JP2819230B2 - Key telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key telephone apparatus connected to a basic interface of an ISDN.

[0002]

2. Description of the Related Art With the recent expansion of ISDN networks, ISDN
A key telephone device connected to a line is becoming popular. This ISDN line is referred to as a basic interface, and has a 64Kbps B capable of communicating voice or data.
It has a 1B2 channel (2B channel) and a D channel of 16 Kbps which is a control channel. In this case, the key telephone apparatus accommodates the ISDN line in the external line interface of the main apparatus and performs a corresponding protocol processing based on the ISDN transmission format. Also, between the main unit and the key telephone, two B
2B + D described above consisting of a channel and one D channel
The transmission is performed in accordance with the transmission format.

[0003]

In such a key telephone apparatus, most of the key telephones housed therein have only a voice function. Therefore, although the key telephone has two B channels,
Normally, for example, only the B1 channel is used, and the B2 channel is in an idle state, which causes a problem that the line utilization efficiency is poor.

Accordingly, the present invention provides a key telephone device with an I
When connected to an SDN line, the object is to improve the line use efficiency.

[0005]

SUMMARY OF THE INVENTION The present invention to solve such problems, consisting each of at least two or more B-channels and the control signal D channel for transmitting the transmitting voice or data signals The key telephone apparatus which accommodates the ISDN lines in the main apparatus, connects a plurality of key telephones to the main apparatus via the corresponding first transmission lines, and performs exchange connection between each key telephone and each ISDN line. , the key telephone set, is connected to the main apparatus via the first transmission path that signal through a predetermined two B channels of the two or more B-channels are transmitted plants
A parent telephone to which one of the predetermined two B channels is allocated; and a child telephone connected to the parent telephone via the second transmission path and to which the other B channel is allocated , and The telephone sets the D channel from the main unit.
Incoming call based on incoming call data transmitted via
Whether the data is incoming data to a slave phone
Determining means for determining whether the incoming call data is
If it is determined that the data is incoming call,
Is performed and it is determined that the data is incoming data to the child telephone
Is the control to convert to the incoming call data and send it to the child phone
Means . Further, the predetermined connected to via main apparatus the first transmission path that signal through a predetermined two B channels of the two or more B-channels are transmitted 2
A key telephone set to which one of the two B channels is assigned; and a radio telephone set connected to the parent telephone set via a third transmission line which is a radio path and to which the other B channel is assigned. Configure the above parent phone
Indicates an incoming call transmitted from the main unit via the D channel.
Incoming call data to itself or wireless based on data
Determining means for determining whether the data is incoming data to a slave unit;
If the incoming data is incoming data to itself,
If it is determined, an incoming call is displayed and the incoming call
Data is converted to the specified incoming call data
Control means for transmitting the data to the wireless slave device .

[0006]

The key telephone connected to the main unit via the first transmission line through which the two B channel signals of the ISDN line are transmitted is the master telephone connected to the main unit via the first transmission line. And a slave telephone connected to the master telephone via a second transmission line.
As the channel is allocated, the B2 channel is allocated to the child telephone. As a result, the idle state of the B channel is avoided, and the line utilization efficiency is improved. Also, a master telephone connected to the main unit via a first transmission path through which two B-channel signals are transmitted, and a wireless slave unit connected to the master telephone via a third transmission path which is a wireless path Thus, a key telephone is constituted. As a result, wiring work or the like when a telephone is added to the main device becomes unnecessary.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 3 is a block diagram showing one embodiment of the key telephone apparatus according to the present invention. In the figure, reference numeral 1 denotes a main unit, and the main unit 1 has B1 and B2 each having a communication speed of 64 Kbps.
It accommodates ISDN lines 21 to 2n having a B2 channel and a D channel having a communication speed of 16 Kbps, and is connected to the key telephones 41 to 4m via transmission lines 31 to 3m (first transmission lines). The above-mentioned main device 1
External line interfaces 111 to 11n connected to the SDN lines 21 to 2n, a time-division switch 12 as a communication channel, and a ping-pong transmission unit 13 for performing ping-pong transmission with each key telephone.
The power supply unit 14 supplies power to each key telephone, a CPU 15, a ROM 16, and a RAM 17.

Here, the CPU 15 of the main device 1 is, for example, an IS
When an incoming call arrives at the DN line 21, the incoming call is recognized through the external line interface 111, and an incoming call is notified to the corresponding, for example, the key telephone 41 via the ping-pong transmission unit 131. When the response of the key telephone 41 is recognized through the ping-pong transmission unit 131, the time division switch 12 is controlled to set the communication path between the ISDN line 21 and the key telephone 41. As a result, a call is made via the B channel between the remote terminal and the key telephone 41 via the ISDN line 21.

