Cisco CPAK-100G-PSM4= 100G CPAK PSM4 500 m

Carry 100G traffic across short-reach single-mode fiber with this Cisco CPAK PSM4 optical transceiver module. The parallel optics design is built for 500 m SMF links, making it a practical fit for data center interconnects, campus backbones, and aggregation paths that need high bandwidth without moving to a longer-reach transport platform. For infrastructure teams, the value is in matching the optics to the job. PSM4 is designed for parallel transmission over single-mode fiber, which helps preserve a clean architecture for short-reach 100G deployments. Cisco compatibility also matters when standardizing on a known platform across switching and routing estates. This module is a strong option when the requirement is not maximum distance, but dependable 100G performance in a controlled reach envelope. It supports procurement decisions where platform consistency, fiber planning, and cost discipline all need to align. The verified source data confirms the CPAK form factor, PSM4 design, 500 m SMF reach, and parallel optical architecture.