JPH04245756A - Communication equipment - Google Patents

Abstract

PURPOSE:To simply connect a communication equipment such as a cordless telephone set consisting of a main telephone system and a sub-telephone system to a digital line such as an ISDN. CONSTITUTION:A memory 22 for storing the attributes of respective sub- telephone systems is included in the main telephone system 10, and at the time of incoming, the system 10 detects the attribute of an incoming signal, discriminates the sub-telephone system corresponding to the attribute from the data stored in the memory 22 and transmits the incoming signal to the discriminated sub-telephone system.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device suitable for application to a communication device connected to a digital line such as ISDN.

0002

[Prior Art] Conventionally, within a certain range (for example, a radius of 100
Various types of cordless telephones that can be moved freely have been put into practical use. This cordless telephone consists of a base unit that is directly connected to a telephone line and a handset that is carried by a caller, and communication is performed wirelessly between the base unit and the handset. In this case, there are some devices in which a plurality of child devices can be installed for one parent device.

[0003] Here, an example of the configuration of a cordless telephone connected to a general telephone line is shown in FIG. 6. This cordless telephone is a system in which three handsets can be used, and at the end of the analog telephone line 1, The telephone line interface 3 of the base unit 2 is connected. A wireless transmitting/receiving section 4 is connected to the telephone line interface 3, and the processing in the telephone line interface 3 and the wireless transmitting/receiving section 4 is performed under the control of the control section 5. That is, under the control of the control unit 5, after the telephone line interface 3 receives a signal transmitted from the central office via the telephone line 1, the received signal is transmitted to the wireless transmitting/receiving unit 4 for wireless transmission on a predetermined channel. The modulated signal is then transmitted from the antenna 6 as a wireless signal to any of the handsets 7, 8, and 9. In this case, each handset 7, 8, 9 is provided with a speaker, a microphone, a dial key, etc. for making calls. In each slave unit 7, 8, 9, an antenna 7 connected to each slave unit 7, 8, 9
This radio signal is received by terminals a, 8a, and 9a, and circuits within each of the slave units 7, 8, and 9 determine to which slave unit the transmission is made based on a control signal included in the radio signal. When it is determined which handset it is, the corresponding handset performs reception processing, and the audio is reproduced from the speaker of this handset.

[0004] Also, the audio picked up by the microphones of the slave units 7, 8, and 9 is modulated into a signal for wireless transmission by circuits within each slave unit 7, 8, and 9, and this modulated signal is It is transmitted from antennas 7a, 8a, and 9a. Then, this transmission signal is received by the wireless transmitting/receiving section 4 of the base unit 2 via the antenna 6, and transmitted to the telephone line 1 via the telephone line interface 3. In this way, the slave unit 7,
8 and 9 allow so-called outside calls.

[0005] Furthermore, by specifying any other handset from each handset 7, 8, and 9 and transmitting a wireless signal to the base unit 2, it is possible to make calls between the handsets (so-called extension calls). It has become.

On the other hand, as a telephone line, ISDN (Inte
rated ServicesDigital
A digital line called ``Network: Integrated Service Digital Network'' has begun operating. By using this ISDN, various data can be efficiently transmitted, and various controls such as designation of a receiving terminal can be performed. In other words, by identifying the terminal connected to each subscriber using subaddresses, dial-in numbers, etc., it is possible to call only the desired terminal from among the multiple terminals connected to one line. can.

[0007]

[Problem to be Solved by the Invention] By the way, when connecting telephone equipment installed in each home etc. to ISDN, it is necessary to
An SDN terminal adapter is required. That is, for example, when connecting the above-mentioned cordless telephone to ISDN, it is necessary to use the telephone line interface 3 as an ISDN terminal adapter. By doing so, at least each handset 7, 8, and 9 can make a call via ISDN.

However, in the case of a cordless telephone, simply changing the telephone line interface 3 to an ISDN terminal adapter does not make it possible to receive the above-mentioned services such as terminal designation that are possible with ISDN. That is,
Unless a circuit is installed on each handset 7, 8, and 9 to determine the ISDN sub-address, dial-in number, etc., it will not be possible to receive services such as terminal designation, and calls will be made in the same way as with normal analog telephone lines. ISDN is not used effectively. However, all handset
Providing a terminal adapter compatible with SDN would complicate the configuration of the handset, resulting in an inconvenience that the system configuration of the cordless telephone would become large-scale. Furthermore, similar inconveniences occur not only in cordless telephones but also in cases where a telephone device in which a plurality of handset units are connected to a base unit via signal lines is connected to an ISDN.

