KR20060055929A - Subscriber Line Occupancy Device and Method of Private Switching - Google Patents

Abstract

The present invention provides a subscriber line occupancy apparatus and method for a private exchange, comprising: a connection portion for connecting a subscriber line from a local exchange, detecting a ring and tone, and occupying and restoring a loop; A relay line call processing unit connected to the connection unit to perform a main processor function of a private exchange and to perform DIL relay line call processing; A bus processing unit under control of the relay line call processing unit and performing a message transmission between the relay line call processing unit and the connection unit; A call path unit in charge of a call path between the relay line call processing unit and the connection unit; Under the control of the relay line call processing unit, and configured to include a monitoring unit for detecting the state of the DIL subscriber in real time to perform the forced loop occupancy and forced loop release function for the connection unit, by connecting the subscriber line from the local exchange to receive only When a private exchange that detects a ring detects a ring and the DIL subscribers are all on the call and cannot reach the call, the DIL relay line is forcibly occupied by the DIL relay line so that the first calling subscriber can hear the call instead of the ring tone. If it is possible to recover the forced occupied DIL relay line will be able to play the ringing tone.

Description

Apparatus and method for occupation of subscriber line in private branch exchange

1 is a block diagram of a conventional private exchange and its neighboring blocks,

2 is a flowchart illustrating a subscriber line occupation method of a conventional private exchange;

3 is a block diagram of an apparatus for occupying a subscriber line of a private exchange according to the present invention;

4 is a flowchart illustrating a subscriber line occupation method of the private exchange according to the present invention.

Explanation of symbols on the main parts of the drawings

10: local switching module 11: relay line call processing unit

12: bus processing unit 13: call path

14: monitoring unit 15: database

20: connection part 30: local exchange

40: subscriber terminal

The present invention relates to an apparatus and a method for occupying a subscriber line of a private exchange. Particularly, all direct in line (DIL) subscribers are busy when detecting a ring in a private exchange used for exclusive reception by connecting a subscriber line from a local exchange. Subsequently, if the call cannot be received, the DIL relay line is forcibly occupied so that the first calling subscriber can hear the busy tone instead of the ring tone. If the call can be received, the forcible DIL relay line is restored to recover the ring tone. A subscriber line occupancy apparatus of a private exchange and a method thereof suitable for the following.

In general, a private branch exchange (PBX) is a kind of subscribing telephone and means an internal telephone exchange facility and an extension telephone installed in a premises such as a public office or a company. This exchange serves to connect trunk lines and stations to each other by means of telephone lines (or trunk lines) of the on-site exchange facilities and the belonging switching handling sections. Increasing the use of telephone exchanges used to relay telephone networks, including data or integrating voice and data communication in offices, is being used for network construction with local area networks (LANs). High line efficiency and high noise enable high quality data communication.

These private exchanges may also include or include separate Private Automatic Branch Exchanges (PABXs). In general, PABXs are exchanges based on automatic communication between stations of the local exchanges. Outgoing connections are usually direct outward dialing (DOD), but connections between external subscribers and extension subscribers are either manually connected via a transit station, or even incoming calls may be direct inward dialing (DID).

1 is a block diagram of a conventional private exchange and its neighboring blocks.

As shown therein, a connection (Analog Trunk Circuit, ATC) 20 for connecting a subscriber line from the local exchange 30 to sense a ring and tone, occupying and recovering a loop; A relay line call processing unit (11) connected to the connection unit (20) to perform a main processor function of the private exchange and to perform DIL relay line call processing; Under the control of the relay line call processing unit 11, a bus processing unit for transmitting a message between a local switching module (LSM) 10, which is a main processor board of the private exchange, and the connection unit 20 ( 12); The main circuit board including the relay line call processing unit 11 and the call path unit 13 that is in charge of the call path between the connection unit 20 is configured.

Here, reference numeral 10 denotes a local switching module (LSM) of a private exchange having the relay line call processing unit 11, the bus processing unit 12, and the call path unit 13, and 40 is connected to the local exchange 30. A subscriber station that can be used by the originating subscriber.

2 is a flowchart illustrating a subscriber line occupation method of a conventional private exchange.

As shown in the figure, when the first originating subscriber terminal 40 attempts to make a call to the local exchange 30, the domestic exchange 30 sends a ring tone to the first originating subscriber terminal 40 and connects the connection unit 20. Transmitting ring detection signals to the relay line call processing unit 11 in the private exchange through ST1 to ST4; Determining whether a called party can be called by the relay line call processor (11) after transmitting the ring detection signal (ST5); When the called subscriber can receive the call, the ring is transmitted to allow the call to be performed. If all the callers are in a call and the call is impossible, a loop command is issued to the connection part 20 to transmit an off-hook to the local exchange 30. In step 30, the connection is performed by the call, the charging is started, and then a call tone is transmitted to the first calling subscriber terminal 40 (ST6 to ST9).

