GLC-LH-SMD – 1000BASE-LX/LH SFP – 10km SMF / 550m MMF – DOM
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GLC-LH-SMD Description
The GLC-LH-SMD is a Cisco 1000BASE-LX/LH SFP transceiver for 1G links of up to 10 km over G.652 single-mode fiber or 550 m over multimode fiber. The module transmits at 1310 nm on dual LC/PC connectors, allows 6 dB of channel insertion loss on single-mode fiber and operates from -5 to 85°C with DOM support. Multimode links need a mode-conditioning patch cord.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
GLC-LH-SMD |
|
Product type |
1000BASE-LX/LH SFP transceiver |
|
Data rate |
1 Gigabit Ethernet |
|
Interface standard |
IEEE 802.3z 1000BASE-LX |
|
Fiber type |
Single-mode fiber and multimode fiber |
|
Wavelength |
1310 nm |
|
Operating distance |
Up to 10,000 m over G.652 SMF or 550 m over MMF |
|
Connector type |
Dual LC/PC |
|
DOM support |
Yes |
|
Temperature range |
Extended temperature range -5 to 85 C |
|
Cisco ordering description |
1000BASE-LX/LH long-wavelength with DOM |
Application Scenarios
Between two buildings on a campus, the module carries a Gigabit Ethernet uplink between SFP ports over G.652 single-mode fiber at spans of up to 10 km.
In a building cabled with older multimode fiber, the module can run a Gigabit link of up to 550 m when it is coupled through a mode-conditioning patch cord.
Product Comparison
|
Parameter |
GLC-LH-SMD | ||
|---|---|---|---|
|
Operating distance |
10,000 m over G.652 SMF; 550 m over MMF |
220 m to 1000 m depending on MMF type |
40,000 m over G.652 SMF |
|
Fiber type |
Single-mode fiber and multimode fiber |
Multimode fiber |
Single-mode fiber |
|
Connector type |
Dual LC/PC |
Dual LC/PC |
Dual LC/PC |
|
Wavelength |
1310 nm |
850 nm |
1310 nm |
|
Maximum channel insertion loss |
6 dB on G.652 SMF; 2.4 dB on any MMF |
2.4 dB to 5 dB depending on MMF type |
18 dB over G.652 SMF |
|
Operating temperature |
-5 to 85 C |
-5 to 85 C |
-5 to 85 C |
GLC-LH-SMD is the only module in this group that runs over both single-mode and multimode fiber at 1310 nm: it reaches 10,000 m over G.652 SMF with 6 dB of allowed channel insertion loss, or 550 m over MMF with 2.4 dB. Multimode-only plants at 850 nm, 220 m to 1000 m depending on MMF type, go to GLC-SX-MMD, which cannot use single-mode fiber. Single-mode spans longer than 10 km, up to 40,000 m with 18 dB of allowed loss, need GLC-EX-SMD, which has no multimode support. Sites that see temperatures below -5 C can replace GLC-LH-SMD with GLC-LX-SM-RGD, which has the same optical figures in the industrial -40 to 85 C range.
Ordering Checklist
- Multimode patch cord: Add a mode-conditioning patch cord for every multimode link. IEEE specifications require it at all times when LX/LH runs over multimode fiber.
- Host support: Confirm the target switch or router model and its SFP port appear on the Transceiver Modules Compatibility list for GLC-LH-SMD. A host can reject an optic that fits the cage but is not on its supported list.
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | GLC-LH-SMD | Product type | 1000BASE-LX/LH SFP transceiver |
| Cisco ordering description | 1000BASE-LX/LH long-wavelength with DOM | Data rate | 1 Gigabit Ethernet |
| Interface standard | IEEE 802.3z 1000BASE-LX | Fiber type | Single-mode fiber and multimode fiber |
| SMF reference | ITU-T G.652 SMF | Wavelength | 1310 nm |
| Wavelength range | 1270 to 1355 nm | SMF operating distance | 10,000 m over G.652 SMF |
| MMF operating distance | 550 m | Maximum channel insertion loss | 2.4 dB on any MMF; 6 dB on G.652 SMF |
| Transmit power range | -3 to -9.5 dBm | Receive power range | -3 to -20 dBm |
| Connector type | Dual LC/PC | Patch-cord rule | PC or UPC connectors supported; APC connectors not supported |
| MMF patch-cord note | Mode-conditioning patch cord required on MMF | DOM support | Yes |
| Temperature rating | EXT | Operating temperature | -5 to 85 C |
| Storage temperature | -40 to 85 C | Minimum cable distance | 2 m |
| Typical SFP power consumption | Up to 1 W per SFP port | Module dimensions | 8.5 x 13.4 x 56.5 mm |
| Module weight | 75 g or less | Laser safety | Class I |
Quality Certifications
Customer Reviews
Questions & Answers
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How far can GLC-LH-SMD reach over single-mode and multimode fiber?
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What is the operating temperature range of GLC-LH-SMD?
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What is the spare part number for GLC-LH-SMD?
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What transmit and receive wavelength window does GLC-LH-SMD use?
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Is a mode-conditioning patch cord required for GLC-LH-SMD on multimode fiber?
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Does GLC-LH-SMD have DOM and what temperature range does it operate in?
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