KR19980038324A - Remote subscriber receiving device capable of internal call processing and control method - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs:

The present invention relates to a remote subscriber receiving apparatus capable of internal call processing and a control method thereof.

I. The technical problem the invention is trying to solve:

When the relay line connecting the remote subscriber receiver and the local exchange is cut off, the internal subscriber of the remote subscriber receiver is disconnected.

All. The gist of the solution of the invention:

Even if the relay line connecting the remote subscriber receiving device and the local exchange is cut off, the remote subscriber receiving device is implemented so that calls between internal subscribers of the remote subscriber receiving device can be made.

la. Important uses of the invention:

Remote subscriber receiver (RSM)

Description

Remote subscriber receiving device capable of internal call processing and control method

The present invention relates to a remote subscriber receiving apparatus connected to a local exchange, and more particularly, to a remote subscriber receiving apparatus and a control method for processing a call generated inside when a relay line between the remote subscriber receiving apparatus and the local exchange is blocked.

Electronic exchanger, a kind of national exchange, is the most basic system that solves human communication needs and is the most used device to date. The basic function of the exchange is to implement a voice call by accessing the necessary subscriber through a medium called a telephone. In addition, the subscriber close to the exchange can receive the necessary service by directly connecting the line (transmission distance varies depending on the thickness of the solid line) at the exchange. However, for the remote subscriber, the remote subscriber module (RSM) is connected to control the switch through the relay line to accommodate the internal subscriber to service the call.

The Remote Subscriber Module (RSM), which is connected by a trunk line with a conventional exchange, provides only basic functions to a large number of internal subscribers (typically accommodating 512 subscribers), and important functions such as call processing or tone generation can Provided according to the data transmitted / received.

Call processing of an internal subscriber will be described with reference to FIG. 1, which shows a typical connection of a conventional local exchange and a remote subscriber module (RSM).

For example, if a first telephone, which is an internal subscriber, dials a telephone number after hook-off for a call with a second telephone, the DTMF generated by the hook-off and dialing is directly, and a pulse signal is internal to the RSM 10. After detection, the signal is converted into a data signal and provided to the local exchange 12 through the relay line 14, and the local exchange 12 detects an incoming signal based on the provided signal. The local exchange 12 transmits the switching data to the RSM 10 through a predetermined line of the relay line 14 and the RSM 10 in accordance with the provided DTMF or pulse signal to connect the ring signal to a second telephone that is an internal subscriber. do. When the second telephone responds to the ring signal, the local exchange 12 provides a normal call service.

As described above, the DTMF or pulse signal generated by the internal subscriber of the conventional remote subscriber module (RSM) is detected by the receiving device provided in the local exchange 12, and the various tone signals provided to the internal subscriber are also included in the local exchange. From 12.

Conventionally, when a relay line connecting a remote subscriber module (RSM) and a switch is broken or a problem occurs, normal subscribers of the remote subscriber module (RSM) hook-off the phone when normal transmission / reception of data is not possible. Even if the dial tone was not heard, switching was not possible, and the call processing according to the internal subscribers was impossible until the relay line survived. In addition, when the relay line is added to solve the above-mentioned problems, an unreasonable problem occurs in structure and price.

It is therefore an object of the present invention to provide a Remote Subscriber Module (RSM) having a local exchange and an apparatus for processing internal calls when normal data transmission / reception is not made.

Another object of the present invention is to provide a method for processing an internal call when a normal exchange and a normal data transmission / reception are not performed.

1 is a typical connection diagram of a local exchange and a remote subscriber receiving device.

Figure 2 is a block diagram of a remote subscriber receiving apparatus according to an embodiment of the present invention.

3 is a control flow diagram for internal call processing according to an embodiment of the present invention.

4 is a subroutine of the internal call processing mode of FIG.

Hereinafter, a configuration according to an embodiment of the present invention will be described with reference to the drawings.

Configuration of the remote subscriber receiving apparatus according to an embodiment of the present invention is as shown in FIG.

