Knowledge

Explain the geometric differences and return loss ranges of PC, UPC, and APC end face grinding, explain why CATV and single-fiber wavelength division are more suitable for APC, and the damage to end faces and adapters that may be caused by mixed insertion of the two.

From connector size, snapping method to typical insertion loss, the system compares the differences between the four fiber optic connectors, LC, SC, FC, and ST, to help you choose the right connector based on port density and vibration environment, rather than just looking at the interface name.

Most mismatches of high-speed cables can be seen during the arrival process. This article gives a check sequence that can be followed: mouth shape, speed, length, appearance and random testing on the machine, and direction verification covering branch specifications.

The AOC looks like a network cable, but is actually a section of prefabricated optical cable connected to two optical engines. If it is forcedly pulled using a copper cable, the entire cable is often scrapped. This article talks about laying stress, excess length coiling and plugging and unplugging marking habits.

In high-density cabinets, the temperature rise of high-speed cable body stacking and connectors at both ends will be superimposed on the air inlet. This article gives solutions to wiring in the cabinet from three aspects: heat source, air duct obstruction and temperature margin.

When two switches are combined into one using one cable, the bandwidth and cable length of the stack port are not aligned with the master-slave logic, and it is easy for link connectivity but switching exceptions to occur. This article provides the key points for stacking cable selection and online drills.

Many of the faults of high-speed cables are not caused by the link itself, but by being hard-folded, strangled by cable ties, or pressed by cabinet doors when put on the shelf. This article talks about the difference in wire diameter, the empirical value of the minimum bending radius and the practice of deep cabinet positioning.

The same DAC high-speed cable can be used at 1 meter, which does not mean that it can be used at 5 meters. This article breaks down the conventional length gears according to the speed, where the attenuation comes from, and the two alternative paths after crossing the boundary.

Box-type optical transceivers hanging loosely in weak current rooms are difficult to inspect and troubleshoot. This article provides implementation methods for the three elements of centralized shelving, power supply and cooling, labeling, and inspection tables, so that operation and maintenance can see the status.

Whether the link can be stable in the long term depends on budget rather than luck. This article disassembles the losses item by item according to connectors, splice points and jumpers, and provides the landing method of 3 dB margin and short link overload treatment.