When the CPU 15 recognizes the call information from the key telephone 4m through, for example, the ping-pong transmission unit 13m, the CPU 15 sends the ISDN line 2 to the external line interface 11n.
A call protocol is performed with a network (not shown) via n. Then, the response of the partner terminal is sent to the outside line interface 11.
When it is obtained from n, the time-division switch 12 is controlled to set the corresponding communication path. As a result, a call is made via the B channel between the remote terminal and the key telephone 4m via the ISDN line 2n.

As described above, the ISDN line is composed of two B channels and one D channel. In this case, 1 during a call on the key telephone 4 side.
Only one B channel is used, and the other B channels are idle. For this reason, a key telephone connected to the key telephone apparatus is provided with a parent telephone and a child telephone so that each telephone can simultaneously communicate using two B channels.

FIG. 1 is a block diagram showing a configuration of such a key telephone, and the key telephone 4 is composed of the parent telephone 40 and the child telephone 50 as described above.
Here, master telephone 40 is a ping-pong transmission unit 41 that transmits a signal (2B + D) composed of two B-channel signals and one D-channel signal to main device 1 via transmission path 3, and a sound signal of B1 channel. And a power supply circuit 43 for converting power from the main device 1 and supplying the power to the respective units of the parent telephone 40 and the child telephone 50, a CPU 44, an operation unit 45, a display unit 46, and the like. Is done. In addition, each signal line and power supply line (second line) of the master telephone 40 are connected via the connectors CN1 and CN2 and the cable CB.
The sub-telephone 50 is connected to the composite codec 5 that encodes and decodes a B2 channel audio signal and the like.
1, a CPU 52, an operation unit 53, a display unit 54, and the like.

By the way, the composite codec 42 in the master telephone 40 synchronizes with the frame CLK indicating the frame clock and the shift CLK indicating the shift clock from the ping-pong transmission unit 41 to transmit B1 data, that is, audio data of the B1 channel. It performs encoding and decoding. That is, the audio signal from the transmitter T or the microphone MC1 is encoded in synchronization with each of the clocks, and the audio signal from the main apparatus (the other party) is decoded and output to the receiver R or the speaker SP1.

The CPU 44 in the master telephone 40 transmits D-channel control data (Dch data) from the main unit 1 to a serial I / O (SI / O1 terminal) in synchronization with the shift CLK of the ping-pong transmission unit 41. When received via this data format, the address on this data format is referred to, and if this address is its own address, necessary processing such as control for the composite codec 42 and display control for the display unit 46 is performed. When a transmission operation or the like from the operation unit 45 is detected, SI /
Output to the ping-pong transmission unit 41 via the O1 terminal
To send to. If the control data from main device 1 is not destined for itself, CPU 44 serially transmits the control data to slave phone 50 via the SI / O2 terminal, and also sets the slave phone via the SI / O2 terminal. When receiving the control data from 50, the control data is output to the ping-pong transmission unit 41 via the SI / O1 terminal and transmitted to the main device 1.

The composite codec 5 in the child telephone 50
1 encodes and decodes B2 data, that is, audio data of the B2 channel, in synchronization with the frame CLK and the shift CLK from the ping-pong transmission unit 41. That is, the transmitter T
Alternatively, the audio signal from the microphone MC2 is encoded in synchronization with each of the clocks, and the audio signal from the main device is decoded and output to the receiver R or the speaker SP1.
Further, when receiving the control data from the CPU 44 of the parent telephone 40 via the SI / O3 terminal, the CPU 52 in the child telephone 50 performs necessary processing such as control on the composite codec 51 and display control on the display unit 54. Then, when a transmission operation or the like from the operation unit 53 is detected, the parent telephone 40 transmits control data indicating operation information via the SI / O3 terminal.
, And as a result, the control data is transmitted to the main device 1 via the parent telephone 40. The power of the slave phone 50 is supplied from the power supply circuit 11 of the master phone 40.

