JP4221311B2 - IP telephone, IP telephone adapter, and telephone return program - Google Patents

Description

  In the present invention, when a call is made from a first user to a second user and a return call is made from the second user to the first user, a call charge is charged to the first user. The present invention relates to an IP telephone, an IP telephone adapter, and a telephone return program that can establish a call without being charged.

When a call is established by calling the second telephone from the first telephone, an agreement is formed between the user of the first telephone and the user of the second telephone, and the line is immediately disconnected. Then, there is a case where a method called callback for re-calling the user of the first telephone from the user of the second telephone is performed (for example, see Non-Patent Document 1).
JP 2003-229959 A

  Currently, IP phones and non-IP phones such as general phones, mobile phones, and PHS are mixed. And in many cases, non-IP phones adopt a fee structure in which call charges increase according to the number of calls and call time, while IP phones pay a fixed call charge regardless of the number of calls and call time. Adopts a fee structure.

  For this reason, when an IP telephone is called from a non-IP telephone, the IP telephone may call back to the non-IP telephone.

  However, when an IP telephone is called from a non-IP telephone, the telephone set of the IP telephone is off-hooked to establish a call, and thus a call charge is charged to the non-IP telephone.

  Therefore, an object of the present invention is to enable callback from an IP phone to a non-IP phone without causing such a charge.

  The first feature of the present invention is an IP telephone, which is extracted from a packet receiving unit capable of receiving a packet, and a source number extracting unit capable of extracting a source number from the received first call packet. A display unit capable of displaying the source number, and a packet generation unit for generating a cancel packet for forcibly disconnecting an incoming call and a second call packet having the source number as a connection destination when the return button is pressed down And a packet transmitter that transmits the second call packet after transmitting the cancel packet.

  The call packet is a packet for requesting connection, and includes, for example, an INVITE message in SIP (session initiation protocol). The cancel packet is a packet that forcibly disconnects the incoming call. “Reject incoming call” at 323 is returned.

  The second feature of the present invention is further provided with a storage unit for storing a transmission source number in advance, and the display unit is extracted when the extracted transmission source number matches the transmission source number stored in the storage unit. It is also displayed that the transmitted source number matches the source number stored in the storage unit.

  There is no particular limitation on the method of “displaying that the extracted source number matches the source number stored in the storage unit”. For example, blinking a specific part, displaying the sender number in a color different from the normal state, displaying a message indicating that they match, the name stored in advance in association with the sender number, etc. May be.

  A third feature of the present invention is that the storage unit also stores the return number in advance in association with the source number, and when the extracted source number matches the stored source number, the packet generation unit The return number is used as the connection destination of the second call packet instead of the caller number.

  For example, an IP telephone number of 050-9999-8888 is stored as a caller number, and a general telephone number of 03-7777-8888 is stored in advance in a storage unit as a return number, and an IP telephone number of 050-9999-8888 is stored. When there is an incoming call, the packet generator generates a call packet having a connection destination of 03-7777-8888.

  According to a fourth aspect of the present invention, when the packet receiving unit receives a packet indicating that the receiver of the source of the first call packet is raised, the packet transmission unit transmits the second call packet again. There is to do.

  The packet transmission unit preferably repeats retransmission until the number of retransmissions reaches a predetermined value.

  According to the first feature of the present invention, the incoming call can be forcibly disconnected by transmitting a cancel packet without off-hooking the handset of the IP telephone, and further by transmitting the second call packet. Then, a call back can be made to the transmission source of the first call packet. By disconnecting the incoming call without off-hooking the handset of the IP telephone, the call from the transmission source of the first call packet is not established. For this reason, it is possible to avoid charging a call charge to the transmission source of the first call packet.

  According to the second feature of the present invention, since it is also displayed on the display unit that the caller number included in the received call packet matches the caller number stored in advance, the return button is pressed / pressed. You can quickly determine which is not.

  According to the third feature of the present invention, a number different from the caller number is stored in the storage unit in advance, and a call packet having the stored number as a connection destination is generated and transmitted. Even for a number different from the caller source number included in the received call packet, it is possible to make a return call without charging the caller.

