Juniper Networks - Expansion module - 40 Gigabit QSFP+ x 4

The QFX-EM-4Q port can also be configured as either access ports or as uplinks. Expansion Module with data networking application/usage for maximum dependability and convenience Hot-swappable form factor for your convenience and simplicity of usage With 40GBase-X technology, enjoy up to 40Gbps data transfer rate over supported network cable 40Gigabit Ethernet - Designed to provide high-performance Ethernet connection while minimizing power and CPU cycles utilization Supports optical fiber cable for durable performance, minimal signal loss, and fast data transfers to greater distances Expansion Module is the single answer to all your desired and specified application execution and expansion needs