KR20040072864A - Communication service apparatus and Signaling Procedure for Caller and Called Number Delivery in Keyphone - Google Patents

Abstract

PURPOSE: A communication service apparatus for providing a calling number and a called number in a keyphone and a method therefor are provided to transmit a called telephone number before call transfer to a voice messaging system. CONSTITUTION: A local exchange(10) is installed at a communication provider side. A keyphone(13) is installed at a business client side, and exchanges a call into an internal number. A TNDS-C(Telephony Number Delivery System-Carrier)(11) receives and stores a telephone number of an external caller of the keyphone(13), stores an extension number pressed by the caller after being firstly contacted with the keyphone(13), transmits the calling number or called number, and is matched with the local exchange(10). A TNDS-S(Telephony Number Delivery System-Subscriber)(14) requests the calling number to the TNDS-C(11) if an incoming response off-hook signal is generated in a state of receiving a telephone incoming ring. The TNDS-S(14) receives and stores a called number if an internal subscriber calls. The TNDS-S(14) transmits the calling number or called number in a DTMF(Dual Tone Multifrequency) signal to an external telephone number transmission requesting device, registers and stores the granted extension number, and is matched with a subscriber terminal. A VMS(Voice Messaging System)(15) requests a called extension number from an incoming call to a busy signal or no reply call of the subscriber terminal, and stores the called extension number for processing messaging to a mobile phone of the corresponding subscriber.

Description

Communication service apparatus and method for providing outgoing number and called number in simplified exchange {Communication service apparatus and signaling procedure for Caller and Called Number Delivery in Keyphone}

The present invention provides the function of displaying the caller's caller number of the external and internal caller on the caller ID display device of the corporate premises using a KeyPhone and external and internal caller dials to the messaging device connected to the keyphone during a call or no answer. The present invention relates to a communication service provider side and subscriber side telephone number transceiving processing apparatuses and a communication service apparatus and method for transferring telephone number information between respective apparatuses for providing a function of delivering a telephone number of an internal subscriber.

The caller ID service provided by landline and mobile telephone operators currently displays the calling party number on the called party's device before answering the wired and mobile phone terminal directly interworking with the carrier's device. It also considers the ability to display the calling number for a new incoming call.

In addition, a hardware device for displaying a calling number is added to a private automatic branch exchange (PABX), so that it is possible to provide a calling number display service to a subscriber in a premises line that is not directly matched with a carrier.

However, in the case of a simple exchange (KP: KeyPhone), the two-stage exchange concept (automatic exchange after an initial connection to an operator or an unmanned automatic exchange device), with the characteristics of the product for sale to relatively small business customers, Due to the nature of the device of the exchange method connected to the actual called party by designating the number), it is difficult to provide the calling number display service at present due to the difficulty of providing the calling number to the internal line.

In the case of the simple exchange currently in operation at home and abroad, the function of delivering the calling number to the internal subscriber is not implemented. Therefore, the telephone number of the external and internal caller of the simple exchange cannot be provided to the internal called party. Has not been provided.

In addition, when a customer inside a simple switchboard handles a call to a messaging (VMS) device in a busy or unresponsive manner, the messaging device has no way of knowing the telephone number of the internal subscriber before the transfer, so it can be applied to all mobile switches. Some messaging devices are not commercially available.

The technical problem of the present invention is to solve the above problems, and provides the internal subscriber with the telephone number of the external and internal caller of the simple exchange, and also transmits a message to the mobile subscriber of the internal subscriber when the call transfer to the messaging device during a call or no answer It is to provide a communication service device and a method for delivering the incoming call number to the messaging device before the transfer required.

1 is a block diagram of a communication service apparatus according to an embodiment of the present invention.

Figure 2 is a block diagram of a telephone number transmission and reception processing unit matched to the carrier switch side for the implementation of the present invention.

3 is a block diagram of an apparatus for transmitting / receiving a telephone number that is matched to a user side of a simple exchange for implementation of the present invention.

4 is a flowchart illustrating a signal transmission method for transmitting a calling number between an external calling party and an internal subscriber in a simple switch for implementing the present invention.

