The ExpressPort QSFP+/QSFP interconnect system and the stacked combos are comprised of 38-position 0.8mm pitch SMT connectors, as well as press-fit cages intended for external connections. Each port offers 4 channels which increases port density and contributes to cost savings. The ExpressPort QSFP+ E-Series connector family is rated at 28 Gbps per channel. It features as tamped and formed contact design providing improved mechanical durability, an integrated grounding structure,and resonance dampening features for superior crosstalk performance. The contact design is optimized for a smooth impedance profile resulting in improved SI performance.