JP3616585B2 - Optical interface termination module and optical interface termination connection method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical interface termination module and an optical interface termination connection method, and more particularly to an apparatus-embedded optical interface termination module and an optical interface termination connection method.
[0002]
[Prior art]
Conventionally, an optical interface termination module and an optical interface termination connection method are configured as, for example, a device-embedded optical interface termination module and an optical interface termination connection method. Such conventional optical interface termination is performed by a digital line connection unit (DSU / digital service unit) which is a separate device, and even when the distance between the optical interface termination module of the apparatus and the digital line connection unit is short, An interface defined in the recommendation is used between the device and the digital line connection device.
[0003]
The DSU is a device that is installed in a user's home by a first-class communication carrier, and has a function of converting a signal from the user's terminal into a signal suitable for transmission on the network side.
[0004]
FIG. 5 is a block diagram showing a configuration example of a conventional DSU, and FIG. 6 is a diagram showing a configuration example of a data format corresponding to this. The conventional DSU 100 shown in FIG. 5 includes the optical module 10, the subscriber-side termination unit 15, the terminal-side termination unit 18, the driver / receiver 19, and the transformer 20. In the DSU 100 of this configuration, the optical module 10 adopts a transmission line side interface (subscriber line), and the apparatus side to which the DSU is connected adopts a terminal side interface via the transformer 20. The terminal side adopts an interface with format data based on the format standards JT-I431 and JT-G703-a, for example.
[0005]
In the configuration example of the conventional data format standard / JT-I431 shown in FIG. 6, this JT-I431 standard includes 21) JT-I431 format data, 22) DATA bit, and 23) B8ZS / AMI code. Is done. Note that 23) B8ZS / AMI code indicates a terminal-side interface.
[0006]
As a prior invention example 1 similar to the present invention in the technical field, there is "DSU station power supply termination circuit and DSU module" of JP-A-6-311206. In the first prior invention example 1, the local power supply is terminated at the DSU, and the power supplied to the terminal is taken from the power supply on the apparatus side. As a result, the DC / DC converter and series regulator that occupy a large space in the DSU can be eliminated, and the DSU can be made small, thin, and economical.
[0007]
Further, “Optical subscriber line terminating device and power feeding method thereof” of Japanese Patent Laid-Open No. Hei 8-191273 of Conventional Example 2 discloses a technique for reducing power consumption in a standby state. Furthermore, the “optical network termination device” disclosed in Japanese Patent Laid-Open No. 10-70513 of Conventional Example 3 is a card type in which the circuit configuration of the device can be inserted and removed.
[0008]
[Problems to be solved by the invention]
However, in the above prior art, even if the distance between the optical interface termination module (DSU module) of the device and the digital line connection device is a short distance, the interface defined between the device and the digital line connection device is recommended. Is used. For this reason, the configuration of the digital line connection apparatus is complicated and large-scale, and there is a problem in that the apparatus becomes large and expensive.
[0009]
It is an object of the present invention to provide a device-embedded optical interface termination module and an optical interface termination connection method that simplify the interface between devices.
[0010]
[Means for Solving the Problems]
In order to achieve this object, an optical interface termination module according to claim 1 is connected between an optical line and a device, converts an optical signal input from the optical line into an electrical signal, and outputs the electrical signal to the device. An optical interface termination module that converts an electrical signal input from a device into an optical signal and outputs the optical signal to an optical line, and performs photoelectric conversion from the optical signal to the electrical signal and photoelectric conversion from the electrical signal to the optical signal. Module and first termination means for terminating an electrical signal photoelectrically converted by the optical module in accordance with an optical line interface standard and converting an electrical signal input from the apparatus into a data format in accordance with the optical line interface standard Then, the electrical signal terminated by the first termination means is converted into a data format that can be received by the device, and the electrical signal input from the device is converted to an optical line interface. Second termination means for converting to a data format conforming to the standard, and when the second termination means receives an electrical signal from the first termination means, it generates a frame identification signal together with the data signal The frame identification signal is transmitted to the apparatus .
[0011]
Furthermore, it configured to accommodate within the device, between the device is short transmission, electrical signals between the devices, may not be bound by the interface specified in Recommendation.
