GLC-LH-SMD (Cisco 1000BASE-LX/LH SFP Transceiver Module, 1310nm/10km/MMF-SMF/LC/DOM)

GLC-LH-SMD uses the Small Form-Factor Pluggable hardware format for Cisco network devices with modular Gigabit Ethernet slots and uplink bays. The module carries 1 Gbps electrical interface traffic through a supported Gigabit Ethernet host port connection during normal operation. Its optical path works with single-mode fiber and multimode fiber for the same LX/LH optic interface. The front interface uses a dual LC/PC connector pair for separated transmit and receive strands at the port face. The optical channel operates at a nominal 1310 nm wavelength across transmit and receive optical paths. The single-mode link budget reaches 10 km on G.652 fiber under the Cisco cabling specification for this optic. The operating temperature class is Extended for supported operating environments and approved Cisco platform deployments. Digital Optical Monitoring support provides DDM/DOM telemetry through the transceiver serial diagnostic interface for live module readings.

With FP transmitter technology, GLC-LH-SMD uses a Fabry-Perot optical source for LX/LH signaling over the transmit lane. PIN receiver type converts incoming optical energy through a photodiode receive path and electrical limiting circuitry inside the module. TX power range delivers -9.5 dBm to -3 dBm at the optical transmit interface under normal module operation. RX sensitivity reaches -20 dBm at the receiver input for the specified receive power floor in operation. Receiver overload point accepts -3 dBm as the maximum receive power boundary before optical input saturation. With 8b/10b encoding, the 1000BASE-X physical layer maps payload bits into balanced ten-bit transmission characters for serial transmission. IEEE 802.3z, IEEE 802.3ah, and SFF-8472 MSA govern Ethernet operation, optical compliance, diagnostic behavior, and monitoring interoperability. With 3.3V supply voltage, the module uses the standard SFP host power rail for transceiver electronics. At 1 W maximum power consumption, the module stays within the Cisco SFP port power profile during service.

Cisco Catalyst 2960, Catalyst 3560, Catalyst 3650, Catalyst 3750, Catalyst 4500, and Catalyst ESS9300 families accept this module. ASR 901, Integrated Services Router 11XX, ME 3600X, Nexus 30XX, Nexus 7000, and UCS 62XX platforms accept it. Enterprise campus wiring closets, aggregation layers, access switch uplinks, router handoffs, and lifecycle refresh projects deploy this Cisco optic. OS2 grade cabling serves structured plant builds that require standardized long-haul channel budgets and documented loss. GLC-LH-SMD is available from ORM Systems in new and certified refurbished condition for procurement teams. ORM Systems tests certified refurbished stock for physical condition, optical telemetry, transmit output, receive operation, and clean inventory serialization. Shop GLC-LH-SMD online from ORM Systems to check price, confirm stock, and place an order with account support. Request a bulk quotation from ORM Systems for enterprise and volume buyers with project pricing and procurement support.