JP2003125118A - Communication method and telephone terminal using borrowed telephone number - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication method and a telephone terminal enabling selection of a charging destination depending on applications. SOLUTION: To a user terminal having a unique telephone number, a telephone number of another terminal is rented and the user selects the unique telephone number or the rented telephone number and makes a call. When an enterprise lends its contracted telephone number to a terminal possessed by an employee, the enterprise attain different account between private communication charges and job communication charges of the employee employing the same telephone terminal through the charging of the call selecting the borrowed telephone number onto the borrowed telephone number by a telephone network.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication method and a telephone terminal device, and more particularly to a communication method in which a telephone number unique to a telephone terminal and a borrowed telephone number are assigned so that a telephone call can be made using the borrowed telephone number as a billing destination. And a telephone terminal device.

[0002]

2. Description of the Related Art In a conventional telephone system, a telephone number is unique to each terminal, and as a general rule, a communication fee is charged to a unique telephone number of a source user terminal. There is. As one of the methods to avoid the burden on the originating user, there is a collect call service that charges the called party. This is a service mainly applied to international calls and is applied to general communication between domestic users. It has not been.

[0003]

With the spread of mobile telephone networks, mobile terminals have come to be used not only for personal use but also for business calls in companies. In the case of the fixed type telephone in the office, by sharing the limited communication line with multiple terminals, it is possible to effectively use the communication facilities and communication expenses in the company, but the line sharing service is not provided for mobile terminals. .

When employees are provided with business-use (public) mobile terminals on the assumption that they are not used for private communication, each user simultaneously owns a personal-owned mobile terminal and a business-use mobile terminal. It is necessary to carry it, which impairs portability. Also, if two terminals receive incoming calls at the same time, the operation may be confusing due to differences in specifications between the devices, or
Since there is no choice but to respond to one terminal, inconvenience occurs such as annoying the other party.

In particular, when a user who is unfamiliar with a business-use mobile phone carries a business-use mobile terminal when he / she temporarily goes out for a business trip or the like, due to a difference in operability from a personal-owned mobile phone, Use of a mobile terminal for business becomes troublesome. In addition, it is necessary for companies to maintain a large number of mobile phones regardless of the frequency of use, which causes problems in terms of communication costs and investment efficiency of equipment.

Japanese Unexamined Patent Publication No. 10-13505 proposes a mobile phone in which one terminal accommodates a plurality of lines and one of the standby numbers can be selected. However, a contract for a plurality of lines for each terminal is proposed. Therefore, it is not enough for the purpose of separately charging communication for private and business.

An object of the present invention is to provide a communication method and a telephone terminal device which can select a charging destination according to the purpose. Another object of the present invention is to provide a communication method and a telephone terminal device capable of registering a plurality of telephone numbers in the same terminal and sharing a specific telephone number with other user terminals. Still another object of the present invention is to provide a communication method and a telephone terminal device that can selectively use a telephone number unique to a terminal and a telephone number that has been temporarily lent. Yet another object of the present invention is to provide a telephone terminal device capable of registering a telephone number shared with other user terminals in addition to a telephone number unique to the terminal.

[0008]

In order to achieve the above object, the present invention lends a telephone number of another user terminal to a user terminal having a unique telephone number so that the user can use the unique telephone number. The feature is that any one of the borrowed telephone numbers can be selected and transmitted. According to the present invention, by charging the call charge to the borrowed telephone number on the telephone network side with respect to the outgoing call for which the borrowed telephone number is selected, for example,
When a company contracts a telephone number to a terminal owned by an employee, the same telephone terminal can be used to separate the communication charges for private use and the communication charge for business. In addition, by lending the same telephone number contracted by the company to multiple employee terminals, it is possible to consolidate the business communication charges that occur on a large number of terminals into a small number of contracted telephone numbers for charging. Become.

More specifically, in the communication method of the present invention, a borrowed telephone number from another user terminal is registered in a management center connected to a telephone network in a form associated with a telephone number unique to each user terminal. The user who uses the borrowed telephone number specifies the borrowed telephone number as the billing destination and then notifies the management center of the callee's telephone number, and the management center sets the billing destination to the designated telephone number. After that, the calling terminal and the called terminal are connected.

In one embodiment of the present invention, in the management center, the telephone number unique to each user terminal is registered, and the incoming call priority information to the unique telephone number and the borrowed telephone number is registered, and the user is registered. The management center connects the source user terminal to any of the user terminals specified by the incoming call priority information when receiving a connection request from the terminal with the borrowed telephone number as the destination.

