Трансивер Cisco GLC-LH-SMD
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Cisco GLC-LH-SMD 1000BASE-LX/LH SFP is made for Both Multimode and Single-Mode Fibers.
The 1000BASE-LX/LH SFP, compatible with the IEEE 802.3z 1000BASE-LX standard, 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 should be coupled through a mode conditioning patch cable. 1300-nm wavelength, extended operating temperature range and DOM support, dual LC/PC connector.
This Figure shows the appearance of GLC-LH-SMD.
The table 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 (?m) | Modal Bandwidth (MHz* Km)*** | Operating Distance (m) |
| 1000BASE-SX (GLC-SX-MMD ) | 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 (GLC-LH-SMD) | 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 (GLC-ZX-SM ) (GLC-ZX-SMD ) | 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) |
*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-?m fibers has a different specification from the mode-conditioning patch cord for 50-?m fibers.
**ITU-T G.652 SMF as specified by the IEEE 802.3z standard.
***Specified at transmission wavelength.
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