KR19990041503A - Apparatus and method for using Citi-2 trunk line and general trunk line at premises exchange - Google Patents

Abstract

The present invention relates to a CT-2 (The Second Generation of Cordless Telephone), and more particularly, to connect the CT-2 with the Private Branch eXchange, connected to the CT-2 and the branch exchange The present invention relates to an apparatus and method for selecting and using CT-2 trunk lines and general trunk lines in a premises exchange where a terminal can select and use economical calls between general trunk lines and CT-2 trunk lines.

Conventional call-only terminals can only make outgoing calls and cannot use regular trunk lines, and internal exchanges are connected to public telephone networks or ISDN trunk lines via wires, and thus cannot use CT-2 trunk lines that use public telephone networks via radio. In many cases, it is not efficient, and there are differences in call charges when using CT-2 trunk lines or general trunk lines in certain regions, and thus there is an uneconomic problem.

The present invention enables the connection between the local exchange and the call-only terminal, the terminal connected to the call-only terminal and the local exchange selects a trunk line that can make economical calls between the general trunk line and the CT-2 trunk line to make a call through the trunk line. By making it possible to call, it provides an efficient and economic means of currency.

Description

Apparatus and method for using Citi-2 trunk line and general trunk line at premises exchange

The present invention relates to a CT-2 (The Second Generation of Cordless Telephone), in particular, it is possible to connect the outgoing dedicated terminal with the private branch eXchange, connected to the outgoing dedicated terminal and the branch exchange The present invention relates to an apparatus and method for selecting and using CT-2 trunk lines and general trunk lines in a premises exchange where a terminal can select and use economical calls between general trunk lines and CT-2 trunk lines.

In general, a call-only terminal, that is, a cordless telephone (CT), is the first generation of cordless telephone (CT-1), and a second generation of CT-2 (the second generation of cordless telephone). It is divided into cordless telephone (outdoor wireless public telephone) and third generation CT-3 (The Third Generation of Cordless Telephone). The CT-1 is an analog cordless phone, often a cordless phone we encounter. While the handset is inexpensive, it can only be used for tens of meters from a fixed body. The CT-2 is a digital cordless phone, also known as Telepoint, which is the predecessor of personal cellular communications. First developed in the UK, the CT-2 is an outgoing mobile phone. CT-3 / DECT is a more advanced type of wireless telephone compared to CT-2, which allows incoming and outgoing calls.DECT (Digital European Cordless Telephone) is TDMA (Time Division Multiple Access) / TDD (Time). Division Diplex (Time Division Duplex), which operates in the 1.8 GHz frequency band. In particular, the CT-2 is, as described above, dedicated to outgoing calls limited in location to the second generation codeless telephone technology. CT-2 service, the first step of personal mobile communication service, is a small portable terminal that connects a wireless base station and an existing public switched telephone network while traveling in a public place in the city. Unlike mobile phones in the UK, the CT-2 service, which started by extending the range of home wireless telephones to the outdoors, is an outgoing mobile phone service called wireless public telephone.

On the other hand, the conventional premises exchange system, as shown in the accompanying drawings Figure 1, ISDN trunk line matching unit (Integrated Services Digital Network; 10), general trunk line matching unit 20, station matching unit 30, switching unit ( 40), a DTMF recognition unit (Dual Tone Mixed Frequency) 50 and a central control unit 60 are provided.

The ISDN trunk line matching unit 10 matches the switching unit 40 with the ISDN trunk line to provide a comprehensive information and communication service. The general trunk line matching unit 20 matches the switching unit 40 with an external public telephone network to allow a telephone call. The station matching unit 30 matches the switching unit 40 with a plurality of terminals, and the switching unit 40 establishes or releases a call path between a general trunk line or an ISDN trunk line with a plurality of terminals under the control of the central controller 60. do. The DTMF recognition unit 50 detects the DTMF signal applied from the terminal and applies it to the central controller 60. The central controller 60 controls the overall operation of the premises exchange, and in particular, translates the DTMF signal applied from the DTMF recognition unit 50 to determine the operation of the premises exchange corresponding thereto.

