CN216290995U - PDH optical fiber to 2M protocol converter - Google Patents

Abstract

The utility model discloses a PDH optical fiber to 2M protocol converter, which comprises: the system comprises a PDH interface serial port optical modem, an E1 serial port protocol converter, a 2M interface and a redundant power supply assembly; the PDH interface serial port optical modem is in communication connection with the E1 serial port protocol converter through a serial port, and the E1 serial port protocol converter is in communication connection with the 2M interface; the power output port of the redundant power supply assembly is electrically connected with the PDH interface serial port optical modem, the E1 serial port protocol converter and the 2M interface respectively, because the PDH interface serial port optical modem and the E1 serial port protocol converter are both provided with redundant conversion channels, normal conversion can still be realized when any channel fails, 2 channels of power supply input are arranged, two channels of power supplies can simultaneously supply power to all devices, the normal operation of any device failure converter can be realized, and any channel of power supply failure converter can also normally operate.

Description

PDH optical fiber to 2M protocol converter

Technical Field

The utility model relates to the field of optical fiber communication, in particular to a PDH optical fiber to 2M protocol converter.

Background

With the popularization of optical fiber communication, many transmission interfaces in application fields are optical fiber interfaces, and especially in railway signal communication, many devices are point-to-point PDH optical communication. With the increase of PDH communication equipment of a railway signal machine room, more and more channels are needed for communication, as shown in fig. 1, the number of existing optical fiber channels is often insufficient, but the workload of re-laying optical cables is large and the cost is high, so that an interface conversion requirement is provided on an application site, the existing PDH optical communication of the machine room is converted into 2M communication, the 2M communication is generally applied to an embedded system as a common communication mode, multiple paths of PDH optical fiber communication can be converged into one path of 2M communication through the conversion, and the conversion can meet the existing point-to-point transmission and solve the problem of insufficient communication optical cables in the current interval. However, most of the current 2M protocol converters only provide an RS232 communication interface or an RS422 communication interface (as shown in fig. 2), and cannot meet the requirement of converting PDH optical fiber into 2M, for example, the current RS232 or RS422 communication interface into 2M converters are single-path conversion, and have non-redundant power supplies and relatively low availability, and cannot meet the requirements of railway communication equipment on availability and reliability.

In view of the above, the present invention is particularly proposed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a PDH optical fiber to 2M protocol converter which can realize multi-path conversion and provide a redundant power supply, thereby solving the technical problems in the prior art.

The purpose of the utility model is realized by the following technical scheme:

an embodiment of the present invention provides a PDH fiber to 2M protocol converter, including:

the system comprises a PDH interface serial port optical modem, an E1 serial port protocol converter, a 2M interface and a redundant power supply assembly; wherein the content of the first and second substances,

the PDH interface serial port optical modem is in communication connection with the E1 serial port protocol converter through a serial port, and the E1 serial port protocol converter is in communication connection with the 2M interface;

and the power output port of the redundant power supply assembly is electrically connected with the PDH interface serial port optical modem, the E1 serial port protocol converter and the 2M interface respectively.

Compared with the prior art, the PDH optical fiber to 2M protocol converter provided by the utility model has the beneficial effects that:

the conversion from a multipath PDH optical fiber interface to a 2M interface protocol can be realized by arranging a PDH interface serial port optical modem and an E1 serial port protocol converter, and the method is suitable for a railway signal machine room, wherein multipath PDH equipment is in point-to-point communication with multipath PDH equipment of an opposite station through 1 path of optical fiber; the redundant power supply assembly is arranged to respectively supply power to the PDH interface serial port optical modem, the E1 serial port protocol converter and the 2M interface, so that the power can be normally supplied when any path of power supply fails, the normal work of the PDH optical fiber to 2M protocol converter is ensured, and the availability and the reliability of the converter are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic diagram of a railway PDH optical communication architecture provided in the prior art;

fig. 2 is a schematic diagram of a prior art architecture for converting PDH optical communication into 2M communication;

fig. 3 is a schematic diagram illustrating a PDH to 2M protocol converter according to an embodiment of the present invention;

fig. 4 is a specific circuit diagram of a PDH optical fiber to 2M protocol converter according to an embodiment of the present invention;

in fig. 3: 1-PDH interface serial port optical modem; 2-E1 serial port protocol converter; a 3-2M interface; 4-redundant power supply components; 41-a first power supply path; 411 — first power isolation device; 412-a first power input port; 42-a second power supply path; 421-a second power isolation device; 422-second power supply input port.

