KR102170181B1 - Apparatus and method for monitoring communication quality - Google Patents

Abstract

The present invention is to provide an apparatus and method for monitoring communication quality for transmitting a sub transmission signal branched from a main transmission signal to a monitoring device. According to an embodiment of the present invention, a method for monitoring communication quality comprises the steps of: outputting a first main transmission signal from a first switch; transmitting the first main transmission signal output from the first switch to a second switch through a main optical transmission module; obtaining a first sub transmission signal through a first branch path branched by at least one of the first switch and a first interface converter of a main optical transmission module of the main optical transmission module connected to the first switch from a first transmission path formed from the first switch to the second switch; and transmitting the first sub transmission signal to a signal analysis apparatus through a first sub optical transmission module.

Description

Communication quality monitoring device and method {APPARATUS AND METHOD FOR MONITORING COMMUNICATION QUALITY}

The present invention relates to a communication quality monitoring apparatus and method for monitoring communication quality between networks.

A network management system (NMS) is a generic term for a computer network or a combination of hardware and software used to monitor and manage networks. In the case of a communication network operator or a company with a single network, the network management system can be used to monitor and monitor the network. These network management systems can be classified into various types such as wired systems and wireless systems based on IP/transmission/switching media according to the network.

In the operational management business area, failure handling is a business area that is directly connected to the survivability of the service, so rapid processing may be important. Accordingly, the network management system can monitor the communication quality of the network by analyzing signals transmitted and received for communication on a network or between heterogeneous networks.

For example, the network management system may acquire a transmission signal transmitted from one switch to another switch through a separate means, and analyze the obtained transmission signal to monitor communication quality.

Korean Registered Patent Publication, No. 10-0262424 (registered on August 13, 2004)

The problem to be solved by the present invention is to provide a communication quality monitoring apparatus and method for transmitting a sub transmission signal branched from a main transmission signal to a monitoring device.

However, the problem to be solved by the present invention is not limited to those mentioned above, and another problem to be solved that is not mentioned may be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be.

A communication quality monitoring method according to an embodiment of the present invention includes: outputting a first main transmission signal from a first switch; Transmitting the first main transmission signal output from the first switch to a second switch through a main optical transmission module; Branched from a first transmission path formed from the first switch to the second switch by at least one of the first switch and a first interface converter of the main optical transmission module connected to the first switch Obtaining a first sub transmission signal through a first branch path; And transmitting the first sub transmission signal to a signal analysis apparatus through a first sub optical transmission module.

In addition, obtaining the first sub transmission signal may include: receiving, by the first switch, the first main transmission signal; Providing the received first main transmission signal to a main transmission port of the first switch; And acquiring the first sub transmission signal through the first branch path branched from the provision path of the first switch to the main transmission port and connected to the first sub transmission port of the first switch. I can.

In addition, the step of transmitting the first sub-transmission signal to the signal analysis device may include transmitting the first sub-transmission signal to the signal through a first sub-optical transmission module connected to the first sub-transmission port of the first switch. Can be transmitted to the analysis device.

Further, the main optical transmission module may include a main optical cable forming a first transmission path through which the first main transmission signal is transmitted; And a plurality of interface converters provided at both ends of the main optical cable so as to be connected to each of the first switch and the second switch.

Further, the obtaining of the first sub transmission signal may include: receiving the first main transmission signal from the first switch by the first interface converter connected to the first switch; Providing the received first main transmission signal to the main optical cable; And a third branch path branched from the provision path of the first interface converter to the main optical cable and connected to the third sub transmission port of the first interface converter to obtain a third sub transmission signal.

In addition, the transmitting of the sub transmission signal to the signal analysis device may include transmitting the third sub transmission signal to the signal analysis device through a third sub optical transmission module connected to the third sub transmission port of the first interface converter. Can be transferred to.

In addition, outputting a second main transmission signal from the second switch; Transmitting the second main transmission signal output from the second switch to a first switch through the main optical transmission module; Acquiring a second sub-transmission signal through a second branch path branched by the second switch from a second transmission path formed from the second switch to the first switch; And transmitting the second sub transmission signal to a signal analysis device through a second sub optical transmission module.

