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- Description
- Specifications
The GLC-SX-MMD is a Cisco 1000BASE-SX SFP for gigabit Ethernet over multimode fiber. It transmits at 850 nm through a dual LC connector, follows the IEEE 802.3z 1000BASE-SX standard and supports digital optical monitoring, so a switch can read the module's optical levels.
Reach depends on the fiber behind it. Over 62.5 µm fiber the GLC-SX-MMD covers 220 m on FDDI-grade cable and 275 m on OM1. Over 50 µm fiber it covers 500 m on 400 MHz·km cable and 550 m on OM2, and it reaches 1000 m on OM3, OM4 and OM5. The minimum cable length is 2 m, and APC-polished patch cords are not supported, so use PC-polished LC cords. The module operates from -5°C to 85°C and typically draws up to 1 W per port.
Buyers moving to 10G can compare the SFP-10G-SR-S for multimode and the SFP-10G-LR-S for single-mode; more transceivers and UCS adapters are in the Cisco Interface Card category.
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| GLC-SX-MMD Specs | |
| Standard | IEEE 802.3z 1000BASE-SX |
| Wavelength | 850 nm |
| Fiber | Multimode only |
| Connector | Dual LC/PC |
| Reach, 62.5 µm OM1 | 275 m |
| Reach, 50 µm OM2 | 550 m |
| Reach, 50 µm OM3/OM4/OM5 | 1000 m |
| Minimum cable length | 2 m |
| Digital optical monitoring | Yes |
| Temperature range | -5°C to 85°C |