  According to the fourth aspect of the present invention, even if the transmission source of the first call packet does not go on hook immediately after receiving the cancel packet, the second call packet is automatically transmitted again. If the transmission source of the first call packet goes on-hook within a predetermined number of times or time, the transmission side of the second call packet does not need to perform a series of actions of on-hook, then off-hook, and redialing.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, the embodiments described later do not limit the technical scope of the present invention.

  FIG. 1 shows the overall configuration of an embodiment of the present invention. As shown in FIG. 1, a general telephone 112 on the receiving side is connected to an IP telephone adapter 113 such as VoIPGW (Voice Over Internet Protocol Gateway) or VoIPTA (Voice Over Internet Protocol Terminal Adapter) via a telephone line 114, and a network. It is connected to the IP telephone network 101 via a cable 105. The IP telephone 111 on the receiving side is connected to the IP telephone network 101 via the network cable 104 without passing through the VoIP GW 113 or the like. Both the general telephone 112 and the IP telephone 111 on the receiving side have a number display function.

  A general telephone set 122 serving as a first transmission side (or source) is connected to the IP telephone network 101 via a VoIP GW (or VoIP TA) 123. The IP telephone 121 serving as the first transmission side is connected to the IP telephone network 101 without going through the VoIP GW 123 or the like.

  The IP telephone 132 serving as the second transmission side is connected to the public telephone network 103 via the VoIP GW (or VoIP TA) 133. The general telephone 131 on the second transmission side is connected to the public telephone network 103 without going through the VoIP GW 133 or the like.

  The mobile phone 141 serving as the third transmitting side establishes a call with the receiving side via a mobile phone network (not shown), a public telephone network, and an IP telephone network.

  The IP telephone network 101 and the public telephone network 103 are connected to each other by a gateway 102.

  The soft switch 151 is a server that manages the IP telephone environment, and controls connection between IP telephones or between IP telephones and non-IP telephones. The software switch 151 implements a circuit switching service by software on the IP network of the communication carrier. With the soft switch 151, the communication carrier uses the IP network itself as a telephone relay switch.

  2 (a) shows the external structure of the IP telephone, FIG. 2 (b) shows the internal structure of the IP telephone, and FIG. 2 (c) shows the stored contents of the loopback number list storage unit.

  As shown in FIG. 2A, the IP telephone 111 includes a number display unit 211, a return button 212, and a receiver 213.

  As shown in FIG. 2B, the IP telephone 111 includes a packet receiving unit 221, a transmission source number extracting unit 222, a number display control unit 223, a number storage unit 224, a return number list storage unit 225, A return number editing unit 226, a registration number notification unit 227, a packet generation unit 228, and a packet transmission unit 229 are provided. These units are connected so that data can be transmitted and received between them.

  The packet receiving unit 221 receives a packet from the IP telephone network via a network cable.

  The caller number extraction unit 222 extracts a caller number from the received call packet.

  The number storage unit 224 temporarily stores the extracted caller number.

  The return number list storage unit 225 stores the caller number in advance. Further, the return number may be stored in advance in association with the transmission source number. Further, not only the return number but also the name or the like may be stored in advance in association with the caller number.

  As shown in FIG. 2C, when the caller is a mobile phone or a general phone, the same number as the caller number (for example, 090-8888-9999, 06-8888-9999) is stored as the return number. . When the transmission source is an IP telephone, a number (for example, 03-7777-8888) different from the transmission source number (for example, 050-9999-8888) is stored as the return number.

  The registration number notification unit 227 compares the caller number extracted from the received call packet with the caller number stored in advance in the return number, and if both numbers match, the display control is performed. Notify the department.

  The display control unit 223 causes the display unit 211 to display the transmission source number extracted from the packet and stored in the number storage unit 224. Further, the registration number notification unit 227 notifies that the transmission source number extracted from the packet and stored in the number storage unit 224 matches the transmission source number stored in advance in the return number list storage unit 225. In the case of a call, a specific part of the display unit 211 is turned on or blinked, a specific message is displayed on the display unit 211, or a name stored in association with the caller number is displayed. Thus, it is preferable to make it easy to visually confirm that the extracted transmission source number matches the transmission source number stored in advance.

