For a typical link, the cost of the optical module is about very expensive. Although the cost of single-mode fiber is cheaper than that of multi-mode fiber, the use of single-mode fiber requires a very expensive 1300nm optical module. The cost is about 2-3 times that of 850nm multi-mode optical module. In general, a multi-mode fiber The cost of the system is much lower than that of a single-mode fiber system.
When investing in optical fiber cabling, if you can consider increasing the initial investment of some cabling, using better multi-mode optical fiber, such as OM4 optical fiber, you can ensure that the current multi-mode optical fiber technology is fully utilized and the overall cost of the current system is reduced; When you need to upgrade to a higher speed system, such as 40G and 100G, OM4 can still be used and will save costs.
In short, when the transmission rate is greater than 1Gb/s, the use of multimode fiber is a good system choice. When the system requires a higher transmission rate, the following are our guiding principles for choosing OM4 fiber:
1. For Ethernet users, in 10Gb/s system transmission, the transmission distance can reach 300m to 600m; in 40Gb/s and 100Gb/s systems, the transmission distance is 100m to 125m.
2. For campus network users, OM4 fiber will support 4Gb/s fiber link length of 400m, 8Gb/s fiber link length of 200m or 16Gb/s fiber link length of 130m.
