EN7516 - VDSL2/35b/ADSL2+ High Performance Dual-Band Wi-Fi VoIP Gateway
The EN7516 is a highly integrated VDSL2 35b/17a, ADSL2+ system-on-chip processor for xDSL router/gateway plus Wi-Fi 4/5/6 applications.
It features dual-core CPU 900MHz, integrated Ethernet switch and multi-port gigabit PHYs, RGMII, USB3.0/2.0, PCIe, and multi-line VoIP support.
Equipped with high throughput networking engine, Smart Packet Accelerator (SPA), EN7516 enables low-power, low-latency, and wire-speed performance with fully CPU offload.
Probably a lot of closed source proprietary stuff, but if you request the GPL source you'd have a better idea.