Next, FIG. 4 shows a main unit 1 and a key telephone 4.
FIG. 4 is a diagram showing a format of control data between the main telephone and the sub telephone 50. Here, the data format between the main device 1 and the key telephone 4 is shown in FIG.
As shown in (a), a flag area 101, an address area 102, and a control area 10 each having a plurality of bits are provided.
3, the data in the information area 104, the check area 105, and the flag area 106 are arranged in the order of transmission. As shown in FIG. 4B, the data format between the parent telephone 40 and the child telephone 50 is such that data of an address area 201, a control area 202, an information area 203, and a check area 204 are arranged in the order of transmission.

The main unit 1 recognizes the addresses of the parent telephone set 40 and the child telephone set 50 connected to each transmission path 3 and set in the address area 102 of FIG.
When an incoming call arrives and the incoming call restriction information and the like in the RAM 17 are detected and the incoming call is determined to be an incoming call to the parent telephone 40,
The address of the parent telephone 40 is set in the address area 102, the data indicating the incoming call is set in the control area 103 and the information area 104, and check bits and flags for the transmission check are set in the other areas. Is transmitted to the key telephone 4 side as D channel information through. When receiving the control data of the D channel, the CPU 44 of the parent telephone 40 constituting the key telephone 4 receives
The address 02 is compared with its own address stored and stored therein. Since they match, the incoming call data is received and the incoming call is displayed on the display 46 or the like.

Off-hook is performed by the parent telephone 40 for this incoming call display, and when this is detected by the CPU 44, the CPU 44 sets its own address in the address area 102, and sets off-hook information in the control area 103 and the information area 104, respectively. Then, the data is transmitted to the main device 1 via the ping-pong transmission unit 41. In this case, the main device 1 uses the parent telephone 4
It is determined that the incoming call has a response of 0, and the protocol control is performed so that the incoming call of the master telephone set 40 is performed via the B1 channel of the ISDN line 2. As a result, the CPU 4 of the parent telephone 40
4, the composite codec 42 is controlled, and an incoming call is made via the B1 channel of the master telephone 40.

When the main unit 1 determines that the incoming call arriving at the ISDN line 2 is an incoming call to the sub telephone 50, the address of the sub telephone 50 is indicated in the address area 102 and the incoming call is indicated in the control area 103 and the information area 104. The data is set and transmitted to the key telephone 4 side. In this case, since the address of the address area 102 is not its own address in the parent telephone 40, the received control data is
The data is converted into the data format shown in FIG.
Send to The CPU 52 of the slave phone 50 receives the incoming call data and displays an incoming call on the display unit 54 or the like.

Off-hook is performed on the incoming call display in the sub telephone 50, and when this is detected by the CPU 52, the CPU 52 causes the address area 20 shown in FIG.
1 to the control area 202 and the information area 2
03, the off-hook information is set respectively,
Send to When receiving the control data, the CPU 44 of the parent telephone 40 converts the control data into the format shown in FIG. 4A because it is not its own address, and transmits it to the main device 1 via the ping-pong transmission unit 41. in this case,
Since the address area 102 of the main device 1 is the address of the child telephone 50, it is determined that the incoming response is for the child telephone 50, and the child telephone 50 is transmitted via the B2 channel of the ISDN line 2.
The protocol control is performed so that the incoming call is performed. As a result, the composite codec 51 is controlled by the CPU 52 of the slave phone 50, and the incoming call is made via the B2 channel of the slave phone 50.

The outgoing call based on the dial operation of each of the operation units 45 and 53 in the parent telephone 40 and the child telephone 50 is also performed based on the respective addresses of the parent telephone 40 and the child telephone 50 similarly to the case of the incoming telephone call. This is performed via the corresponding B1 channel and B2 channel. As described above, the key telephone apparatus includes a key telephone 4 connected to a main apparatus via one transmission line 3 and a main telephone 40 and a sub telephone 5.
0, and the parent telephone 40 and the child telephone 50 are connected by a cable or the like. The parent telephone uses the B1 channel, and the child telephone 50 uses the B2 channel.
This allows a telephone call to be made via a DN line.
As a result, the use efficiency of the ISDN line is improved, and the ping-pong transmission unit and the power supply circuit can be shared on the telephone side, so that the total cost of the device can be reduced. When a telephone is added, the main unit 1 is connected to a long cable as in the conventional case.
Since it is possible to connect to the nearest telephone with a short cable without performing work such as wiring to a telephone, an apparatus excellent in workability can be provided.

