WO2001097493A1

WO2001097493A1 - Control system used for telephone distributing frame and/or circuit switch box

Info

Publication number: WO2001097493A1
Application number: PCT/CN2001/000925
Authority: WO
Inventors: Guang Xu; Tommy Chong; Yan Lam
Original assignee: Guang Xu; Tommy Chong; Yan Lam
Priority date: 2000-06-08
Filing date: 2001-06-08
Publication date: 2001-12-20
Also published as: AU2001272316A1; CN1187946C; CN1419775A

Abstract

A control system used for telephone distributing frame and/or circuit switch box is disclosed. The control system comprises: one bus, a plurality of exchange interface circuits, to which voice A/D converter, voice D/A converter and I/O controller are connected, a plurality of telephone interface circuits, to which voice A/D converter, voice D/A converter, off-hook A/D converter and I/O controller are connected, and one processor which is connected to the bus and controls operation of those A/D, D/A connection between a particular up-connected port and a particular down-connected port via said bus. So automatic and remote control of the telephone distributing frame is achieved, manual cost is reduced, and performance of the distributing frame and/or circuit switch box is improved to be more effective and reliable.

Description

Control system for telephone distribution frame and / or line transfer box

The present invention relates to the technical field of wired communications, and in particular, to a control system for a telephone distribution frame and / or a line transfer box. Background technique

A telephone line distribution box or distribution frame (MDF) is a type of telephone line connection device that is used to eventually connect telephone exchanges and subscriber telephones and is widely used in the public telephone switching network (PTSN). At present, the control of the line connection in the distribution frame is performed by means of manual jumpers and manual maintenance.

Chinese utility model patent CN2288561Y discloses a distribution frame, which belongs to such a manually controlled distribution frame.

Because the public telephone exchange network is widely distributed, large in scale, complicated in connection, and the phone users are constantly changing, the workload of maintaining the distribution box is very large. Depending on manual field operations, the cost is high, the efficiency is low, and the response is slow. Knowing the connection status of each telephone line in real time cannot meet the rapidly increasing demand for telephone communication. In addition, since most telephone line transfer boxes are installed at high places, it is dangerous to manually connect wires. Summary of invention

The purpose of the present invention is to solve the above problems of the existing telephone distribution frames and distribution boxes.

To this end, the present invention provides a control system for a telephone distribution frame or a distribution box. The system includes a plurality of uplink port pairs connected to a telephone switchboard and a plurality of downlink port pairs connected to a user telephone. A processor, a bus, multiple A / D converters and multiple D / A converters, wherein the processor, A / D converter and D / A converter are connected through the bus; multiple telephones An interface circuit, each telephone interface circuit is respectively connected to a pair of the downlink port pair, one of the A / D converter and one of the D / A converter, and The user phone and the A / D converter, D / A converter transmit signals and implement echo cancellation to mix the received and transmitted signals; multiple switch interfaces Each switch interface circuit is connected to a pair of the uplink port pair, one of the A / D converter, and one of the D / A converter, respectively, for The switch and the A / D converter and the D / A converter transmit signals and implement echo cancellation to mix the received and transmitted signals; multiple I / 0 controllers are connected to the bus, and the multiple telephones The interface circuit and the plurality of switch interface circuits are respectively connected to the plurality of I / 0 controllers. BRIEF DESCRIPTION OF THE DRAWINGS

By describing the preferred embodiments of the present invention with reference to the accompanying drawings, the advantages and beneficial effects of the control system for a telephone distribution frame or a distribution box of the present invention will be easier to understand, wherein: FIG. 1 is a wiring of the prior art Schematic diagram of rack or distribution box;

2 is a schematic block diagram of a telephone distribution box control system according to an embodiment of the present invention;

3 is a flowchart of the work of a telephone distribution box control system for off-hook of a telephone according to an embodiment of the present invention;

4 is a flowchart of the operation of a telephone distribution box control system for a ringing signal sent from a switch according to an embodiment of the present invention;

5 is a block diagram of a switch interface circuit in a telephone distribution box control system according to an embodiment of the present invention;

6 is a block diagram of a telephone interface circuit in a telephone distribution box control system according to an embodiment of the present invention;

FIG. Ί is a specific circuit diagram of a switch interface circuit in a telephone distribution box control system according to an embodiment of the present invention;

8 is a specific circuit diagram of a telephone interface circuit in a telephone distribution box control system according to an embodiment of the present invention;

FIG. 9 is an example of a table of wiring connection related information stored on a storage device according to an embodiment of the present invention.