According to another embodiment of the present invention, when the management center receives a connection request from a user terminal with a borrowed telephone number as a destination, the management center identifies the source user terminal by the user who is specified by the destination priority information. It is characterized by selectively connecting to a terminal or a specific user terminal designated by a sender.

The telephone terminal device according to the present invention has a memory for storing a telephone number specific to a terminal designated in advance and a borrowed telephone number lent from another user terminal, and a telephone number stored in the memory. Means for designating a telephone number to be charged from the inside and making a call to a destination telephone number.

Another feature of the telephone terminal device according to the present invention is that
Means for communicating with a control system connected to the telephone network to perform control procedures for lending and borrowing telephone numbers;
A memory for storing a phone number unique to the terminal and a borrowed phone number from another user terminal, and a telephone number to be charged are specified from the telephone numbers stored in the memory, and the called telephone number is issued. And means for calling.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a typical example of lending a telephone number. User H has a telephone number "090-9971-554".
When renting (registering) the above telephone number to another user A (borrower) who is the owner of 4 ", the priority order at the time of receiving the above telephone number is set. Basically, The incoming call right is given to the user having the first priority.
Assuming the above conditions, the telephone number "090-9971-5544" is borrowed to communicate with an arbitrary party K. However, as will be described later, another method may be used as a method of determining the priority of incoming call.

In FIG. 2, the owner H has a telephone number "090-9971".
-5544 "shows the incoming call priority when renting to four users A, B, C and D. When the same telephone number is lent to four users A to D, the borrowers A to D , Incoming priority levels 1 to 4, respectively. One of the borrowers A to D can make a call using the borrowed telephone number “090-9971-5544”, and any of the borrowers can use it. When a call is in progress, other users cannot make a call using the borrowed telephone number.The four users A to D have equal rights to use the borrowed telephone number (calling right), and the borrowed telephone number. If you make a call when there is a vacancy, the usage right is obtained each time, and the usage right is released when the call ends.
Basically, the user having the first priority, that is, the user A in the illustrated example, is given, and the other borrowers B, C, and D can use the borrowed telephone number only for making a call.

The owner H of the telephone number has the first priority of the incoming call in the state where the telephone number is not lent to anyone, and the priority is lowered by one each time the telephone number is lent. As shown in the figure, with four borrowers,
The priority of incoming call of the owner H is 5th (lowest). The incoming call priority of the owner H rises as the number of borrowers decreases, and when there are no borrowers, the incoming call right is given to the owner H.
Come back to. However, regarding the priority of incoming call, by adding a special support (service) function to the network (data management center) side, for example, caller K
However, the priority is 1 such as the method of making a call by designating the incoming call priority or the method of calling the other party sequentially according to the priority.
It is also possible to make an incoming call to a person other than the borrower of the highest rank.

In order to manage the borrowed number by associating it with the priority order, in the present invention, the telephone number and the control system (hereinafter referred to as the data management center) connected to the telephone network,
A data management table that stores the correspondence between the MAC address of each user terminal (telephone) and the priority order is prepared. FIG. 3 shows an example of the data management table 5 provided in the data management center.

In the data management table 5, a plurality of records with record numbers 51 are registered. Each record includes a MAC address 52 of the user terminal, a unique telephone number 53A assigned to the user terminal, and a priority 5 assigned to the telephone number 53A by the user.
3B and a borrowed number entry area for a borrowed telephone number or another telephone number assigned to the user terminal.

In the example shown here, two loan numbers can be registered for each user, and the record number 5
For records in which 1 is “01”, “02”, “04”, and “07”, the column 54
A is the first borrowed telephone number and the MAC address of its owner (borrowing source user terminal), column 54B shows the incoming call priority of the user regarding the first borrowed telephone number, column 55
A indicates the second borrowed telephone number and the MAC address of its owner, and column 55B indicates the incoming call priority order of the user regarding the second borrowed telephone number.

In the record having the record number 51 of "21", the column 54A indicates the second field assigned to the user terminal.
Telephone number, column 54B indicates the incoming call priority of the user regarding the second telephone number, column 55A indicates the third telephone number assigned to the user terminal, and column 55B indicates the third telephone number. The priority of the incoming call of the user is shown. The telephone numbers registered in the columns 54A and 55A can be determined whether they are borrowed telephone numbers or owned telephone numbers depending on the presence or absence of the borrowing source MAC address. Add 3 similar lending number entries to each user at the same time
It is possible to lend more than one phone number.