An object of the present invention is to provide a communication device having a plurality of slave units, such as a cordless telephone, with an ISDN network using a simple configuration.
The aim is to make it compatible with digital lines such as

0010

[Means for Solving the Problems] The present invention provides a communication device comprising a main telephone device connected to an ISDN and a plurality of sub telephone devices connected to the main telephone device, as shown in FIG. 1, for example. , the main telephone device is provided with a memory 22 for storing the attributes of each sub-telephone device, and when a call is received, the main telephone device detects the attribute of the incoming signal and identifies the sub-telephone device corresponding to this attribute from the data stored in the memory 22. , the incoming call signal is transmitted to the identified sub-telephone device.

[0011]

[Function] By doing this, the main telephone equipment side can control the sub telephone equipment based on the attributes of the incoming signal, and the receiving terminal can be selected without detecting the attributes of the incoming signal on each sub telephone equipment side. The configuration of each sub-telephone device can be simplified.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In this example, a cordless telephone is connected to an ISDN, and FIG. 1 shows a base unit of the cordless telephone according to the embodiment.
It is connected to N line i. That is, the end of the ISDN line i is connected to the ISDN interface 11 in the base unit 10 of the cordless telephone. This ISDN interface 11 receives signals transmitted from the central office via the communication line i, and supplies the received signals to necessary circuits. Further, the outgoing signal supplied from the circuit in the base unit 10 to the ISDN interface 11 is converted into an ISDN outgoing signal and sent to the ISDN line i. in this case,
A control unit 12 of this base unit 10 is connected to the ISDN interface 11, and incoming and outgoing calls are processed under the control of this control unit 12. At this time, when the audio signal is converted into digital data and transmitted over ISDN line i,
The ISDN interface 11 converts this digital data into an analog audio signal. Furthermore, when transmitting an analog voice signal to the ISDN line i, it is converted into digital data to form a transmission signal.

Reference numeral 13 in the figure indicates a transmitting section. This transmitting section 13 is supplied with a signal to be transmitted to a slave device, which will be described later, and the frequency signal supplied from a frequency synthesizer 14 is used to convert the signal to be transmitted to a predetermined frequency ( (a predetermined channel), and this modulated signal is wirelessly transmitted from the antenna 16 to a predetermined slave device. Furthermore, the receiving section 16 demodulates the radio signal received by the antenna 16 from the handset. In this case, the receiving section 16 is also supplied with a frequency signal from the frequency synthesizer 14, and demodulation from a predetermined transmission channel is performed based on this frequency signal.

Further, a speaker 18, a microphone 19, and a dial key 20 are connected to the control unit 12 via a man-machine interface 17. The speaker 18 and the microphone 19 constitute a telephone receiver, and the dial key 20
You can perform operations such as making calls using the main unit 10.
I am able to make calls using line i.

The control unit 12 also includes a dial memory 21.
and a data memory 22 are connected to each other, the dial memory 21 stores speed dial data used when making a call by operating the dial key 20, etc., and the data memory 22 stores data regarding each handset. The data regarding each handset includes a dial-in number, sub-address, attributes, etc. set for each handset. Each of this data is I
Dial-in numbers (direct dial-in numbers: DDI) are required to execute various services that are possible with SDN. By making a call using this dial-in number, you can call only the corresponding handset. The sub-address is a unique number set for each handset, and by inputting this sub-address following the dial number set for each user when making a call, only the corresponding handset can be called. In addition, attributes are data indicating the attributes of each handset (or device connected to the handset), such as a handset that can make normal calls, a handset that can make high-quality voice calls, and a facsimile device connected. The types of handsets, such as those connected to a telex device, connected to a telex device, and connected to a videotex device, are shown. Further, as other data indicating this attribute, various data related to low layer consistency and various data related to high layer consistency are stored in the data memory 22.

Note that if the base unit also has settings such as a dial-in number, sub-address, attributes, etc., this data is also stored in the data memory 22. Further, if there is other data necessary to execute various services available through ISDN, it is also stored in the data memory 22.

Next, the overall system configuration of this cordless telephone is shown in FIG. 2. In this example, one main unit 10
Five handsets 31, 32...35 are prepared for the antenna 41, 42...45 connected to each handset 31, 32...35 and the antenna 15 of the base unit 10. Wireless communication takes place. In this case, the first handset 31 and the second
The handset 32 is a telephone capable of normal voice communication, and is equipped with a speaker, a microphone, and a dial key that constitute a receiver. Further, the third handset 33 is connected to a facsimile machine 51 and is capable of sending and receiving documents. Further, the fourth handset 34 is a telex device 5.
2 is connected, and it is possible to send and receive character data, etc. Further, the fifth handset 35 is the videotex device 5.
3 is connected, and it is possible to send and receive image data, etc. Data regarding signals handled by each of these slave units is stored in advance in the data memory 22 described above. Note that, in the case of the telephones 31 and 32 capable of voice communication, if either one is a telephone for high-quality voice, data regarding this is also stored in the data memory 22.