Detailed description of the invention FIG. 1 is a schematic diagram of a prior art distribution frame or a distribution box. The upper connection port and the lower connection port of the distribution frame or the distribution box are manually connected through jumpers, so as to connect the telephone exchange with a specific user's telephone.

Fig. 2 is a schematic block diagram of a telephone distribution box control system according to an embodiment of the present invention. As shown in the figure, there are multiple uplink port pairs (1 to n) connected to the switch. Each uplink port pair is also connected to switch interface circuits 1 to n respectively, that is, uplink port pair 1 is connected to switch interface circuit 1, uplink port pair 2 is connected to switch interface circuit 2, and so on. Port pair n is connected to the switch interface circuit n. Each switch interface circuit is connected to a voice A / D converter, a voice D / A converter, and an I / O controller respectively, and is used to switch between the switch and the voice A / D converter and the voice D The A / A converter transmits signals and implements echo cancellation to mix the received and transmitted signals, and transmits the off-hook signal from the I / O controller to the switch. The above-mentioned voice A / D converter, voice D / A converter, and I / O controller are each connected to a bus.

As shown in FIG. 2, there are a plurality of downlink port pairs (1 to m) respectively connected to the user's telephone. Each downlink port pair is also connected to the telephone interface circuit 1 to m respectively, that is: the downlink port pair 1 is connected to the telephone interface circuit 1, the downlink port pair 2 is connected to the telephone interface circuit 2, and so on. The port pair m is connected to the telephone interface circuit m. Each telephone interface circuit is connected to a voice A / D converter, a voice D / A converter, an off-hook A / D converter, and an I / O controller, respectively. The signal is transmitted between the A / D converter and the voice D / A converter and echo cancellation is performed to mix the received and transmitted signals, and the switch ringing signal from the I / O controller is transmitted to the telephone, and the telephone The off-hook and on-hook signals are transmitted to the off-hook A / D converter. The above-mentioned voice A / D converter, voice D / A converter, I / O controller, and off-hook A / D converter are all connected to the above bus, respectively.

As shown in Figure 2, there is also a processor and a storage device connected to the bus. Corresponding information of the uplink port pair and the downlink port pair is stored in the storage device. The processor controls the work of those A / D, D / A converters, and I / O controllers through a bus, so as to achieve the establishment of voice between the specific uplink port pair and the specific downlink port pair through the bus. Signal connection.

The working principle of the present invention is described in detail below with reference to FIGS. 3 and 4. FIG. 3 is an embodiment of the present invention, for the telephone off-hook, the telephone distribution box control system works Flowchart. When the user's phone goes off-hook (step 300), the off-hook signal first reaches the downstream port pair connected to the phone. Here it is assumed that the downstream port pair 1. In step 301, the downstream port pair 1 is connected. The telephone interface circuit 1 will pass the signal to the off-hook A / D converter connected to it; the off-hook A / D converter performs analog / digital conversion on the signal, and the digital signal is transmitted to the processor through the bus. At step 302 The processor receives the off-hook signal from the off-hook A / D converter, and first determines which signal is sent from the downstream port pair based on the port number of the off-hook A / D converter. Here is Downlink port pair 1. Then, the processor determines which uplink port pair corresponding to the downlink port pair is (this is assumed to be uplink port pair 1), and the switch interface circuit, voice A / D, D / A converter and I / O controller. At step 303, the processor sends an off-hook signal to the switch through the I / O controller connected to the switch interface circuit. Then, at step 303, the dial tone or voice signal from the next port pair 1 passes through the telephone interface circuit. 1 is transmitted to the voice A / D converter connected to it, the converted digital signal is transmitted to the bus, and under the control of the processor, it is transmitted to the voice D / A converter connected to the switch interface circuit 1 and converted into analog The signal is sent to the uplink port pair 1 through the switch interface circuit; at the same time, the voice signal transmitted from the uplink port pair 1 is passed through the switch interface circuit 1 to the connected voice A / D converter, and the converted digital signal is transmitted To the bus, under the control of the processor, and then to the voice D / A converter connected to the telephone interface circuit 1, converted into an analog signal, and sent to the downstream port pair 1 through the telephone interface circuit, thereby forming the downstream port Dial tone or voice connection between pair 1 and uplink port pair 1. Next, in step 305, the processor continuously detects the signal of the off-hook A / D converter to determine whether the phone is on-hook. If there is no on-hook signal, the processor continues to maintain the voice connection; otherwise, if the on-hook signal is received, the processor controls The I / O controller connected to the switch interface circuit 1 sends an on-hook signal to the switch, and ends the voice connection in step 307.