In the illustrated example, the record number 51 is "0.
The user terminals “1”, “02”, and “07” have the record number “21”.
Means that the telephone number “090-4765-5569” owned by the user is borrowed in the order of the incoming call priority of 1st, 2nd, and 3rd, respectively, and the user terminal whose record number 51 is “04” Means that the second telephone number “090-4765-5566” owned by the user with the record number “21” is borrowed with the first priority of the incoming call. As a result of lending the owned telephone number, the user with the record number "21" has the fourth priority for the telephone number "090-4765-5569" and the second telephone number "090-4765-5566". The incoming call priority is second, and the third is not rented yet.
With regard to the telephone number "090-4765-5568", the priority of incoming call is first.

FIGS. 4A and 4B show an example of the lending destination management table 20 and the resource management table 30 provided in each user terminal. Rental management table 2
0 is at least one entry 20-1, 20-2 corresponding to the unique telephone number assigned to the user terminal,
, And each entry includes an entry number 21, a unique telephone number 22, and lenders 23, 24, 25 ,.
In the lending destinations 23, 24, 25, telephone numbers unique to the lending destination user terminal are set according to the priority order.

The lending destination management table 20 shown here is
The record number “2 in the data management table 5 of FIG.
1 "for the user terminal, entry 20-1,
20-2 and 20-3 are telephone numbers 53A: "090-4765-5569" and 54A: "090-4" of the user terminal.
765-5566 "and 55A:" 090-4765-5568 "are in the lending state.

The resource management table 30 is composed of at least one entry having an entry number 31, and each entry includes the MAC address 32 of the user terminal and the MA.
Phone number held by C address (33A, 34A
A, 35A, 36A, ...) for each incoming call priority (33B,
34B, 35B, 36B, ...). The entry with the entry number “1” is for managing the incoming call priority of the unique telephone number owned by the user terminal,
The entries whose entry numbers are “2” and later are for managing borrowed telephone numbers from other users.
When the user lends a telephone number to another user, the owned telephone number resource is confirmed by the table 30. When the user uses the telephone, the table 30 confirms the telephone number that can be called.

FIG. 5 shows a schematic configuration of a communication network system to which the present invention is applied. The communication network system includes a telephone network 1 including a plurality of wireless base stations 2 and a data management center 3 connected to the telephone network 1. The data management center 3 comprises a server 4 and a file device 9. In the file device 9, in addition to the data management table 5 described above, a billing table 6 and other data tables and files are formed. When performing the procedure for lending a telephone number, the user terminal 10 is connected to the server 4 of the data management center 3 via the base station 2, and the lending data for the telephone number is registered in the data management table 5.

FIG. 6 is a block diagram showing an example of the user terminal 10. The user terminal 10 is typically a mobile phone terminal, and includes a control unit (CPU) 11, an input interface 12, a memory 13, a display unit 14, a signal processing unit 15 connected to the control unit, and the signal processing. An audio input / output processing unit 16 and a wireless transmission / reception circuit 17 connected to the unit 15. Reference numeral 18 denotes an antenna connected to the wireless transmission / reception circuit 17, and 19 denotes a removable storage medium added to the memory 13. The lender management table 20 and the resource management table 30 shown in FIG. 4 are formed in the memory 13. The storage medium 19 is for rewriting the telephone number, borrowing,
It is used to simplify the loan procedure.

Each user uses the input interface 12 described above.
Using the display unit 14, operations necessary for the telephone function, such as dialing of a destination telephone number, selection of a charging destination telephone number, selection of an incoming telephone number, and transfer selection, are performed. Display 1
4 is the operation menu, incoming telephone number, outgoing telephone number,
The billing telephone number etc. are displayed. When designating a billing telephone number, it is desirable to switch the color tone and pattern of the backlight according to the number selection state. For example, if the telephone number of the owner is called in orange, and if the borrowed number is called in green, the display color that is switched according to the selection state of the line may be displayed in the color specified by the user in advance. Good.

FIG. 7 shows an example of the operation surface of the user terminal 10. For example, when selecting a billing destination telephone number, the selection menu options displayed on the display unit 14 are associated with the dial buttons provided on the interface unit 12, and the user presses the dial button corresponding to the option. At this time, the backlight color of the selected button is changed and the display of the options (in this example, the option number and the phone number) in the selection menu is switched to another color, so that the user can select which phone number to call. Make it easy to visually determine whether there is something.

