When you get a chance, post up some stats from the router's web interface so we can see if it agrees with the ST330 you were using.
When you're in the web interface go to Broadband Connection -> DSL Connection -> Details and paste what it says there.
This is what I get:
Uptime: 0 days, 9:20:24
Modulation: G.992.1 annex A
Bandwidth (Up/Down) [kbps/kbps]: 448 / 6,144
Data Transferred (Sent/Received) [MB/MB]: 7.82 / 71.80
Output Power (Up/Down) [dBm]: 11.5 / 19.5
Line Attenuation (Up/Down) [dB]: 14.0 / 25.0
SN Margin (Up/Down) [dB]: 19.0 / 23.5
Vendor ID (Local/Remote): TMMB / GSPN
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 0 / 0
FEC Errors (Up/Down): 0 / 0
CRC Errors (Up/Down): 0 / 0
HEC Errors (Up/Down): 0 / 0