JPH0654081A - Isdn communication equipment - Google Patents

Abstract

PURPOSE:To make a substitutive response by the present ISDN (integrated service digital network) communication equipment when there is no connection request by monitoring the calling state of the other ISDN communication equipment on the same bus for a certain period of time at the time of an incoming call. CONSTITUTION:This equipment is composed of an ISDN line interface part 10, key input part 11, display part 12, speaking part 13, calling tone generation part 14, self communication equipment control part 15 to execute the control of the incoming call according to an ISDN communication procedure, timer part 17 to monitor the presence/absence of a first connection message from another ISDN communication equipment 2 for a certain time, and other communication equipment monitor part 16. When the first call message of the other ISDN communication equipment 2 is detected after the terminated call message is returned, the timer part 17 is activated and when the timer part 17 is completed without detecting the first response message, a second call message is sent. Then, a ring back tone is generated, the second connection message is sent by off-hook, and the response is made by proxy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN communication device which responds by proxy when another integrated service digital network (ISDN) communication device connected to the same bus does not respond when receiving a call.

[0002]

2. Description of the Related Art ISD of Nippon Telegraph and Telephone Corporation (NTT)
N basic speed interface service "ISN Net 6
Since "4" started in April 1988, there is an increasing demand for the same service that can send and receive voice, data and images by digital signals on the same line. This "INS Net 64"
Is two 64 kbit / s information channels (Bch) and 16
It is composed of one kilobit / second signal channel (Dch). Bch is used for transmitting information such as voice and data, and Dch is mainly used for transmitting call control messages such as line setting / release between the terminal and the ISDN network.

In a subscriber's house, up to eight ISDN communication devices can be connected on a bus line including a transmission line pair and a reception line pair, and up to two Bch circuit switching services can be enjoyed at the same time.・ Multipoint service "is provided.

FIG. 4 is a block diagram showing the configuration of a conventional ISDN communication apparatus. A conventional example will be described below with reference to FIG.

The conventional own ISDN communication device 1b is
The ISDN line interface unit 10 connected to the transmission bus 301 and the reception bus 302 of the N basic interface by the transmission line pair 101 and the reception line pair 102, the key input unit 11 for inputting a telephone number, and the key input unit 11 are used. A display unit 12 for displaying information such as a telephone number and a caller number from the ISDN network 4 and charge notification, a communication unit 13 including a transmitter, a receiver, a voice encoder / decoder, and a hook switch, and its own line It is composed of a ringing tone generating section 14 for notifying an incoming call to a destination and a self-communication device control section 15 for controlling the entire wearing, and the respective sections 10 to 15 are interconnected by a system bus 103. Further, the call section 13 and the ISDN line interface section 10 are connected by a signal line 131.

On the other hand, the other ISDN communication device 2 having the respective units 10 to 14 equivalent to the own ISDN communication device 1b is a transmission line pair.
A transmission line 301 and a reception line pair 202 are connected to the transmission bus 301 and the reception bus 302, respectively. Transmission bus 301 and reception bus
302 is an IS via the line terminating device 3 and the ISDN line 401.
It is connected to the DN network 4.

FIG. 5 is a sequence diagram showing an incoming call operation in this conventional example. ISDN network 4 to ISDN line
401, an incoming call message (SETUP) arriving in a broadcast format to the receiving bus 302 via the line terminating device 3, a receiving line pair 202,
The other ISDN communication device 2 and the own ISDN communication device 1b simultaneously receive via the reception line pair 102, respectively.

Other ISDN communication device 2 own communication device control unit
15 is the ISDN line interface unit 10 and system bus
After receiving the incoming call message (SETUP) via 103, ID
Assemble a request (ID REQ1) command and send it via the system bus 103 and ISDN line interface line 10.
The same command is transmitted to the SDN network 4. Thereafter, another ISDN communication device 2 assigns an ID (ID ASS1) in the same manner.
Response received, data link setting request (SABME1)
The data link is set by a series of sequence of command transmission and unnumbered response (UA1) response reception.