In addition, outputting a second main transmission signal from the second switch; Transmitting the second main transmission signal output from the second switch to a first switch through the main optical transmission module; Obtaining a fourth sub transmission signal from the second switch through a fourth branch path branched by the second interface converter of the main optical transmission module connected to the second switch from the second transmission path formed by the first switch The step of doing; And transmitting the fourth sub transmission signal to a signal analysis device through a fourth sub optical transmission module.

Communication quality monitoring apparatus according to an embodiment of the present invention, the first switch for outputting a first main transmission signal; A second switch for receiving the first main transmission signal; And a main optical transmission module for transmitting the first main transmission signal output from the first switch to the second switch, the first interface converter connected to the first switch and the first switch. The sub-transmission signal branched from the first main transmission signal by at least one of them is transmitted to the signal analysis apparatus through the first sub-optical transmission module.

According to an embodiment of the present invention, since a transmission signal can be acquired and provided to a monitoring device without a separate means, the complexity of the device configuration can be reduced.

In addition, since the sub transmission signal branched directly from the main transmission signal is used for monitoring, communication quality can be monitored without attenuation of the transmission signal, specifically an optical signal. Specifically, when a transmission signal is distributed to each of the receiving end and the monitoring device by the TAP, the level of the signal received by the receiving end may be lowered, thereby deteriorating communication quality.

1 is a control block diagram of a communication quality monitoring apparatus according to an embodiment of the present invention.
2 is a flowchart of a communication quality monitoring method according to an embodiment of the present invention.
3 is a diagram illustrating a communication quality monitoring method of FIG. 2 applied to a path for providing a sub transmission signal according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating a communication quality monitoring method of FIG. 2 applied to a path for providing a sub transmission signal according to another embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and are common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims.

In describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in an embodiment of the present invention, which may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification.

1 is a control block diagram of a communication quality monitoring apparatus according to an embodiment of the present invention.

The communication quality monitoring apparatus of the present invention may refer to an apparatus that monitors communication quality by analyzing signals transmitted between a plurality of switches. The communication quality monitoring apparatus according to an embodiment may be implemented as a network management system (NMS).

The switch may be connected to a plurality of servers by wire to form a network.

Each of the networks thus formed can communicate with each other through a switch. To this end, different switches constituting different networks can communicate according to various known methods. Switches according to an embodiment may be interconnected by an optical cable to perform optical communication in which an electrical signal is transmitted through an optical signal.

In this case, when there is an error in communication between switches, communication between a plurality of servers connected to each switch may not be possible. As a result, various services provided by a plurality of servers may not be normally provided to users.

To prevent this, the communication quality monitoring apparatus may obtain a signal used for communication between switches, check communication quality, and determine whether an abnormality occurs. One of the methods of acquiring a signal used for communication between switches is to use a Network TAP (Terminal Access Port).

The TAP may refer to a device that branches a signal transmitted on a network. Specifically, when any one switch outputs a transmission signal, the output signal may be provided to the TAP through an optical cable. The provided TAP may transmit a signal to a switch corresponding to the corresponding signal and transmit the same signal branched from the transmitted signal to a separately provided monitoring means. That is, the TAP is disposed on the signal transmission path between the plurality of switches, so that the signal through which the TAP is transmitted can be simultaneously transmitted to the switch of the receiving side and the monitoring means. As a result, the transmission signal can be analyzed by the monitoring means, independent of the inter-switch communication being performed.

Meanwhile, since the TAP must simultaneously transmit the signal output by the transmission-side switch to the receiving-side switch and the monitoring means, the transmitted signal may be attenuated from the initially output signal. When the receiving-side switch determines that the signal is not a meaningful signal and ignores the received signal when the level is less than the predetermined threshold level, the transmitted signal attenuated below the threshold level by the TAP will not be received by the receiving-side switch. I can. Since the receiving-side switch is ported down at the optical signal below the threshold, it is necessary to minimize attenuation of the optical signal for normal operation.

To solve this problem, the communication quality monitoring apparatus 1 according to an embodiment of the present invention may directly branch a transmitted signal and provide it to the signal analysis apparatus M without using a TAP. Hereinafter, a first switch S ₁ for outputting a transmission signal and a second switch S ₂ for receiving a transmission signal among a plurality of switches constituting the communication quality monitoring apparatus 1 will be described.

Referring to FIG. 1, a communication quality monitoring device 1 according to an embodiment of the present invention may include a first switch S ₁ , a second switch S ₂ , and a signal analysis device M.

