KR20060070662A - Private branch exchange apparatus for seating remote extension subscriber - Google Patents

Abstract

The present invention relates to a private exchange, and more particularly, to a private exchange device for accepting long-distance extension subscribers that can accommodate extension subscribers located at long distances using digital data lines.

The above-described private switching device of the present invention comprises a private exchange for performing call connection control for an extension telephone, and a long-distance extension device connected to the private exchange with a digital transmission line and performing a call processing function interworking with the private exchange. Characterized in that it comprises a.

Private Exchange, Digital Transmission Channel, Digital Channel, T1, E1

Description

Private Branch Exchange apparatus for seating remote extension subscriber}

1 is a block diagram of a private exchange in the prior art,

2 is a flowchart illustrating a call connection process of the private exchange of FIG.

Figure 3 is a block diagram of a private exchange device according to an embodiment of the present invention,

FIG. 4 is a flowchart illustrating an incoming call connection process at a long-distance extension subscriber in the private switching device of FIG.

FIG. 5 is a flowchart illustrating an outgoing call connection process at a long-distance extension subscriber side in the private switching device of FIG. 3.

* Description of Major Symbols in Drawings *

10, 100: private exchange

11: extension subscriber processing unit 12: extension subscriber call processing unit

20: extension telephone

21: extension telephone 1 22: extension telephone 2

110: extension subscriber processing unit on the private exchange side

120: extension subscriber call processing unit

130: extension subscriber selection and channel management unit                 

140: extension subscriber DB

150: long-distance extension subscriber processing unit on the private exchange side

200: long distance extension device

210: long-distance extension subscriber processing unit on the long-distance extension device side

220: subscriber management unit

230: extension subscriber processing unit of the long-distance extension device side

300: private telephone extension telephone

400: long-distance extension device side extension telephone

The present invention relates to a private exchange, and more particularly, to a private exchange device for accepting long-distance extension subscribers that can accommodate extension subscribers located at long distances using digital data lines.

FIG. 1 is a block diagram of a private switch in the prior art, and FIG. 2 is a flowchart showing a call connection process in the private switch of FIG.

As shown in Fig. 1, the private exchange in the prior art analyzes, processes or calls information by receiving an event occurring in the extension subscriber and the subscriber subscriber processing unit 11 providing an interface with the extension telephone. The subscriber station call processing unit 12 for notifying the corresponding subscriber of the time is configured.                         

The private exchange in the above-described prior art performs a call connection by the process of FIG. 2, and the call connection process is described below by taking the case where the extension telephone 1 (21) performs the call connection to the extension telephone 2 as an example. Same as

When the above-mentioned extension telephone 1 (21) picks up the handset for outgoing, an off-hook signal is generated, and the subscriber subscriber processor 11 detects an off-hook signal and then detects the extension hook-up call processor 12. The off-hook signal is transmitted (S1). In this process, the off-hook signal is transmitted to the subscriber call processor 12 as an off-hook message when the extension telephone is a multi-function telephone, and is transmitted as an electrical signal in the case of a normal telephone.

Next, the extension subscriber call processor 12 receiving the off-hook signal in the above-described S1 process transmits a dial tone for call connection to the extension telephone 1 (21) and simultaneously receives the called party's telephone number from the extension telephone 1 (21). The alert prepares to receive the digit signal (S2).

After the S2 process, when the subscriber subscriber call processor 12 receives a digit signal having the telephone number information from the extension telephone 1 (21), the telephone receiver analyzes the telephone number to determine the destination extension telephone 2 (22) (S3). ), And analyzes the state of the receiving extension telephone 2 (22) (S4).

As a result of analyzing the state of the destination extension telephone 2 (22) in step S4, when the destination extension telephone 2 (22) is in a callable state (IDLE state), the extension subscriber call processing unit 12 is called extension telephone 2 (22). ) Transmits a ring signal to the extension telephone 1 (21) and ends the call connection process by transmitting a signal indicating that the receiving extension telephone 2 is currently ringing (S5).

On the contrary, when the receiving extension phone 2 (22) is in a call as a result of the state analysis of the receiving extension phone 2 (22) in step S4, it transmits a tone during the call and ends the call connection process (S6).

Prior art private exchanges that perform the configuration and operation described above are limited in distance to extension telephones. That is, in the case of a general telephone, it is about 7.5 km, and in the case of a multifunctional telephone such as a key phone, about 1.8 km is a limit of the distance that can be connected to a private exchange. Therefore, in the case of the private exchange of the prior art described above, when the extension telephones are not concentrated in one building but are separated from each other by distance, the private network must be configured in such a manner that several private exchanges are interlocked. Various extension functions to be used have a problem that can not be interlocked between systems.

