The ADTRAN SDX 631qv is a member of the SDX 630 Series XGS-PON ONTs providing a 2.5GbE UNI and integrated VoIP (1x FXS) for residential deployments. The series supports zero-touch provisioning, SDN integration, advanced operational monitoring (Y.1731), and multigigabit LAN interfaces. This variant is listed as SDX 631qv — Part No. 1287937F1 (NA).