  The return number editing unit 226 is used to edit the contents of the return number list. That is, it is used to add a new source number or return number to the return number list, or to change or delete a source number or return number already stored in the return number list.

  The packet generation unit 228 extracts the cancel packet that forcibly disconnects the incoming call to the IP telephone 111 when the return button 212 is pressed, and the source that is extracted from the received packet and stored in the number storage unit 224 A call packet having a number as a connection destination is generated. The transmission source number stored in the number storage unit 224 matches the transmission source number stored in advance in the return number list storage unit 225, and the return number is stored in association with the transmission source number. In this case, the packet generation unit 228 generates a call packet having the connection number stored as the connection number as the connection destination.

  When the return button 212 is pressed down, the packet transmission unit 229 transmits a cancel packet and then a call packet to the IP telephone network.

  The handset 213 is not off-hook from when the return button 212 is depressed until the cancel packet is generated and transmitted and the incoming call is forcibly disconnected. That is, it remains on-hook.

  FIG. 3 shows a flow of processing from the incoming call to the start of the call or the giving up of the call in the receiving side IP telephone. First, the packet receiving unit 221 receives a call packet, and the caller number extraction unit 222 extracts a caller number from the received call packet.

  S301: The registration number notification unit 227 determines whether the extracted transmission source number is a number registered in the return number list storage unit 225. If it is a registered number, the process proceeds to step S302. If it is not a registered number, the process proceeds to step S303.

  S302: The display unit 211 displays that the transmission source number is a registered number, and the receiving side user determines whether or not to return.

The method for informing that the number is registered is not particularly limited. For example,
Display the name corresponding to the registered number on the display unit 211;
-A message notifying that the number is a registered number such as "Call from registered number" is displayed on the display unit 211.
-A part or all of the display unit 211 may blink.-A part or all of the color of the display unit 211 may be changed to a conspicuous color.

Moreover, the method of notifying that it is a registered number is not limited to visual. For example,
-Output music from a voice output unit (not shown) to notify that it is a registered number.
・ Output a message sound to notify you that it is a registered number, such as “Call from a registered number”, or ・ “Call from Mr. XX” The name corresponding to the registered number may be output from the voice output unit.

  S303: When the transmission source number is not registered in the return number list storage unit 225, the transmission source number is displayed on the display unit 211 as it is. The receiving user determines whether or not to wrap based on the telephone number displayed on the display unit 211.

  S304: When the receiving user determines that “turn back” and the return button 212 is pressed, the incoming call is forcibly disconnected. Specifically, when the return button 212 is pressed, the packet generation unit 228 generates a packet for canceling the incoming call, and the packet transmission unit 229 transmits the generated packet.

  The return button 212 may not be a return “dedicated” button. For example, numerical buttons such as “0”, “1”, “2”..., Buttons other than numbers such as “#”, “*”, and other special buttons are set in advance as folding buttons. It is also possible to press the set button.

  S305: When the receiving side user determines that “it does not return” and the handset 213 is off-hooked, the call is started.

  S306: Call the caller number. Specifically, the packet generation unit 228 generates a call packet with the caller number as the connection destination, and the packet transmission unit 229 transmits the generated packet.

  As shown in the first line of the return number list in FIG. 2C, when a number different from the caller number is stored as the return number, a call packet having the return number as the connection destination is generated. And sent.

  S307: If the other party (that is, the original caller) is off-hooked as a result of the call, the call can be started. As will be described in detail later, as a premise that the other party goes off-hook, the other party needs to be in an on-hook state. That is, it is necessary to temporarily go on-hook at the original transmission source before calling the original transmission source from the original receiving side.

  S308: A call is made for loopback, but if the call is busy (that is, the original caller remains off-hook), the line is disconnected.

  S309: Recalls the number of times designated in advance. If the number of re-calls is less than the specified number, the process returns to step S306. Give up the call after the specified number of repeat calls. The number of times of designation can be set to an arbitrary number that is considered necessary before the initial transmission source user goes on-hook.

