASP 22 connects the dial tone to the corresponding voice channel so that the subscriber can dial the call. The ASP 22, which is configured in the home country, is the main processor that manages the operation and maintenance inside the home country. TSL 24 performs all exchange functions in the home country.

Within the remote subscriber module is a test device TEC 30 and a ring supply RG 32. DLC 12 connects a Congestion Tone (C.T) to the subscriber when the trunk with the home station is occupied or broken. In addition, the main device of the system is a redundant structure to improve the reliability. In this way, the remote subscriber module is intended to economically accommodate remotely distributed subscribers, and has introduced the concept of separating the home subscriber stage into a remote location in order to emphasize economic feasibility while giving the same function as the home subscriber. Referring to Figure 2 will be described in detail the matching structure of the remote subscriber module and the mother station. FIG. 2 is a block diagram illustrating a matching structure between a general home station and a remote subscriber module, wherein two of the four subprocessors under the control of an Access Switching Subsystem for Subscriber / Trunk (ASS-S / T) are used for trunk matching. In other words, it is used as DCIP, and the remaining two subprocessors can be used as a mother subscriber matching processor (ASIP) or a remote subscriber module matching processor 20. The remote subscriber module matching processor 20 may have a subscriber interface matching function and a remote subscriber module matching function at the same time, and data between the remote subscriber module matching processor 20 and the remote subscriber module using a data link that is channel 16 of the PCM transmission path. Send / receive various IPCs required for processing, testing, maintenance, etc. using LAP-D protocol.

In the conventional all-electronic switching system consisting of the above-described components, the call service in the remote subscriber module was available only when the matching link with the home station was normal. This means that the call processing is not possible between subscribers in the remote subscriber module because not only the various resources (digital receiving device, tone device, etc.) necessary for call processing use the resources of the home station, but also the call processing control is controlled by ASP, which is the higher processor of the home station. . If the matching link is abnormal when the remote subscriber module is connected to the mother station, the remote subscriber module does not have the hardware device necessary for call processing and there is only a remote subscriber module processor (subscriber device controller) and no upper call processor. There was a problem that call service between subscribers in module is impossible.

An object of the present invention is to provide an apparatus and method for call processing in a remote subscriber module of an electronic switchboard, which enables an inter-subscriber call processing service in the remote subscriber module even when the matching link between the mother station and the remote subscriber module is abnormal. .

In order to achieve the above object, the present invention provides an exchange configured by matching a remote subscriber module and a switch mother station with a link so as to enable call service between internal subscribers between the remote subscriber modules in an abnormal state due to a link failure between the mother station and the remote subscriber module. The system includes a digit reception function for receiving digits from an internal subscriber and a tone supply function for supplying various tones to internal subscribers, and in case that a matching link between the remote subscriber module and a mother station is abnormal, A call processing method in a remote subscriber module that connects internal channels such that subscribers are internally switched, wherein the matching link between the remote subscriber module and the mother station is normal from the remote subscriber module through the link that is matched with the mother station. Internal subscribers belonging to Receiving and storing information; checking whether the matching link status with the home station is normal when the hookoff of the internal subscriber is detected; and valid internal to the internal calling subscriber if the matching link status with the mother station is abnormal. Assigning a channel and then connecting a dial tone, receiving and analyzing a called subscriber digit dialed by the internal calling subscriber, and if the analyzed called subscriber digit corresponds to an internal subscriber, the calling subscriber and the called subscriber. It is characterized in that the process of connecting the call channel between the incoming / outgoing subscriber by connecting the internal channel of the.

1 is a block diagram of an electronic switch system in which a conventional home station and a remote subscriber module are matched and configured.

2 is a block diagram illustrating a matching structure of a general home station and a remote subscriber module.

3 is a block diagram of an electronic switch system in which a mother station and a remote subscriber module according to the present invention are matched by a link.

4A and 4B are structural diagrams of an internal switching device of a subscriber control unit (SLCI) configured inside a remote subscriber module according to an embodiment of the present invention.

