The Cisco CFP2-100G-ER4 is a 100 Gbps optical transceiver manufactured by Cisco. It uses the CFP2 form factor and supports LC duplex connectors over single-mode fiber (SMF). Operating at a 1310 nm wavelength, it is designed for distances up to 40 kilometers with Digital Optical Monitoring (DOM) support.

This module complies with IEEE 802.3ba standards for extended reach Ethernet applications and operates on four CWDM channels across the O-band spectrum. Suitable for use in compatible network equipment featuring standard CFP2 ports, it enables high-capacity point-to-point links within carrier networks or large-scale data centers requiring long-range transmission capabilities.

Cisco CFP2-100G-ER4: 100GBASE-ER4 CFP2 Module for SMF (<40 km)