(If the wrapping is successful)
A case will be described in which a call is made from a non-IP telephone such as a general telephone, a mobile phone, or a PHS to an IP telephone, and then returned from the IP telephone and a call is started between the non-IP telephone and the IP telephone.

  When the original transmission source (transmission side) is also an IP phone, the transmission source number and the return number may be different as described above. However, except that the source number and the return number are different, this is the same as when the original source is a non-IP phone.

  As shown in FIG. 4, when the user of the general telephone 131 that is the original transmission source picks up the handset and dials the telephone number of the IP telephone 111, the IP telephone 111 is called.

  The telephone number of the general telephone 131 that is the transmission source is displayed on the number display section 211 of the IP telephone 111. When the telephone number of the general telephone 131 is stored in the return number list storage unit 225, this is also displayed on the number display unit 211. When the user of the IP telephone 111 determines that the user wants to return, the return button 212 is pressed down.

  When the return button 212 is pressed down, the packet generator 228 generates a cancel packet for disconnecting the incoming call, and the packet transmitter 229 transmits the generated cancel packet. The transmitted cancel packet is converted into a cancel signal by the gateway and reaches the general telephone 131.

  The call is canceled at the general telephone 131 and the line is disconnected. The user of the general telephone 131 determines that the call is returned from the IP telephone 111 and puts the handset.

  The packet generation unit 228 of the IP telephone 111 generates a call packet with the general telephone 131 as a connection destination, and the packet transmission unit 229 transmits the call packet. The transmitted call packet is converted into a call signal at the gateway and reaches the general telephone 131.

  The general telephone 131 rings (bell rings). When the user of the general telephone 131 picks up the handset (off-hook), the telephone call can be started between the general telephone 131 and the IP telephone 111.

(If wrapping fails)
A case will be described in which a call is made from a non-IP telephone to an IP telephone and a return is attempted from the IP telephone, but a call cannot be started between the non-IP telephone and the IP telephone.

  When the original transmission source (transmission side) is also an IP phone, the transmission source number and the return number may be different as described above. However, except that the source number and the return number are different, this is the same as when the original source is a non-IP phone.

  Until the call signal reaches the gateway / soft switch, the call packet reaches the IP phone 111, and further, the cancel packet reaches the gateway / soft switch, and the cancel signal reaches the general phone 131, FIG. Since it is the same, description is abbreviate | omitted.

  As shown in FIG. 5, after receiving the cancel signal, the general telephone 131 cancels the call and the line is disconnected.

The call packet reaches the gateway / soft switch, and the call signal reaches the general telephone 131.
・ When the handset of the general telephone 131 remains lifted, or ・ When the handset of the general telephone 131 is once placed, but the call from the IP telephone 111 arrives at the general telephone 131, the call is made from a third party. Reaches the general telephone 131 and a call is started with the third party.
The packet receiver 221 of the IP telephone 111 receives a packet indicating that a call is in progress.

  In the IP telephone 111, after waiting for a predetermined time, the packet transmission unit 229 transmits the call packet again. If the call signal reaches the general telephone 131 via the gateway / soft switch, but the telephone receiver is still raised or is talking to a third party, the packet receiver 221 of the IP telephone 131 is in a call. The indicated packet is received again.

  The IP telephone 111 includes a counter (not shown) that counts the number of outgoing call packets, a storage unit (not shown) that stores a predetermined number of call repetitions, and a caller that is designated as a counter value. A comparison unit (not shown) for comparing the number of call repetitions. Then, the packet transmission unit 229 repeats the re-call until the number of transmissions reaches the designated number. If the general telephone 131 is still busy even after repeating the specified number of calls, the packet transmitter 229 gives up the call.

  In the second embodiment, the receiving side is not an IP telephone, but a combination of a general telephone 112 and an IP telephone adapter 113. The IP telephone adapter 113 is VoIP GW, VoIP TA, or the like.

  As shown in FIG. 6A, the reception-side general telephone 112 includes a display unit 611 and a return button 612. Similar to the first embodiment, the return button 612 may not be a return “dedicated” button.

  As shown in FIG. 6B, the general telephone 112 further includes a signal input unit 613, a number display control unit 614, and a signal output unit 615.