5 is a diagram illustrating transmission and reception of remote subscriber information between a mother station and a remote subscriber module according to an embodiment of the present invention.

6 is a digit input data map received in a DTF inside a subscriber control unit according to an embodiment of the present invention.

7A and 7B are flowcharts illustrating a call processing control procedure between internal subscribers of a remote subscriber module according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention, such as specific processing flows. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted. Also, in describing each of the drawings, like reference numerals refer to the same elements as much as possible even if shown in different drawings. Was made the same. It should be noted, however, that different reference numerals have been added to those components whose functions differ from those of the prior art.

3 is a block diagram of an electronic switch system in which a mother station and a remote subscriber module according to the present invention are matched by a link.

When the link matching between the home station and the remote subscriber module is normal, each component performs the operation described with reference to FIG. 1, and when the link matching between the home station and the remote subscriber module is abnormal, each component is described with reference to FIG. 1. In addition to the same function, the following function is performed by a specific component so that call service between subscribers in a remote subscriber module can be performed. First, the remote subscriber module processor 40 according to the present invention receives and analyzes the digits dialed by the internal subscriber through the subscriber line circuit interface (SLCI) 50 in addition to the functions described in FIG. It controls the supply of tones, requests and receives special (internal subscriber information) data from the home station, retains the data until the remote subscriber module processor is reinitialized, and receives the changed special data from the home station if necessary. If the link matching of the remote subscriber module is abnormal, it can play the role of ASP, which is the upper call processing controller of the mother station. The subscriber controller 50 is a matching device between the subscriber and the remote subscriber module processor, and has a digit receiving function and a tone function to enable call service between subscribers in the remote subscriber module when the matching link between the mother station and the remote subscriber module is abnormal.

4A and 4B are structural diagrams of an internal switching device of the subscriber control unit 50 according to an exemplary embodiment of the present invention, and show a time switch of the subscriber control unit 50 and show switching operations of the subscriber transmitter TX and the subscriber receiver RX. In more detail, when the link state with the mother station is normal, the subscriber transmitter 100 switches from the subscriber station STX0-STX15 to the output terminal 212 (MUX0-MUX7) to the mother station and is connected to the TSL 24 of the mother station. However, when the link state with the mother station is abnormal, the subscriber station 211 is switched to the subscriber receiver 222 through the intra junction channel 213. That is, the subscriber switching configuration of the SLCI 50 is configured to be internally switched between internal subscribers when the link state with the mother station is abnormal. The DFM channel 214 receives the digit dialed by the subscriber, and the remote subscriber module processor 40, which is the control processor, periodically scans the DFM channel 214 to detect the digit. 110 denotes a subscriber station (RX), and if the link state with the mother station is normal, the TSL 221 is connected to the subscriber 224. If the link state with the mother station according to the present invention is abnormal, switching of the transmitter 213 and the receiver 222 And internal matching channels (IJT0 to IJT3) 222 are switched to subscriber 224 stages. The tone supply unit 223 supplies various tones necessary for call processing to the corresponding subscribers, such as supplying dial tones to other internal subscribers when the internal subscriber picks up the receiver when the link status with the mother station is abnormal.

FIG. 5 is a diagram of special information transmission / reception of a mother station and a remote subscriber module showing a procedure of transmitting / receiving special information (remote subscriber information) of a mother station and a remote subscriber module according to an embodiment of the present invention. If the link status is normal, it indicates the transmission and reception of remote subscriber information (remote subscriber number assigned to the special number and special number) for call processing, and the subscriber information of the remote subscriber module (special information) to ASP 22 of the mother station as the remote subscriber module processor 40 is initialized. When requesting the notification (step 301), the ASP 22 notifies the remote subscriber module processor 40 of the information of the corresponding remote subscriber module (step 302). The subscriber module processor 40 is notified of the changed information (step 303).

6 is a digit input data map received in a DTF inside a subscriber control unit according to an embodiment of the present invention.