On the other hand, the self ISDN communication device 1b also receives the ID request (ID RE) after receiving the incoming call message (SETUP).
Q2) The data link is set by a series of sequence of command transmission, ID assignment (ID ASS2) response reception, data link setting request (SABME2) command transmission, and unnumbered response (UA2) response reception.

Next, the other ISDN communication device 2 and the own ISDN communication device 1b respectively call the ISDN network 4 with a call (ALERT1) message and a call (ALER).
T2) The message is transmitted, and each ringing tone generation unit 14
Drive and ring the bell. The ISDN network 4 uses the call
Upon receipt of a response (RR) response to the (ALERT1) message and the call (ALERT2) message, it is confirmed that both ISDN communication devices are ringing.

The following description will be continued by taking the case where the other ISDN communication device 2 responds (RR) as an example. In the conventional example,
After detecting the off-hook, the other ISDN communication device 2 transmits a connection request (CONN1) message, and a response (RR) response and connection confirmation (CONN ACK1) from the ISDN network 4.
After receiving the message and sending the response (RR) response,
You are in a call. Upon detecting the on-hook due to the end of the call, the other ISDN communication device 2 transmits a disconnection request (DISC1) message, receives a response (RR) response and a release (REL1) message from the ISDN network 4, and then releases the release (RSC).
The incoming call is released by sending the EL COMP1 message and receiving the response (RR) response. Furthermore, other ISDN
The communication device 2 releases the data link by transmitting a data link disconnection request (DDISC1) command and receiving a non-numbering response (UA1), and ends a series of incoming sequences.

[0012]

DISCLOSURE OF THE INVENTION Two ISDN communication devices of the same type (for example, ISDN telephone) connected on the same bus
One of the methods to selectively receive calls to one of the two is (1) by subscribing to the direct dial-in service, assigning different phone numbers to each phone, and specifying the destination by individual phone number, (2) each phone There are two methods: assigning different subaddresses to, and designating the destination by representative telephone number + subaddress.

In the method (1), a subscriber accommodated in either an ISDN network or a telephone network can receive a call to a designated telephone, but a direct dial-in number added in addition to the representative telephone number. It is not economical because it requires a monthly contract fee. The method (2) does not incur any cost for assigning the subaddress, but the subscriber accommodated in the telephone network cannot enter the telephone number to which the subaddress is added, so that selective call reception is impossible.

After all, without any additional cost,
Two ISDN of the same type connected from the telephone network to the same bus
There is no way to selectively receive one of the phones.
As described in the above-mentioned conventional example, when an incoming call is received at the representative telephone number, the bells of the two telephones ring at almost the same time, making it impossible to distinguish who the incoming call is.

Therefore, in the conventional method of selectively receiving an incoming call, there is no incoming call priority between the two telephones, and the caller cannot always make a call with a desired party.

An object of the present invention is to solve the above-mentioned conventional drawbacks and to improve the convenience by making a proxy response even when the other ISDN communication device handler is absent.

[0017]

In order to solve the above problems, the present invention provides, in addition to the conventional ISDN communication device, a key input means for instructing the start and stop of the proxy response function,
A means for detecting a call message transmitted by another ISDN communication device on the same bus, a means for monitoring the presence or absence of a connection message transmitted by another ISDN communication device for a certain period of time, and a connection message of another ISDN communication device after the certain period of time If not, the call message of the own ISDN communication device,
Proxy response means involving transmission of a connection message.

[0018]

According to the present invention, when the proxy response function of the own ISDN communication device is in the activated state and the IS
When the DN communication device does not respond, the bell of the own ISDN communication device rings, and the off-hook enables the call instead of the other ISDN communication device.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to FIGS.