Each of the first switch S ₁ and the second switch S ₂ may be connected to a plurality of servers to form respective networks. Each of the first switch S ₁ and the second switch S ₂ is selectively connected to some of a plurality of servers, thereby providing an environment in which communication between different servers is possible.

To this end, the first switch (S ₁ ) and the second switch (S ₂ ) may be connected by wire or wireless to communicate with each other. The first switch S ₁ and the second switch S ₂ according to an exemplary embodiment may convert a main transmission signal into an optical signal to form a main optical transmission path to communicate with each other. In this case, the main optical transmission path may be implemented by a main optical transmission module connected to each of the first switch (S ₁ ) and the second switch (S ₂ ), and the main optical transmission path according to an embodiment is a first A first transmission path from the switch S ₁ to the second switch S ₂ and a second transmission path from the second switch S ₂ to the first switch S ₁ may be included.

The signal analysis device M may monitor communication quality by analyzing a sub transmission signal branching from the main transmission signal. Here, the sub transmission signal is a signal including the same information as the main transmission signal, and is at the same level as the main transmission signal, or at least a level that can be determined as a meaningful signal by the second switch S ₂ , that is, a level greater than the threshold level. May be a sign of

To this end, the signal analysis apparatus M according to an exemplary embodiment may form a branch path P _S branching from the transmission path P _M so that the sub transmission signal is converted into an optical signal to communicate. In this case, the branch path P _S may be implemented by the signal analysis device M and the sub optical transmission module connected to the transmission path P _M.

So far, each configuration of the communication quality monitoring device 1 has been described. Hereinafter, a communication quality monitoring method performed by the communication quality monitoring apparatus 1 described above, in particular, a method of providing a sub-transmission signal to the signal analysis apparatus M will be described.

FIG. 2 is a flowchart of a communication quality monitoring method according to an embodiment of the present invention, and FIG. 3 is a diagram for explaining the communication quality monitoring method of FIG. 2 applied to a provision path of a sub transmission signal according to an embodiment of the present invention to be.

First, the communication quality monitoring apparatus 1 may output a main transmission signal from the first switch S ₁ (S100). According to the embodiment of FIG. 3, the first switch S ₁ may include a main transmission port M _T1 for outputting a main transmission signal and a main reception port M _R1 for receiving a main transmission signal. The first switch S ₁ may receive a main transmission signal from at least one of a plurality of servers constituting a network and output the received main transmission signal through the main transmission port M _T1 .

Then, the communication quality monitoring apparatus 1 may transmit the main transmission signal output from the first switch S ₁ to the second switch S ₂ through the main optical transmission module L _M (S110). According to the embodiment of Figure 3, the first being the main optical transmission module L _M connected to the main receiving port M _R2 of a switch (S ₁₎ the main transmission port M _T1 and the second switch (S ₂₎ of the main transmission signal It may be transmitted along a first transmission path formed by the main optical transmission module L _M.

A main optical transmission module L _M is provided on a first main interface converter G _M1, the first switch (S ₁₎ of claim 1, the main transmission signal output by the main interface converter G _M1 connected to the first switch (S ₁₎ receiving, connected it to the main optical cable to transmit along a first transmission path F _M, and second, to provide a main transmission signal transmitted along the first transmission path to the second switch (S ₂₎ a second switch (S ₂₎ It may include a second main interface converter G _M2 .

Each of the first main interface converter G _M1 and the second main interface converter G _M2 may be connected to the first switch S ₁ and the second switch S ₂ . Specifically, the first main interface converter G _M1 is connected to the main transmission port M _T1 and the main receiving port M _R1 of the first switch (S ₁ ), and the second main interface converter G _M2 is the second switch (S ₂ ). It can be connected to the main receiving port M _R2 and the main transmitting port M _T2 .

A first switch (S ₁₎ the main transmission port first main interface converter G _M1 connected to the M _T1 is the first switch optical signals to the main transmission signal output by the main transmission port M _T1 of the (S ₁₎ in the electrical signal at Can be converted to In addition, the second main interface converter G _M2 connected to the main receiving port M _R2 of the second switch S ₂ may convert a main transmission signal transmitted through the main optical cable F _M from an optical signal to an electrical signal. To this end, the first main interface converter G _M1 and the second main interface converter G _M2 according to an embodiment may be implemented as a gigabit interface converter (GBIC).