In addition to the above-mentioned problem, the private exchange in the related art also has a problem in that when the user moves locally, the user cannot move to another system in another region while maintaining the current private telephone number.

Accordingly, the present invention is to solve the above-mentioned problems in the prior art, and connects a private exchanger and a long-distance station to a digital transmission line (SDH) such as a North American T1 or an European E1. It is an object of the present invention to provide a private exchange device for accommodating long-distance extension subscribers to accommodate a long-distance extension subscriber.

The private switching device of the present invention for achieving the above object, a private exchange for performing a call connection control for the extension telephone, the private exchange is connected to the digital transmission line and performs a call processing function interlocked with the private exchange. Characterized in that configured to include a long-range extension device.

The private exchange includes: a first extension subscriber processing unit providing an interface with the extension telephone, an extension subscriber call processing unit performing call processing of the extension telephone inputted through the first extension subscriber processing unit, and the extension subscriber call. When the processing unit requests a call connection to a long-distance extension telephone, an extension subscriber selection and channel management unit for allocating a channel of a digital transmission line, and an extension subscriber storing extension telephone information for providing the aggregation function of the extension subscriber selection and channel management unit. And a first long-range extension subscriber processor for transmitting the call connection signal and the voice call signal of the extension telephone to the long-range extension apparatus through a digital transmission line through a channel allocated by the extension subscriber selection and channel manager. It is characterized in that the configuration.

In addition, the above-mentioned long distance extension device, a second extension subscriber processing unit that provides an interface with the extension telephone connected to the long distance extension device, and the message for call connection by analyzing the information between the private exchange and the long distance extension device; And a second long-range extension subscriber processor for transmitting the call connection signal and the voice call signal of the extension telephone to the private exchange through a digital transmission line under the control of the subscriber management unit. It is characterized by.

The above-mentioned private exchange and the long-distance extension device are connected with a collection ratio of N: 1.

The digital transmission line connecting the first long-range extension subscriber processing unit and the second long-range extension subscriber processing unit has a data transmission rate of any one of the North American method or the European method.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings in accordance with an embodiment of the present invention.

Figure 3 is a block diagram showing a private exchange device according to an embodiment of the present invention.

As shown in FIG. 3, the private exchange apparatus 1 to which the plurality of extension telephones 300 and the long distance extension telephone 400 according to one embodiment of the present invention is connected is a private exchange 100 and a long distance extension apparatus ( 200 is connected to a digital transmission line, in particular an E1 line having 30 channels.

The private exchange 100 described above is inputted through the first extension subscriber processing unit 110 and the first extension subscriber processing unit 110 to provide an interface with the extension telephone 300 connected to the private exchange 100. Extension subscriber call processing unit 120 for performing call processing of the extension telephone and extension subscriber call processing unit 120 and the subscriber selection and channel management unit for allocating a channel of a digital transmission line when requesting a call connection to a long distance extension telephone. (130), the extension subscriber DB (140) for storing extension telephone information for providing the aggregation function of the extension subscriber selection and channel management unit 130, and the channel assigned by the extension subscriber selection and channel management unit (130) And a first long distance extension subscriber processing unit 150 for transmitting the call connection signal and the voice call signal of the extension telephone to the long distance extension apparatus through a digital transmission line.

In addition, the above-mentioned long distance extension apparatus 200 includes a second extension subscriber processor 230 that provides an interface with the extension telephone 400 connected to the long distance extension apparatus 200, and between the private exchange unit and the long distance extension apparatus. The subscriber management unit 220 determines a message transmission path for call connection by analyzing information, and the call connection signal and the voice call signal of the extension telephone are controlled through a digital transmission line under the control of the subscriber management unit 220. It is characterized in that it comprises a second long distance subscriber subscriber processing unit 210 to be transmitted to the exchange 100.

Here, the first extension subscriber processing unit 110 provides an interface with the extension telephone 300 connected to the private exchanger side, and the second extension subscriber processing unit 230 is connected to the extension telephone connected to the long distance extension apparatus 200 side. Provides an interface for

In addition, the extension subscriber call processing unit 120 receives and analyzes and processes an event generated by the extension telephones 300 and 400, or performs a call connection to a subscriber having corresponding information when a call is received.

