If your router is hosted in Equinix DC, you can use Equinix Cloud Exchange Fabric (or simply called ECX Fabric) to have a direct access to Microsoft services.
Azure ExpressRoute require redundancy at each peering location and this is mandatory. So when you placed the order for ECX fabric connection, Equinix will give you 2 physical circuits/cables. You don’t have to place the second order to get the redundant connections.
As shown above, in a single order Equinix will provide 2 circuits to your rack and you must use it in pair for primary and secondary connections.