GLC-LH-SMD Overview
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 (μm)
|
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-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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