The data structure when an internal subscriber receives a dialed digit when the link state with the mother station is abnormal, and the remote subscriber module processor 40 periodically searches for the DFM 214 of FIG. 4A, and the digit dialed by the internal subscriber. Detect. BIT15 to BIT08 are data of MFR (Multi-Frequency Signal Receiver) 0, and BIT07 to BIT00 represent MFR 1. In the case shown in Fig. 6, it is valid only when D5 is one.

7A and 7B are flowcharts illustrating a call processing control procedure between internal subscribers in a remote subscriber module according to an embodiment of the present invention.

Transmitting / receiving special information with the home country through the link when the link with the home country is normal;

When the call service is detected and the internal subscriber hookoff is detected, checking whether the link status with the home station is normal;

Connecting a dial tone to the hooked-up internal subscriber when the link status with the home station is abnormal;

Receiving a digit of the called subscriber in the remote subscriber module;

After receiving the digits of the called subscriber, the process of connecting the call path between the incoming / outgoing subscriber in the remote subscriber module.

3-7B, the operation according to the preferred embodiment of the present invention will be described in detail.

In the case where the link state between the mother station and the remote subscriber module is abnormal, the call processing between subscribers in the remote subscriber module will be described in detail with reference to FIGS. 7A and 7B. Requests remote subscriber information to ASP 22 of the home country. Then, in step 402, the remote subscriber module processor 40 receives the remote subscriber information from the ASP 22 of the home station and stores the remote subscriber information in the remote subscriber module processor 40. Thereafter, in step 403, the remote subscriber module processor 40 drives a task for receiving a digit, for example, a 16 ms task. After performing the above process, an internal subscriber call service is performed at step 404. In step 405 and 406, the remote subscriber module processor 40 detects a change in the state of the internal subscriber. If it is recognized as a hookoff state, the remote subscriber module processor 40 proceeds to step 407, which is ready for dialing, and the hookoff is not detected when there is no change in the state of the internal subscriber. If not, the process returns to step 405 to continue detecting internal subscriber state changes. Then, in step 408, the remote subscriber module processor 40 checks the link state between the mother station and the remote subscriber module, and if it is normal, proceeds to step 409 to control normal call processing under the control of the mother station ASP 22, and then terminates. If the link status of the remote subscriber module is abnormal, the process proceeds to step 410 and transitions to an internal subscriber call processing step for starting internal subscriber call processing. Thereafter, in step 411, the remote subscriber module processor 40 receives one DFM channel (214 of FIG. 4A) inside the SLCI 50 for digit reception. If there is no free DMP channel, the controller proceeds to step 413 to connect the tone channel (eg, a busy tone) channel (223 of FIG. 4B) supplied to the calling subscriber to the calling subscriber. A tone, for example, a ringtone, is heard for an internal subscriber who is turned off. The tone stored in the internal ROM of the SLCI 50 is always supplied to the particular channel of 223 of FIG. If the hooked-up internal subscriber releases the handset in step 413, the remote subscriber module processor 40 ends the call in step 414. At this time, the remote subscriber module processor 40 initializes and ends various internal data. In step 411, if the DMP channel is allocated, the process proceeds to step 412, and it is checked whether there is a valid internal channel (IJT) (213 in FIG. 4A and 222 in FIG. 4B) for connecting the subscriber inside the remote subscriber module. If there is no valid internal channel for remote subscriber module internal subscriber connection, the remote subscriber module processor 40 releases the DMF channel allocated in step 411 and performs steps 413 and 414. However, if there is a valid internal channel for remote subscriber module internal subscriber connection as a result of the check, the process proceeds to step 415 and the remote subscriber module processor 40 connects and supplies a dial tone (223 of FIG. 4B) to the hooked internal subscriber. At this time, the allocated DFM channel is connected to the hooked-up internal calling subscriber to prepare for digit reception. In step 416, the remote subscriber module processor 40 detects the digit reception and releases the dial tone connected to the hooked-out internal calling subscriber when the first digit is received. Thereafter, in step 417, the remote subscriber module processor 40 detects whether the digit reception is completed, and if the digit reception is completed, proceeds to step 418. If the digit reception is not completed, the remote subscriber module processor 40 waits for completion of the digit reception. When the digit reception is completed, in step 418, the remote subscriber module processor 40 compares the received digit with internal subscriber information stored in the remote subscriber module processor 40 and searches whether the internal subscriber information is registered and the called subscriber line number. Then, in step 419, the remote subscriber module processor 40 checks the internal subscriber registration and the called party status. If the internal subscriber's unregistered or called party's status is not available (e.g. during a call, breakdown, etc.), proceed to step 420 to hear a ring tone to the hooked-out internal subscriber and release the allocated internal channel. do. Thereafter, in step 421, the remote subscriber module processor 40 hears a busy tone and initializes various data and terminates the call when the calling subscriber releases the handset. In step 419, if the call is available, the process proceeds to step 422, and the remote subscriber module processor 40 supplies a ring to the called party first, and connects a ring tone (223 in FIG. 4B) to the calling party. Thereafter, when the called subscriber hears the ring tone and lifts the handset, the ringer releases the ring connection supplied to the called party, releases the ringing tone connected to the calling party, and connects the intra channel to the busy state. Thereafter, in step 423, the remote subscriber module processor 40 maintains a busy state by allowing incoming / outgoing subscribers to perform mutual calls. Thereafter, in step 424, the remote subscriber module processor 40 checks whether the call is terminated and returns to step 423 if the call is not terminated. If the call ends, the remote subscriber module processor 40 proceeds to step 425 to release the internal channel and terminates the call.