Detailed Description

The technical scheme in the embodiment of the utility model is clearly and completely described below by combining the attached drawings in the embodiment of the utility model; it is to be understood that the described embodiments are merely exemplary of the utility model, and are not intended to limit the utility model to the particular forms disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

The terms that may be used herein are first described as follows:

the term "and/or" means that either or both can be achieved, for example, X and/or Y means that both cases include "X" or "Y" as well as three cases including "X and Y".

The terms "comprising," "including," "containing," "having," or other similar terms of meaning should be construed as non-exclusive inclusions. For example: including a feature (e.g., material, component, ingredient, carrier, formulation, material, dimension, part, component, mechanism, device, process, procedure, method, reaction condition, processing condition, parameter, algorithm, signal, data, product, or article of manufacture), is to be construed as including not only the particular feature explicitly listed but also other features not explicitly listed as such which are known in the art.

The term "consisting of … …" is meant to exclude any technical feature elements not explicitly listed. If used in a claim, the term shall render the claim closed except for the inclusion of the technical features that are expressly listed except for the conventional impurities associated therewith. If the term occurs in only one clause of the claims, it is defined only to the elements explicitly recited in that clause, and elements recited in other clauses are not excluded from the overall claims.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured," etc., are to be construed broadly, as for example: can be fixedly connected, can also be detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms herein can be understood by those of ordinary skill in the art as appropriate.

The terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship that is indicated based on the orientation or positional relationship shown in the drawings for ease of description and simplicity of description only, and are not intended to imply or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting herein.

The PDH-to-2M protocol converter provided by the present invention is described in detail below. Details which are not described in detail in the embodiments of the utility model belong to the prior art which is known to the person skilled in the art. Those not specifically mentioned in the examples of the present invention were carried out according to the conventional conditions in the art or conditions suggested by the manufacturer. The reagents or instruments used in the examples of the present invention are not specified by manufacturers, and are all conventional products available by commercial purchase.

As shown in fig. 3 and 4, an embodiment of the present invention provides a PDH optical fiber to 2M protocol converter, including:

the system comprises a PDH interface serial port optical modem, an E1 serial port protocol converter, a 2M interface and a redundant power supply assembly; wherein the content of the first and second substances,

the PDH interface serial port optical modem is in communication connection with the E1 serial port protocol converter through a serial port, and the E1 serial port protocol converter is in communication connection with the 2M interface;

and the power output port of the redundant power supply assembly is electrically connected with the PDH interface serial port optical modem, the E1 serial port protocol converter and the 2M interface respectively.

In the above converter, the redundant power supply module includes: a first power supply path and a second power supply path; wherein the content of the first and second substances,

the first power supply path is provided with a first power supply input port and a first power supply output port;

the second power supply path is provided with a second power supply input port and a second power supply output end;

the first power supply output and the second power supply output are electrically connected as a power supply output of the redundant power supply assembly.

In the converter, the first power supply path is composed of a first power input port and a first power isolation device which are connected in sequence;

the second power supply path consists of a second power supply input port and a second power supply isolation device which are connected in sequence;

the first power output terminal of the first power isolation device is electrically connected to the second power output terminal of the second power isolation device as the power output port of the redundant power supply assembly.

In the converter, the first power isolation device and the second power isolation device both adopt isolation diodes;

the first power input port and the second power input port both adopt aerial plug interfaces.

In the converter, the PDH interface serial port optical modem adopts a photoelectric converter; a photoelectric converter of model 2501S is preferably used.

The E1 serial port protocol converter preferably adopts an E1 serial port protocol converter with the model number of MA 20R.

The 2M interface is integrated on the E1 serial port protocol converter.

In summary, in the PDH optical fiber to 2M protocol converter according to the embodiment of the present invention, since the E1 serial protocol converter can implement multiplexing, the converter can implement multiplexing to a 2M interface, and a redundant power supply module having two power supply paths is provided to supply power to each device, so that when one power supply fails, the operation of the converter is not affected, and the reliability is improved.

