Sa pagkaalam ko most DSL based routers are hard-wired to 12mbps max downlink speed ...
ANSI T1.413 Issue 2, up to 8 Mbit/s and 1 Mbit/s
G.dmt, ITU-T G.992.1, up to 10 Mbit/s and 1 Mbit/s
G.lite, ITU-T G.992.2, more noise and attenuation resistant than G.dmt, up to 1,536 kbit/s and 512 kbit/s
Asymmetric digital subscriber line 2 (ADSL2), ITU-T G.992.3, up to 12 Mbit/s and 3.5 Mbit/s
Asymmetric digital subscriber line 2 plus (ADSL2+), ITU-T G.992.5, up to 24 Mbit/s and 3.5 Mbit/s
Very-high-bit-rate digital subscriber line (VDSL), ITU-T G.993.1, up to 52 Mbit/s and 16 Mbit/s
Very-high-bit-rate digital subscriber line 2 (VDSL2), ITU-T G.993.2, an improved version of VDSL, compatible with ADSL2+, sum of both directions up to 200 Mbit/s. G.vector crosstalk cancelling feature (ITU-T G.993.5) can be used to increase range at a given bitrate, e.g. 100 Mbit/s at up to 500 meters.[23]
G.fast, ITU-T G.9700 and G.9701,[24] up to approximately 1 Gbit/s aggregate uplink and downlink at 100m.[25] Approved in December 2014, deployments planned for 2016.[26][27]
You may want to consider a newer ROUTER brand and model ..