FIG. 4 is a flowchart of the operation of a telephone distribution box control system for a ringing signal sent by a switch according to an embodiment of the present invention. When a ringing signal is sent from a switch (step 400), the ringing signal first reaches the switch A connected uplink port pair is assumed to be uplink port pair 1. At step 401, the switch interface circuit 1 connected to uplink port pair 1 will pass the signal to the voice A / D converter connected to it; The voice A / D converter performs analog / digital conversion on the signal, and the digital signal is transmitted to the processor through the bus. In step 402, the processor receives the ringing signal sent by the voice A / D converter, and firstly, according to the terminal of the voice A / D converter, Slogan, it is determined that the signal is from the uplink port pair, here is the uplink port pair 1. Then, the processor determines which downlink port pair corresponding to the uplink port pair is (this is assumed to be the downlink port pair 1), and the telephone interface circuit, voice A / D, D / A converter and I / O controller. In step 403, the processor sends a ringing signal to the telephone through the I / O controller connected to the telephone interface circuit. In step 304, the processor determines whether the phone that is sent the ring signal is off-hook. This is achieved by determining whether an off-hook signal is transmitted from the off-hook A / D converter connected to the telephone interface circuit 1. If the phone is off-hook, proceed to step 300 in FIG. 3 to achieve a voice connection. If the phone is not off-hook, proceed to step 305, the processor determines whether the switch continues to send a ringing signal. Whether the ringing signal is transmitted from the voice A / D converter connected to the switch interface circuit 1 is implemented. If the determination result of step 305 is yes, then continue to step 401; otherwise, the processor stops ringing to the phone at step 306.

Fig. 5 is a block diagram of a switch interface circuit in a telephone distribution box control system according to an embodiment of the present invention. The switch interface circuit shown in the figure is composed of a balanced bridge, an amplifier circuit, and a circuit that transfers the state of the telephone set, so as to realize the transmission of signals between the switch and the voice A / D converter and the voice D / A converter connected to it. And realize echo cancellation to mix the received and transmitted signals, and transfer the off-hook signal from the I / O controller to the switch.

Fig. 6 is a block diagram of a telephone interface circuit in a telephone distribution box control system according to an embodiment of the present invention. The telephone interface circuit shown in the figure is composed of an amplifier circuit, a balanced bridge, a circuit that transmits the state of the telephone, a ringing circuit, and a telephone feed circuit, so that the telephone and voice A / D converter connected to it, The signals are transmitted between the voice D / A converters and echo cancellation is performed to mix the received and transmitted signals, and the switch ringing signal from the I / O controller is transmitted to the telephone, and the telephone is off-hook and on-hook. Give the off-hook A / D converter.

FIG. 7 is a specific circuit diagram of a switch interface circuit in a telephone distribution box control system according to an embodiment of the present invention.

FIG. 8 is a specific circuit diagram of a telephone interface circuit in a telephone distribution box control system according to an embodiment of the present invention.