The main optical cable F _M is to proceed to the main transmission signal converted into an optical signal by the first main interface converter G _M1 can be provided on the second main interface converter G _M2. To this end, the main optical cable F _M may include an optical fiber that transmits an optical signal through total reflection.

Referring back to FIG. 2, while transmitting the main transmission signal, the communication quality monitoring apparatus 1 subsidiary through a branch path branching from the first transmission path from the first switch S ₁ to the second switch S ₂ . A transmission signal may be obtained (S120).

According to the exemplary embodiment of FIG. 3, the communication quality monitoring apparatus ₁ may acquire a first sub transmission signal through a first branch path D ₁ branched from the first transmission path. Specifically, the communication quality monitoring apparatus 1 includes a first sub-transmission port S of the branches from the service path of the main transmission port M _T1 of the first switch (S ₁₎ of the first transmission path to the first switch (S ₁₎ The first sub-transmission signal may be obtained through the first branch path D ₁ connected to _T1 .

At this time, the first sub-transmission signal is a signal including the same information as the main transmission signal, and is at the same level as the main transmission signal, or at least a level that can be determined as a meaningful signal by the second switch S ₂ , that is, a threshold level. It may be a signal of a higher level.

Finally, the communication quality monitoring apparatus 1 may transmit the obtained sub transmission signal to the signal analysis apparatus M through the sub optical transmission module (S130).

According to the exemplary embodiment of FIG. 3, the first sub optical transmission module L _S1 may be connected to the first sub transmission port S _T1 of the first switch S ₁ . Specifically, the first sub optical transmission module L _S1 may be connected to the first sub transmission port S _T1 of the first switch S ₁ through the first sub interface converter G _S11 . The first sub-interface converter G _S11 connected to the first sub-transmission port S _T1 converts the obtained first sub-transmission signal from an electrical signal to an optical signal, and the first sub-optical cable F of the first sub-optical transmission module L _{S1 S1} may provide the first sub transmission signal converted into an optical signal to the signal analysis apparatus M.

In addition, when the main transmission signal is transmitted from the second switch (S ₂ ) to the first switch (S ₁ ), the communication quality monitoring device (1) is the second switch (S ₂ ) to the first switch (S ₁ ). A second sub-transmission signal may be obtained through a second branch path D ₂ branched from the second transmission path. Specifically, the communication quality monitoring device 1 is branched from the main transmission port M _T2 of the second switch S ₂ on the second transmission path and connected to the second sub transmission port S _T2 of the second switch S ₂ . A second sub transmission signal may be obtained through the second branch path D ₂ .

In this case, the second sub transmission signal is a signal including the same information as the main transmission signal transmitted from the second switch S ₂ to the first switch S ₁ , and is at the same level as the main transmission signal, or at least the second It may be a level that can be determined by the switch S ₂ as a significant signal, that is, a signal having a level greater than the threshold level.

Further, the second sub optical transmission module L _S2 may be connected to the second sub transmission port S _T2 of the second switch S ₂ . Specifically, the second sub optical transmission module L _S2 may be connected to the second sub transmission port S _T2 of the second switch S ₂ through the second sub interface converter G _S21 . The second sub-interface converter G _S21 connected to the second sub-transmission port S _T2 converts the obtained second sub-transmission signal from an electrical signal to an optical signal, and the second sub-optical cable F of the second sub-optical transmission module L _{S2 S2} may provide the second sub-transmission signal converted into an optical signal to the signal analysis apparatus M.

Until now, the case where the communication quality monitoring method according to the embodiment of FIG. 2 is applied to the provision path of the sub transmission signal according to the embodiment of FIG. 3 has been described. Hereinafter, a case where the communication quality monitoring method according to the embodiment of FIG. 2 is applied to a sub transmission signal providing path according to another embodiment will be described.

FIG. 4 is a diagram illustrating a communication quality monitoring method of FIG. 2 applied to a path for providing a sub transmission signal according to another embodiment of the present invention.

According to the embodiment of FIG. 4, the first switch S ₁ may include a transmission port P _T1 for outputting a main transmission signal and a reception port P _T2 for receiving a main transmission signal. The first switch S ₁ may receive a main transmission signal from at least one of a plurality of servers constituting a network and output the received main transmission signal through a transmission port P _T1 .

