JP3001415B2 - PC communication support adapter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a personal computer communication support adapter capable of connecting to an external line by an auto dial in a PBX line when performing personal computer communication.

[0002]

2. Description of the Related Art Conventionally, when performing this type of personal computer communication (including facsimile communication), an outside line transmission number is transmitted to a PBX as a dial signal, and after a dial tone from the PBX is detected, a normal operation is performed. Requires a method of transmitting the destination dial number as a dial signal, but when personal computer communication is not possible, it has been troublesome due to temporary line connection construction and the like.

[0003]

As described above, conventionally,
When using personal computer communication, available places were limited. However, recently, I brought my personal computer to a hotel,
The number of cases where personal computers are communicated with companies is increasing. However, if an attempt is made to communicate using the auto dial registered in the personal computer, the extension dial tone (intermittent two-tone) is rejected because it differs from the public line dial tone. This is because PC
When used as a BX extension device, external line transmission first sends the external line transmission number as a dial signal as described above,
It is necessary to confirm that the dial tone from X has been returned, and then transmit the dial number of the other party as a dial signal. In addition, a person who cannot change the registration of the auto dial by himself cannot perform personal computer communication with an outside line. Therefore, a subscriber line as a temporary line is to be installed in the room, but it takes a lot of trouble, cannot respond immediately, and cannot receive the service by the PBX.
There is a problem that the collection of the line usage fee is hindered.

[0004] The present invention has been made in view of such a point, does not require the change of the registered auto dial, the installation of a subscriber line as a temporary line in the room,
It is an object of the present invention to provide a personal computer communication support adapter which can receive service by a PBX and can access an outside line and can be easily installed.

[0005]

Normally, in an auto-dial of a personal computer or the like, an external line transmission access code from a PBX extension is not set. Therefore, when a communication loop is established between the PBX and the personal computer due to off-hook from the personal computer, an outside line transmission number (for example, 0 transmission) is transmitted to the PBX as a dial signal. This allows the PC to
Communication with an outside line can be performed via the BX line.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS To achieve the above object, a personal computer communication support adapter according to the present invention detects a loop formation due to an off-hook from a personal computer and uses the loop detection circuit for connection with a PBX, a personal computer and a dial signal. A communication path control circuit for switching a generation circuit, a dial signal generation circuit for generating an outside line transmission number, a reception detection circuit for detecting an incoming call, and a sequence control circuit for adjusting the operation timing of each circuit; It is characterized in that an outside line transmission number is sent out as a dial signal before an outside line destination number is sent out as a dial signal by the automatic dialing.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a circuit configuration of a personal computer communication support adapter. In the figure, a personal computer communication support adapter 1 is a personal computer 10 (including a communication modem).
A loop detection circuit 2 for detecting a loop with the PBX formed by off-hook from the telephone, a communication path control circuit 3 for controlling the connection between the personal computer 10 and the communication line 8, a dial signal generation circuit for generating an outside line transmission number 4, an incoming call detection circuit 6 for detecting an incoming call from the communication line 8, a communication line control circuit 3, and a sequence control circuit 7 for adjusting the operation timing of each circuit such as the dial signal generation circuit 4. The personal computer communication support adapter 1 has a PBX1
1 and a telephone line 8 connected to an extension telephone 9 are connected.

Next, the operation of the personal computer communication support adapter 1 will be described. When the loop detection circuit 2 detects that a loop with the PBX 11 has been formed by sending an off-hook from the personal computer 10 (including a communication modem), the loop detection circuit 2 sends a detection signal to the sequence control circuit 7. I do. The sequence control circuit 7 sends a start signal at the timing of the dial signal generation circuit and the communication path control circuit. The communication path control circuit 3 is temporarily connected to the personal computer 10 and the communication line 8.
Is turned off, and the dial signal generation circuit 4 and the communication line 8 are connected. The dial signal generation circuit 4 generates an outside line transmission number (for example, 0) and sends it to the PBX 11 as a dial signal. The communication path control circuit 3 turns on the connection between the personal computer 10 and the communication line 8 and turns on the dial signal generation circuit 4 and the communication line 8.
Disconnect. By the above sequence control (1), the dial signal generating circuit 4 generates an outside line transmission number and sends it to the PBX 11 as a dial signal. Subsequently, the personal computer 10 sends out the dialing number of the external line as a dial signal using a normal automatic dial, so that the personal computer 10 can communicate with the external line.

When the incoming call detection circuit 6 detects an incoming call from an outside line or an extension, the incoming call detection circuit 6 sends a detection signal to the sequence control circuit 7. The sequence control circuit 7 is controlled by the detection signal so that the communication path control circuit 3 and the dial signal generation circuit 4 do not operate. Therefore, the dial signal generation circuit 4 operates when an incoming call is received from an outside line or an extension, and the outside line transmission number is not sent to the PBX 11 as a dial signal.

FIG. 2 is a schematic explanatory diagram of a personal computer communication system for using the personal computer communication support adapter. In the figure, a subscriber line 12 is connected to a central office circuit and a communication line 8 is connected to an extension circuit of the PBX 11. A communication line 8, a personal computer 10, and an extension telephone 9 are connected to the personal computer communication support adapter 1.

[0011]

As described above, the personal computer communication support adapter according to the present invention includes a loop detecting circuit for detecting the formation of a loop due to off-hook from a personal computer, and a dial signal generating circuit for generating an outside line calling number. A communication path control circuit for switching between a personal computer and a dial signal generating circuit is provided so that an external line calling number can be added as a dial signal before the external dial number of the external line is transmitted as a dial signal by the automatic dial of the personal computer. Therefore, a personal computer in the PBX premises can easily access an outside line with a normal automatic dial.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a circuit configuration of a personal computer communication support adapter according to an embodiment of the present invention.

FIG. 2 is a schematic explanatory diagram of a personal computer communication system for using the personal computer communication support adapter according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Personal computer communication support adapter 2 Loop detection circuit 3 Communication path control circuit 4 Dial signal generation circuit 6 Incoming call detection circuit 7 Sequence control circuit 8 Communication line 9 Extension telephone 10 Personal computer (including modem) 11 PBX 12 Subscriber line

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 11/00 303 G06F 13/00 353

Claims (1)

(57) [Claims] The communication support adapter includes a loop detection circuit used to detect a loop formed by off-hook from a personal computer and used for connection to a PBX, and a dial signal generating circuit for generating an outside line transmission number. A communication path control circuit for switching a dial signal generation circuit is provided. An incoming call detection circuit for detecting an incoming call from the PBX, and a sequence control circuit for adjusting the operation timing of each circuit are provided. A communication support adapter for automatically connecting to an outside line via a line.