JPH04286259A - Isdn telephone set - Google Patents

Abstract

PURPOSE:To enable a call from an opposite side to be executed by making a ringer operate till an incoming call side takes a handset so as to make a telephone set a off-hook state and connecting a line after the ringer operation stops at the time of the off-hook. CONSTITUTION:The ring-back tone generator 5 is provided, inverse calling relying request is set to a user and user information at the time of calling and call setting message is transmitted when the call is executed. After that, the ring-back tone is transmitted to a handset 8 at the time of receiving a release termination message and a response message is immediately transmitted at the time of receiving the call setting message. When a response confirming message is received, the transmission of the ring-back tone is stopped and the handset 8 is connected to a line. The call setting message is received at the time of becoming the incoming call side, inverse calling relying acceptance is set to the user and user information so that the release termination message is transmitted, the ringer is operated, the call setting message is transmitted by off-hook detection, the ringer is stopped and the handset 8 is connected.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to
This relates to SDN telephones.

0002

2. Description of the Related Art When communicating via a public network such as ISDN, charges may vary depending on which terminal makes the call. For example, when conducting international communications, it may be daytime on one side and night on the other due to time differences. In such a case, it is possible to make the call cheaper by making the call at night, since the nighttime discount rate can be used.

[0003]Furthermore, in order to provide some kind of service, there are cases in which it is desired that the called party pays for the telephone call, without having the calling party bear the cost. In order to solve these problems in ISDN, a method using user-user information was proposed at the Information Processing Society of Japan's 39th National Conference 4U-5.
It is described in ``One Proposal for Usage of ISDN User Information''.

[0004] The procedure in this method will be explained based on FIG. Operator A and Operator B each have an ISD
Communication is performed using N terminal A and ISDN terminal B. A request to make a call occurs at operator A. Operator A issues a call request to ISDN terminal A. ISDN terminal A sends a call setup message to the network as usual, but here it sets [call request] and [communication fee] in user-user information.

[0005] The called terminal, that is, ISDN terminal B, compares the [call charge] indicated in the user-to-user information in the received call setup message with the communication charge when the call is made from ISDN terminal B. If it is cheaper to make a call from ISDN terminal B, the user/user information in the release completion message is set to [accept call request] and sent, and the call is temporarily rejected.

ISDN terminal A, which has received the release completion message, indicates to operator A that it accepts the call request. After that, ISDN terminal B sets [call request confirmation] in the user-to-user information and transmits a call setup message. ISDN terminal A, which has received the call setup from the network, transmits a response message, and then, upon receiving the response confirmation message, notifies operator A of the call setup, indicating that the call has been setup.

On the other hand, I that received the response message from the network
SDN terminal B notifies operator B that the call has been set up. This system aims to reduce charges by setting up a call from the ISDN terminal B side using the above procedure.

[0008]

[Problems to be Solved by the Invention] However, when this is applied to a telephone, the following problems arise. 1. Operator A is notified from the telephone that the call request has been accepted, but this is not an operation that normally occurs on a telephone, and the operator needs to newly learn these operations.

2. On the operator B side, the ISDN terminal enters a calling operation without operator B's permission, and a call is set up. Even if operator B is absent, the line will be connected. 3. Operator B learns that a call has been set up by the call setup notification, but in the case of a normal telephone, the operator B will be notified of the incoming call from the telephone (ringer ringing) and until the operator answers the incoming call (until the operator goes off-hook). ) takes a certain amount of time. After receiving the call setup notification, operator A must wait for operator B to answer the phone even though the line has already been connected.

The present invention has been provided in view of the above-mentioned points, and makes it possible to make a call from the side opposite to the side where the call request is made without changing the operability of the conventional telephone. The purpose is to provide an ISDN telephone set with

[0011]

[Means for Solving the Problems] The present invention provides a telephone connected to an ISDN, which includes handset on-hook,
It is equipped with a hook state detection unit that detects an off-hook state, a tone generator that generates a ringback tone, and a ringer that generates a ringing tone. A call setup message is sent with a reverse call request request set, and when a release completion message with reverse call request acceptance set in the user/user information from the called party is received, the tone generator is controlled to generate a ringback tone. a message transmission/reception control means that sends the message to the handset, and then immediately sends it to the called party when a call setup message in which a reverse call notification is set in the user/user information from the called party is received via the message transmission/reception control means. a first response control line connection control that transmits a response message and controls a tone generator to stop sending out the ringback tone and connect the handset to the line when a subsequent response confirmation message is received from the called party; If the called party receives a call setup message with a reverse call request from the calling party, and if the reverse call request is followed, the reverse call request is sent to the user/user information. A release completion message sending/ringing control means that sets call request reception and sends a release completion message to the calling party, and also rings a ringer, and detects off-hook of the called party's handset via a hook state detection unit. Second response control line connection control that sets a reverse call notification in the user-to-user information and sends a call setup message, stops the ringer, and connects the handset to the line after receiving a response message from the calling party. means.