In FIG. 8, the owner H of the telephone number is the user A.
Shows a lending information registration sequence, which is a procedure for lending a telephone number. The lending information registration sequence is, for example,
It is started by connecting the user terminal 10 of the owner H who is the lending source to the data management center 3 and selecting a procedure option indicating lending information registration from the initial selection menu displayed on the display unit 14. The connection to the data management center 3 is performed by inputting a number of a specific digit designated in advance.

The owner H checks the contents of the resource management table 30 displayed on the display unit 14 (step 1
110), if the telephone number to be rented to the user A and the telephone number of the rent destination user A confirmed in advance are designated (11)
2) A registration request including these input information is transmitted to the data management center 3. When the data management center 3 receives the registration request, it refers to the data management table 5,
A resource check is performed as to whether or not the user A designated as the lending destination has a borrowing qualification (210). When the telephone number of the user A is registered in the data management table 5, it is determined that the user is eligible for borrowing, and a telephone number lending notice is transmitted to the telephone number of the user A (212).

When the permission notice is received from the user A in response to the above-mentioned talk number lending notice (312), the data management center 3
Updates the content of the data record of the user A in the data management table 5 (216), and sends an update notification to the user terminal of the owner H (218). In the user terminal,
Ask the owner H to enter the PIN code for personal authentication,
When the user H is authenticated, the authentication notification including the priority order is transmitted to the data management center 5 (126). Upon receiving the authentication notification, the data management center 3 updates the priority order of the user H and the user A in the data management table 5 (222), and then sends the procedure completion notification to the terminals of the user H and the user A ( 224), the registration process ends.

FIG. 9 shows the above lending information registration sequence as an individual flowchart for each owner (H) terminal, data management center 5, borrower (lending destination A) terminal, and the processing corresponding to FIG. The steps are indicated by the same reference numerals. In the owner terminal, the resource management table 30
Is displayed and the user is requested to check the telephone number resource (step 110). If the user determines that lending is not appropriate based on the priority status of the lending telephone number,
The lending information registration process is ended. When the user judges that the lending is possible and specifies the lending telephone number and the lending destination telephone number (112), a registration request including these pieces of information is transmitted to the data management center 3 (114).

When the data management center 3 receives the registration request, it checks whether or not the lending telephone number is registered in the data management table 5 (210). If the lending telephone number is registered, the telephone number of the lending destination is checked. A telephone number lending notice is transmitted to the client (212), and a response from the lender is awaited. When the lending destination (borrower) terminal receives the above-mentioned talk number lending notice (31
0), a message is displayed on the display unit of the terminal, and the response result from the lending user is notified to the data management device 3 (312).
After that, wait for the completion notification from the data management device (31
4).

The data management center 3 judges the contents of the response from the lending destination user (214), and in the case of the permission response, rewrites the data record of the lending destination user in the data management table 5 (216), and the owner H's data record. After sending the update notification to the user terminal (218), the user terminal waits for the authentication notification from the owner terminal (218). If the response from the lending destination user is that the borrowing of the telephone number is rejected, the lending destination terminal ends the lending information registration processing, and the data management center 3
Terminates the lending information registration process after notifying the user terminal of the owner H of the lending refusal. In this case, the owner terminal is
After displaying that fact on the display unit, the lending information registration process ends.

When the owner terminal receives the update notification from the data management device 3, the owner terminal requests the owner H to input the personal identification code for personal authentication, and when the user H is authenticated, the authentication notification including the priority order. To the data management center 5 (1
26), and wait for the completion notice from the data management center 5 (1
28). Upon receiving the authentication notification, the data management center 3 updates the priority order of the user H and the user A in the data management table 5 (222), and then sends a procedure completion notification to the owner terminal and the lending terminal ( 224), the registration process ends. When the owner terminal and the lending destination terminal receive the completion notification, the owner terminal and the lending destination terminal reflect the results of lending the telephone number in the management tables provided in the owner terminal and the lending destination terminal (129, 316), and then terminate the lending information registration processing.

In the owner terminal, if the password input by the user is mistaken for a predetermined number of times (N times) (122), the process is interrupted (130) and the user setting stored in the work area is set. The data is erased (132), and the lending information registration process ends. In this case, the data management center determines that the owner terminal could not authenticate the user because the authentication waiting state (220) times out, and after returning the data management table 5 to the state before the update, The lending information registration process ends. Similarly, in the lending destination terminal, the completion notification waiting state (220) times out, so it is determined that there is a problem in lending the telephone number, and the lending information registration processing is performed without updating the resource management table. finish. However, when personal authentication fails,
The owner terminal may notify the data management center to that effect, and the data management center may issue a similar notification to the lending destination terminal to terminate the lending information registration process without waiting for a timeout.

