Knowledge

Patch cord and adapter specifications are written at 0.2dB, but it is not uncommon to measure 0.6dB in the field. This article explains the zeroing steps, determination thresholds, sampling ratios, and link ledgers for the receiver to use a stable light source and an optical power meter to conduct spot testing of insertion loss.

The instrument cannot detect the pull tabs that were bent during transportation and the gold fingers that were darkened by moisture. This article gives the appearance sampling inspection points of optical modules, optical fiber transceivers and optical transceivers, the three-level treatment method for unqualified products, and the reasonable proportion of appearance sampling.

The annual frame price is low but inventory must be kept down. Ordering in batches is flexible but there is a fear of supply interruption. This article provides a method for judging order placement based on usage curve, material preparation cycle and risk exposure, and explains how to reserve spare parts pool capacity.

There are obvious price differences for the same model in different channels, and most of them are not simply a matter of discounts. This article sorts out four common caliber differences and teaches buyers to restore the conditions before judging whether the prices are comparable during the price comparison stage.

It is only easier to choose the plan that is more expensive than the unit price. This article provides the five-part expenditure structure and table-filling method of the total cost of ownership, allowing procurement to convert spare parts, operation and maintenance hours, downtime losses and life into the same comparison table.

Just because a single sample passes the test does not mean there are no problems in the batch. This article explains the sample size, observation cycle, judgment and rectification closed loop of small batch trial assembly from the perspective of procurement and integrators, helping to release risks before placing orders.

When the model you have is out of stock or you need to reduce the cost, whether you can replace it with another model cannot just rely on similar model names. This article provides three checkpoints for alternative model determination and a method for retaining the determination form for purchasers and integrators to make model replacement decisions.

For the same parameter list, engineers look at the indicators, and purchasing depends on whether the fields are complete and the caliber is consistent. This article gives a three-step verification sequence from a procurement perspective to help turn the parameter table into a comparable and acceptable procurement basis.

Customs declarations have been returned and air shipments have been rejected. Most of the problems arise from incomplete declaration elements and failure to confirm the accompanying materials in advance. This article sorts out the fields that need to be clearly stated in the export declaration, the processing thresholds for wooden packaging and battery-attached items, and the scheduling differences between sea and air shipments.

Relying on guessing when troubleshooting problems due to jet lag will only drag the problem into an overnight battle. This article gives four sets of data that must be obtained first for remote demarcation: port optical power, error count and negotiation status, the condition of the optical path itself, and the model and code type of the opposite end module.