In summary, the above-described embodiments of the present invention can be achieved if the remote subscriber module is not controlled from the mother station due to a matching link failure between the mother station and the remote subscriber module of the electronic switching center, and the call service between the subscribers in the remote subscriber module can be made. In addition to the conventional functions to the remote subscriber module processor 40 according to the present invention so as to receive and analyze the digits and control to supply the required tone, when the remote subscriber module processor is reinitialized by requesting and receiving special data to the mother station It maintains the data until it is received, and if necessary, receives the changed data from the mother station so that when the link matching between the mother station and the remote subscriber module is abnormal, it can perform the ASP function that is the upper call processing control unit of the mother station. In addition, the subscriber control unit 50, which is a matching device between the subscriber and the remote subscriber module processor, has added a digit reception function and a tone function to enable call service between subscribers in the remote subscriber module when the matching link between the home station and the remote subscriber module is abnormal. The electronic switch having this function performs a call service operation between the internal subscribers of the remote subscriber module as shown in FIGS. 7A and 7B under the control of the remote subscriber module processor 40 when the matching link state between the home station and the remote subscriber module is abnormal. Done.

As described above, the present invention enables call services between internal subscribers of the remote subscriber module even if a failure occurs in the matching link between the mother station and the remote subscriber module, so that the internal subscribers in the remote subscriber module may be in emergency during an emergency such as a fire or theft. There is an effect that can be contacted.

Claims (10)