FIG. 10 shows a processing sequence when the owner H of the telephone number cancels the lending of the telephone number to the borrower A. The owner H can check the relationship between the owned telephone number and the lending destination by displaying the contents of the lending destination management table 20 on the display unit of the terminal (140). When the owner sets the cancellation data (the telephone number to be rented out and the rented-out telephone number) (142), a cancellation request including these pieces of information is transmitted to the data management center 3 (1
44). In response to the cancellation request, the data management center 3 checks the resource in the data management table 5 (23
After performing 0), a cancellation notice is sent to the telephone number of the borrower A (232), and when a permission notice is received from the borrower (32)
0), update the data management table 5 according to the cancellation content (234), and notify the owner terminal of the update (236),
The completion notice (237) is transmitted to the borrower terminal. When the owner terminal receives the update completion from the data management center, the owner terminal updates the lending management table 20 and the resource management table 30 according to the contents of cancellation this time (146),
The cancellation processing ends.

FIG. 11 shows a processing sequence for forcibly canceling the lending of a telephone number without obtaining the consent of the borrower. When the owner H specifies forced release and sets release data (a telephone number to be released for lending and a lender's telephone number) (143), a forced release request including the release information is sent to the data management center 3 Sent to (14
5). Upon receiving the forced release request, the data management center 3 updates the data management table 5 according to the release content without obtaining the permission of the borrower A (234), and notifies the owner terminal of the update (236), The forced release completion notice (238) is transmitted to the borrower terminal.

Next, the call sequence using the borrowed telephone number will be described with reference to FIG. Here, the same telephone number lent by the owner H is assigned to four users A to
Suppose D is sharing.

When the user B, who is one of the sharing parties, makes a call to the user K by using the borrowed telephone number, the user B designates the borrowed telephone number as the billing destination telephone number and then designates the telephone number of the called destination K. Dial (401). The input data is transmitted to the data management center 3 by designating the charging destination telephone number (402). The data management center
Check resources with the data management table 5,
After setting the charging destination to the borrowed telephone number (403), the telephone number of the receiving destination K is called (404).

When the callee K responds, the data management center 3 establishes a connection between the caller terminal and the callee terminal to put the users B and C into a call state, and the caller user terminal is busy. Is stored in the data management table 5 (405). When a new connection request (calling) is made with the same phone number while another user is talking using the borrowed phone number, the data management center rejects the new connection request (calling). Whether or not the borrowed telephone number is being used can be determined when the data management table 5 is checked or when the charging destination is set.

On the other hand, when the user K calls (410) the borrowed telephone number shared by the users A to D,
User A who is once connected to the data management center 3 and who has the first priority to the telephone number from the data management table 5
The unique telephone number 53A of is searched. In this case, the data management center 3 calls the terminal of the user A (41
2) When the user A responds, a connection is established between the terminals of the user A and the user K and the call state is established (41
3).

In FIG. 13, when a call is made to the borrowed telephone number, the user K, who is the sender, shares the borrowed telephone number with the shared users A to.
An embodiment will be shown in which the destination can be selected from D. When the user K makes a call (420) to the borrowed telephone number shared by the users A to D, the data management center 3 uses the registered data of the data management table 5 to indicate that the destination telephone numbers are three or more users. It is determined to be the shared number (421). In this case, the data management center 3
Checks the relationship between the unique telephone number owned by the borrower of the telephone number and the incoming call priority from the data management table 5, and then requests the caller K to specify the destination selection mode (422). The request is made, for example, by transmitting a selection menu for selecting one of a mode for connecting in order of priority and a mode for specifying a called party by a telephone number.

In response to the selection request, if the caller K specifies, for example, the priority-ordered connection mode (424), the data management center 3 determines from the data management table 5 that the borrowed telephone numbers have the incoming call priority order. The unique telephone number of the user who is ranked first, for example, user A is read (440), the telephone number is called (441), and the caller terminal is calling user A. A message to that effect is sent (442). Here, if the user A does not respond within the predetermined time, the data management center 3 reads out the unique telephone number of the user having the second priority of incoming call, for example, the user B (450), and responds to the telephone number. Call (451)
At the same time, the caller terminal is notified that user B is making a call (452).

