JPH08171434A - Feeding method for extension board of personal computer - Google Patents

Abstract

PURPOSE: To install a personal computer telephone without increasing the load of a PBX nor decreasing the number of terminals by using the power supply of a personal computer and the power supply of the PBX to feed a telephone set when the power supply of the personal computer is turned on and off respectively. CONSTITUTION: A feeding switch means of a telephone set functions as a circuit which selects a DC converter 4 or a personal computer power supply part 3 to feed private telephone set 10. A feeding changeover switch 7 operates to supply a current to the telephone set 10 from the part 3 and the converter 4 when the power supply of a personal computer is turned on and off respectively. A ringer changeover means selects the converter 4 or the part 3 to feed a ringer circuit 6. Then a ringer changeover switch 8 operates to supply the power to the circuit 6 through the part 3 and the converter 4 when the power supply of the personal computer is turned on and off respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying power to a telephone connected to a personal computer expansion board having a PBX interface. Recently, along with the spread of personal computers, various service functions such as personal computer communication and game software have been added by adding communication functions in addition to the original calculation functions and word processing functions using personal computers. .

[0002] In addition, by connecting a personal computer terminal to a PBX line in a company to exchange information in the company and use it as an electronic mail for transmitting information, it has come to be used in the company. . Therefore, not only a telephone terminal but also a personal computer terminal is connected to the PBX, and a wide range of corporate data communication service networks have been constructed.

Along with this, a dedicated telephone is connected to the personal computer terminal, the function of the multifunctional telephone is given to the personal computer by utilizing the display function of the personal computer, and the personal computer can be used as a telephone terminal while using the personal computer terminal. It's coming. For this purpose, it is necessary to provide a personal computer extension board having a PBX interface in the personal computer main body to connect the dedicated telephone and the personal computer terminal.

[0004]

2. Description of the Related Art FIG. 3 shows an example of the connection configuration between a conventional personal computer body and a PBX. In the figure, 11 is a PBX, 12 is a personal computer main body, 13 is a personal computer expansion board (PCB), 14 is a general telephone (TEL1), and 15 is a personal computer telephone (TE).
L2) and 16 are PBX dedicated telephone interface (I
NF1), 17 are PBX switches (SW), 18 is PBX
Central control unit (CPU1), 19 is a power supply unit (POW) of the personal computer body, 20 is a central control unit (CPU) of the personal computer body
2) is shown.

In the personal computer expansion board (PCB) 13, 21 is an interface (INF2) with the PBX, 22
Is an interface with a personal computer (INF3), 23 is a central control unit (CPU3), 24 is a power supply circuit (BF) to a dedicated telephone, and 25 is a PB signal receiver (PB) from the dedicated telephone.
R), 26 is a DC converter (DD) from the PBX, 27 is a coder / decoder (CODEC), and 28 is a sounder (S).
D) and 29 are ringer circuits.

In the figure, B1 is voice data transmitted / received between the telephone and the PBX, D1 is control data transmitted / received between the telephone and the PBX, and normally B1 and D1 are multiplexed from the PBX via the INF1 to supply power. PC superimposed on voltage
Send to B. Multiplexed B1 and D1 are INF2
The audio data is transmitted to the CODEC and the control data is transmitted to the CPU 3.

The CPU 3 analyzes the received D1 and
The control data is transmitted to the CPU 2 via 3. CPU2
Changes the display on the display based on the transmitted information. The DC-DC converter DD is a PBX.
+ 5V required for PCB by power supply (usually 48V)
Output P, -5VP. The power supply POW of the personal computer body converts AC100V and supplies + 5V and -5V to the CPU2.

FIG. 4 shows an image of a dedicated telephone on the display of a personal computer as an example of use. In the figure, 31
Is the display screen, 32 is the image screen of the dedicated telephone,
33 is a display on the telephone, 34 is keys, 35 is a numeric keypad, and 36 is a mouse. Reference numeral 33 shows a screen equivalent to that of the liquid crystal display panel of the dedicated telephone, and keys show key display such as transfer, hold, recall and speaker.

Mouse these 36 icons on the personal computer
If you select with, you can perform the same operations as with an ordinary dedicated telephone. The display display 33 displays the telephone number and the call duration of the other party as in the case of the dedicated telephone. Here, since the personal computer does not have a handset unit for a dedicated telephone, the dedicated telephone 15 is used to talk to the other party during a call.

An operation example at the time of making a call will be shown. In parentheses, an operation example of an ordinary dedicated telephone is shown. (1) When making a call, raise the handset of the telephone. (Raise the handset with the dedicated phone) (2) Click the other party's phone number with the mouse 36 using the numeric keypad 35 on the display. (Press the numeric keypad of the other party's telephone number on the dedicated phone) (3) Check the other party's telephone number on the display 33.
(Check the other party's phone number on the LCD of the special phone) (4) When the other party answers, talk on the special phone. (Call) (5) At the end of the call, hang up the handset. (Place the handset of the dedicated telephone) For an operation example when receiving a call, (11) The speaker of the personal computer sounds. (The speaker of the dedicated telephone rings) (12) A call display appears on the display 33. (Call display on the LCD of the dedicated telephone) (13) Lift the handset. (Raise the handset of the dedicated telephone) (14) Call (call) When the power of the personal computer is off, the PBR25 does not receive dial information from the personal computer, so the telephone 15 outputs a PB signal, which the PBR25 receives and sends to the CPU23. It is for sending. When an incoming call arrives, SD28 sounds and notifies the incoming call in place of the PC speaker.