In a switching system configured by matching a remote subscriber module and an electronic switching center with a link, the remote subscriber module performs call processing service between internal subscribers when the matching link between the remote subscriber module and the home station is abnormal. In the call processing device, A matching device between a subscriber interface to which the internal subscriber is connected and a remote subscriber module processor, the digital subscriber having a digit receiving function for receiving digits from the internal subscriber and a barrel supply function for supplying various tones to the internal subscriber. A subscriber controller for connecting an internal channel so that internal subscribers of the remote subscriber module are internally switched when the matching link between the module and the mother station is abnormal; When the matching link between the home station and the remote subscriber module to which it belongs is normal, the internal subscriber receives and stores information of the internal subscriber of the remote subscriber module to which it belongs, and the matching link between the remote subscriber module and the home station is abnormal. Receive and analyze the digits dialed by the internal subscriber through the digit receiving channel of the subscriber control unit, control the tone supply unit of the subscriber control unit to supply the necessary tone to the internal subscriber, and confirm the stored internal subscriber information. If the called subscriber corresponds to the internal subscriber, the call processing apparatus of the remote subscriber module of the electronic switchgear comprises a remote subscriber module processor which connects the internal channel of the called subscriber and the calling subscriber to perform a call processing service. . The method of claim 1, wherein the subscriber control unit And a subscriber transmitter and a subscriber receiver, and connecting internal channels such that internal subscribers of the remote subscriber module are switched internally when the matching link status of the mother station and the remote subscriber module is abnormal through switching control of the subscriber transmitter and the subscriber receiver. Call processing apparatus in the remote subscriber module of the electronic switchboard. 3. The subscriber transmitter of claim 2, wherein the subscriber transmitter of the subscriber controller And a DMP channel for receiving the digits dialed by the internal subscriber. The subscriber receiver of claim 2, wherein the subscriber receiver of the subscriber controller is controlled. And a tone supply unit for supplying various tones to the internal subscriber. It has a digit receiving function for receiving a digit from an internal subscriber and a tone supply function for supplying various tones to an internal subscriber in a switching system configured by matching a remote subscriber module with an exchange mother station by a link. A call processing method in a remote subscriber module for connecting an internal channel such that internal subscribers of the remote subscriber module are internally switched when a matching link is abnormal. Receiving and storing internal subscriber information belonging to the remote subscriber module from the home station through a link matched with the mother station when the matching link between the remote subscriber module and the mother station is normal; Checking whether a matching link with the home station is normal when the hookoff of the internal subscriber is detected; Assigning a valid internal channel to an internal originating subscriber and connecting a dial tone if the matching link status with the mother station is abnormal; Receiving and analyzing a called subscriber digit dialed by the internal calling subscriber; If the analyzed called party digit corresponds to an internal subscriber, a remote subscriber module of the electronic switchboard is configured to connect a call channel between the calling party and the called party by connecting an internal channel of the calling party and the called party. Call processing method in. In the switching system configured by matching the mother station and remote subscriber module of the exchange with a link, the subscriber interface with which the internal subscriber is connected and the remote subscriber module processor are matched, and the digital subscriber function and various tones receive the digits from the internal subscriber. And a subscriber supply unit for supplying the internal subscriber unit to connect internal channels to switch internally between the internal subscribers, and controlling the subscriber controllers to control internal subscribers if the matching link between the remote subscriber module and the mother station of the exchange is abnormal. A call processing method in a remote subscriber module having a remote subscriber module processor for performing a call processing service, the call processing method comprising: Requesting internal subscriber information belonging to the home station to the home station when the matching link with the home station of the exchange is normal; Receiving and registering the internal subscriber information from the home station through the matched link; Checking whether a matching link with the home station is normal when the hookoff of the internal subscriber is detected; Allocating a free DMP channel to an internal calling subscriber and connecting and supplying a dial tone if the matching link status with the mother station is abnormal; Stopping receiving the dial tone when the incoming subscriber digit dialed by the internal subscriber is received through the DMP channel, and analyzing the received digit; If the analyzed called party digit corresponds to the registered internal subscriber, checking whether the called party state is available for call connection; Providing a ring to the called subscriber and connecting a ringing tone to the internal calling subscriber if the called subscriber is available for call connection; Releasing the ring provided to the called subscriber, releasing the ringing tone connected to the internal calling subscriber when the called subscriber responds, and connecting an internal channel to connect a call path between the called / calling subscriber; And terminating the call and releasing the allocated internal channel when the call between the internal and external subscribers is terminated. The method of claim 6, And a step of checking whether there is a valid DMP reception channel and an internal channel when the link state with the mother station is abnormal. The method of claim 7, wherein And providing a ringing tone to the internal calling subscriber when there is no valid DMP reception channel and internal channel. The method of claim 6, And providing a ring tone to the internal calling subscriber when the called party cannot connect to the call. The method of claim 9, The state in which the called party cannot connect to the call is a state in which the called party is not registered in the internal subscriber information or the called subscriber state is busy and fixed.

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