The operation of the premises exchange configured as described above first receives the interpreted telephone number, interprets it, and selects and reserves a route to the premises terminal with the telephone number. At this time, when a switch or the like is used for another call or the other party is busy, the busy signal is sent to the caller. In addition, when the other party responds, the other party detects this and connects the two parties to initiate a call. Thereafter, if the caller or the caller is disconnected, the caller detects this and releases the communication path that has been used so far, and also puts both phones in a standby state, and then the branch exchange ends the operation.

As described above, the conventional CT-2 is capable of making a call only and cannot use a general trunk line, and the local exchange is connected to a public telephone network or an ISDN trunk line through a wired line. It is not efficient when there is a large amount of money because it is not available, and there are differences in call charges when using CT-2 trunk lines or general trunk lines in certain areas.

The present invention has been made in view of the above-described problems, and it is possible to connect a branch exchange terminal and a call-only terminal, so that a terminal connected to the call-only terminal and the branch exchange can make an economical call between a general trunk line and a CT-2 trunk line. The purpose of the present invention is to provide a system and method for selecting and using CT-2 trunk lines and general trunk lines in a premises exchange where a number of trunk lines can be selected.

The present invention to achieve the above object, the central control unit for controlling the overall operation of the premises exchange; A switching unit for opening or releasing a communication path between a general trunk line or an ISDN trunk line and a plurality of extension terminals under control of the central controller; An ISDN trunk line matching unit matching the switching unit with the ISDN trunk line to provide a comprehensive information communication service; A general trunk line matching unit for making a telephone call by matching the switching unit with an external public telephone network; An extension matching unit for matching the switching unit with a plurality of extension terminals; An internal branch exchanger having a DTMF recognition unit for detecting a DTMF signal applied from an extension terminal and applying the same to the central control unit, the ring exchange unit being connected to the extension matching unit and receiving and outputting a ring signal from the station; A second extension RF unit for transmitting / receiving data wirelessly with another wireless terminal; An extension terminal connected to the other wireless terminal and the local exchange when it is wired with the other wireless terminal and transmits / receives data or transmits / receives data with the second extension RF unit and receives a ring signal from the ring receiver. It characterized in that it comprises a fixing device including a second connection switch to enable a call between.

On the other hand, CT-2 trunk line and general trunk line selection and use device in the local exchange, CT-2 RF line for transmitting and receiving data with the CT-2 trunk line; A first extension RF unit for transmitting / receiving data wirelessly with another communication device; And a transmission-only terminal including a first connection switch unit configured to match the CT-2 RF unit and the first internal RF unit, match with another communication device by wire, and transmit / receive data.

On the other hand, CT-2 trunk line and general trunk line selection method in the local exchange, the method comprising: a first step of checking whether the call-only terminal requires the use of the general trunk line; A second process of connecting the call-only terminal and the fixing device through the internal RF unit when the first process requires the use of a general trunk line; After the second process, after occupying the general trunk line through the general trunk line matching unit of the premises exchange, characterized in that it comprises a third process of attempting a call.

On the other hand, CT-2 trunk line and general trunk line selection method in the premises exchange, the method comprising: a first step of checking whether the general terminal connected to the premises exchange requires the call of the call-only terminal; A second step of receiving a call number of the call-only terminal when calling the call-only terminal in the first step; A third process of attempting a call with the call-only terminal through the fixing device after the second process; A fourth step of checking whether to request the use of the CT-2 trunk line if the call of the call-only terminal is not requested in the first step; When the use of the CT-2 trunk line is requested in the fourth process, after occupying the CT-2 trunk line through the CT-2 RF unit of the call-only terminal, a fifth process of attempting a call is included.

1 is a block diagram of a general private branch eXchange (Private Branch eXchange).

2 is a CT-2 trunk line and general trunk line selection device in the premises exchange according to the present invention

Block diagram of the connection to the exchange.

3 is to occupy the general trunk line using the call-only terminal shown in FIG.

Flow chart in case.