When the user B responds (453), the data management center 3 connects the user B and the caller K (45).
4) At the same time, the caller terminal is requested to select a call (455). As the call selection request, for example,
A selection menu having three options of (a) call determination, (b) next priority telephone number, and (c) designation of destination selection mode is transmitted. Here, if the caller selects (b) (4
56), in the data management center 3, user B and sender K
The unique telephone number of the user having the next incoming call priority, for example, the user C is canceled (460), the telephone number is called (461), and the caller terminal is called. Notify the user C that a call is being made (46
2).

When the user C responds (463), the data management center 3 connects the user C and the sender K (464).
And the options (a) to (c) for the sender terminal.
Request a call selection (4
65). Here, when the caller selects the option (a) for determining the call (466), the connection between the user C and the caller K is maintained and the call state is set.

As described above, when the callee is a telephone number shared by a plurality of users, the callee selection logic which gives the caller a selection right is adopted instead of the callee priority order to lend the caller. It is possible to take various incoming call forms for telephone numbers.

[0048]

As is apparent from the above embodiments, according to the present invention, one terminal can selectively use the unique telephone number and the temporarily lent telephone number, and the company side By lending the contracted telephone number to the employee terminal, it becomes possible to separate the charge destination of the communication charge for private use and the charge destination of the communication charge for business use.

[Brief description of drawings]

FIG. 1 is a diagram illustrating lending a telephone number according to the present invention.

FIG. 2 is a diagram for explaining lending of the same telephone number to a plurality of users according to the present invention.

FIG. 3 is a diagram showing an embodiment of a data management table 5 provided in a data management center.

FIG. 4 is a diagram showing an example of a lending destination management table 20 and a resource management table 30 provided in a user terminal.

FIG. 5 is a diagram showing a schematic configuration of a communication network to which the present invention is applied.

FIG. 6 is a block diagram showing an embodiment of a user terminal (telephone device terminal).

FIG. 7 is a diagram showing an example of an operation surface of a user terminal.

FIG. 8 is a diagram showing a rental information registration sequence of a telephone number.

FIG. 9 is a flowchart showing the operations of the owner terminal, the data management center, and the borrower terminal in the telephone number lending registration procedure.

FIG. 10 is a diagram showing a telephone number lending cancellation sequence.

FIG. 11 is a diagram showing a forced lending release sequence of a telephone number.

FIG. 12 is a diagram showing an example of an outgoing / incoming sequence using a borrowed telephone number.

FIG. 13 is a diagram showing another embodiment of the incoming sequence to the shared telephone number.

[Explanation of symbols]

1: Telephone network, 2: Base station, 3: Data management center, 4:
Server, 5: Data management table, 10: User terminal (telephone terminal device), 20: Rental management table, 30:
Resource management table.

Claims (5)

[Claims] 1. A management center connected to a telephone network registers a borrowed telephone number from another user terminal in association with a telephone number unique to each user terminal, and a user who uses the borrowed telephone number is registered. After specifying the borrowed telephone number as the billing destination, notify the management center of the destination telephone number, and after the management center sets the billing destination to the designated telephone number, A communication method using a borrowed telephone number, which is characterized by connecting to. 2. A management center connected to a telephone network is provided with a telephone number unique to each user terminal, a borrowed telephone number from another user terminal, and the above-mentioned unique telephone number and the borrowed telephone number are given priority in receiving incoming calls. When the connection request having the borrowed telephone number as the destination is received from the source user terminal, the management center identifies the source user terminal by the destination priority information. A communication method using a borrowed telephone number, characterized by connecting to the user terminal. 3. A management center connected to a telephone network is provided with a telephone number unique to each user terminal, borrowed telephone numbers from other user terminals, and priority given to incoming calls to the unique telephone number and the borrowed telephone number. The priority information is registered, and when a connection request is made from the source user terminal with the borrowed telephone number as the destination, the management center identifies the source user terminal as the user specified by the destination priority information. A communication method using a borrowed telephone number characterized by selectively connecting to a terminal or a specific user terminal designated by a sender. 4. A memory for storing a pre-designated terminal-specific telephone number and a borrowed telephone number lent from another user terminal, and a telephone to be charged from among the telephone numbers stored in the memory. A telephone terminal device comprising means for designating a number and making a call to a destination telephone number. 5. A means for communicating with a control system connected to a telephone network to execute a control procedure for lending and borrowing a telephone number, a telephone number unique to a terminal and a borrowed telephone number from another user terminal. A telephone having a memory for storing and a means for calling a called telephone number by designating a telephone number to be charged from among the telephone numbers stored in the memory. Terminal device.