Next, the extension subscriber selection and channel management unit 130 allocates the idle channel of the subscriber when the call is received for the aggregation cost, and allocates the corresponding extension telephone to the channel receiving the off-hook message when the call is made. .                     

In addition, the first long-range extension subscriber processing unit 150 of the private exchange 100 and the second long-range extension subscriber processing unit 210 of the long-range extension device 200 is provided with a digital E1 interface (Common Channel Signaling) having 30 channels. Sends and receives a message for the call connection between the private exchange 100 and the long-distance station 200 and the voice data signal for the voice call. In addition, the first long-range extension subscriber processing unit 150 and the second long-range extension subscriber processing unit 210 may configure a 30-channel digital E1 interface to have an aggregation ratio of N: 1 to provide a maximum of 30 * N channels. Make sure Herein, the digital E1 channel connecting the first long-range extension subscriber processing unit 150 and the second long-range extension subscriber processing unit 210 is for explaining an embodiment of the present invention, and the digital transmission line of the present invention is limited thereto. It is not.

Next, the subscriber management unit 220 of the long-range extension device 200 analyzes the information received from the private exchange in the long-range extension device to determine which subscriber should deliver the message, and conversely, the long-range extension device 200 Extension telephone number information inputted from the extension telephone 400 is transmitted to the private exchange through the second long-range extension subscriber processing unit 210.

4 and 5 are flow charts showing a call connection process as an operation process of the private switching device 1 of the present invention described above, and FIG. 4 is an extension of the extension telephone 400 on the side of the long-distance station apparatus 200. 5 is a flowchart illustrating a call processing process when receiving the call, and FIG. 5 is a flowchart illustrating a call processing process when the extension telephone 400 on the side of the long-range extension apparatus 200 transmits a call connection.                     

First, referring to FIG. 4, a call processing process in the case where the extension telephone 400 of the long-distance extension apparatus 200 receives a call connection is as follows.

When the extension telephone 300 picks up the handset for outgoing, an off-hook signal is generated. After the extension subscriber processor 110 detects an off-hook signal, the off-hook detected by the extension subscriber call processor 120 is detected. Transmit the signal (S110). In this process, the off-hook signal is transmitted to the subscriber call processor 120 as an off-hook message when the extension telephone is a multi-function telephone, and is transmitted as an electrical signal in the case of a normal telephone.

The extension subscriber call processing unit 120 receiving the off-hook signal in step S110, the destination extension telephone is a private switch 100 through the telephone number transmitted in the form of DTMF or message input from the extension telephone 300 according to the off-hook signal. It is determined whether the extension telephone 300 is connected to the extension 300 or the extension telephone 400 connected to the long-range extension device 200 (S120).

If the called party's telephone number information transmitted from the extension telephone 100 is the telephone number of the extension telephone 300 on the private exchange 100 side, FIG. In step S2, the call connection processing in the private switch 100 according to the related art is performed.

On the contrary, if the called party's telephone number information transmitted from the extension telephone 100 is the telephone number information of the extension telephone 400 of the long-distance extension apparatus 200, the extension subscriber call processor 120 extends the call. When the subscriber selection and channel management unit 130 requests the channel assignment of the digital transmission line, the subscriber selection and channel management unit 130 performs a digital connection between the private switch 100 and the long-range extension device 200 for call connection. The channel of the transmission line is allocated and the response message is transmitted to the subscriber subscriber call processor 120 (S130).

Thereafter, the extension subscriber call processor 120 transmits the ring signal to the first long-range extension subscriber processor 150 (S140). In addition, the first long-range extension subscriber processing unit 150 transfers the ring signal received from the extension subscriber call processing unit 120 to the second long-range extension subscriber processing unit 210 of the long-distance station 200 through the channel of the digital transmission line. Transmit (S140).

Upon receiving the ring signal from the private exchange 100, the second long-distance subscriber subscriber processor 210 transmits the received ring signal to the subscriber management unit 220 (S150).

The subscriber management unit receiving the ring signal by the S150 process searches for an extension telephone having the telephone number of the corresponding ring signal among the extension telephones of the long-distance extension apparatus 200 and transmits the ring signal to the corresponding extension telephone 400 ( S160).

After that, the ring signal is output from the extension telephone 400 that receives the ring signal, and the telephone of the extension telephone 300 of the private telephone exchange side 100 and the long-distance extension apparatus 200 is used as the user of the extension telephone picks up the handset. As the call is connected to be able to receive the service by the private exchange, the process of FIG. 4 ends (S170).