The operation of the prior art will be described in detail with reference to the accompanying drawings.

First, the originating subscriber attempts to make a call to the local exchange 30 using the subscriber station 40 (ST1).

Thus, if the call to the subscriber line connected to the private exchange originates from the first originating subscriber terminal 40, the local exchange 30 sends a ring to the connection 20 (ST2) and the first originating subscriber terminal 40. Send a ring tone (ST3).

Then, the connection unit 20 of the private exchange detects the ring which has been inserted for a predetermined time, and transmits a ring detection signal to the relay line call processing unit 11 through the bus processing unit 12 (ST4).

In this way, the relay line call processing unit 11 that has received the ring detection signal finds the DIL subscriber and determines whether the called subscriber is available (ST5).

So, if the called subscriber is available, the ring is transmitted to make the call.

If all of the called subscribers are busy and the call is impossible, a loop command is given to the connection unit 20 through the bus processor 12 to inform the first calling subscriber terminal 40 that the call is in progress (ST6).                         

Then, the connection unit 20 transmits an off-hook to the local exchange 30 (ST7), and allows the connection with the first originating subscriber terminal 40 to be performed by the national exchange 30 in a call and starts charging (ST8). .

Then, the relay line call processor 11 transmits a call tone to the first calling subscriber terminal 40 (ST9).

However, this conventional technology has the following problems.

That is, there is no problem at all when the DIL subscriber of the private exchange is available, but if the incoming call is not possible, the first calling subscriber hears a ring tone briefly and then hears a ringing tone. There was a problem.

This is because when the ring is inserted into the connection unit 20, the call is received by the first originating subscriber because the call is received from the point of view of the local exchange 30, and there is no incoming subscriber in the relay line call processing unit 11 or the incoming call is received. When the subscriber is in a busy state, the call path unit 13 has no choice but to use the call path unit 13 to give a ringing tone to the first calling subscriber, and the DIL relay line must be looped to form a call path. 30) From the standpoint, off-hook is detected and responded to the billing process.

Therefore, in the prior art, accurate charging service was difficult, and there was a disadvantage that an abnormal charging problem occurred.

 Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to connect all subscriber lines from a local exchange and to detect a ring in a private exchange that is used exclusively for incoming calls. If the call cannot be received because the call is in progress, the DIL relay line is forcibly occupied so that the caller can send the call instead of the ring tone.If the call can be received, the ring tone is transmitted by restoring the forced DIL relay line. The present invention provides a subscriber line occupancy apparatus of a private exchange and a method thereof.

In order to achieve the above object, a subscriber line occupancy apparatus of a private exchange according to an embodiment of the present invention is provided.

A connection for connecting the subscriber line from the local exchange to detect ring and tone, occupy and recover the loop; A relay line call processing unit connected to the connection unit to perform a main processor function of a private exchange and to perform DIL relay line call processing; A bus processing unit under control of the relay line call processing unit and performing a message transmission between the relay line call processing unit and the connection unit; A call path unit in charge of a call path between the relay line call processing unit and the connection unit; The technical feature of the present invention is that it comprises a monitoring unit under the control of the relay line call processing unit, and detects the state of the DIL subscriber in real time to perform the forced loop occupancy and forced loop release function for the connection.

In order to achieve the above object, a subscriber line occupation method of a private exchange according to an embodiment of the present invention is provided.                         

A first step of the monitoring unit determining whether the called subscriber is using the subscriber line; A second step of forcibly occupying the loop by transmitting a forced loop occupancy message from the monitoring unit to the access unit when the called subscriber is using all of the subscriber lines; And a third step of releasing the occupancy of the loop by transmitting a forced loop release message from the monitoring unit to the accessing unit when the subscriber is absent from the called subscriber.

Hereinafter, an embodiment according to the present invention, a subscriber line occupancy apparatus of a private exchange, and a method thereof will be described with reference to the accompanying drawings.

3 is a block diagram of a subscriber line occupation apparatus of a private switch according to the present invention.

As shown therein, a connection (Analog Trunk Circuit, ATC) 20 for connecting a subscriber line from the local exchange 30 to sense a ring and tone, occupying and recovering a loop; A relay line call processing unit (11) connected to the connection unit (20) to perform a main processor function of the private exchange and to perform DIL relay line call processing; A bus processor (12) under the control of the relay line call processor (11) and performing message transmission between the relay line call processor (11) and the connection unit (20); A call path unit (13) in charge of a call path between the relay line call processing unit (11) and the connection unit (20); Under the control of the relay line call processing unit 11, and comprises a monitoring unit 14 for detecting the state of the DIL subscriber in real time to perform the forced loop occupation and forced loop release function for the connection unit 20.

