This line of SFP optics supports the following three data rates at various reaches: OC-3/STM-1 (155 Mbps), OC-12/STM-4 (622 Mbps), and OC-48/STM-16 (2,488 Gbps) (Table 1). A 155M SFP transceiver module is a low-speed optical module designed for 155Mbps (STM-1 / OC-3) transmission in SDH and SONET networks. Despite the dominance of Gigabit and 10G optics, 155M SFP modules are still actively purchased today —not as legacy leftovers, but as deliberate, cost-efficient. An SFP (Small Form-factor Pluggable) transceiver is a compact optical module designed for high-speed networking applications across enterprise, data center and telecom environments. OptoSpan Platinum OEM Series 2. Cisco® SFP optics for POS and ATM applications plug into a variety of SFP-based POS, TDM and ATM interfaces on Cisco router products. The definitions of optical parameters and reference points refer to ITU-T G. 1 optical. NETGEAR Compatible OC-48/STM-16 SFP BiDi Transceiver Module (SMF, 1550nm-TX/1310nm-RX, 15km, LC,DOM) The NETGEAR-compatible SFP transceiver provides up to 15km of 1000Base-BX throughput over single-mode fiber (SMF) using 1550nm-TX/1310nm-RX wavelengths via LC simplex connectors.