Chapter 5: Operation

5.3 Link Fault Pass Through Function

In common situations, when one side of the link fails, the other side continues transmitting packets and waits for a response that never arrives from the disconnected side.

With the Link Fault Passthrough function enabled (optional with switch LFP), the TP port and FX port of the same converter will tell each other the fault link status so that when one side of the link fails, the other side will force the link to shut down as soon as noticed. See Figure 5-3.

Device A

UTP

TP Port A

 

cable link failed

 

 

 

 

 

 

LHC201A

or LHC202A

Fiber Port A

sends non-idle Fiber cable pattern

 

 

UTP

TP Port B

cable

link failed

Device B

 

 

 

 

 

 

 

 

LHC201A

or

LHC202A

Fiber Port B

gets link fault

information

Figure 5-3. Link Fault Passthrough.

If link fail happens on TP port (A), the FX port (A) sends a non-idle pattern to notice the FX port (B). The FX port (B) then forces its TP port (B) to link failed after receiving the non-idle pattern. Link status LED will also be off for both converters and devices as shown in Table 5-4.

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Black Box LHC202A, LHC201A, Pure Networking Fast Ethernet Media Converters manual Link Fault Pass Through Function

LHC201A, Pure Networking Fast Ethernet Media Converters, LHC202A specifications

The Black Box LHC202A and LHC201A are essential components in modern networking solutions, particularly for businesses looking to enhance their connectivity and streamline data transmission over various media types. These fast Ethernet media converters are designed to facilitate high-speed data transfer between different network media, such as fiber optic and copper cabling, ensuring seamless communication in diverse environments.

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