FIG. 1 shows an ISDN according to an embodiment of the present invention.
It is a block diagram which shows the structure of a communication apparatus. The own ISDN communication device 1a of this embodiment includes an ISDN line interface unit 10, a key input unit 11, a display unit 12, a call unit 13, and a ringing tone generation unit 14 of the conventional ISDN communication device 1b of FIG. ,
In addition to the own communication device control unit 15 that controls the entire device, another communication device monitoring unit 16 that detects the sending of the calling message and the connection message of the other ISDN communication device 2 and the presence or absence of the connection message of the other ISDN communication device 2. And a timer unit 17 for monitoring the above for a certain period of time.

The key input unit 11 of the present embodiment has a function of starting / stopping the proxy response function, and the own communication device control unit 15 has a function of controlling other blocks in the own ISDN communication device 1a to make a proxy response. Have respectively.

Further, the ringing tone generating section 14 is designed so that the ringing tone is different between the incoming call when the substitute response is stopped and the incoming call when the substitute response is activated.

Further, each of the above 10 to 17 is a system bus.
Interconnected at 103. In addition, the call unit 13 and ISDN
The line interface unit 10 is connected by a signal line 131. ISDN line interface unit 10 and line terminator 3
Is the transmission line pair 101, the route of the transmission bus 301, and the reception line pair 10
2. Connected via the route of the reception bus 302. Conventional ISD
Other than IS communication device 1b and ISDN communication device 2 and own IS
The DN communication device 1a is interconnected with the transmission line pair 201, the transmission bus 301, the transmission line pair 101, and the reception line pair 202, the reception bus 302, and the reception line pair 102.

FIG. 2 is a sequence diagram showing an operation in the case where the other ISDN communication device 2 on the same bus responds and makes a call when an incoming call arrives in one embodiment of the present invention. Own ISDN
It is assumed that the communication device 1a is set in the proxy response mode by the key input unit 11 in advance. Receives an incoming call (SETUP) message in a broadcast format from the ISDN network 4, and
The SDN communication device 2 and the own ISDN communication device 1a receive an unnumbered response (UA1) response and an unnumbered response (UA2) response, respectively, until the data link is set up. Since it is the same as that described in step 1, the description will be omitted.

The other ISDN communication device 2 immediately sends a call (ALERT1) message after setting the data link.
It returns to N network 4. The other communication device monitoring unit 16 of the own ISDN communication device 1a detects this call (ALERT1) message via the reception bus 302, the reception line pair 102, the ISDN line interface unit 10, and the system bus 103, and the own communication device control unit 15 To that effect.

The own communication device controller 15 uses the system bus 103.
The timer unit 17 having the time Tc as a time limit is activated via the route.
Here, the time Tc is the maximum time from the start of the ringing of the other ISDN communication device 2 to the start of the call by off-hook, and is set to a value (10 seconds as an example) shorter than the maximum call allowable time (180 seconds) of the ISDN network 4. Set it.

Next, the other ISDN communication device 2 sends a connection request (CONN1) message off-hook,
Response (RR) response from the DN network 4, connection confirmation (CON
NACK1) message is received and the same connection confirmation (CONN
A response (RR) response to the ACK1) message is returned, and the call state is established.

On the other hand, the other communication device monitoring unit 16 of the own ISDN communication device 1a is requested to connect to the other ISDN communication device 2 (CON
N1) Send message to receive bus 302, receive line pair 102, I
The detection is performed via the SDN line interface unit 10 and the system bus 103, and the self communication device control unit 15 is notified accordingly. The own communication device control unit 15 stops the timer unit 17 via the system bus 103.

When the other ISDN communication device 2 finishes the call,
A disconnection request (DISC1) message is transmitted in the same sequence as the conventional example triggered by on-hook, a response (RR) response and a release (REL1) message are received from the ISDN network 4, and a response (RR) to the release (REL1) message is received. )
When the response is returned, the release completion (REL COMP1) message is transmitted, and the response (RR) response is received, the call is released. Further, the other ISDN communication device 2 transmits a data link disconnection request (DDISC1) command, receives an unnumbered response (UA1) response to this, and releases the data link.