0012

[Function]The device is equipped with a ringback tone generator, and when a call is to be made, a reverse call request request is set in the user/user information at the time of the call, and a call setup message is sent. When a release completion message with reverse call request acceptance set in the user/user information is received, a ringback tone is sent to the handset, and then when a call setup message with reverse call notification set in the user/user information is received, an immediate response is received. When the message is sent and a response confirmation message is received, the ringback tone is stopped, the handset is connected to the line, and if the person becomes the called party, a call setup message with a reverse call request request is received. In this case, if you want to comply with this reverse call request, set reverse call request acceptance in the user information, send a release completion message and ring the ringer, and then when off-hook is detected, set the reverse call request acceptance in the user information. A reverse call notification is set, a call setup message is sent, the ringer is stopped, and the handset is connected to the line after receiving a response message.

[0013]

Embodiment FIG. 2 shows a block diagram of an embodiment of the present invention. ISDN telephone 1 has ISDN receiver driver 2
, an ISDN controller 3 that implements layer 2 and layer 3 protocols, a voice codec 4 , a tone generator 5 that generates a dial tone and a ringback tone, a handset 8 consisting of a speaker 8 a and a microphone 8 b , and a voice codec 4 . an analog switch 6 that switches between the output of the tone generator 5 and the output of the tone generator 5 and connects it to the speaker 8a, and a hook state detector 9 that detects the hook state of the handset.
, a key input section 10 for inputting a dial number, a ringer 11, a CPU 12, a RAM 13, and a ROM 7.

FIG. 3 shows a so-called complaint correspondence diagram, in which the message transmission/reception control means 21 and the first
The response control line connection control means 22 is mainly used. The message transmission/reception control means 21 transmits a call setting message by setting a reverse call request request in the user/user information at the time of making a call, and transmits a call setting message by setting a reverse call request request in the user/user information from the called party. Upon receiving the completion message, it controls the tone generator 5 to send a ringback tone to the handset 8.

[0015] Also, the first response control line connection control means 2
2 immediately transmits a response message to the called party when it receives a call setup message in which a reverse call notification is set in the user/user information from the called party via the message transmission/reception control means 21; When receiving a subsequent response confirmation message from the calling side, it controls the tone generator 5 to stop sending out the ringback tone and connects the handset 8 to the line.

In the case of being the called party, the release completion message sending/ringing control means 23 and the second response control line connection control means 24 are mainly used. The release completion message transmission/ringing control means 23 receives a call setting message in which a reverse call request is set from the calling side, and when complying with this reverse call request, the release completion message transmission/ringing control means 23 sets a reverse call request acceptance in the user/user information. In addition to setting and sending a release completion message to the calling party,
This is to make the ringer 11 ring.

[0017] Also, the second response control line connection control means sets a reverse call notification in the user-to-user information and sends a call setup message when the off-hook of the called party's handset is detected via the hook state detection section. , the ringer is stopped, and the handset is connected to the line after receiving a response message from the calling party. The message transmission/reception control means 21, the first response control line connection control means 22, the release completion message transmission/ringing control means 23, and the second response control line connection control means 24 are controlled by the CPU 1.
Consisting of 2.

Next, the operation of this embodiment will be explained. Figure 1
Operator a and operator b are IS according to this embodiment.
The sequence when making a call using the DN telephone 1 is shown. Here, ISDN telephone 1 used by operator a is called ISDN telephone a, and ISDN telephone 1 used by operator b is
It is assumed that N telephone 1 is distinguished as ISDN telephone b.

When a call request occurs at operator a, the operator takes the handset off-hook. I
In the SDN telephone a, when this off-hook state is detected by the hook state detection section 9, the tone generator 5 generates a dial tone, and the analog switch 6 sends it to the speaker 8a of the handset 8. Next, operator a inputs the telephone number of the connection partner, that is, operator b, into the key input section 1.
Input by 0. ISDN telephone a sends a call setup message to the ISDN network according to this number, but
Set [Reverse call request] and [Communication fee] in the user/user information. The [communication charge] set here is the charge incurred when a call is made from ISDN telephone a to ISDN telephone b.

ISDN telephone b, which received the call setup message, compares the communication charge set in the user-user information with the communication charge for making a call from ISDN telephone b, and then makes a call from ISDN telephone b. If it is cheaper to do so, set ``reverse call request acceptance'' in the user information, send a release completion message, and temporarily reject the connection of the line. At the same time, ringer 11 is sounded,
The operator behaves as if the call is currently being received by operator b.

On the other hand, the IS that received the release completion message
The DN telephone a learns that the ISDN telephone b has accepted a request for a reverse call from the [reverse call request acceptance] set in its user information, and issues a ringback tone from the tone generator 5. to occur. As a result, for operator a, as if it were normal,
As a result of dialing, it behaves as if operator b is currently being called.

When operator b goes off-hook to answer an incoming call, ISDN telephone b detects this using hook state detection section 9, sends a call setup message, and
Make a call to SDN telephone a. At this time, [reverse call notification] is set in the user/user information. At the same time, stop the ringer. ISDN telephone a, which received the call setup message, recognizes from the [reverse call notification] in the user information that this incoming call is a reverse call from ISDN telephone b, and immediately sends a response message. send,
Accept incoming calls.

