Resources

Standard transceivers need two fiber strands per connection. BiDi (bidirectional) transceivers need just one. Here’s how that works and when it’s worth switching.

Single-mode and multi-mode transceivers aren’t interchangeable, and the fiber type isn’t a choice you make at the transceiver — it’s determined by what’s already installed. Here’s how to tell which you have.

SR, LR, ER, ZR — these two-letter codes on a transceiver’s name tell you exactly how far it can transmit. Here’s what each one actually means in real-world distance.

Compatible transceivers cost a fraction of OEM pricing, but the trust question comes up constantly. Here’s what actually determines whether a third-party module is safe to use.

Before you buy a transceiver, there are five questions worth answering first. This checklist walks through each one so you order the right part the first time.

SFP, SFP+, QSFP, and QSFP28 aren’t interchangeable. Here’s a clear breakdown of each transceiver form factor, what speed it supports, and how to pick the right one for your network.