In order to more clearly show the technical solutions and the technical effects provided by the present invention, the PDH-to-2M protocol converter provided by the embodiments of the present invention is described in detail below with specific embodiments.

Examples

As shown in fig. 3 and 4, the PDH fiber to 2M protocol converter of this embodiment is composed of 4 parts: a PDH interface serial optical modem (device 2501S), an E1 serial protocol converter (device MA20R), a 2M interface (integrated on MA20R), a redundant power supply assembly (aviation plug CT73H18L-4ZJ1X-02 and an isolation diode 1N 5408);

the PDH interface serial port optical modem is in communication connection with the 2M interface through the E1 serial port protocol converter; specifically, a 1-4 interface of the PDH interface serial optical modem is consistent with serial wiring of an E1 serial protocol converter, T of the E1 serial protocol converter is connected with R of MA20R, R of 2501S is connected with T of MA20R, and MA20R externally provides an unbalanced 75 Ω BNC interface; the 1-4 interfaces of the PDH interface serial port optical modem are divided into two groups, the 1-4 interfaces of the E1 serial port protocol converter are also divided into 2 groups, the uplink direction is 2, the downlink direction is 2, the uplink direction and the downlink direction are redundant, and the converter can work normally when any PDH interface serial port optical modem or any E1 serial port protocol converter fails;

the redundant power supply assembly supplies power for the PDH interface serial port optical modem, the E1 serial port protocol converter and the 2M interface respectively.

The PDH interface serial port optical modem converts a PDH optical fiber signal into an RS422 serial port signal, the PDH optical fiber signal is different in implementation mode, wavelength and modulation method of each manufacturer, and the PDH optical fiber signal is converted into the RS422 serial port signal with the same standard through the PDH interface serial port optical modem;

the E1 serial port protocol converter converts the standard RS422 signal into a 2M signal which accords with physical/electrical characteristics of ITU-T G.703 series digital interfaces;

the 2M interface provides an unbalanced 75 omega BNC interface externally.

The power supply input of the redundant power supply assembly comprises a first power supply input port and a second power supply input port, and after passing through the first power supply isolation device and the second power supply isolation device respectively, the power supply input port and the second power supply isolation device form a path of power supply to supply power to each device (2501S, MA 20R).

In summary, in the converter according to the embodiment of the present invention, both the PDH interface serial optical modem and the E1 serial protocol converter are provided with redundant conversion paths, so that normal conversion can be performed when any path fails, and 2 power inputs are provided, so that two power supplies can simultaneously supply power to each device, and thus, any device failure converter can work normally, and any power failure converter can also work normally.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Claims (5)

1. A PDH fiber to 2M protocol converter, comprising:

the system comprises a PDH interface serial port optical modem, an E1 serial port protocol converter, a 2M interface and a redundant power supply assembly; wherein the content of the first and second substances,

the PDH interface serial port optical modem is in communication connection with the E1 serial port protocol converter through a serial port, and the E1 serial port protocol converter is in communication connection with the 2M interface;

and the power output port of the redundant power supply assembly is electrically connected with the PDH interface serial port optical modem, the E1 serial port protocol converter and the 2M interface respectively.

2. A PDH fiber to 2M protocol converter as defined in claim 1, wherein the redundant power supply component comprises: a first power supply path and a second power supply path; wherein the content of the first and second substances,

the first power supply path is provided with a first power supply input port and a first power supply output port;

the second power supply path is provided with a second power supply input port and a second power supply output end;

the first power supply output and the second power supply output are electrically connected as a power supply output of the redundant power supply assembly.

3. A PDH fiber to 2M protocol converter as defined in claim 2, wherein the first power supply path is composed of a first power input port and a first power isolation device connected in sequence;

the second power supply path consists of a second power supply input port and a second power supply isolation device which are connected in sequence;

the first power output terminal of the first power isolation device is electrically connected to the second power output terminal of the second power isolation device as the power output port of the redundant power supply assembly.

4. A PDH fiber to 2M protocol converter as defined in claim 3 wherein the first and second power isolation devices each employ an isolation diode;

the first power input port and the second power input port both adopt aerial plug interfaces.

5. A PDH optical fiber to 2M protocol converter according to any one of claims 1 to 4, wherein a photoelectric converter is adopted by the PDH interface serial port optical modem;

the 2M interface is integrated on the E1 serial port protocol converter.

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