[0012]
According to a fourth aspect of the present invention, there is provided an optical interface termination connection method that photoelectrically converts an optical signal input from an optical line into an electric signal and converts the optical signal into a data format that can be received by the apparatus after terminating in accordance with the interface standard of the optical line. An optical interface comprising: a step of converting and outputting to an apparatus; and an step of converting an electric signal input from the apparatus into a data format conforming to an interface standard of the optical line, and converting the electric signal into an optical signal and outputting the optical signal to the optical line A termination connection method, characterized in that when an optical signal from an optical line is photoelectrically converted into an electrical signal, a frame identification signal is generated together with a data signal, and the frame identification signal is transmitted to the apparatus. It is said.
[0013]
In addition, the above processes are processed in the apparatus, the optical interface termination module and the interface between apparatuses are short-distance transmission, and the transmission procedure between the optical interface termination module and the apparatus is a procedure stipulated in a recommendation or the like. It is better to be able to configure without being caught by.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of an optical interface termination module and an optical interface termination connection method according to the present invention will be described in detail with reference to the accompanying drawings. 1 to 4, an embodiment of an optical interface termination module and an optical interface termination connection method according to the present invention is shown.
[0015]
FIG. 1 shows a functional configuration example of the present invention. The optical interface termination module (DSU module) and the optical interface termination connection method according to the present embodiment are equipped and mounted on the optical interface side of the apparatus 2. The optical interface termination module (DSU module) 1 includes an O / E (optical / electrical) conversion unit 11, an E / O (electrical / optical) conversion unit 12, a frame termination unit 13, and a data conversion unit 14. Composed.
[0016]
The O / E conversion unit 11 and the E / O conversion unit 12 convert optical signals and electrical signals. The frame termination unit 13 terminates frame data in accordance with the optical interface standard. Further, the data conversion unit 14 for simplifying the interface between the devices performs data format conversion that can be transmitted and received by the device 2.
[0017]
In the optical interface termination module and optical interface termination connection method shown in FIG. 1, the O / E converter 11 converts an optical signal into an electrical signal, and the frame termination unit 13 converts frame data in accordance with the optical interface standard. After the termination, the data converter 14 converts the data into a data format that can be received by the device 2.
[0018]
The data converter 14 receives transmission data from the apparatus 2 and the frame terminator 13 converts it into frame data in accordance with the optical interface standard. After the frame data is converted, the E / O converter 12 converts it into an optical signal.
[0019]
(Example)
FIG. 2 is a block diagram of the configuration when the above-described optical interface termination module is constructed as a built-in DSU 1a. The built-in DSU 1a of FIG. 2 includes an optical module 10, a subscriber-side termination unit 15, and a terminal-side termination unit 16. These optical modules 10 have functions corresponding to the O / E converter 11 and the E / O converter 12 in FIG. The subscriber-side termination unit 15 also corresponds to the frame termination unit 13. The terminal side termination unit 16 also corresponds to the data conversion unit 14.
[0020]
The optical module 10 is a functional unit that interfaces with a transmission path side interface (subscriber line) which is an optical interface side. The subscriber side termination unit 15 is a functional unit that terminates frame data. The terminal side termination unit 16 is an interface unit with the terminal device 2, and transmits and receives the DATA and CLK signals as TTL level signals.
[0021]
FIG. 3 and FIG. 4 show a configuration example of a data (DATA) format conforming to two kinds of standards, JT-I431 standard and JT-G703-a standard. FIG. 3 showing a data format configuration example 1 conforming to the JT-I431 standard shows 1) JT-I431 format configuration data, 2) specific example of DATA bit configuration, 3) DATA, and 4) CLK signal configuration examples. Represents. Note that 3) DATA and 4) CLK signal are TTL signals.
[0022]
FIG. 4 showing a data format configuration example 2 conforming to the JT-G703-a standard includes 11) data of the JT-G703-a format configuration, 12) a specific example of the DATA bit configuration, 13) DATA, and 14) CLK. Each structural example of the signal, 15) represents a frame signal. In FIG. 3 and FIG. 4, symbol F represents a frame bit, and symbol D represents a data bit. Each signal of 13) DATA, 14) CLK, and 15) frame is a TTL signal.
