The Preseem 20000 hardware platform is capable of intersecting 20 Gbps of traffic via one or more pairs of 10G SFP+ links or 40G QSFP+ links.
The Preseem 20000B has four 10G (SFP+) ports to enable intersecting up to two 10G links.
The Preseem 20000C adds optical bypass capabilities to the Preseem 20000B platform.
The Preseem 20000E has two 40G (QSFP+) ports which enable intersecting a 40G link.
The Preseem 20000F has four 10G (SFP+) and two 40G (QSFP+) ports.