Cisco GLC-LH-SMD 1000BASE-LX/LH SFP Transceiver – 1310 nm Single-Mode LC, up to 10 km, with DOM
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Cisco
Cisco GLC-LH-SMD 1000BASE-LX/LH SFP Transceiver – 1310 nm Single-Mode LC, up to 10 km, with DOM
€791.85 inc. VAT
GLC-LH-SMD=
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Cisco GLC-LH-SMD – 1000BASE-LX/LH Gigabit SFP with DOM for Single-Mode and Multimode Fibre
1000BASE-LX/LH1310 nm10 km SMFDOM
The Cisco GLC-LH-SMD is a Gigabit Ethernet SFP transceiver for 1000BASE-LX/LH links of up to 10 km over single-mode fibre, or up to 550 m over multimode fibre with a mode-conditioning patch cord. It is the standard long-wavelength 1G optic for Cisco Catalyst access switches, ISR routers and industrial platforms that need to reach another building or a remote cabinet.
It includes digital optical monitoring (DOM) per SFF-8472, so the switch can report optical transmit and receive power, temperature, laser bias current and supply voltage — very useful when troubleshooting long fibre runs.
Before you order: On multimode fibre, Cisco requires an IEEE-specified mode-conditioning patch cord regardless of the span length — and a different cord type for 62.5 µm and 50 µm fibre. Without it the link may be unstable or not come up.
What's in the Box
- 1 × Cisco GLC-LH-SMD= 1000BASE-LX/LH SFP transceiver
- Dust plug on the optical port
- No fibre patch cords or mode-conditioning cords included
What It Means in Practice
- Single-mode: Gigabit link up to 10 km between buildings or to a remote cabinet.
- Multimode: up to 550 m, using mode-conditioning patch cords at both ends.
- DOM readings (Tx/Rx power, temperature) visible on the switch — handy for spotting dirty connectors or excessive loss.
- Extended temperature rating (−5 to 85 °C) for wiring closets and cabinets.
What Will Not Work
- Runs at 1 Gbit/s only — will not link to a 10G optic or a 100 Mb SFP.
- Will not work on multimode fibre without mode-conditioning patch cords.
- Not for runs beyond 10 km on single-mode fibre.
- Requires an SFP port that supports 1000BASE-X — some 10G-only SFP+ ports do not accept 1G optics.
Key Features
10 km single-mode
1000BASE-LX/LH at 1310 nm over G.652 single-mode fibre.
Multimode capable
550 m on 62.5 µm and 50 µm multimode with mode-conditioning cords.
Digital optical monitoring
DOM per SFF-8472: power, temperature, bias, voltage.
Extended temperature
EXT range −5 to 85 °C.
Technical Specifications
Frequently Asked Questions
Singular Expert Insight · Buyer's Guide
GLC-LH-SMD is the safe default for Gigabit fibre between buildings: one optic covers single-mode up to 10 km and, with the right cords, older multimode runs. The DOM readings are worth using — logging Rx power at install time gives you a baseline when a link degrades years later. Need the switch at the other end? Browse our switches.
✓ Buy it if you need a Gigabit fibre link up to 10 km on single-mode, or up to 550 m on existing multimode with conditioning cords, on a Cisco SFP port.
✕ Skip it if you need 10G (choose SFP-10G-LR or SR) or the run is short multimode (GLC-SX-MMD is simpler).
→ Also consider Cisco GLC-SX-MMD= for short multimode Gigabit links and GLC-SX-MM-RGD= for industrial temperature ranges.
Send us the fibre type, distance and switch model and we will confirm the optic and any patch cords needed.
Features - Cisco - GLC-LH-SMD=
More Details
Product Code
677P577
EAN Code
0882658340901
Manufacturer
Cisco