5 is a flowchart illustrating a signal transmission method for transmitting a calling number between an originating subscriber side and an internal terminating subscriber side in a simple exchange for an implementation of the present invention;

6 is a flowchart illustrating a signal transmission method for transferring a simple exchange internal called party number dialed by a simple exchange external and internal subscriber to a VMS device for implementation of the present invention.

* Explanation of symbols for the main parts of the drawings

10: Local Exchange (LE) Local Service Provider

11: TNDS-C (Telephony Number Delivery System-Carrier) A device that matches the service provider side for transmitting and receiving telephone number

12: MDF (Main Distribution Frame) Distributor for distributing domestic cable and external trunk line in telecommunications operator

13: Simple exchanger of KP (KeyPhone) corporate customer

14: Telephone number transmission / reception processing device matched to subscriber side of TNDS-S (Telephony Number Delivery System-Subscriber) telephone number exchange processing

15: VMS (Voice Messaging System) Messaging device that delivers the contact message to the customer's mobile phone when the internal subscriber is busy or no answer

16: Automatic guide exchange device for ARS (Automatic Response System) simple exchange

Communication service device according to one feature of the present invention for achieving the technical problem,

A local exchange installed at the carrier side;

A simple exchanger installed at the corporate customer side and serving as an exchange with the corresponding internal number;

Receive and store the telephone number of the external caller of the simple exchange, store the extension number dialed by the caller after the primary connection with the simple exchange, and forward the calling or destination number to the calling party's caller's number request on the called party's side. A first telephone number transmission and reception processing unit matched to the local exchange;

When the incoming call answering Off-Hook signal is generated in the incoming call ring state, the calling number is requested to the first telephone number transmitting / receiving processing device, and the internal subscriber receives and stores the calling number when calling. A second telephone number transmission / reception processing apparatus for transmitting a calling number or a called number as a DTMF signal, registering and storing an assigned extension number, and matching the subscriber terminal;

It includes a messaging device for requesting an incoming call extension number automatically answering incoming calls for incoming or unanswered calls of the subscriber station and processing the messaging to the mobile phone of the subscriber.

Then, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is a block diagram of a communication service device according to an embodiment of the present invention.

Referring to Fig. 1, a communication service apparatus according to an embodiment of the present invention has a function of receiving and storing a telephone number of an external caller (KP) external caller, and storing an extension number pressed by the caller after the primary connection with the simplified exchanger. DTMF signal receiving function for receiving, calling telephone number transmission / reception processing matched to the service provider side performing DTMF signal transmission function for transmitting the calling number and the called number for the caller request number from the called party's calling party number display device or the messaging device, respectively Device 11, off-hook signal detection in incoming call ring state, incoming call answering off-hook call function to request caller ID immediately, function to receive and store caller ID when calling by internal subscriber, send phone number Subscriber terminal that performs the function of transmitting calling number or called number as DTMF signal to requesting device, and registering and storing the assigned extension number. Telephone number transmission and reception processing unit 14 matched to the base, and a messaging device that requests and automatically receives an incoming extension number immediately upon incoming call for a busy or unanswered call and processes the message to the subscriber's mobile phone (15). And a telecommunication operator side local exchange 10 and a corporate customer side simple exchange 13 that match these devices.

The telephone number transmission / reception processing unit (TNDS-C) installed at the communication service provider side is connected to the MDF device 12, and the subscriber station 16 is separated or integrated with the subscriber-side telephone number transmission / reception processing unit (TNDS-S). It can be configured as. The guidance and exchange function is required to handle calls from external callers who do not know the extension number. However, the existing operator can not store the extension number in the TNDS-C (11). Although the use of the guide exchange apparatus 17 is required, the present invention has been implemented in consideration of the case where the automatic guide exchange is performed in a state in which the caller knows the extension number. will be.

TNDS-C, the telecommunication service provider's telephone number transmission / reception processing device, receives and stores the extension number pressed by the caller as a DTMF signal, and transmits the telephone number requested by the called party as a DTMF signal. It can be implemented in a form that adds, and eliminates the subscriber interface-related functions such as the keypad, display, the internal circuit configuration is shown in FIG.

