JPH04364640A - Intra-station line terminator - Google Patents

Abstract

PURPOSE:To set the communication speed automatically and to implement remote control by detecting the transmission speed at the intra-station line terminator and selecting the transmission speed automatically based on transmission speed information at a subscriber's data terminal equipment side. CONSTITUTION:A detection circuit 52 in a control section 6 detects a transmission speed in the station based on a transmission data and a transmission clock received from an in-station equipment interface 3 and sends the result to a control section 54. The control section 54 sends the transmission speed information together with transmission timing information in the transmission timing of the subscriber data terminal equipment side. Simultaneously, the control section 54 is connected to a selection circuit 9 via a selector 55. On the other hand, a reception data from the subscriber data terminal equipment is transferred to the transmission speed monitor control section 6 by giving a prescribed reception timing to a reception section 14. The control section 54 detects the transmission speed information from the reception data and when the information is coincident with the transmission speed information selected by the selection circuit 9, the connection of the selector 55 is switched and a clock generator 40 is simultaneously controlled.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-office line termination device.

0002

2. Description of the Related Art Conventionally, when transmitting and receiving signals from a terminal to an in-office device through digital data transmission, an in-office line terminating device is used in opposition to an in-house data line terminating device. In order to establish communication between the in-home data line terminating device and the in-office line terminating device, the installer operates a communication speed setting switch in accordance with the communication speed of the terminal device.

0003

[Problem to be Solved by the Invention] With this conventional in-office line termination device, the communication speed is determined by different installers because the in-house data line termination device and the in-office line termination device are usually installed in separate locations. Set. Therefore, setting errors due to mutual misunderstandings are likely to occur, and in such cases, there is a problem in that not only communication cannot be performed, but also it is difficult to investigate the cause.

Another problem is that the communication speed cannot be controlled remotely.

SUMMARY OF THE INVENTION An object of the present invention is to provide an in-office line termination device that can automatically set the communication speed, and also to enable remote control from an in-office device monitoring and control device.

[0006]

[Means for Solving the Problems] An in-office line termination device of the present invention includes a first interface section that is connected to a device for remote monitoring and control of an in-office device and detects input transmission speed information, and a a second interface unit that is connected to perform data transmission; a first detection circuit that detects the transmission speed of the in-office device in response to transmission data and a transmission clock received via the second interface unit; a selection circuit that selects one of the transmission speed information detected by the first interface unit and the first detection circuit; and a selection circuit that sends the transmission speed information selected by the selection circuit to the home data terminal side together with the transmission data. a second detection circuit that detects the transmission speed of the received data in response to the received data and the reception clock from the in-home data terminal side; and a second detection circuit that detects the transmission speed of the received data in response to the transmission speed information of the received data; and a gate circuit for sending the received data to the second interface section.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. The in-office device side interface section 3 is connected to a transmission speed monitoring control section 6 via transmission and reception signal lines 5 and 4. The transmission speed monitoring control unit 6 detects the transmission speed of the in-office device from the transmission signal line 5 and sends the transmission speed information to the selection circuit 9 via the signal line 7. Furthermore, transmission speed information input from the monitoring and control device for in-office equipment is sent to the remote control device side interface 2 via the signal line 1. The remote control device side interface 2 detects this transmission speed and sends it to the selection circuit 9 via the signal line 8. The selection circuit 9 selects the transmission speed information of the signal line 7 when there is an input to the signal line 7 according to the information given from the signal lines 7 and 8, and selects the transmission speed information of the signal line 8 at other times. It is sent to the transmitter 11. The transmitter 11 transmits transmission speed information to the in-home data terminal via the transmission line 12.

On the other hand, data transmitted from the home data terminal side is received by the receiving section 14 via the receiving line 13 and transmitted to the transmission speed monitoring control section 6 via the signal line 15. The transmission rate monitoring control unit 6 detects the transmission rate from this transmission data and switches the transmission rate based on the above-mentioned transmission rate information. Thereafter, when synchronization with the in-home data terminal side is established, the transmission speed monitoring control section 6 sends out the received data and the received clock via the reception signal line 4.

FIG. 2 shows an example of the configuration of the transmission rate monitoring and control section 6. The transmission speed detection circuit 52 detects the transmission speed inside the office using the transmission data and the transmission clock received from the internal device side interface 3 via the signal line 5, and sends it to the control unit 54 via the signal line 53. When the control unit 54 receives the transmission speed information inside the office, it transmits the transmission speed information together with the transmission timing information via the signal lines 56 and 57 at a predetermined transmission timing on the home data terminal side. At the same time, the control unit 54 connects the selector 55 to the signal line 56.
and 57, and as a result, it is connected to the selection circuit 9 via the signal line 7.

On the other hand, the received data from the in-home data terminal side is transmitted to the receiving unit 14 via the signal line 41 at a predetermined reception timing, which is controlled by the control unit 54 to the clock generator 40 via the signal line 43 and transmitted. The data is transferred to the transmission speed monitoring control section 6 by giving the data to the transmission speed monitoring control section 6. This receiving section 14
The received data and the received clock are input to the control unit 54 via the signal line 15. The control unit 54 detects transmission speed information from the received data, and if this information matches the transmission speed information selected by the selection circuit 9 in the previously transmitted information, the control unit 54 connects the selector 55 to the signal line. At the same time, the clock generator 40 is controlled so as to select the transmission data and transmission clock of No. 5, and at the same time, transmit a clock that can be synchronized on the data terminal side. After that, when synchronization with the in-home data terminal side is established, the control unit 54 sends an enable signal to the signal line 44 to enable the gate 45, and transmits the received data and data to the in-house device side interface 3 via the signal line 4. Sends the receive clock.

0012

[Effects of the Invention] As explained above, according to the present invention, the transmission speed on the in-house line termination equipment side is detected and notified to the in-home data terminal side, and the transmission speed is automatically detected based on the transmission speed information on the in-home data terminal side. By switching the transmission speed, it is possible to automatically set the transmission speed between the in-office line termination equipment installed at a remote location and the home data terminal equipment, thereby preventing communication failures caused by human error. It can be prevented.

Furthermore, by providing an interface section with a remote control device, operations can be performed from a remote location.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration example of a transmission rate monitoring control section 6 in FIG. 1.

[Explanation of symbols]

1, 4, 5, 7, 8, 10, 12, 13, 15, 41,
43, 44, 53, 56, 57 Signal line 2
Remote control device side interface 3 In-office device side interface 6 Transmission speed monitoring and control section 9 Selection circuit 11 Transmission section 14 Receiving section 40 Clock generator 45 Gate 52 Transmission speed detection circuit 54 Control section 55 Selector

Claims (1)

[Claims] 1. A first interface section that is connected to a device for remote monitoring and control of an in-office device and detects input transmission speed information, and a second interface section that is connected to the in-office device and performs data transmission. a first detection circuit that detects the transmission speed of the in-office device in response to the transmission data and transmission clock received via the second interface section; a selection circuit that selects one of the detected transmission speed information; a transmitter that sends the transmission speed information selected by the selection circuit to the home data terminal side together with the transmission data; and a transmission section that transmits the data received from the home data terminal side. and a second detection circuit for detecting the transmission rate of the received data in response to a reception clock; circuit means for correcting the transmission rate of the transmitted data in response to the transmission rate information of the received data; an in-office line termination device, comprising: a gate circuit for sending out a signal to the second interface unit.