According to an embodiment of the present invention, there is another storage device connected to the bus. The storage device stores information related to wiring connections including a correspondence relationship between the uplink port and the downlink port. FIG. 9 shows a configuration stored on a storage device according to an embodiment of the present invention. An example of a table connected by lines of information. In the working process of the telephone distribution frame control system of the present invention, the processor establishes a voice connection according to the correspondence relationship recorded in the table. Specifically, in steps 302, 303, 402, and 403, the processor determines the corresponding A / D, D / A converter port number, I / O controller port number, and uplink and downlink by querying the table. The port is numbered; by changing the information in this table, you can change the connection result in the patch panel.

According to another embodiment of the present invention, there is also a network interface circuit connected to the bus. The network interface circuit can remotely access the connection information table stored in the storage device, thereby implementing remote control.

The A / D and D / A converters used in the embodiments of the present invention may be, for example, Advantech's PCL-813B data acquisition card and PCL-727 analog output card in the prior art. The I / O controller used in the embodiment of the present invention may be, for example, a PCL-720 I / O control card of Advantech Co., Ltd. equipped with PCLD-785B in the prior art. The processor, the bus, and the memory used in the embodiment of the present invention may be an IPC610 PP1550 industrial control computer such as Advantech in the prior art. Of course, these devices can also use other manufacturers and other models or develop from scratch.

Although the above description of the present invention has been made through specific embodiments, those skilled in the art should understand that there are many other changes without departing from the spirit of the present invention. Industrial applicability

It can be seen from the above detailed description of the present invention that the control system for a telephone distribution frame and / or a line transfer box of the present invention can realize automatic control of the telephone distribution frame and / or remote control, thereby reducing labor Cost, improving the performance of the distribution frame and / or line junction box makes it more efficient and reliable. At the same time, multiple patch panels or line transfer boxes to which the control system of the present invention is applied can be connected to each other to automatically detect the working status of the telephone line, and use its automatic line function to automatically restore calls to the faulty line.

Claims

Rights request

1. A control system for a telephone distribution frame and / or a line transfer box, the system comprising a plurality of uplink port pairs connected to a telephone exchange and a plurality of downlink port pairs connected to a subscriber telephone, characterized in that Also includes:

A bus

Multiple switch interface circuits, and each of the uplink port pairs is correspondingly connected to one of the switch interface circuits; each switch interface circuit is respectively connected to a voice A / D converter, a voice D / A converter, and An I / O controller is connected to transmit signals between the switch connected to it and the voice A / D converter and the voice D / A converter and implement echo cancellation to mix the received and transmitted signals and connect them The off-hook signal from the I / O controller is transmitted to the switch; the voice A / D converter, voice D / A converter, and I / O controller are all connected to the bus;

Multiple telephone interface circuits, and each of the downlink port pairs is correspondingly connected to one of the telephone interface circuits; each telephone interface circuit is respectively connected with a voice A / D converter, a voice D / A converter, and a The off-hook A / D converter is connected to an I / O controller. It is used to transmit signals between the telephone and voice A / D converter and voice D / A converter connected to it and implement echo cancellation. Send the signals to be mixed, and send the switch ringing signal from the I / O controller connected to the phone to the off-hook and on-hook signals to the off-hook A / D converter connected to the phone; The above-mentioned voice A / D converter, voice D / A converter, I / O controller and off-hook A / D converter are all connected to the above bus respectively;

A processor is connected to the above-mentioned bus, and controls the operations of those A / D, D / A converters, and I / O controllers through the above-mentioned bus, so as to achieve between a specific uplink port pair and a specific downlink port pair, A voice signal connection is established through the bus.

2. The system according to claim 1, wherein the telephone interface circuit is a hybrid circuit composed of a combination of a bridge and an operational amplifier.

3. The system according to claim 1, wherein the switch interface circuit is a hybrid circuit composed of a combination of an electric bridge and an operational amplifier.

4. The system according to any one of the preceding claims, further comprising a storage device for storing the A / D, D / A converter, the port number of the device, the port number of the I / O controller, and the uplink and downlink. Information about the corresponding relationship between the port pair numbers; the processor controls the establishment of a voice connection according to the information of the corresponding relationship.

5. The system according to claim 5, further comprising a network interface circuit connected to the bus so that the storage device can be remotely accessed.