FIG. 2 is a block diagram showing another embodiment of the present invention, in which a parent telephone and a child telephone are connected by radio (third transmission path). That is, the interface unit 60 is connected to the parent telephone 40 shown in FIG. 1 via the connectors CN1 and CN2 and the short cable CB, and the interface unit 60 and the parent telephone 40 are integrated. 70 are connected. Here, the interface unit 60 is provided with the above-described composite codec 51 and the CPU 52, and a wireless communication unit 61 and an antenna AT1 for wirelessly communicating the audio signal of the composite codec 51 and the control signal of the CPU 52.
Is provided.

The wireless slave 70 is provided with an antenna AT2 for performing wireless communication with the interface unit 60, a wireless communication unit 71, and a CPU 72 for controlling the wireless slave 70. The transmitter T, the receiver R, the microphone MC2, and the speaker SP2 of the sub telephone 50 are connected to the wireless communication unit 71, and the operation unit 53 and the display unit 54 are connected to the CPU 72. With such a configuration, there is no need to perform any additional work when adding a secondary telephone set that performs a call through the B2 channel to the parent telephone set 40 that performs a call through the B1 channel of the ISDN line. Can be connected.

[0023]

As described above, according to the present invention, I
A key telephone connected to the main unit via a first transmission line through which two B channel signals of the SDN line are transmitted; a master telephone connected to the main unit via the first transmission line; 2 and a slave telephone connected to the master telephone via the transmission line 2. In addition, the B1 channel is assigned to the master telephone and the B2 channel is assigned to the slave telephone. And the efficiency of use of the line is improved. Further, the key telephone is constituted by a master telephone connected to the main unit via a first transmission path, and a wireless slave connected to the master telephone via a third transmission path which is a radio path. Therefore, wiring work or the like when adding a telephone to the main device is omitted, and there is an effect that the telephone can be added as needed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a main part of a key telephone apparatus according to the present invention.

FIG. 2 is a block diagram showing another embodiment of the key telephone apparatus.

FIG. 3 is a block diagram showing a configuration of the key telephone device.

FIG. 4 is a diagram showing an example of a data format used inside the key telephone apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main apparatus 21-2n ISDN line 31-3m Transmission line 41-4m Button telephone 111-11n External line interface 12 Time division switch 131-1n, 41 Ping-pong transmission part 14 Power supply part 15,44,52,72 CPU40 Main telephone 42 , 51 composite codec 43 power supply circuit 45, 53 operation unit 46, 54 display unit 50 slave phone 60 interface unit 61, 71 wireless communication unit 70 wireless slave unit

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-3-143094 (JP, A) JP-A-4-68997 (JP, A) (58) Fields investigated (Int.Cl. ⁶ , DB name) H04Q 3/58 107

Claims (2)

(57) [Claims] A main unit accommodates a plurality of ISDN lines each including at least two or more B channels for transmitting a voice signal or a data signal and a D channel for transmitting a control signal, and supports a plurality of key telephones. each of the first through the transmission line connected to the main device, the key telephone system for exchanging connection with each key telephone and the ISDN line, the two or more predetermined two B channels of the B channels
One of the predetermined two B-channels connected to the main unit via the first transmission path through which a signal is transmitted
The key telephone is composed of a parent telephone to which the B channel is assigned, and a child telephone connected to the parent telephone via the second transmission path and to which the other B channel is allocated , wherein the parent telephone comprises: From the main unit via the D channel
Incoming call data based on the incoming call data
Data or incoming data to the slave phone
Determining means for determining whether an incoming call has occurred.
If it is determined that the data is incoming data to itself,
Display, and determine that the data is incoming data to the sub-telephone.
If it is set, it is converted to the specified incoming call data and
A key telephone device comprising: a control unit for transmitting the key telephone to the telephone. 2. A main unit accommodating a plurality of ISDN lines each comprising at least two or more B channels for transmitting a voice signal or a data signal and a D channel for transmitting a control signal, and supporting a plurality of key telephones. each of the first through the transmission line connected to the main device, the key telephone system for exchanging connection with each key telephone and the ISDN line, the two or more predetermined two B channels of the B channels
A main telephone connected to the main unit through the first transmission path through which a signal is transmitted via the first transmission line, to which one of the predetermined two B channels is assigned; Connected via a third transmission path
The key telephone is configured from a wireless handset to which a channel is assigned, and the master telephone is configured to receive a D channel from the main device.
To itself based on the incoming call data transmitted through the
Or the incoming call data to the wireless handset.
Determination means for determining whether the
It is determined that the incoming call data is incoming call data for itself.
If a call is received, an incoming call is displayed and the incoming call data to the
If it is determined that the
A key telephone device comprising: a control unit for transmitting to the wireless slave device.