Next, referring to FIG. 5, a call processing process in the case where the extension telephone 400 of the long-distance extension device 200 transmits a call connection is as follows.

As shown in FIG. 5, when the handset is picked up by the extension telephone 400, the subscriber processor 230 of the long-distance extension apparatus 200 receives the off-hook signal of the extension telephone 400 and transmits the signal to the subscriber management unit 220. (S210).                     

Subsequently, the subscriber management unit 220 finds the telephone number of the extension telephone 400 by analyzing the physical channel from the off-hook signal and adds the subscriber's telephone number to the off-hook signal (S215). After allocating an idle channel among the digital E1 channels to the second long-range subscriber station 210, an off-hook signal is added to the corresponding channel information, and then transmitted to the second long-range subscriber station 210. S220).

The second long-distance subscriber subscriber processor 210 receiving the off-hook signal in step S220 transmits the off-hook message to the first long-distance subscriber subscriber processor 150 of the private exchange using the data channel (D-channel) (S225). ).

The first long-distance extension subscriber processor 150 receiving the off-hook message by the process S225 transmits the received off-hook message to the extension subscriber selection and channel manager 130 (S230).

Next, the extension subscriber selection and channel manager 130 analyzes the off-hook signal, allocates the information of the outgoing extension telephone 40 to the corresponding digital channel, and transmits the information to the extension subscriber call processor 120 (S235).

In step S235, the extension subscriber call processor 120 receiving the off-hook signal allocates a dial tone and prepares for digit reception. In this case, the above-described digit signal is transmitted as a voice signal in the case of a general telephone as described above, and the multifunction telephone is transmitted as a message (S240).

In step S240, the extension subscriber call processor 120, which is preparing for receiving a digit, analyzes the digit signal when the digit signal is received to determine the receiving extension telephone 300 (S245).                     

When the incoming extension telephone 300 is determined in step S245, the extension subscriber call processor 120 notifies the incoming extension telephone 300 of the incoming call notification (S250) and then monitors the state of the incoming extension telephone 300. (S. Transmitted through the subscriber processing unit 110 (S255).

If it is determined in step S255 that the extension telephone is idle, the ringer outputs a ring signal to the receiving extension telephone to perform a call connection and terminates the call connection process.

Unlike this, in step S255, the extension subscriber call processing unit outputs a busy tone to the caller extension telephone 400 when the idle state is not idle (S265).

The present invention described above provides an effect of extending a private exchange regardless of distance to use all the functions of an extension subscriber by allowing a system message to be delivered without modification using a data channel of a digital transmission line.

In addition, the present invention described above provides an effect of extending the subscriber capacity by extending the channel capacity of one digital transmission line by N times when the aggregation ratio is N: 1.

Claims (5)

A private exchange that performs call connection control for an extension telephone, And a long-distance extension device connected to the private exchange and a digital transmission line to perform a call processing function interworking with the private exchange. The private exchange of claim 1, A first extension subscriber processing unit providing an interface with the extension telephone; An extension subscriber call processing unit for performing call processing of the extension telephone inputted through the first extension subscriber processing unit; An extension subscriber selection and channel management unit for allocating a channel of a digital transmission line when the extension subscriber call processor requests a call connection to a long distance extension telephone; An extension subscriber DB for storing extension telephone information for selecting the extension subscriber and providing an aggregation function of the channel management unit; And a first long-range extension subscriber processor for transmitting the call connection signal and the voice call signal of the extension telephone to the long-distance extension apparatus through a channel allocated by the extension subscriber selection and channel manager. A private exchange device for accommodating long-distance extension subscribers. According to claim 1, The long-range extension device, A second extension subscriber processing unit providing an interface with an extension telephone connected to the long distance extension device; A subscriber management unit which analyzes information between the private exchange and the long-distance extension device and determines a message transfer path for call connection; And a second long-distance subscriber subscriber processor for transmitting the call connection signal and the voice call signal of the extension telephone to the private exchange through a digital transmission line under the control of the subscriber management unit. Private exchange device. The private exchange apparatus for accepting long-distance extension subscribers according to claim 1, wherein the private exchange unit and the long-distance station apparatus are connected to a digital transmission line having an aggregation ratio of N: 1. The private exchange apparatus for accepting long-distance extension subscribers according to claim 1, wherein the digital transmission line has any one of a digital transmission rate of a North American type digital level or a European type digital level.

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