Then, the first being the main optical transmission module L _M connected to the receive port P _R2 of the transfer port P _T1 and the second switch (S ₂₎ of the switch (S _1), the main transmission signal of the first switch (S ₁₎ It may be transmitted along a first transmission path formed from the second switch S ₂ through the main optical transmission module L _M.

A main optical transmission module L _M has been provided with a main transmission signal output by the first interface converter G _1, the first switch (S ₁₎ connected to the first switch (S ₁₎ via a first interface converter G _1, The main optical cable F _M that transmits this along the first transmission path, and the second switch (S ₂ ) connected to the second switch (S ₂ ) to provide the main transmission signal transmitted along the first transmission path to the second switch (S ₂ ). 2 interface converter G ₂ may be included.

Each of the first interface converter G ₁ and the second interface converter G ₂ may be connected to the first switch S ₁ and the second switch S ₂ . Specifically, the first interface converter G ₁ is connected to the transmission port P _T1 and the reception port P _R1 of the first switch S ₁ , and the second interface converter G ₂ is the reception port P _R2 of the second switch S ₂ . And the transmission port P _T2 .

A first interface converter G ₁ is connected to the transmission port P _T1 of the switch (S ₁₎ is to convert the main transmission signal outputted by the transmitting port P _T1 of the first switch (S ₁₎ to an optical signal in the electrical signal I can. In addition, the second interface converter G ₂ connected to the reception port P _R2 of the second switch S ₂ may convert a main transmission signal transmitted through the main optical cable F _M from an optical signal to an electrical signal. To this end, the first interface converter G ₁ and the second interface converter G _{2 according} to an embodiment may be implemented with GBIC.

The main optical cable F _M may advance the main transmission signal converted into an optical signal by the first interface converter G ₁ and provide it to the second interface converter G ₂ . To this end, the main optical cable F _M may include an optical fiber that transmits an optical signal through total reflection.

While transmitting the main transmission signal through the first transmission path, the communication quality monitoring apparatus 1 according to the exemplary embodiment of FIG. 4 includes a third branch path D ₃ branching from the first interface converter G ₁ among the first transmission paths. Through this, a third sub-transmission signal may be obtained. Specifically, the communication quality monitoring apparatus 1 includes a first interface converter G ₁ in the main is branched from the optical cable provides the path to the F _M first interface converter third sub-transmission a third quarter of the port connected to the S _T3 of G ₁ A third sub-transmission signal may be obtained through path D ₃ .

In this case, the third sub-transmission signal is a signal including the same information as the main transmission signal transmitted through the first transmission path, and is at the same level as the main transmission signal, or is determined to be a significant signal at least in the second switch (S ₂ ). The signal may be at a level that can be performed, that is, a level greater than the threshold level.

The obtained third sub transmission signal may be transmitted to the signal analysis device M through the third sub optical transmission module L _S3 connected to the third sub transmission port S _T3 of the first interface converter G ₁ . In this case, unlike the first sub optical transmission module L _S1 and the second sub optical transmission module L _{S2 of} FIG. 3, the third sub optical transmission module L _S3 does not require a separate interface converter, and the main optical transmission module L _M It may include a third sub optical cable F _S3 connected to the first interface converter G ₁ .

In addition, the communication quality monitoring apparatus 1 according to another embodiment of FIG. 4 is the second transmission path formed from the second switch S ₂ through the main optical transmission module L _M to the first switch S ₁ . The fourth sub-transmission signal may be obtained through the fourth branch path D ₄ branched from the 2 interface converter G ₂ . Specifically, the communication quality monitoring apparatus 1 has a second interface converter G ₂ is branched from the inside of the main transmit signal path provided a second interface converter G ₂ of the fourth sub-transmission fourth branch path D ₄ is connected to the port S _T4 Through it, a fourth sub-transmission signal may be obtained.

At this time, the fourth sub-transmission signal is a signal including the same information as the main transmission signal transmitted through the second transmission path, and is at the same level as the main transmission signal, or is determined to be a significant signal at least in the second switch (S ₂ ). The signal may be at a level that can be performed, that is, a level greater than the threshold level.

The obtained fourth sub transmission signal may be transmitted to the signal analysis apparatus M through the fourth sub optical transmission module L _S4 connected to the fourth sub transmission port S _T4 of the second interface converter G ₂ . At this time, like the third sub optical transmission module L _S3 , the fourth sub optical transmission module L _S4 does not require a separate interface converter, and the fourth sub is connected to the second interface converter G ₂ of the main optical transmission module L _M. It may include an optical cable F _S4 .