[0023]
According to the above embodiment, compared with the prior art, since the DSU is a built-in device type and can be arranged at the closest position of the device, it is possible to perform transmission / reception signals with the device 2 side at the TTL level. The receiver 19 and the transformer 20 are not necessary. Therefore, the embedded DSU 1a can be reduced in size and measured.
[0024]
The above-described embodiment is an example of a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.
[0025]
【The invention's effect】
As is clear from the above description, the optical interface termination module and the optical interface termination connection method according to the present invention convert an optical signal into an electrical signal, convert the electrical signal into an optical signal, and comply with the standard of the optical interface of the line. The frame data is terminated and converted into a data format that can be transmitted and received by the device. By this procedure, an interface with a signal in a data format that can be transmitted and received with an optical line is performed. For this reason, the configuration scale of the digital line connection device is simplified, and the device can be reduced in size and simplified.
[0026]
In other words, the effect of the present invention is that the interface between the optical interface termination module (DSU module) and the apparatus is short-distance transmission by adopting the apparatus built-in type, and the optical interface other than the interface specified in the recommendation or the like. It is possible to connect between the termination module (DSU module) and the device. By incorporating an optical interface termination module (DSU module), the apparatus can realize an optical interface termination function without using an interface circuit defined in a recommendation or the like.
[0027]
Therefore, according to the present invention, it is possible to provide a device-embedded optical interface termination module (DSU module) in which the interface with the device is simplified so that the device can easily realize the optical interface termination function.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration example of an optical interface termination module according to the present invention.
FIG. 2 is a block diagram of a configuration when an optical interface termination module is constructed as an embedded DSU 1a.
FIG. 3 is a diagram illustrating a configuration example of a data (DATA) format according to the JT-I431 standard.
FIG. 4 is a diagram illustrating a configuration example of a data (DATA) format conforming to the JT-G703-a standard.
FIG. 5 is a block diagram illustrating a configuration example of a conventional DSU.
FIG. 6 is a diagram illustrating a configuration example of a data format corresponding to a conventional DSU.
[Explanation of symbols]
1 Optical interface termination module (DSU module)
2 (DSU is connected) device 10 Optical module 11 O / E conversion unit 12 E / O conversion unit 13 Frame termination unit 14 Data conversion unit 15 Subscriber side termination unit 16 Terminal side termination unit

Claims (6)

Connected between a predetermined optical line and a device, converts an optical signal input from the optical line into an electric signal and outputs it to the device, and converts an electric signal input from the device into an optical signal. An optical interface termination module that outputs to the optical line,
An optical module that performs photoelectric conversion from an optical signal to an electrical signal and photoelectric conversion from an electrical signal to an optical signal;
Frame data consisting of electrical signals photoelectrically converted by the optical module is terminated according to the interface standard of the optical line, and the electrical signal input from the device is converted into a data format according to the interface standard of the optical line First termination means to
The frame data terminated by the first termination means is converted into a data format that can be received by the device, and the frame data composed of an electrical signal input from the device is converted to data in accordance with the interface standard of the optical line. Second termination means for converting to a format,
The second termination unit generates a frame identification signal together with a data signal when frame data is input from the first termination unit, and transmits the frame identification signal to the device. Optical interface termination module. The optical interface termination module according to claim 1, wherein the optical interface termination module is configured to be accommodated in the apparatus. Between the device is short transmission, electrical signals, optical interface termination module according to claim 1 or 2, wherein the never bound by the interface specified in Recommendation between the device . The frame data based on the optical signal input from a predetermined optical line is photoelectrically converted into an electric signal, converted into a data format that can be received by the apparatus after being terminated in accordance with the interface standard of the optical line, and output to the apparatus And a process of
An optical interface termination connection method comprising: converting frame data based on an electrical signal input from the apparatus into a data format conforming to the interface standard of the optical line; and converting the frame data into an optical signal and outputting the optical signal to the optical line. Because
An optical interface termination connection method comprising: generating a frame identification signal together with a data signal and transmitting the frame identification signal to the device when photoelectrically converting an optical signal from the optical line into an electrical signal. 5. The optical interface termination connection method according to claim 4, wherein each of the steps is processed in the apparatus. The interface between the optical interface termination module and the device is short-distance transmission, and the transmission procedure between the optical interface termination module and the device can be configured without being bound by the procedure stipulated in the recommendation. The optical interface termination connection method according to claim 4 or 5.

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