Cisco GLC-ZX-SMD is a 1000BASE-ZX SFP for Long-Reach Single-Mode Fiber. The 1000BASE-ZX SFP operates on standard single-mode fiber-optic link spans of up to approximately 70 km in length. The SFP provides an optical link budget of 21 dB, but the precise link span length depends on multiple factors such as fiber quality, number of splices, and connectors. When shorter distances of single-mode fiber (SMF) are used, it might be necessary to insert an inline optical attenuator in the link to avoid overloading the receiver. A 10-dB inline optical attenuator should be inserted between the fiber-optic cable plant and the receiving port on the SFP at each end of the link whenever the fiber-optic cable span loss is less than 8 dB. Product Details Figure 1 shows the GLC-ZX-SMD can be installed in the switch. Table 1 provides cabling specifications for the SFPs that you install in the Gigabit Ethernet port. Note that all SFP ports have LC-type connectors, and the minimum cable distance for all SFPs listed (multimode and single-mode fiber) is 6.5 feet (2 m). SFP Port Cabling Specifications Product Wavelength (nm) Fiber Type Core Size (μm) Modal Bandwidth (MHz* Km)*** Operating Distance (m) 1000BASE-SX 850 MMF 62.5 160 (FDDI-grade) 220 (722 ft) 62.5 200 (OM1) 275 (902 ft) 50 400 (400/400) 500 (1,640 ft) 50 500 (OM2) 550 (1,804 ft) 50 2000 (OM3) 1000 (3281 ft) 1000BASE-LX/LH 1310 MMF* 62.5 500 550 (1,804 ft) 50 400 550 (1,804 ft) 50 500 550 (1,804 ft) SMF -** - 10,000 (32,821 ft) 1000BASE-EX 1310 SMF -** - 40,000 (131,234 ft) 1000BASE-ZX 1550 SMF - - Approximately 70 km depending on link loss 1000BASE-BX-U 1310 SMF -** - 10,000 (32,821 ft) 1000BASE-BX-D 1490 SMF -** - 10,000 (32,821 ft) Note: *A mode-conditioning patch cord, as specified by the IEEE standard, is required regardless of the span length. Note how the mode conditioning patch cord for 62.5-μm fibers has a different specification from the mode-conditioning patch cord for 50-μm fibers. **ITU-T G.652 SMF as specified by the IEEE 802.3z standard. ***Specified at transmission wavelength.
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Cisco GLC-ZX-SMD is a 1000BASE-ZX SFP for Long-Reach Single-Mode Fiber. The 1000BASE-ZX SFP operates on standard single-mode fiber-optic link spans of up to approximately 70 km in length. The SFP...
The 1000BASE-LX/LH SFP operates on standard single-mode fiber-optic link spans of up to 10 km and up to 550 m on any multimode fibers. When used over legacy multimode fiber type, the transmitter...
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