  As shown in FIG. 6C, the IP telephone adapter 113 includes a packet receiving unit 621, a transmission source number extracting unit 622, a signal output unit 623, a number storage unit 624, a signal input unit 630, and a return number. A list storage unit 625, a return number editing unit 626, a registration number notification unit 627, a packet generation unit 628, and a packet transmission unit 629 are provided.

  The IP telephone adapter 113 will be described.

The packet receiver 621 is similar to the packet receiver 221
The source number extraction unit 622 is similar to the source number extraction unit 222 in the same manner.
The number storage unit 624 is similar to the number storage unit 224.
The return number list storage unit 625 is similar to the return number list storage unit 225.
The return number editing unit 626 is similar to the return number editing unit 226.
Since the packet transmission unit 629 is the same as the packet transmission unit 229, description thereof is omitted.

  The signal output unit 623 outputs a signal notifying the transmission source number extracted by the transmission source number extraction unit 622 to the telephone line 114.

  The registration number notification unit 627 compares the extracted transmission source number with the number stored in advance in the return number list storage unit 625, and if the two numbers match, a signal indicating the fact is sent The data is sent to the output unit 623.

  When the signal output unit 623 receives a signal notifying that both numbers match, the signal output unit 623 also outputs the signal to the telephone line 114.

  The signal input unit 630 receives a signal indicating that the return button 612 has been pressed down via the telephone line 114.

  When a signal indicating that the return button 612 has been pressed is input to the signal input unit 630, the packet generation unit 628 generates a cancel packet for disconnecting the incoming call and a call packet with the caller number as the connection destination.

  The general telephone 112 will be described.

  In the signal input unit 613, a signal for notifying a caller number via the telephone line 114, a caller number extracted by the caller number extraction unit 622, and a call stored in the return number list storage unit 625 in advance. A signal notifying that the original number matches is input.

  The number display control unit 614 controls the number display unit 611 based on the signal input to the signal input unit 613.

  The number display unit 611 displays a caller number, a caller number stored in advance, a name and a message associated with the caller number, and the like.

  When the return button 612 is pressed down, the signal output unit 615 outputs a signal notifying that the return button 612 is pressed down to the telephone line 114.

  The flow of processing from when the IP telephone adapter 113 receives a call packet until it starts a call or gives up the call is almost the same as that of the first embodiment described with reference to FIG. Are executed separately for the IP telephone adapter 113 and the general telephone 112.

  For example, step S301 is executed in the IP telephone adapter 113, but steps S302 to 305 are executed in the general telephone 112, and steps S306 to 309 are executed in the IP telephone adapter 113.

  The IP telephone adapter 113 may not include a transmission source number extraction unit, a return number list storage unit, a registration number notification unit, and the like as a dedicated circuit. It goes without saying that the processing performed by the source number extraction unit or the like may be executed using existing hardware by rewriting the firmware of the IP telephone adapter 113.

  As described above, according to the first or second embodiment, it is possible to return a call without incurring a call charge for the original caller. In addition, when a call is received from a caller registered in advance, the receiving user can easily recognize this. It is also easy to make a return call to a number different from the caller number. Furthermore, when the handset remains raised at the original caller, the call back party can wait for the call to start without repeating the sequence of on-hook, off-hook, and redial. .

It is a block diagram which shows the whole structure of embodiment. 2A shows the external structure of the IP telephone according to the first embodiment, FIG. 2B shows the internal structure of the IP telephone according to the first embodiment, and FIG. 2C shows the loopback number list storage according to the first embodiment. It is a figure which shows the memory content of a part. FIG. 3 is a flowchart showing the flow of processing from the incoming call to the start of a call or the giving up of a call in the IP telephone on the receiving side in the first embodiment. In Example 1, it is a sequence diagram when a call comes from a general telephone and the return is successful. In Example 1, it is a sequence diagram when a call comes from a general telephone and the return is not successful. FIG. 6A shows the external structure of the general telephone of the second embodiment, FIG. 6B shows the internal structure of the IP telephone of the second embodiment, and FIG. 6C shows the IP telephone adapter of the second embodiment. It is a figure which shows an internal structure.