Referring to Fig. 2, a function block 20 for matching and terminating ring signal detection between a local exchange and a trunk line, and a function block 21 for receiving and processing a modulated message for transmitting a calling number at a local operator of a telecommunication service provider. A DTMF signal transmission / reception processing function block 22 for transmitting an outgoing number or a called number to a called party and a function of receiving an extension number pressed by a calling subscriber and a telephone number transmission request from a called party device, and various functional blocks in the device; Control block 23 for controlling the data, a memory block 24 for storing programs and data for the operation of the control block, and an RS-232 matching block for matching with an external device (laptop PC, etc.) for operation management of the device. It consists of 25.

The subscriber's telephone number transmission / reception processing unit (TNDS-S) detects the incoming off-hook and transmits a tone indicating a caller's number request, transmits the caller's number as a DTMF signal in response to the caller's request in the caller's state, and a DTMF signal. Receives a calling number and displays it on the display, registers and stores the calling number, and functions such as a user interface through a keypad and a display. An example is shown.

Referring to Fig. 3, the subscriber's telephone number transmission / reception processing device (TNDS-S) is a RJ-11 jack (30, 31) for connection with the extension telephone line and the subscriber terminal, and the matching and incoming ring with the extension telephone line. A signal detection function block 32, a DTMF signal transmission / reception processing function for receiving an extension number pressed by the calling subscriber and a tone indicating a number transmission request from the called party device as a DTMF signal, and transmitting the calling number or called number as a DTMF signal to the called party. Block 34, a control block 35 for controlling various functional blocks of the apparatus, a memory block 38 for storing programs and data for operation of the control block, an extension number registered to the terminal itself, and an incoming call Keypad function block 37 and display function block 36 for user input and output for the inquiry and management of calling and dialed called numbers RS-232 matching block 39 for interworking with an external device.

In addition, a function block 33 for receiving and processing a modulated message signal for use as a calling number display device at the time of registration with a local exchange or an automatic exchange private exchange may also be included.

The operation of the communication service device having such a configuration is as follows.

First, the operation flows for the case of the external call and the case of the internal call during the signal processing procedure in which the calling number is displayed on the subscriber side telephone number transceiving processing device are shown in FIGS. 4 and 5.

Referring to FIG. 4, when an external caller dials the representative number of the simple exchange (S400), the local exchange LE of the service provider translates the called number and transmits the incoming ring signal to the simplified exchange KP.

Then, the telephone number transceiving processing device TNDS-C and the simple switch KP, which are matched to the communication service provider side, receive the incoming ring signal (S401, S402).

At this time, the ring detection function block 20 of the telephone number transmission / reception processing unit (TNDS-C) 11 detects the first ring signal and transmits it to the control function block 23 to start the process for the telephone number transmission / reception process and to activate the CID. The processing function block 21 receives the call number message transmitted from the exchange (S403).

The switch-side telephone number transmission / reception processing apparatus 11 may be implemented in a form in which one control function block controls telephone number transmission / reception processing on multiple subscriber lines.

In addition, since the telephone number processing unit 11 of the exchange side does not need to store a large amount of telephone numbers for a long time, the memory block 24 is incorporated in the control function block 23 in a form of holding a small amount of memory inside the processor. It is also possible to implement.

After receiving the incoming ring signal (S404), the simple switch 13 connects the calling subscriber to the automatic guide exchange device (17) (S405). Then, when the caller dials the extension number with the DTMF button (S407) according to the voice guidance (S406) of the automatic guide exchange device (S17), the DTN transmission / reception function block 22 and the KP 13 of the TNDS-C 11 are transmitted. The connected automatic guide exchange apparatus 17 receives them, respectively (S408 and S409). At this time, the TNDS-C 11 enters a state waiting to receive the subscriber number request tone transmitted from the called party (S410).

In addition, the automatic guide exchange apparatus 17 requests a call transfer by sending an extension number to the KP after hook-flash to the KP 13 for connection processing to a subscriber corresponding to the extension number received after the voice guidance. .