The communication quality monitoring apparatus and method according to the above-described embodiment can obtain a transmission signal without additional means and provide it to the monitoring device, thereby reducing the complexity of the device configuration.

In addition, since the sub transmission signal branched directly from the main transmission signal is used for monitoring, communication quality can be monitored without attenuation of the transmission signal, specifically an optical signal. Specifically, when a transmission signal is distributed to each of the receiving end and the monitoring device by the TAP, the level of the signal received by the receiving end may be lowered, thereby deteriorating communication quality.

Meanwhile, each step included in the communication quality monitoring method according to the above-described embodiment may be implemented in a computer-readable recording medium that records a computer program programmed to perform this step.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential quality of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

According to an embodiment, since the above-described communication quality monitoring apparatus and method can be used in various fields such as indoors or industrial sites, there is a possibility of industrial use.

1: communication quality monitoring device
S ₁ : 1st switch
S ₂ : second switch
M: monitoring device

Claims (9)

Outputting a first main transmission signal from a first switch;
Transmitting the first main transmission signal output from the first switch to a second switch through a main optical transmission module;
From a first transmission path formed from the first switch to the second switch, the first switch and the first interface converter of the main optical transmission module connected to the first switch may Acquiring a first sub transmission signal branched from one main transmission signal through a first branch path; And
Transmitting the first sub transmission signal to a signal analysis device through a first sub optical transmission module
Communication quality monitoring method. The method of claim 1,
Obtaining the first sub-transmission signal,
Receiving the first main transmission signal by the first switch;
Providing the received first main transmission signal to a main transmission port of the first switch; And
Obtaining the first sub transmission signal through the first branch path branched from the provision path of the first switch to the main transmission port and connected to the first sub transmission port of the first switch
Communication quality monitoring method. The method of claim 2,
Transmitting the first sub transmission signal to a signal analysis device,
Transmitting the first sub transmission signal to the signal analysis device through a first sub optical transmission module connected to the first sub transmission port of the first switch
Communication quality monitoring method. The method of claim 1,
The main optical transmission module,
A main optical cable forming a first transmission path through which the first main transmission signal is transmitted; And
Including a plurality of interface converters provided at both ends of the main optical cable so as to be connected to each of the first switch and the second switch
Communication quality monitoring method. The method of claim 4,
Obtaining the first sub-transmission signal,
Receiving the first main transmission signal from the first switch by the first interface converter connected to the first switch;
Providing the received first main transmission signal to the main optical cable; And
Including the step of obtaining a third sub transmission signal through a third branch path branched from the providing path to the main optical cable in the first interface converter and connected to the third sub transmission port of the first interface converter
Communication quality monitoring method. The method of claim 5,
Transmitting the sub transmission signal to a signal analysis device,
Transmitting the third sub transmission signal to the signal analysis device through a third sub optical transmission module connected to the third sub transmission port of the first interface converter
Communication quality monitoring method. The method of claim 1,
Outputting a second main transmission signal from a second switch;
Transmitting the second main transmission signal output from the second switch to a first switch through the main optical transmission module;
Acquiring a second sub-transmission signal through a second branch path branched by the second switch from a second transmission path formed from the second switch to the first switch; And
Further comprising the step of transmitting the second sub transmission signal to a signal analysis device through a second sub optical transmission module
Communication quality monitoring method. The method of claim 1,
Outputting a second main transmission signal from a second switch;
Transmitting the second main transmission signal output from the second switch to a first switch through the main optical transmission module;
Obtaining a fourth sub transmission signal from the second switch through a fourth branch path branched by the second interface converter of the main optical transmission module connected to the second switch from the second transmission path formed by the first switch Step to do; And
Transmitting the fourth sub transmission signal to a signal analysis device through a fourth sub optical transmission module
Communication quality monitoring method. A first switch outputting a first main transmission signal;
A second switch for receiving the first main transmission signal; And
A main optical transmission module for transmitting the first main transmission signal output from the first switch to the second switch,
A sub transmission signal branched from the first main transmission signal by any one of the first switch and a first interface converter connected to the first switch is transferred to the signal analysis device through the first sub optical transmission module. Transmitted
Communication quality monitoring device.

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