Cisco GLC-LH-SMD: 1G Long-Range SFP Transceiver Module. It is specifically built for long-range, high-performance optical connections over single-mode fiber (SMF) at gigabit speeds. In summary, the Cisco GLC-LH-SMD is a high-quality, versatile transceiver module that enables long-distance Gigabit Ethernet connectivity over single-mode fiber.
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