Explanation of symbols

101 ... IP telephone network, 102 ... gateway, 103 ... public telephone network,
104, 105 ... network cable, 111 ... receiving IP phone,
211 ... Number display section, 212 ... Return button, 213 ... Handset,
221 ... Packet receiving unit, 222 ... Source number extracting unit,
223 ... Number display control unit, 224 ... Number storage unit,
225 ... Return number list storage unit, 226 ... Return number editing unit,
227: Registration number notification unit, 228 ... Packet generation unit, 229 ... Packet transmission unit

Claims (12)

A packet receiver capable of receiving packets;
A source number extraction unit capable of extracting a source number from the received first call packet;
A display unit capable of displaying the extracted caller number;
A packet generator for generating a cancel packet for forcibly disconnecting an incoming call and a second call packet having the caller number as a connection destination when the return button is pressed;
An IP telephone comprising: a packet transmission unit that transmits the second call packet after transmitting the cancel packet. It further includes a storage unit that stores the sender number in advance,
The display unit, when the extracted source number matches the source number stored in the storage unit, the extracted source number stored in the storage unit and The IP telephone according to claim 1, which also displays a match. The storage unit also stores a return number in advance in association with the transmission source number,
When the extracted source number matches the stored source number, the packet generator uses the return number as the connection destination of the second call packet instead of the source number The IP telephone set according to claim 1 or 2.   The packet transmission unit retransmits the second call packet when the packet reception unit receives a packet indicating that the receiver of the transmission source of the first call packet is raised. 3. The IP telephone set according to 3. A packet receiver capable of receiving packets;
A source number extraction unit capable of extracting a source number from the received first call packet;
A signal output unit capable of outputting a signal notifying the extracted source number;
A signal input unit capable of inputting a folding signal;
A packet generator for generating a cancel packet for forcibly disconnecting an incoming call and a second call packet having the caller number as a connection destination when a return signal is input;
An IP telephone adapter comprising: a packet transmission unit that transmits the second call packet after transmitting the cancel packet. A storage unit for storing a sender number in advance;
A comparison of the extracted source number and the source number stored in the storage unit, and when these two numbers match, a registration number notification unit capable of outputting a signal to that effect; In addition,
The signal output unit, when the registration number notification unit outputs a signal notifying that the two numbers match, the extracted source number and the source number stored in the storage unit The IP telephone adapter according to claim 5, which also outputs a signal indicating a match. The storage unit also stores a return number in advance in association with the transmission source number,
When the extracted source number matches the stored source number, the packet generator uses the return number as the connection destination of the second call packet instead of the source number The IP telephone adapter according to claim 5 or 6.   6. The packet transmission unit retransmits the second call packet when the packet reception unit receives a packet indicating that the receiver of the transmission source of the first call packet is raised. 7. The IP phone adapter according to 7. IP phone adapter
A packet receiver capable of receiving packets,
A source number extraction unit capable of extracting a source number from the received first call packet;
A signal output unit capable of outputting a signal notifying the extracted source number;
A signal input unit that can input a folding signal,
A packet generator for generating a cancel packet for forcibly disconnecting an incoming call and a second call packet having the caller number as a connection destination when a return signal is input;
A telephone return program for functioning as a packet transmission unit that transmits the second call packet after transmitting the cancel packet. The IP phone adapter
A storage unit for storing a sender number in advance;
Functions as a registered number notification unit that compares the extracted transmission source number with the transmission source number stored in the storage unit and can output a signal to that effect when the two numbers match Let
When the registration number notification unit outputs a signal notifying that the two numbers match to the signal output unit, the extracted source number is stored in the storage unit and the source number stored in the storage unit The telephone loopback program according to claim 9, wherein a signal indicating that they match is also output. In the storage unit, the return number is also stored in advance in association with the transmission source number,
When the extracted source number matches the stored source number, the packet generation unit causes the return number to be the connection destination of the second call packet instead of the source number The telephone return program according to claim 9 or 10. 10. The packet transmission unit causes the packet transmission unit to transmit the second call packet again when the packet reception unit receives a packet indicating that the receiver of the transmission source of the first call packet is raised. 11. The telephone call back program according to 11.

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