Junos OS supports Junos Multi-Access User Plane, a software solution that turns your device into a high-capacity user plane function called a System Architecture Evolution Gateway-User Plane (SAEGW-U). This MX SAEGW-U interoperates with a third-party SAEGW-C (control plane function), per 3GPP Release 14 Control User Plane Separation (CUPS) architecture, to provide high-throughput 4G and 5G fixed-wireless access service with support for 5G non-stand-alone (NSA) mode. CUPS enables independent scaling of the user and control planes, network architecture flexibility, operational flexibility, and an easier migration path from 4G to 5G services. The CUPS architecture is optional for 4G but inherent in 5G architecture.