When setting up a wiring project, it is often asked whether the menu mode is multi-mode or multi-mode.The wrong choice is either to double the optical module budget, or the link will not last for two or three years of upgrades.This article clarifies the applicable boundaries of OS2, OM3, and OM4, so as to facilitate one-time finalization at the
design stage. Look at the three variables of distance,
rate, and budget first. The advantage of multimode is that the supporting optical modules are cheap: OM3 can usually reach about 300 meters and OM4 about 400 meters under 10 megabytes; to 100g short-range scenarios, the transmission distance will be compressed to less than 200 meters.Single-mode OS2 has almost no bottlenecks from a few hundred meters to tens of kilometers. If the link exceeds the multimode boundary or reserves space for high-speed upgrades, it will be directly put on single-mode
to avoid the whole link
- being pushed back and forth in a few years. Commoncollocations in engineering Inter-building backbone and campus
- backbone: OS2 optical cable with LC-LC single-mode dual-core jumper Short-rangeinterconnection in the machine room: OM3/OM4 with LC-LC 10 GigabitMultimode OM3 Dual Core
- Jumper, Lower Optical Costs Security and horizontal link: OS2-based, with single-fiber bidirectional transceiver fiber-saving core Machine
- room cross jump and easy rat bite section: use armored jumper to strengthen
protection Don't ignore connector grinding and compatibility
When upgrading from low-grade multimode to OM3/OM4, the jumper and adapter are usually replaced in groups, and the mixing level makes it difficult to converge the insertion loss.Single-mode LC/SC ports are mostly UPC grinding and cannot be mixed with APC ports. The color and grinding grade are checked once per port when ordering, which is much cheaper than reworking on site. In a nutshell: The link with unknown
length or rate to be upgraded is distributed according to the OS2 single-mode trunk. The computer room confirms that the short-range scenario is multi-mode, and it is recommended to leave a 3dB margin in the loss budget.The EB-LINK jumper product line covers the above grades and common lengths, and can be shipped after testing only according to the port table.