Referring to Figure 2, the configuration, the control unit 110 controls the overall operation of the remote subscriber receiving apparatus. The subscriber circuit unit 112 receives a plurality of internal subscribers and interfaces signals transmitted / received from the internal subscribers, and detects the hook-off of the internal subscribers and provides them to the controller 110. The aggregation call connection unit 114 switches the subscriber circuit unit 112 to the corresponding part under the control of the controller 110. The trunk unit 116 connects the relay line 14 connected to the local exchange to the aggregation call connection unit 114, and processes information required for the other relay line. The tone generator 118 generates various tone signals under the control of the controller 110 and outputs the various tone signals to the aggregated call connection unit 114. The DTMF receiver 120 receives the DTMF received from the extension subscriber through the aggregation call connection unit 114, converts the DTMF into predetermined data, and transmits the DTMF to the controller 110. The integrated call connection unit 114, the tone generator 118, the DTMF receiver 120, and the subscriber circuit unit 112 may be integrated into one board of the subscriber circuit controller. In FIG. 2, the operation descriptions are separately illustrated for ease of operation, and the operation descriptions will be also provided below.

Call processing of the remote subscriber receiving apparatus according to an embodiment of the present invention is performed by the control flowchart shown in FIGS. 3 and 4.

3 illustrates a process of performing a call processing mode through a relay line and a process of performing an internal call processing mode according to the state of the relay line, and FIG. 4 is a state of an internal subscriber as a subroutine of the internal call processing mode of FIG. 3. And a process of generating a tone signal and connecting a call when an internal subscriber requests a call with the internal subscriber.

Hereinafter, an operation according to an embodiment of the present invention will be described in detail with reference to the above-described configuration.

The control unit 110 determines whether the relay line 14 connected to the local exchange 12 is normal in step 310 of FIG. 3. If it is determined in step 310 that the relay line 14 is in a normal state, the controller 110 proceeds to step 312 to perform a call processing mode through the conventional relay line 14 which has been conventionally performed. The call processing mode through the conventional relay line 14 will be described step by step.

First, when the internal subscriber is hooked off, the controller 110 detects the internal subscriber hooked off through the subscriber circuit unit 112 and transmits the internal subscriber to the local exchange 12 through the trunk 116. The local exchange 12 transmits a dial tone to the remote subscriber accommodation apparatus 10 and connects it to an internal subscriber. When the internal subscriber inputs a numeric key corresponding to a telephone number in response to the dial tone, the entered number is entered. The DTMF corresponding to the key is directly transmitted, and the pulse signal is transmitted to the local exchange 12 as a data signal after detection in the RSM 10. The local exchange 12 sends data to the relay line 14 when the RSM 10 is an internal call according to the transmitted DTMF or pulse signal, and transmits a ring tone to the counterpart phone in the RSM 10 to transmit / receive voice. This is a procedure that takes place when the relay line 14 is normal.

However, if it is determined in step 310 that the relay line 14 is not in a normal state, the controller 110 proceeds to step 314 to perform the internal call processing mode.

The internal call processing mode will be described step by step with reference to the subroutine of FIG.

The control unit 110 detects the hook-off of the internal subscriber through the subscriber circuit unit 112 in step 410. The detection of the hook-off is detected by reading the hook-off bit set by the subscriber circuit section 112. If the hook-off is detected, the control unit 110 proceeds to step 412 and transmits a dial tone. The dial tone is generated by the control unit 110 controlling the tone generating unit 118, the generated dial tone is the hook-off through the aggregated call connection portion 114 switched by the control of the control unit 110 To internal subscribers.

The calling internal subscriber hears the dial tone and then dials the telephone number to call. The control unit 110 detects whether the dialed telephone number is received in step 414. When the telephone of the calling internal subscriber is a dial-pulse method, the calling internal subscriber detects the hook-off of the internal subscriber provided in the subscriber circuit unit 112. However, if the telephone of the calling internal subscriber is a multifrequency code (MFC) method, it is detected through the DTMF receiver 120. The DTMF receiver 120 reads 16 DTMF data as 4 bits of data simultaneously using the accessible mode of the DTMF generated by the subscriber and transmits the data to the control unit 110 at the same time. Do it. If the reception of the telephone number is not detected in step 414, the controller 110 proceeds to step 418 until it is determined in step 416 that the predetermined time has elapsed. When the control unit 110 proceeds to step 418, the handset provided in the phone of the internal subscriber is considered to be left, and the tone generator 118 is controlled to send out the receiver tones.