Figure 4 is a terminal connected to the local exchange is talking to the call-only terminal shown in Figure 2

Or CT-2 trunk line.

Explanation of symbols on the main parts of the drawings

10: ISDN trunk line matching unit 20: general trunk line matching unit

30: internal matching part 40: switching part

50: DTMF recognition unit 60: central control unit

100: premise exchanger 200: outgoing terminal

210: first connection switch unit 220: first extension RF unit

230: CT-2 RF unit 300: fixing device

310: second connection switch unit 320: second extension RF unit

330: ring receiver

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

In the premises exchange according to the present invention, the CT-2 trunk line and the general trunk line selective use device are provided with a transmission-only terminal 200 and a fixing device 300, as shown in FIG.

The transmission-only terminal 200 includes a first connection switch unit 210, a first extension RF unit 220, and a CT-2 RF unit 230, and the first connection switch unit 210 is CT-2. The RF unit 230 and the first internal RF unit 220 are matched, and the fixing unit 300 is wired to switch data. The first internal RF unit 220 transmits / receives data wirelessly with the fixing device 300, and the CT-2 RF unit 230 transmits / receives data with the CT-2 trunk line.

Meanwhile, the fixing device 300 includes a second connection switch unit 310, a second internal RF unit 320, and a ring receiving unit 330. The second connection switch unit 310 is wired with the first connection switch unit 210 to transmit / receive data or to transmit / receive data with the second extension RF unit 320, and the premises exchange 100 When the ring signal is received from the ring receiver 330 in connection with the general trunk line matching unit 20 and the extension line matching unit 30, the call is enabled between the call-only terminal 200 and the terminal connected to the premises exchange 100. . The second extension RF unit 320 wirelessly transmits / receives data with the first extension RF unit 220, and the ring receiver 330 is connected to the extension matching unit 30 of the premises exchange 100 to the extension. It receives and outputs ring signal from.

The operation of the present invention configured as described above will be described in detail with reference to the operation flowcharts of FIGS. 3 and 4 as follows.

The present invention is the first, the operation using the call-only terminal 200 to occupy the general trunk line of the premises exchange 100 and the second, the call occupying the CT-2 trunk line using the terminal connected to the premises exchange 100 Can be divided into

First, an operation of making a call by occupying the general trunk line of the premises exchange 100 using the call-only terminal 200 will be described with reference to the operation flowchart shown in FIG. 3.

If the user wants to make a call using the general trunk line through the transmission-only terminal 200, the user inputs a trunk line selection function key provided on the keypad of the transmission-only terminal 200 (step S1). Accordingly, the first internal RF unit 220 of the transmission-only terminal 200 and the second internal RF unit 320 of the fixing device 300 are wirelessly connected (step S2), and the general trunk line selection signal is fixed to the fixed device ( It is applied to the central control unit 60 via the internal matching unit 30 of the premises exchange 100 through the second connection switch unit 310 of 300, the central control unit 60 is currently available for general station selection An arbitrary trunk line is selected and occupied among the trunk lines of the matching section 20 (step S3), so that a call can be made (step S4). On the other hand, if the user does not choose to use the general trunk line in step S1, the call is occupied by occupying the CT-2 trunk line as in the prior art (step S5).

Meanwhile, an operation of making a call by occupying the CT-2 trunk line using a terminal connected to the premises exchange 100 will be described with reference to the operation flowchart shown in FIG. 4.

