The CFP optical transceiver module is a standardized, hot-swappable optical transceiver used for high-speed data transmission in telecommunications and data center networks. The term “C form-factor pluggable” refers to the specific form factor and electrical interface of these modules, ensuring. Cisco offers a comprehensive range of pluggable optical modules in the Cisco® pluggables portfolio. Cisco offers a range of GBIC, SFP, XFP, SFP+, CXP, CFP, Cisco CPAK, and QSFP+ pluggable modules.