Conventionally, the DD 26 has been used as a power source as a method of supplying power to the dedicated telephone set 15. Since the CODEC 27 normally requires ± 5V, the power supply to the dedicated telephone 15 also uses this voltage. The problem here is the power supplied to the dedicated telephone.

[0012]

A current of at least 30 mA is required for stable operation of a general telephone. When the electric power at this time is calculated by ± 5V, 5 × 0.03 × 2 =
It is 0.3W. The power consumption including the line of the dedicated telephone is
Since the power consumption is about 0.6W, controlling the telephone with a personal computer in this way increases the power consumption by about 50%. If this PCB is installed in a PBX that does not consider this increase in power, the number of telephones that can be accommodated must be reduced. There was a problem that it had to be.

Further, in the case of a PBX to be developed in the future, there is a problem that the power supply capacity of the PBX must be increased and the cost will increase. In order to solve this, there is a plan to supply power to the PCB from the personal computer side, but this has a demerit that the telephone cannot be used when the personal computer is first turned off.

Further, in this case, if all the people turn off the power of the personal computer when leaving the company, the PBX side may consider it as a fault of the telephone, and the system may be down due to a large amount of fault handling. In other words, power supply from the PBX is essential to use the functions of the telephone even when the power of the personal computer is turned off.

Next, when the ringer generator (RGN) 29 is added to the personal computer expansion board (PCB), the ringer (AC80V, 25Hz) is sent to the dedicated telephone. In the conventional example of FIG. 3, the speaker of the personal computer rang when an incoming call arrived, but in the case of this example, a ringer is sent to ring the telephone.

The power consumption of the RGN is about 1 W when the telephone rings.
Is. However, ringer ringing is very rare,
Considering the power consumption of the PBX as a whole, it is equivalent to the case where the telephone is used, that is, the power consumption is 1 W, but since the frequency is 1/3, it is about 0.3 W, which is equivalent to using the telephone. Therefore, when ringing the ringer of the telephone, the same problem as described above occurs.

[0017]

FIG. 1 is a block diagram showing the principle of the present invention. 1A shows a power supply switching means for the telephone, and FIG. 1B shows a ringer switching means for the telephone.
In the figure, 1 is a personal computer main body, 2 is a personal computer expansion board, 3 is a personal computer power supply section, 4 is a DC converter, 5 is a power supply circuit, 6 is a ringer circuit, 7 is a power supply changeover switch, 8
Is a ringer changeover switch, 9 is a ringer sending switch,
10 indicates a dedicated telephone.

The power supply switching means for the telephone shown in FIG.
This is a circuit for selecting either the DC converter 4 or the personal computer power supply unit 3 to supply power to the telephone. By the operation of the power supply changeover switch 7, the personal computer power supply unit 3 supplies current to the dedicated telephone 10 when the personal computer is on, and the DC converter 4 supplies current when the personal computer power is off. .

The ringer switching means for the telephone shown in FIG. 1 (b) is a circuit for selecting one of the DC converter 4 and the personal computer power supply unit 5 for supplying power to the ringer circuit 6. The operation of the ringer changeover switch 8 switches the current supply from the personal computer power supply 5 to the ringer circuit 6 when the power supply of the personal computer is on, and to the current supply from the DC converter 4 when the power supply of the personal computer is turned off.

[0020]

According to the present invention, when the personal computer is turned off and a large number of handsets are simultaneously used to use the telephone, the same problem as before occurs, but the personal computer is usually turned off when leaving the office. Since there is no such situation, it is considered that there is no practical problem. Therefore, the changeover switch is switched by turning on / off the power of the personal computer, so that the power can be supplied from the personal computer side when the personal computer is turned on and the power can be supplied from the PBX side when the personal computer is turned off.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows an embodiment of a configuration diagram of a power supply switching circuit for a personal computer expansion board of the present invention. The figure shows an embodiment in which both power supply to the telephone and ringer transmission are switched. In this embodiment, a power source switching relay RL circuit is added to the conventional circuit.

In the figure, 11 is a PBX, 12 is a personal computer main body, 13 is a personal computer expansion board (PCB), 14 is a general telephone (TEL1), and 15 is a personal computer telephone (TEL).
2) and 16 are PBX dedicated telephone interface (IN
F1), 17 is a PBX switch (SW), 18 is a central control unit (CPU1) of the PBX, 19 is a power supply unit (POW) of the personal computer main body, 20 is a central control unit (CPU) of the personal computer main body
2) is shown.