As can be seen from the above operation sequence,
If the other ISDN communication device 2 responds within the time Tc after the ringing of the bell, the other ISDN communication device 2 does not ring the bell of the own ISDN communication device 2 as if the other ISDN communication device 2 selectively received the call. Can handle

FIG. 3 is a sequence diagram showing the operation in the case where the ISDN communication device 1 on the same bus does not respond and the local ISDN communication device 1 responds by proxy in the case of an incoming call in one embodiment of the present invention. It is assumed that the ISDN communication device 1a itself has been set in the proxy response mode by the key input unit 11 in advance. Incoming call from ISDN network 4 in broadcast format (SE
TUP) message is received, and the other ISDN communication device 2 and own ISDN communication device 1a receive unnumbered response (UA1) response and unnumbered response (UA2) response, respectively, until the data link is set. Is the same as in FIG.

The other ISDN communication device 2 immediately issues a call (ALERT1) message after setting the data link.
It is returned to the DN network 4. The own ISDN communication device 1a is shown in FIG.
By the same operation as the above, the timer unit 17 whose time is Tc (10 seconds as an example) is started. The timer unit 17 notifies the self-communication device control unit 15 of the event that the timer has expired after the lapse of time Tc after activation. The own communication device controller 15 calls the call (ALE
RT2) Assemble message, and send the message to system bus 103, ISDN line interface unit 10, transmission line pair 1
01, the transmission bus 301, the line terminating device 3, and the ISDN line 401 to transmit to the ISDN network 4, and the system bus 10
The ringing tone generation unit 14 is instructed via 3 to start ringing the bell.

After recognizing the response (RR) response from the ISDN network 4 via the ISDN line interface unit 10 and the system bus 103, the own communication device control unit 15 waits for the off-hook detection from the communication unit 13.

When the off-hook is detected from the call section 13 via the system bus 103, the own communication apparatus control section 15 detects the ISDN.
A connection request (CONN2) message is sent to the network 4. Further, the own communication device control section 15 receives the response (RR) response and the connection confirmation (CONN ACK2) message from the ISDN network 4, and then returns the response (RR) response, and at the same time, the call section 13 and the ISDN line interface section 10 A call path to and from the ISDN network 4 is formed via the signal line 131.
And a call between itself and the ISDN communication device 1a are possible.

When the communication unit control unit 15 detects an on-hook from the call unit 13 via the system bus 103, it determines that the call has ended and sends a disconnection request (DISC2) message to the ISDN network 4. Further, the own communication device control unit 15 uses the ISDN
After receiving the response (RR) response and release (REL2) message from the network 4, the response (RR) response and release completion (R)
EL COMP2) message is returned and a response (RR) response is received.

After that, the own communication device controller 15 transmits a data link disconnection request (DDISC2) command, and sends an unnumbered response (UA2) response to the command to the ISDN network 4
Upon further reception, the series of proxy response sequences is terminated.

The incoming operation sequence when the own ISDN communication device 1a is set to the proxy response function stop mode by the key input unit 11 matches the sequence of the conventional example of FIG. In this case, the own ISDN communication device 1a and other ISDN
There is no incoming call priority with the communication device 2, and both have an equal relationship.

The own ISDN communication device 1 of the above embodiment
Although a has been described as an ISDN telephone, the call section 13 of the own ISDN communication device 1a is replaced with an existing analog terminal interface or digital terminal interface I.
The present invention can be applied to the SDN terminal adapter.

The present invention is also effective in the case where the ringing pattern, pitch, volume, etc. of a bell that notifies an incoming call are changed depending on the start / stop mode of the proxy response function of the own ISDN communication device 1a.

[0040]

As described above, in the ISDN communication device of the present invention, when another ISDN communication device of the same bus does not respond for a certain time after receiving a call, the ISDN communication device of the present invention activates the proxy response function. As a result, it is possible to substitute the communication addressed to another ISDN communication device. That is, even if the person who handles the other ISDN communication device is absent due to leaving the desk, etc.
Since the proxy response is made by the communication device, the convenience is improved. Also, during activation of the proxy response function, the bell of other ISDN communication devices on the same bus is given priority to ring, so it is possible to subscribe to either the ISDN network or the telephone network without contracting for a pay dial-in service. There is also the effect that the call from the person can be economically selected and received.