The monitoring unit 14 is configured to further include a database (Data Base Management System, DBMS) 15 for storing DIL subscriber information for each DIL group, and for storing the DIL group number accommodated for each subscriber.

The monitoring unit 14 checks the DIL group number accommodated by each subscriber stored in the database 15 when the DIL subscriber picks up the handset or changes to a busy state in which the ring is received. Check if the call is busy, characterized in that for transmitting the forced loop occupancy message to the connection unit 20.

The monitoring unit 14 checks the DIL group number accommodated by the subscribers stored in the database 15 when the DIL subscriber changes to the IDLE state by dropping the handset. If it is characterized in that for transmitting the forced loop release message to the connection unit 20.

4 is a flowchart illustrating a subscriber line occupation method of the private exchange according to the present invention.

As shown therein, a first step ST11 in which the monitoring unit 14 determines whether the called subscriber is using the subscriber line; A second step (ST12 to ST16) of forcibly occupying the loop by transmitting a forced loop occupancy message from the monitoring unit 14 to the connection unit 20 when the called subscriber is using all of the subscriber lines; A third step (ST17 to ST23) of releasing the occupancy of the loop by transmitting a forced loop release message from the monitoring unit 14 to the connection unit 20 when there is a subscriber (IDLE) in the called subscriber; Perform.

In the second step, if the called subscriber is using all of the subscriber lines, the monitoring unit 14 transmits a forced occupancy message to the connection unit 20 (ST12) (ST13); The off-hook is transmitted from the connection unit 20 to the local exchange 30, and when the local exchange 30 receives the originating attempt from the first originating subscriber terminal 40, the first exchange subscriber from the local exchange 30 is received. It includes a step (ST14 ~ ST16) to not send a chord sound to the terminal 40.

In the third step, if there is a subscriber (IDLE) at the called subscriber, transmitting from the monitoring unit (14) to the connection unit (20) release the seizure message (ST17) (ST18); When the on-hook is transmitted from the connection unit 20 to the local exchange 30, and the local exchange 30 receives the call attempt from the first originating subscriber terminal 40, the first exchange subscriber from the local exchange 30 is received. And transmitting the chord sound to the terminal 40 (ST19 to ST23).

Referring to the accompanying drawings, the operation of the subscriber line occupancy apparatus and method of the private exchange according to the present invention configured as described above will be described in detail as follows.

First, when the DIL subscribers are all in a call and cannot receive a call when detecting a ring, the present invention forcibly occupies the DIL relay line so that a busy tone can be sent to the first calling subscriber, and when the call can be received. The purpose of this study was to restore the forcibly occupied DIL relay line and to play the ringing tone.                     

Thus, the connection unit 20 connects the subscriber line from the local exchange 30 to detect the ring and tone, occupy the loop and recover.

In addition, the local switching module 10 further includes a monitoring unit 14 in addition to the relay line call processing unit 11, the bus processing unit 12, and the call path unit 13. The monitoring unit 14 may further include a database 15.

Thus, the relay line call processing unit 11 is connected to the connection unit 20 to perform the main processor function of the private exchange, and performs the DIL relay line call processing.

The bus processor 12 is controlled by the relay line call processor 11 and transmits a message between the local switching module 10 including the relay line call processor 12 and the connection unit 20.

The call path unit 13 is in charge of the call path between the relay line call processing unit 11 and the connection unit 20.

In addition, the monitoring unit 14 is under the control of the relay line call processing unit 11, and detects the state of the DIL subscriber in real time to perform the forced loop occupancy and forced loop release function for the connection unit 20.

In the monitoring unit 14, the database 15 stores the DIL subscriber information for each DIL group, and stores the DIL group number accommodated for each subscriber.

Thus, when the DIL subscriber changes to a busy state where the DIL subscriber picks up the handset or the ring is received, the monitoring unit 14 confirms whether all subscribers of the group are busy by checking the DIL group number accommodated by each subscriber stored in the database 15. If both are busy, the forced loop occupancy message is transmitted to the connection unit 20.                     

In addition, the monitoring unit 14 checks the DIL group number accommodated for each subscriber stored in the database 15 when the DIL subscriber changes to the IDLE state by dropping the handset. 20) to send a forced loop release message.

Referring to the operation of the present invention in more detail as follows.

First, in the present invention, the DIL subscribers check whether all the subscribers of the DIL subscriber group to which they belong are busy when the state transitions to BUSY, and issue a forced loop occupancy message to the connection when they are all busy. When a transition is made to the IDLE) state, a forced loop release message is issued.

To this end, the monitoring unit 14 first determines whether the called subscriber is using the subscriber line (ST11).

Thus, if the called subscriber is using all of the subscriber lines, the monitoring unit 14 transmits a forced loop occupancy message to the connection unit 20 to forcibly occupy the loop.

