The cellular MDA supports 4G LTE and 3G connectivity, depending on the radio module installed in the node. See the SAR-Hm and SAR-Hmc Chassis Installation Guide for the types of supported modules.
Each node supports a single cellular MDA. Each cellular MDA supports two cellular ports, one for each SIM that can be configured on the node. Each cellular port has its own PDN router interface. A PDN router interface is a network-facing interface that is used to route traffic to and from the node over a cellular network, providing WAN connectivity over the cellular port.