The KP 13 translates the extension number received from the automatic guide exchange apparatus 17, transmits an incoming ring signal to the internal called party, and is transmitted to the subscriber telephone number transceiving processing device 14 and the called telephone terminal 16 ( S411, S412).

The TNDS-S 14 enters the incoming call waiting with ring signal reception (S413), and when the incoming call response (Off-Hook) signal is received from the called party (S414), the calling party number is sent to the TNDS-C11. The request tone (*) is transmitted (S415).

In the present invention, in order to identify the calling party number request and the called party number request, the tones corresponding to '*' and '#' were used, respectively.

Immediately after sending the calling subscriber number request tone, the TNDS-S 14 enters the calling subscriber number receiving standby (S416), and the TNDS-C 11 sends the calling number generated in the process of delivering the calling number to the TNDS-S 14. In order to prevent the subscriber from receiving the signal transmission tone and to prevent the error of transmitting the calling number by transmitting the DTMF signal generated by the calling party (S417), the call path in the TNDS-C 11 is blocked (S417), and the stored calling party number is stored as the DTMF signal. -S (14) is sent to (S418).

The TNDS-C 11 restores the call path after ending the transmission of the outgoing subscriber number (S419). After the call is made between the caller and the called party (S420).

Fig. 5 shows a calling number display processing procedure for a call between subscribers in a simple switchboard. When the calling subscriber is off-hook, the subscriber matching circuit unit of the calling subscriber's telephone number transceiving processing device (TNDS-S, 14) is shown. If it detects this at 32 and informs the control function block 35, it controls the DTMF transmit and receive function block to receive a DTMF signal.

When the calling extension dials the internal called number (S500), the DTMF transmit / receive function block 32 of the TNDS-S 14 on the calling subscriber side receives / stores the called number (S501), and the simplified exchange 13 The receiving extension number is received (S502).

The calling party's calling number is registered and used by the user in advance in the keypad function block 37 of the telephone number transmission / reception processing device (TNDS-S) 14. The KP 13 translates the called number so that the called ring is sent to the telephone number transceiving processing device (TNDS-S) 14 and the subscriber terminal 15 of the called party (S504, S505).

When the called party's telephone number transmission / reception processing unit (TNDS-S) 14 detects the incoming ring in the ring detection function block 32, it enters the waiting for receiving an incoming response (Off-Hook) (S506). (S507) The DTMF transmission / reception function block 34 transmits the calling party number request tone (S508), and waits for receiving the calling party number (S509).

Immediately after receiving the calling party number request tone, the calling party number transmitting / receiving processing apparatus (TNDS-S) 14 cuts off the internal call path of the apparatus (S510), and the calling party number transmitting and receiving processing apparatus 14 (TNDS-S) After transmitting the extension number registered in advance in the DTMF transmission / reception function block 34 as a DTMF signal (S511), the device call path is restored (S512). Thereafter, a normal call is made between the sender and the called party in the simple switch (S513).

In case of subscriber-side telephone number transmission / reception apparatus 14 (TDNS-S), a memory block 38 of sufficient size is required for storing a caller's calling number list and a caller's dialed caller list. The keypad function block 37 and the display function block 36 are required for searching and managing numbers.

In addition, it is also possible to consider application software development of the RS-232 function block 39 in consideration of software upgrade of the subscriber-side telephone number transceiving device (TNDS-S) 14 and interoperation with a PC.

6 is connected to the messaging device (VMS, 15) matched to the simple exchange (KP, 13) when the internal destination subscriber designated by the external and internal caller is busy or no answer, and delivers the message to the mobile phone of the destination subscriber. The procedure for providing the destination extension number to the messaging device (VMS) 15 is shown.

When the external and internal subscribers dial the extension number (S600), the telephone number transmission / reception processing units 11 and 14 on the subscriber side of the telecommunications operator switch side 10 or the simple switch 13 receive and store the called number (S601). In step S603, the subscriber number request tone is received. The simple exchange (KP) 13 receives the incoming extension number (S602), and if the called party status is busy or unanswered (S604), transfers the incoming ring signal to the messaging device 15 by transferring it to the messaging device 15. It transmits (S605).