In other words, if the called subscriber is using all of the subscriber lines (ST12), the monitoring unit 14 transmits a forced occupancy message to the connection unit 20 (ST13).

And the off-hook is transmitted from the connection part 20 to the local exchange 30 (ST14).

In this state, if an attempt is made to make a call to the local exchange 30 at the first calling subscriber terminal 40 (ST15), the local switching device 30 does not transmit a ring tone to the first calling subscriber terminal 40 (ST16). ).

On the other hand, if there is a subscriber (IDLE) in the receiving subscriber, the monitoring unit 14 releases the loop occupancy by sending a forced loop release message to the connection unit 20.

That is, if there is a subscriber who is idle (IDLE) at the called subscriber (ST17), the monitoring unit 14 transmits an occupancy release message to the connection unit 20 (ST18).

Then, the on-hook is transmitted from the connecting portion 20 to the local exchange 30 (ST19).

Then, when the national exchange 30 receives the originating attempt from the first originating subscriber terminal 40 (ST20), the national exchange 30 sends a ring to the connection 20 (ST21) and the first originating subscriber terminal 40 Sends out a chord sound (ST22). The relay line call processor 11 receives a ring detection signal from the connection unit 20 (ST23).

In addition, when the connection part 20 is roped for a long time when occupied by a forced loop, it is recognized as a failure or a long time receiver neglect according to the local exchange 30, and thus a failure announcement rather than a ring tone may be sent to the first calling subscriber terminal 40. In the connection part 20 itself, the loop release and the loop occupancy operation are periodically repeated.

As such, when the DIL subscribers are all busy and cannot receive calls when the ring is detected by the private exchange connected to the subscriber line from the local exchange, the incoming call is not a ringing tone to the first calling subscriber. If the DIL relay line is forcibly occupied for transmission, and the call can be received, the DIL relay line forcibly occupied will be restored to make a ringing tone.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the subscriber line occupancy apparatus and method of the private exchange according to the present invention connects the subscriber line from the local exchange and detects the ring in the private exchange used for incoming calls only. If the incoming call cannot be received, the DIL relay line is forcibly occupied by the caller instead of the ringing tone. If the call can be received, the forced DIL relay line is restored to recover the ringing tone. It can be effective.

Therefore, the present invention provides more accurate service to the original calling subscriber, and has the effect of solving the abnormal charging problem.

Claims (7)

A connection for connecting the subscriber line from the local exchange to detect ring and tone, occupy and recover the loop; A relay line call processing unit connected to the connection unit to perform a main processor function of a private exchange and to perform DIL relay line call processing; A bus processing unit under control of the relay line call processing unit and performing a message transmission between the relay line call processing unit and the connection unit; A call path unit in charge of a call path between the relay line call processing unit and the connection unit; And a monitoring unit configured to receive the control of the relay line call processing unit and detect a state of a DIL subscriber in real time to perform a forced loop occupation and a forced loop release function for the connection unit. The method of claim 1, wherein the monitoring unit, And a database for storing DIL subscriber information for each DIL group and storing a DIL group number accommodated for each subscriber. The method of claim 2, wherein the monitoring unit, When a DIL subscriber picks up a handset or changes to busy status when a ring is received, checks the DIL group number accommodated by each subscriber stored in the database to see if all the subscribers of the group are busy. And a subscriber line occupation device of a private exchange. The method of claim 2, wherein the monitoring unit, When the DIL subscriber changes to the resting state by dropping the handset, it checks the DIL group number accommodated for each subscriber stored in the database, and if there is one resting subscriber among the subscribers of the group, a forced loop release message is transmitted to the access unit. Subscriber line occupancy device in a private exchange. A first step of the monitoring unit determining whether the called subscriber is using the subscriber line; A second step of forcibly occupying the loop by transmitting a forced loop occupancy message from the monitoring unit to the access unit when the called subscriber is using all of the subscriber lines; And a third step of releasing the occupancy of the loop by transmitting a forced loop release message from the monitoring unit to the access unit when there is a resting subscriber at the called subscriber. The method of claim 5, wherein the second step, If the called subscriber is using all of the subscriber lines, transmitting a forced occupancy message from the monitoring unit to the access unit; Transmitting off-hook to the local exchange by the connection unit, so that the local exchange does not transmit a ringing tone to the first originating subscriber terminal when receiving the originating attempt from the first originating subscriber terminal. Method of occupying subscriber line of private exchange. 7. The method of claim 5, wherein the third step comprises: Transmitting, by the monitoring unit, an occupancy release message to the access unit when there is a resting subscriber at the called subscriber; Transmitting an on-hook to the local exchange by transmitting the on-hook from the connection to the first exchange subscriber terminal when the domestic exchange receives a call attempt from the first originating subscriber terminal. A method of occupying a subscriber line of a private exchange.

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