[0019] Using a cordless telephone configured as described above, the operation when there is an incoming signal from ISDN line i is explained.The incoming ISDN signal contains various call setting messages, and this message is The ISDN interface 11 makes a determination, and the determined result is sent to the control unit 1.
Supply to 2. Here, the determination operation of this call setup message is shown in the flowchart of FIG. 3. First, the ISDN interface 11 checks the protocol identifier of this incoming signal (step 101). The control unit 12 determines whether there is a dial-in number (called number) (step 102). Then, when there is a dial-in number, the control unit 12 uses the data stored in the data memory 22 to
A handset (terminal) with the specified dial-in number set
It is determined whether there is one (step 103). If there is a corresponding handset (any one of the first handset 31 to fifth handset 35), it is further determined whether or not a subaddress is specified in the message (step 104). When a sub-address is specified, the control unit 12 detects a slave unit to which the designated sub-address is set from the data stored in the data memory 22, and the detected slave unit is a slave unit designated by the dial-in number. It is determined whether the machine is the same as the machine (step 105). If they are the same, it is determined that an incoming signal is to be transmitted to the handset specified by the dial-in number and subaddress, and if the attributes described below match, a wireless signal is sent to the corresponding handset to request an incoming call. to transmit. Then, when the corresponding handset performs a receiving operation in response to this incoming call request, the incoming signal that has been subjected to predetermined processing is transmitted, and the handset executes the receiving operation of the incoming signal (step 106).

[0020] If no subaddress is specified in step 104, an incoming call request is transmitted by radio signal to the handset specified by the dial-in number if the attributes described later match. Then, when the corresponding handset performs a receiving operation in response to this incoming call request, the incoming signal that has been subjected to predetermined processing is transmitted, and the handset executes the receiving operation of the incoming signal (step 106).

If it is determined in step 102 that there is no dial-in number, then it is determined whether or not a subaddress is specified in the message (step 107). When a subaddress is specified, the control unit 1
2 determines from the data stored in the data memory 22 whether there is a child device to which the designated sub-address is set (step 108). When there is a corresponding handset, if the attributes described below match, an incoming call request is transmitted to the handset specified by the sub-address, and when the corresponding handset performs a receiving operation due to this incoming call request, The incoming signal that has been subjected to predetermined processing is transmitted, and the handset is caused to receive the incoming signal (step 106).

[0022] Furthermore, when the protocol identifier cannot be correctly determined in step 101, when it is determined that there is no handset that corresponds to the dial-in number specified in step 103, and when the protocol identifier specified by the dial-in number is determined in step 105, When the handset specified by the dial-in number and the handset specified by the sub-address do not match, or when it is determined in step 108 that there is no handset corresponding to the sub-address specified, all messages regarding this dial-in number and sub-address are ignored ( Step 109).

[0023] After processing messages regarding these dial-in numbers and subaddresses, when the corresponding handset is detected and step 106 is reached, identification is performed based on attributes, and only when the attributes match, the corresponding handset is identified. to perform the operation of receiving an incoming signal. That is, as shown in the flowchart of FIG. 4, the attribute is determined from the message of the incoming signal (step 201), and the handset specified by the dial-in number and/or the subaddress has the attribute indicated by the message. Determine whether the attributes match. For example, it is determined whether the transmission capability of each handset matches the incoming signal. It is also determined whether attributes such as low layer compatibility and high layer compatibility match the incoming signal.

Here, when the attributes match, signal processing is performed using the corresponding attributes (step 202). Also,
If the attributes do not match, the message regarding the attributes is ignored (step 203).

[0025] Furthermore, even when all messages related to the dial-in number and sub-address are ignored in step 109 described above, the attributes are determined in the same way, and it is determined whether there is a handset with attributes that match the incoming signal. At this time, if there is a child device with matching attributes, processing related to the child device with matching attributes is performed. That is, after transmitting an incoming call request to a handset with matching attributes, an incoming call operation is performed, an incoming signal that has been subjected to predetermined processing is transmitted, and this handset executes an incoming signal receiving operation. For example, if the dial-in number and subaddress are not specified in the incoming signal message,
When the attribute indicates that the signal is a facsimile signal, the incoming signal is transmitted only to the third handset 33 to which the facsimile device 51 is connected.