In the personal computer expansion board (PCB) 13, 21 is an interface (INF2) with the PBX, 22
Is an interface with a personal computer (INF3), 23 is a central control unit (CPU3), 24 is a power supply circuit (BF) to a dedicated telephone, and 25 is a PB signal receiver (PB) from the dedicated telephone.
R), 26 is a DC converter (DD) from PBX, 27 is a coder / decoder (CODEC), 28 is a sounder, 29
Is a ringer circuit (RGN), and 30 is a power source switching relay circuit (RL).

In the power source switching relay circuit 30,
The coil of the RL relay is driven by the + 5V power supply of the personal computer. When the power supply of the personal computer is on, the contact rl of the RL relay is connected to the B1 and B2 sides, and the RGN and BF are powered by + 5V and -5V of the personal computer. It On the other hand, when the power supply of the personal computer is off, the contact rl of the RL relay is connected to the A1 and A2 sides and power is supplied from DD.

As a result, when the power of the personal computer is on, B
Power is supplied to F and RGN from the personal computer side,
The PBX supplies only the same power as an ordinary dedicated telephone, and the power consumption of the PBX does not increase. When the power of the personal computer is off, PBX is used for BF and RGN.
Powered by, the phone and ringer are ready for use. Therefore, both outgoing and incoming calls can be used even when the computer is powered off.

[0026]

According to the present invention, the power supply to the telephone and the power supply to the ringer generator are performed from the personal computer while the personal computer is powered on, so that the load on the PBX does not increase and the number of terminals is not reduced. There is a merit that you can install a personal computer phone.

[Brief description of drawings]

FIG. 1 is a block diagram of the principle of the present invention.

[Fig. 2] Example of a PC expansion board power supply switching circuit configuration diagram

[Fig. 3] Example of connection configuration between a conventional personal computer body and PBX

[Figure 4] Image of a dedicated telephone on the display of a personal computer

[Explanation of symbols]

 1,12 Personal computer main body 2,13 Personal computer expansion board 3 Personal computer power supply section 4 DC converter 5,24 Power feeding circuit 6,29 Ringer circuit 7 Power feeding switch 8 Ringer switching switch 9 Ringer sending switch 10 Private telephone 11 PBX 14 General telephone 15 Personal computer Dedicated telephone 16 PBX dedicated telephone interface 17 PBX switch 18 PBX central control unit 19 Personal computer power supply unit 20 Personal computer main control unit 21 Personal computer main control unit 21 PBX interface 22 Personal computer interface 23 Central control unit 25 Central control unit 25 PB signal receiver 26 DC converter 27 Coder / Decoder 28 Sounder 30 Power source switching relay circuit 31 Display screen 32 Image screen of dedicated telephone 33 Display display of telephone 34 Keys 35 Numeric keypad 36 Mouse

Claims (5)

[Claims] 1. A personal computer expansion board that is housed in a personal computer main body as a PBX dedicated terminal and is connected to a personal telephone, the control part of the personal computer expansion board being operated by power supply from the PBX, In a personal computer device capable of using a dedicated telephone connected to the personal computer extension board regardless of whether it is on or off, the personal computer extension board is switched between the power source from the PBX side and the power source from the personal computer body and supplied to a power supply circuit. A power supply method for a personal computer expansion board, characterized in that a power supply switching means is provided to supply power to the telephone with the power of the personal computer when the power of the personal computer is turned on, and to supply power to the telephone with the power source from the PBX when the personal computer is turned off. 2. In the personal computer device, the personal computer expansion board is provided with ringer switching means for switching the power from the PBX side and the power source from the personal computer main body to the ringer circuit, and the personal computer power is supplied when the personal computer is powered on. A power supply method for a personal computer expansion board, characterized in that a ringer voltage is generated to send the ringer to the telephone, and when the power of the personal computer is turned off, the ringer voltage is generated from the PBX to send the ringer to the telephone. 3. In the personal computer device, when the personal computer is turned on, power is supplied to the telephone from the personal computer, and when the personal computer power is turned off, the ringer voltage is generated by the power source from the PBX to send the ringer to the telephone. The power supply method for a personal computer expansion board according to claim 1, wherein the power is supplied from the PBX to the telephone and the ringer voltage is generated to send the ringer to the telephone. 4. In the personal computer device, when the personal computer is powered on, power is supplied from the PBX to the telephone, and the personal computer power supplies a ringer voltage to send the ringer to the telephone to power off the personal computer. 3. The power supply method for a personal computer expansion board according to claim 2, wherein the power is supplied from the PBX to the telephone, and the ringer voltage is generated to send the ringer to the telephone. 5. In the personal computer device, when the personal computer is powered on, power is supplied from the personal computer to the telephone, and the personal computer power supplies a ringer voltage to send the ringer to the personal computer to turn off the personal computer. 3. The power supply method for a personal computer expansion board according to claim 1, wherein the power is supplied from the PBX to the telephone, and a ringer voltage is generated to send the ringer to the telephone.