10G BIDI SFP+ ZR+ 1550Tx 1490Rx 100km

Q: How to choose between SFP-10G-LRM and SFP-10G-LR 10 Gigabit Optical Modules?

A: The SFP-10G-LR 10 Gigabit optical module is suitable for long-range communications spanning up to 10 kilometers, ideal for interlinking buildings in vast campuses and establishing Metropolitan Area Networks (MANs). Besides multimode transmission, the SFP-10G-LRM 10 Gigabit optical module also supports single-mode transmission, where optical saturation does not occur, with a reach of up to 300 meters. Hence, for transmissions within 300 meters, the SFP-10G-LRM is a more economically viable and effective solution. For distances between 300 meters and 2 kilometers, the SFP-10G-LRM2 is a better fit than the SFP-10G-LR, as it is less expensive within the same transmission range. For ranges between 2 and 10 kilometers, the SFP-10G-LR is the preferred option.

Note: The SFP-10G-LRM2 has a maximum transmission distance of 2 kilometers over single-mode fiber, apt for short-range LAN connections.

Q: Can XFP optical modules be interconnected with SFP+ optical modules?

A: Since XFP optical modules and SFP+ optical modules share the same transmission rates (10Gbps) and wavelengths (compatible with 850nm/1310nm/1550nm), they can coexist within the same Ethernet network. This means that as long as the parameters match, XFP modules and SFP+ modules can be interconnected, for example, a 10G XFP module at 1310nm can be paired with a 10G SFP+ module operating at 1310nm. However, it’s crucial to note that XFP modules are not interchangeable with SFP+ modules.

Q: Can 10G SFP+ optical components operate on 1G SFP ports?

A: Can a 10Gb SFP+ operate at 1Gb speeds? The feasibility depends. You might need to throttle the rate of a 10G SFP+ transceiver on your switch, yet it’s a practice not commonly endorsed. Specifically, from an economic standpoint, if you possess a 1G switch and a 10G switch, connecting them with two 10G fiber transceiver modules yields what? A 1G network link! If a 10G port can accommodate a 1G module without performance loss, why not simply substitute the 10G module with a 1G module?

Figure 3: Connection between 10 Gigabit Switch SFP+ Port and Gigabit Switch SFP Port