If the messaging device 15 automatically responds after receiving the incoming ring (S606), the simple switch (KP) 13 detects and switches the connection so that the originating subscriber and the messaging device 15 are connected (S607).

After the incoming response, the messaging device 15 transmits the tone requesting the incoming extension number to the switch side telephone number transceiving unit (TNDS-C) or the simple subscriber internal subscriber side telephone number transceiving unit (TNDS-C) (S608). ), The incoming extension number is received (S609).

After receiving or receiving the extension number request tone, the telephone number transceiving processing devices 11 and 14 of the exchange side or the subscriber side block the calling side call path of the telephone number transceiving processing device (TNDS-C / S) (S610). After the incoming extension number is sent to the messaging device 15 (S611), the calling party restores the calling party call path (S612).

After receiving the incoming extension number, the messaging device 15 searches for the extension number corresponding mobile phone number (S613), transmits an announcement to receive the caller's contact number (S614), and receives the contact phone number from the calling subscriber. By doing so (S615), and configures a contact message and transmits it (S616).

By this process, it is possible to receive the contact telephone number of the caller of the incoming call, even during a busy or absent call.

As described above, in the embodiment of the present invention provides a calling number display function to the subscriber inside the simple switchboard, and if the internal subscriber is busy or unanswered, connected to the messaging equipment to provide a service for providing messaging to the mobile phone of the subscriber In addition, it can also be possible to provide a variety of application services using the calling number and the called number in the simplified exchange.

Claims (8)