If the user of the terminal connected to the premises exchange 100 in the state that the call-only terminal 200 is in use to enter the CT-2 call function key to call the user of the call-only terminal 200, the central control unit 60 It checks whether the call for the call-only terminal 200 is requested (step S10), and the call-only number for the call-only terminal 200 is received because the call for the call-only terminal 200 is requested. When the user inputs the call number of the call-only terminal 200 (step S20), the central control unit 60 sends a ring signal to the ring receiving unit 330 side of the fixing device 300 through the internal matching unit 30. When the ring signal is applied from the premises exchange 100, the ring receiver 330 receives the first extension of the second extension RF unit 320 and the call-only terminal 200 through the second connection switch unit 310. By transmitting / receiving data wirelessly between the RF units 220 (step S30), a call is possible between the terminal user of the branch exchange 100 and the user of the originating terminal 200 (step S40). In addition, in step S10, the user of the terminal connected to the premises exchange 100 in the state in which the call-only terminal 200 is connected to the fixing device 300 inputs a CT-2 trunk line use function key to use the CT-2 trunk line. When the central control unit 60 checks whether the user wants to use the CT-2 trunk line (step S50), the user wants to use the CT-2 trunk line, and thus, the fixed device 300 through the general trunk line matching unit 20. Connect the second connection switch 310 of the). The second connection switch unit 310 is connected to the first connection switch unit 210 by wire, since the transmission-only terminal 200 is connected to the fixing device 300. Therefore, by occupying the CT-2 trunk line through the CT-2 RF unit 230 of the call-only terminal 200 (step S60), the terminal user of the premises exchange 100 makes a call using the corresponding CT-2 trunk line. It becomes possible (step S70, S40).

As described above, the present invention is to enable the connection between the internal exchange and the call-only terminal, select the trunk line that can be economical call between the general-purpose line and the CT-2 trunk line between the call-only terminal and the terminal switch By making phone calls over trunk lines, it provides an efficient and economical means of communication.

Claims (4)

A central controller for controlling the overall operation of the branch exchange; A switching unit for opening or releasing a communication path between a general trunk line or an ISDN trunk line and a plurality of extension terminals under control of the central controller; An ISDN trunk line matching unit matching the switching unit with the ISDN trunk line to provide a comprehensive information communication service; A general trunk line matching unit for making a telephone call by matching the switching unit with an external public telephone network; An extension matching unit for matching the switching unit with a plurality of extension terminals; An internal branch exchanger having a DTMF recognition unit for detecting a DTMF signal applied from an extension terminal and applying the same to the central control unit, the ring exchange unit being connected to the extension matching unit and receiving and outputting a ring signal from the station; A second extension RF unit for transmitting / receiving data wirelessly with another wireless terminal; An extension terminal connected to the other wireless terminal and the local exchange when it is wired with the other wireless terminal and transmits / receives data or transmits / receives data with the second extension RF unit and receives a ring signal from the ring receiver. CT-2 trunk line and general trunk line selection using device in the premises exchange, characterized in that it comprises a fixing device including a second connection switch to enable communication between. An apparatus for selecting and using CT-2 trunk lines and general trunk lines in a local exchange, comprising: a CT-2 RF unit for transmitting / receiving data with a CT-2 trunk line; A first extension RF unit for transmitting / receiving data wirelessly with another communication device; And an outgoing dedicated terminal including a first connection switch unit configured to match the CT-2 RF unit and the first internal RF unit, and wired with the other communication device to transmit / receive data. CT-2 trunk line and general trunk line optional device. CLAIMS 1. A method for selecting and using CT-2 trunk lines and general trunk lines in a local exchange, comprising: a first step of checking whether a call-only terminal requires the use of a general trunk line; A second process of connecting the call-only terminal and the fixing device through the internal RF unit when the first process requires the use of a general trunk line; And after the second process, occupying the general trunk line through the general trunk line matching unit of the premises exchange, and then performing a call. CLAIMS 1. A method for selecting and using CT-2 trunk lines and general trunk lines in a local exchange, comprising: a first step of checking whether a general terminal connected to the local branch exchange calls for a call-only terminal; A second step of receiving a call number of the call-only terminal when calling the call-only terminal in the first step; A third process of attempting a call with the call-only terminal through the fixing device after the second process; A fourth step of checking whether to request the use of the CT-2 trunk line if the call of the call-only terminal is not requested in the first step; If the request for the use of the CT-2 trunk line in the fourth process, occupying the CT-2 trunk line through the CT-2 RF unit of the call-only terminal, the branch exchange, characterized in that it comprises a fifth process of attempting a call How to use CT-2 trunk line and normal trunk line