G9925
G.992.5 refers to the ITU-T recommendation for ADSL2+, formally titled Asymmetric Digital Subscriber Line 2 Plus. It is an extension of the ADSL2 family (G.992.3/4) and is designed to provide higher data rates over existing copper telephone lines. The standard defines the physical layer, modulation, line coding, and management features needed to deliver broadband service using discrete multitone (DMT) modulation and existing copper pairs. It is specified to be backward compatible with earlier ADSL technologies, enabling mixed deployments and smoother upgrades in multi-vendor networks.
Key features of G.992.5 include the ability to achieve substantially higher downstream speeds compared to ADSL2,
In practice, G.992.5 has been widely deployed in residential and small-business broadband networks to deliver faster