A local exchange installed at the carrier side; A simple exchanger installed at the corporate customer side and serving as an exchange with the corresponding internal number; Receives and stores the telephone number of the external caller of the simple switchgear, stores the extension number pressed by the caller after the primary connection with the simple switch, and transmits the calling number and the called number for the caller's telephone number request of the called party, respectively. A first telephone number transmission / reception processing device that is matched to the local exchange; When the incoming call answering Off-Hook signal is generated in the incoming call ring state, the calling number is requested to the first telephone number transmitting / receiving processing device, and the internal subscriber receives and stores the calling number when calling. A second telephone number transmission / reception processing apparatus for transmitting a calling number or a called number as a DTMF signal, registering and storing a given extension number, and matching the subscriber terminal; And a messaging device that requests and automatically receives an incoming extension number for the incoming call to the busy or unanswered call of the subscriber station and processes the message to the mobile phone of the subscriber. The method of claim 1, The first telephone number transmission and reception processing apparatus, A control program is executed to receive and store the telephone number of the external caller of the simple switch, store the extension number pressed by the sender after the primary connection with the mobile switch, and make a call for each caller's telephone number request on the called party's side. A control block for controlling various functional blocks in the apparatus to convey the number and the called number; A memory block for storing a program and data for the operation of the control block; A telephone line matching and ring detection function block for detecting a matching and incoming ring signal between the local exchange and the trunk line during the simple switching period; A CID processing function block for receiving and processing a message modulated for forwarding a number by the local exchange side, A DTMF signal transmission / reception processing function block for receiving an extension number pressed by the calling subscriber and a request indicating a telephone number transmission request from the called party's device, and transmitting the calling number or the called number to the called party; Communication service device including an RS-232 matching block for matching with an external device for operation management of the device. The method of claim 1, The second telephone number transmission and reception apparatus, When the incoming call answering Off-Hook signal is generated in the incoming call ring state, the calling number is requested to the first telephone number transmitting / receiving processing device, and the internal subscriber receives and stores the calling number when calling. A control block which transmits a calling number or a called number as a DTMF signal and controls various functional blocks of the apparatus to register and store the assigned extension number; Memory block for storing the program and data for the operation of the control block, RJ-11 jack for connection to extension lines and subscriber terminals, Telephone line matching and ring detection function block, which serves as a matching line with the extension line and detects an incoming ring signal, A DTMF signal transmission / reception processing function block for receiving an extension indicating the extension number pressed by the calling subscriber and a request for number transmission from the called party's device as a DTMF signal, and transmitting the calling number or called number as a DTMF signal to the called party; Keypad function block and display function block for user input and output for registering extension number assigned to the terminal itself, inquiry and management of caller ID and dialed caller ID for incoming call, A communication service device comprising an RS-232 matching block for software upgrades for the device, interworking with external devices, and the like. Caller's phone is added to operator's switchboard to provide caller's phone number and caller's phone number which are necessary for each case of incoming / outgoing call from outside or inside of simple exchange and connected to messaging device during call or no answer. A communication service apparatus for providing a calling party number display service and a messaging service by receiving, storing, and transmitting a number and a called party number. A control program is executed to receive and store the telephone number of the external caller of the simple switch, store the extension number pressed by the sender after the primary connection with the mobile switch, and make a call for each caller's telephone number request on the called party's side. A control block for controlling various functional blocks in the apparatus to convey the number and the called number; A memory block for storing a program and data for the operation of the control block; A telephone line matching and ring detection function block for detecting a matching and incoming ring signal between the local exchange and the trunk line during the simple switching period; A CID processing function block for receiving and processing a message modulated for forwarding a number by the local exchange side, A DTMF signal transmission / reception processing function block for receiving an extension number pressed by the calling subscriber and a request indicating a telephone number transmission request from the called party's device, and transmitting the calling number or the called number to the called party; Communication service device including an RS-232 matching block for matching with an external device for operation management of the device. Caller's phone number added to user's terminal to provide caller's phone number and caller's phone number required for normal incoming call from outside or inside simple exchange and connected to messaging device during call or no answer. And a communication service device that provides a calling party number display service and a messaging service by receiving, storing, and transmitting a called party number. Incoming call answering state in the incoming call ring state, the caller requests the calling number to the first telephone number transmission / reception processing device immediately after the occurrence of an off-hook signal, and the internal subscriber receives and stores the calling number when the call is received. A control block which transmits a calling number or a called number as a DTMF signal and controls various functional blocks of the apparatus to register and store the assigned extension number; Memory block for storing the program and data for the operation of the control block, RJ-11 jack for connection to extension lines and subscriber terminals, Telephone line matching and ring detection function block, which serves as a matching line with the extension line and detects an incoming ring signal, A DTMF signal transmission / reception processing function block for receiving an extension indicating the extension number pressed by the calling subscriber and a request for number transmission from the called party's device as a DTMF signal, and transmitting the calling number or called number as a DTMF signal to the called party; Keypad function block and display function block for user input and output for registering extension number assigned to the terminal itself, inquiry and management of caller ID and dialed caller ID for incoming call, A