As described above, according to the cordless telephone device of this example, the ISDN interface 11 is installed only on the base unit 10 side.
Despite the configuration with IS installed, each handset 31 to 35
Various possible services are performed by the DN. In other words, when there is a message regarding the dial-in number and subaddress or a message regarding attributes in the incoming signal, the process corresponding to this message is executed under the control of the base unit 10, and each slave unit responds to the message without having to judge the message. This process simplifies the configuration of a cordless telephone that can be connected to an ISDN line. In this case, the base unit 10 only needs to have one ISDN interface 11 regardless of the number of slave units, so the configuration is simpler than before, especially when there are a large number of slave units. Also, on each handset side, ISDN
Since there is no need to take any precautions regarding cordless telephone equipment, and there is no need for each handset to memorize a dial-in number or sub-address number, it is possible to use cordless telephone handsets for widely used analog telephone lines as is. For example, when connecting an ISDN line to a cordless telephone device for an analog telephone line installed in each home, it is only necessary to replace or modify the base unit with a compatible one, which is highly versatile.

[0027] In the above-mentioned embodiments, the base unit and the handset function as a cordless telephone, but the present invention can be applied to various telephone devices comprising a main telephone device and a sub-telephone device. For example, the present invention can also be applied to a system in which a master unit and a slave unit are directly connected by a signal line. That is, as shown in FIG. 5, the base unit 10 connected to the ISDN line i,
In the case of a telephone device in which the respective handsets 31 to 35 are directly connected by a signal line, and communication between the base unit 10 and the handsets 31 to 35 is carried out via these signal lines, the base unit 1
0 may be provided with an ISDN interface so that the base unit 10 can select a slave unit. Also in the case of the example shown in FIG. 5, the same effects as in the above-mentioned embodiment can be obtained.

Furthermore, in the above-mentioned embodiment, only the case where reception is performed by each handset has been explained, but when reception is performed by a receiver (speaker 18, microphone 19) connected to base unit 10 via man-machine interface 17, Similarly, I
Of course, various services possible with SDN can be realized.

Further, in the above-mentioned embodiment, only the processing at the time of incoming call was explained, but various processing corresponding to ISDN may be performed on the main unit 10 side also at the time of outgoing call. For example, a message to be added to an outgoing signal is sent to the ISD under the control of the control unit 12 based on data stored in the data memory 22.
N interface 11 and make a call to ISDN line i. In this case, the message includes the attributes of the handset that made the call, the calling number, the calling sub-address, the sub-address specified at the time of the calling, etc. That is, for example, when adding the attributes and calling sub-address of the calling handset to a message, the control unit 12 determines the calling handset, reads data regarding the determined handset from the data memory 22, and adds the attributes. and determine the subaddress,
This determined attribute and subaddress (originating subaddress)
append to the message.

Furthermore, it goes without saying that the present invention is not limited to the above-mentioned embodiments, but can take various other configurations.

[0031]

According to the present invention, when a communication device consisting of a main telephone device and a sub-telephone device is connected to a digital line such as ISDN, the sub-telephone device It is possible to receive services such as selection of a receiving terminal without detecting the attributes of an incoming signal on each sub-telephone device side, and the configuration of each sub-telephone device can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing a base unit of a cordless telephone according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a system configuration of a cordless telephone according to an embodiment of the present invention.

FIG. 3 is a flowchart diagram for explaining one embodiment of the present invention.

FIG. 4 is a flowchart diagram for explaining one embodiment of the present invention.

FIG. 5 is a configuration diagram showing another embodiment of the present invention.

FIG. 6 is a configuration diagram showing an example of a conventional cordless telephone.

[Explanation of symbols]

10 Base unit 11 ISDN interface 12 Control section 22 Data memory 31 First slave unit 32 Second slave unit 33 Third slave unit 34 4th slave unit 35 5th slave unit 51 Facsimile machine 52 Telex device 53 Videotex equipment i ISDN line

Claims (1)

[Claims] Claim 1. A communication device comprising a main telephone device connected to a digital line from which a receiving terminal can be selected, and a plurality of sub telephone devices connected to the main telephone device, wherein the main telephone device is provided with each of the above. A memory is provided to store the attributes of the sub telephone device, and when a call is received, the main telephone device detects the attribute of the incoming signal, identifies the sub telephone device corresponding to this attribute from the data stored in the memory, and uses the determined sub telephone device. A communication device that transmits an incoming signal to a telephone device.