However, if the reception of the telephone number is detected in step 414, the controller 110 proceeds to step 420. In step 420, the controller 110 analyzes the received phone number. Analyzing the telephone number is for determining whether the telephone number is a telephone number designating an internal subscriber. The process of analyzing the telephone number is analyzed by comparing the received telephone number with a registered internal subscriber telephone number. In step 422, the controller 110 determines whether the analyzed phone number is an internal subscriber, and if it is determined that it is an internal subscriber, the controller 110 proceeds to step 426. If the control unit 110 proceeds to step 424, it determines that the call to the other station through the national exchange 12 and the relay line 14 is not in a normal state, so the control unit 110 controls the tone generator 118 to the calling internal subscriber. (14) It generates a trunk runaway sound that indicates unusability. The generated trunk line congestion sound is provided to the calling internal subscriber through the aggregation call connection unit 114 and the subscriber circuit unit 112. If it is determined in step 422 that the subscriber is an internal subscriber, the controller 110 determines whether the corresponding subscriber is busy in step 426. If it is determined that the call is busy in step 426, the tone generating unit 18 is controlled to transmit the busy tone. Send ringback tone. In response to the ring signal, whether the corresponding subscriber is hooked off is detected in step 434, and in step 436, it is detected whether the calling subscriber is hooked on. If the hook-off of the called subscriber is detected in step 434, the controller 110 proceeds to step 438 to connect the call path. The call path is formed by the control unit 110 controls the collective call connection unit 114.

If the broken or disconnected relay line 14 is recovered during the execution of the internal call processing mode, the dial tone or call processing according to the call processing mode through the link is performed.

As described above, by implementing the remote subscriber accommodation apparatus, it is possible to improve the call success rate for the remote subscribers, thereby providing a better service.

Claims (5)

In the remote subscriber receiving device for relaying the remote subscriber and the local exchange through a relay line, A control unit controlling an exchange function between the remote subscribers when a normal relay is not performed through a relay line; A subscriber circuit unit for detecting a hook-off of the remote subscriber; Tone generating unit for generating various tones generated by performing the exchange function under the control of the controller, A DTMF receiver for detecting a DTMF received from the remote subscriber; Under the control of the control unit is a remote subscriber receiving apparatus capable of internal call processing, characterized in that consisting of a converged call connection for interconnecting the remote subscribers. The subscriber circuit unit for detecting a hook-off of a remote subscriber, a tone generating unit for generating various tones, a DTMF receiving unit for detecting a received DTMF, and an aggregated call connection unit for switching to form a call loop are connected to each other. A method of processing an internal call in a remote subscriber receiving device relaying a remote subscriber and a local exchange, If the normal relay is not performed by the relay line, the internal call processing method through the remote subscriber receiving device, characterized in that for performing the exchange function between the remote subscriber, which is an internal subscriber. The method of claim 2, And transmitting a relay line congestion sound by controlling the tone generator when a call request from the remote subscriber is generated through the local exchange. The subscriber circuit unit for detecting a hook-off of a remote subscriber, a tone generating unit for generating various tones, a DTMF receiving unit for detecting a received DTMF, and an aggregated call connection unit for switching to form a call loop are connected to each other. A method of processing an internal call in a remote subscriber receiving device relaying a remote subscriber and a local exchange, A call request detection process of detecting a hook-off of the remote subscriber through the subscriber circuit unit when the normal relay is not performed by the relay line; A phone number input request process for transmitting a dial tone by controlling the tone generator when the hook-off is detected; A phone number receiving process for receiving a phone number received in response to the dial tone; A call connection process of transmitting a tone for a call connection by controlling the tone generator when the phone number is a phone number corresponding to a remote subscriber connected to the remote subscriber accommodation device; And a call performing process of forming a call loop by controlling the converged call connection part when the called party hooks off in response to the tone. The method of claim 4, wherein And transmitting a relay line congestion sound by controlling the tone generator when a call request from the remote subscriber is generated through the local exchange.