I think you've read part of the data - the maximum attainable speeds, but not the actual sync speeds (which are probably 39999 and 10000).
Once unlocked, you can get the simple set of stats by either:
a) Using the command line:
- Use "telnet 192.168.x.x" (using the IP address you gave the modem)
- Login using a userid of admin and password of admin
- When presented with the "ATP>" prompt, type "sh"
- When presented with the "#" prompt, type one of these commands:
"xdslcmd info --pbParams"
"xdslcmd info --show"
"xdslcmd info --stats"
The second command helps show how the modem has sync'ed with the cabinet. The last command helps show how the modem has encountered errors recently.
b) Using the browser GUI
- Put the IP address into the browser's address bar
- Login using "admin" as userid and "admin" as password
- Click on "WAN" (under "Status")
- Click on the "xDSL" tab
- View statistics. Note that the CRC, FEC and HEC counts are not consistent with the values that come from the command-line.
Either of these will give you a snapshot of the modem status.
However, @BaldEagle1's scripts are rather useful to show how these values change over time,