Thereafter, when the ISDN telephone a receives a response confirmation message from the network, it stops outputting the ringback tone from the tone generator 5, and connects the speaker 8a to the audio codec 4 through the analog switch 6. I
SDN phone b sends a response message. As described above, a conversation between operator a and operator b is started.

FIG. 4 shows a sequence when operator b is absent. In this case, operator a, who is listening to the ringback tone, goes on-hook because operator b is not on the phone. ISDN that detected this
Telephone a has [Cancel reverse call request] in the user information.
and sends a call setup message. Upon receiving the call setup message with [Reverse call request cancellation] set in the user-to-user information, ISDN telephone b stops ringing the ringer and writes [Reverse call request cancellation complete] in the user-to-user information. Set, send release complete, and release the call.

As described above, according to the present invention, in a call between two parties, a call can be made from the side opposite to the side from which the call request is issued, thereby reducing call charges and supporting various services. Moreover, since the operator operates the telephone in the same way as before, there is no need for new learning. In addition, there is no inconvenience of having to connect the line even when the person you want to talk to is absent, and it also prevents the inconvenience of having to wait for the other party to pick up the phone even though the line is connected. can.

[0026]

[Effects of the Invention] The present invention provides a telephone connected to an ISDN, which includes a hook state detection unit that detects the on-hook and off-hook state of the handset, a tone generator that generates a ringback tone, and a ringback tone that generates a ringing tone. If you are the calling party, set a reverse call request request in the user/user information when making a call, send a call setup message, and send a reverse call request to the user/user information from the called party. A message transmission/reception control means that controls a tone generator to send a ringback tone to the handset upon receiving a release completion message in which call request acceptance is set, and then sends a reverse call notification to the user/user information from the called party. Immediately transmits a response message to the called party when the set call setup message is received via the message transmission/reception control means, and controls a tone generator when a subsequent response confirmation message is received from the called party. and a first response control line connection control means for stopping the transmission of the ringback tone and connecting the handset to the line, and in the case of being the called party, a reverse call request request is set from the calling party. When a call setup message is received and the reverse call request is to be followed, a reverse call request reception is set in the user information and a release completion message is sent to the calling party, as well as a release completion message that rings a ringer.・Sound control means;
When off-hook of the called party's handset is detected via the hook state detection unit, a reverse call notification is set in the user information, a call setup message is sent, the ringer is stopped, and a response message is sent from the calling party. and a second response control line connection control means that connects the handset to the line after receiving the call, so when making a call, a reverse call request request is added to the user/user information at the time of making a call. is set and a call setup message is sent, and then when a release completion message with reverse call request acceptance set in the user/user information is received, a ringback tone is sent to the handset, and then a reverse call notification is sent to the user/user information. When a call setup message is received, a response message is immediately sent, and when a response confirmation message is received, the ringback tone is stopped and the handset is connected to the line. When a call setup message with a call request request is received, if the reverse call request is to be followed, the user information is set to accept a reverse call request, a release completion message is sent, and the ringer is sounded. After that, when off-hook is detected, a reverse call notification is set in the user information, a call setup message is sent, the ringer is stopped, and after receiving a response message, the handset is connected to the line. Therefore, it is possible to provide an ISDN telephone that allows a call to be made from the side opposite to the side where a call request has been made without changing the operability of a conventional telephone.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the operation of an embodiment of the present invention.

FIG. 2 is a block diagram of an ISDN telephone.

FIG. 3 is a complaint correspondence diagram.

FIG. 4 is an explanatory diagram of the operation when the operator is absent.

FIG. 5 is an explanatory diagram of the operation of a conventional example.

[Explanation of symbols]

1 ISDN telephone 5 Tone generator 8. Handset 9 Hook state detection section 11 Ringer 21 Message transmission/reception control means

Claims (1)

[Claims] Claim 1: A telephone connected to an ISDN, comprising: a hook state detection unit that detects on-hook or off-hook states of a handset; a tone generator that generates a ringback tone; and a ringer that generates a ringing tone. If you are the calling party, send a call setup message with a reverse call request set in the user/user information when making a call, and accept the reverse call request in the user/user information from the called party. a message transmission/reception control means that controls a tone generator to send a ringback tone to the handset when a release completion message is received, and then a call setting that sets a reverse call notification in the user information from the called party. When a message is received through the message transmission/reception control means, a response message is immediately sent to the called party, and when a subsequent response confirmation message is received from the called party, the tone generator is controlled to generate a ringback tone. and a first response control line connection control means that stops the transmission and connects the handset to the line, and when it becomes the called side, it sends a call setup message with a reverse call request request from the calling side. When receiving the reverse call request and complying with this reverse call request, the release completion message transmission/ringing control means sets a reverse call request acceptance in the user/user information and transmits a release completion message to the calling party, and also causes a ringer to ring. When the off-hook state of the called party's handset is detected through the hook status detection unit, a reverse call notification is set in the user information, a call setup message is sent, the ringer is stopped, and the caller's handset is detected as off-hook. 1. An ISDN telephone set, comprising second response control line connection control means for connecting the handset to the line after receiving a response message.