Single-mode fiber is also more reliable because the network has fewer connections or endpoints. And the cost savings are significant, too!Between 2008 and 2010, Rwanda laid over 3,000 km of national fiber backbone across all 30 districts, linking to SEACOM, EASSy and TEAMS in 2009, driving international bandwidth costs from about $3,000 per Mbps in 2006 to roughly $25 per Mbps. In 2013, Korea Telecom Rwanda Networks (KTRN) built a. A single mode SFP transceiver is an optical module that uses laser-based transmission over single mode fiber to deliver long-distance, high-speed data communication, typically at 1310nm or 1550nm wavelengths. While multimode fiber has a reach of several hundred meters, SMF has. Fiber optic cables represent the pinnacle of technology in modern telecommunications. There are two ways to achieve this.