CFP2 100G ER4 Transceiver Juniper Networks 100GBASE-ER4 | Enterprise Optics

Keep 100 GbE transport stable across longer fiber runs with the Juniper CFP2 100G ER4 transceiver. Designed for environments where reach and signal integrity matter, this module supports long-distance Ethernet links without forcing a redesign of the network core. It fits naturally into backbone, aggregation, and interconnect roles where consistent optical performance is worth more than a lower-cost short-reach part. The CFP2 form factor gives infrastructure teams a familiar path for high-density deployments, while the ER4 optical design is suited to single-mode fiber applications that demand more reach than standard short-reach optics can provide. That makes it a practical choice for connecting buildings, extending campus networks, or carrying traffic between distributed network rooms. For teams standardizing on Juniper optics, this module helps preserve platform alignment and simplifies procurement for production links that cannot tolerate compromise. It is the kind of transceiver selected when the cost of an unstable connection is higher than the price difference between commodity optics and a properly specified long-reach module.