The present invention is an economy that can realize the convenience improvement effect by implementing the proxy response function not only for ISDN telephones but also for ISDN terminal adapters that accommodate existing terminals and the free selective call receiving function. Effect can be expected.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an ISDN communication device according to an embodiment of the present invention.

FIG. 2 is a sequence diagram (when another ISDN communication device responds) showing an incoming call operation of the ISDN communication device of one embodiment of the present invention.

FIG. 3 is a sequence diagram showing an incoming operation of the ISDN communication device according to the embodiment of the present invention (when another ISDN communication device does not respond).

FIG. 4 is a block diagram showing a configuration of a conventional ISDN communication device.

5 is a sequence diagram showing an incoming call operation of the ISDN communication device of FIG.

[Explanation of symbols]

1a ... Own ISDN communication device according to one embodiment of the present invention, 1b.
Conventional ISDN communication device, 2 ... Other ISDN communication device, 3 ... Line terminating device, 4 ... ISDN network, 10 ... I
SDN line interface section, 11 ... Key input section, 12
... Display, 13 ... Talk, 14 ... Ring tone generator, 15 ...
Own communication device control unit, 16 ... Other communication device monitoring unit, 17 ... Timer unit, 101, 201 ... Transmission line pair, 102, 202 ... Reception line pair, 103 ... System bus, 131 ... Signal line, 301 ... Transmission bus, 302 ... reception bus, 401 ... ISDN line.

Claims (6)

[Claims] 1. An integrated service digital network basic speed interface function, which is interconnected with other integrated service digital network communication devices on the same bus of the integrated service digital network basic speed interface and has an integrated service digital network basic speed interface function. Comprehensive service digital network line interface section, key input section for instructing start / stop of proxy response function, display section for displaying start / stop status of proxy response function of own comprehensive service digital network communication device, transmission, From a call unit having a receiving function and a hook switch state detection function, a ringing tone generation unit, a local communication device control unit that controls an incoming call according to a general service digital network communication procedure, and another general service digital network communication device. And a timer unit for monitoring the presence or absence of the first connection message of The function of detecting the first call message and the response message of the other integrated service digital network communication device which has returned to the integrated service digital network after receiving the incoming call message from the service digital network, and detected the first called message. If the first connection message from the other integrated service digital network communication device is not activated before the expiration of the timer unit at the time point, the integrated service digital network is accessed after the expiration of the timer. Of the second call message to the self-communication device control section, the generation of a ringing sound to the ringing sound generation section, and the second call to the integrated service digital network by the off-hook state notification from the communication section. Other communication device manager having a function of instructing the own communication device control unit to send a connection message and making a proxy response An integrated service digital network communication device having a viewing section. 2. When the key input unit gives an instruction to stop the proxy response function, immediately after receiving an incoming call message from the integrated service digital network, a second ring message is sent to the integrated service digital network and a ring tone is output. 2. The integrated service digital network communication device according to claim 1, wherein after the occurrence, the second connection message is sent to the integrated service digital network by detecting the off-hook state. 3. An integrated service digital network telephone characterized in that the call section according to claim 1 has a transmitter, a receiver, a voice encoder / decoder, and a hook switch. 4. An integrated service digital network terminal adapter, wherein the call unit according to claim 1 has a non-integrated service digital network terminal interface function. 5. The integrated service digital network telephone according to claim 3, wherein the integrated service digital telephone has a ringing tone generation section that has different ringing tones when an incoming call is received when a proxy response is stopped and when an incoming proxy response is activated. Network telephone. 6. The integrated service digital network terminal adapter according to claim 4, characterized in that it has a ringing tone generating section that has different ringing tones when an incoming call is received when the proxy response is stopped and when an incoming proxy response is activated. Service Digital network terminal adapter.