communication service device comprising an RS-232 matching block for software upgrades for the device, interworking with external devices, and the like. The telephone number of the exchange and the user's terminal, respectively, to provide the calling party's and the called party's telephone numbers, which are required for normal incoming calls on the extension telephone from inside or outside the simple exchange, and when connected to the messaging device during a call or no answer. A communication service method for providing a calling party number display service and a messaging service by adding a transmission / reception processing device to receive, store, and transmit a calling party number and a called party number. When the external caller dials the representative number of the simple switch, the local exchange (LE) of the telecommunications operator translates the called number and transmits the incoming ring signal to the simple switch (KP); The telephone number transmission / reception processing unit (TNDS-C) and the simple switchboard (KP), which are matched to the service provider side, receive an incoming ring signal, and the ring detection function block 20 of the telephone number transmission / reception processing unit (TNDS-C, 11) is provided. Detecting the initial ring signal and passing it to the control function block 23, the process for telephone number transceiving processing is started, and the CID processing function block 21 receiving a calling number message sent from the exchange; When the simple exchange receiving the incoming ring signal connects the calling subscriber to the automatic guide exchange device 17, and the caller dials the extension number with the DTMF button according to the voice guidance of the automatic guide exchange device, the TNDS-C 11 receives Receiving each of the automatic guide exchange apparatus 17 connected to the DTMF transmission / reception function block 22 and the KP 13; The TNDS-C 11 enters a state of waiting for a subscriber number request tone transmitted from the called party, and the KP 17 connects the subscriber to the subscriber corresponding to the extension received after the voice announcement. Requesting a call transfer by sending an extension number to KP after Hook-Flash to 13; KP (13) translates the extension number received from the automatic guide exchange device 17 to send an incoming ring signal to the internal called party to deliver to the subscriber telephone number transmission and reception processing unit 14 and the destination telephone terminal (16) ; When the TNDS-S 14 enters the incoming call waiting with ring signal reception and receives an off-hook signal from the called party, the TNDS-C 11 sends an outgoing subscriber number request tone (*) to the TNDS-C 11. Transmitting; TNDS-S (14) enters the waiting to receive the calling party number, TNDS-C (11) prevents the calling subscriber from receiving the ringing tone generated in the process of passing the calling number to the TNDS-S (14) Blocking a call path in the TNDS-C 11 to prevent an error in transmitting the calling number by transmitting the generated DTMF signal, and transmitting the stored calling party number to the TNDS-S 14 as a DTMF signal; TNDS-C (11) after completing the transmission of the calling party number to restore the call path to make a call between the caller and the called party. The telephone number of the exchange and the user's terminal, respectively, to provide the calling party's and the called party's telephone numbers, which are required for normal incoming calls on the extension telephone from inside or outside the simple exchange, and when connected to the messaging device during a call or no answer. A communication service method for providing a calling party number display service and a messaging service by adding a transmission / reception processing device to receive, store, and transmit a calling party number and a called party number. When the calling subscriber is off-hook, when the subscriber matching circuit unit 32 of the calling subscriber TNDS-S detects this and informs the control function block 35 of the calling subscriber, the DTMF transmission / reception function block receives the DTMF signal; When the calling extension dials the internal called number, the DTMF transmit / receive function block 32 of the TNDS-S 14 on the calling subscriber side receives / stores the called number, and the simple switch 13 receives the called extension. step; The KP 13 translates the called number and sends the called ring to the TNDS-S 14 and the subscriber station 15 on the called side, and the called side TNDS-S 14 sends the called ring to the ring detection function block 32. Detecting the incoming call and entering the waiting state for receiving an off-hook; When the called party responds, transmitting the calling party number request tone in the DTMF transmission / reception function block 34 and waiting to receive the calling party number; As soon as the calling party's TNDS-S 14 receives the calling party number request tone, it intercepts the device's internal call path and sends a preregistered extension within the calling party's TNDS-S as a DTMF signal from the DTMF transmit / receive function block 34. And then restoring an intra-device call path so that a normal call is made between the sender internal caller and the called party. The telephone number of the exchange and the user's terminal, respectively, to provide the calling party's and the called party's telephone numbers, which are required for normal incoming calls on the extension telephone from inside or outside the simple exchange, and when connected to the messaging device during a call or no answer. A communication service method comprising providing a caller's phone number display service and a messaging service by adding a transmission / reception processing device to receive, store, and transmit a caller's phone number and a caller's phone number. When the external and internal subscribers dial the extension number, the telephone number transmission / reception processing units 11 and 14 on the subscriber side of the service provider switch side 10 or the simple switch 13 receive and store the called number and receive the subscriber number request tone. Entering the atmosphere; KP 13 receives the incoming extension number (S602), if the incoming subscriber state is busy or unanswered, transfers to the messaging device 15 and sends an incoming ring signal to the messaging device; If the messaging device 15 automatically answers the incoming ring after receiving the incoming ring, the KP 13 detects this and switches to connect the calling subscriber and the VMS device; After the VMS device 15 responds to the incoming call, the VMS device 15 transmits the tone requesting the incoming extension number to the switch side telephone number transceiving unit (TNDS-C) or the simple subscriber internal subscriber side telephone number transceiving unit (TNDS-C). Entering an extension waiting for reception; The telephone number transceiving processing devices 11 and 14 of the exchange side and the subscriber side block the calling side call path of the TNDS-C / S device after receiving the incoming extension number request tone and transmit the incoming extension number to the VMS device 15. Restoring the call path of the calling party after transmitting to the calling party; After the messaging device 15 receives the incoming extension number, the messaging device 15 searches for the mobile number corresponding to the extension number, sends out an announcement for receiving the contact number of the caller, receives the contact number from the calling subscriber, and then sends a contact message. And configuring and transmitting the same to the mobile number.