GigaCore switches Fiber Optic cabling

GigaCore switches Fiber Optic cabling

This document will describe how to connect all your network devices via fiber optic and what to look out for on hardware level.

SFP Technical Info

In order to connect all the fiber links in the correct order we need to know which side of the SFP transceiver is the Tx and which side is the Rx.
The Tx is always on the left-hand side when facing the output of the transceiver with the label facing to the top:

Fiber cables

In order to make the fiber work we need to make sure the fiber cables are crossed.
The reason fiber cabling is crossed is simple: when connecting fiber from one device to another, the fiber strands need to be crossed so that Tx goes to Rx on each end. For this reason, fiber patch cables are crossed, but when you have horizontal cabling, you have two fiber patch cords which cancel each other out.

Patch panel connectors

In order to make sure the fibers get crossed correctly it is important to be consistent with how we connect our patch cables to the panelmount connectors.
The Tx is always connected to the A side on the back, the Rx is always connected to the B side on the back

The left-hand side "Tx" on the SFP always gets connected to the right-hand side on the rear of the Neutrik panel mount labelled as A

The right-hand side "Rx" on the SFP always gets connected to the left-hand side on the rear of the Neutrik panel mount labelled as B

In the Case of an Opticalcon Quad ( NO4FDW-A ), the top pair is connected to the first port and the bottom pair to the second port.
For example, on a Gigacore 10 : top pair is port 9 and bottom pair is port 10.

When using FiberFox or  FibreCo Junior the panelmount connector is provided with a pigtail with the labels A and B on the corresponding fiber channel.

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