Modular Port Concentrators (MPCs) with Modular Interface Cards (MICs) provide packet forwarding services and physical interfaces for MX routers. MICs install into MPCs and function similarly to PICs and FPCs. MPCs install vertically in the MX2020, MX2010, MX2008, and MX960 router chassis, and horizontally in the MX480 and MX240 router chassis. On MX5, MX10, MX40, MX80, and MX104 routers, MICs install directly into the router chassis. There are also fixed-configuration MPCs, with built-in network ports and services functionality