That info is how to find out if you have interleaving switched on your line if you have a DG834(G) v1 +2, since it doesnt show up in the web interface on those routers.
The DG834G v3 and DG834GT has this information more accessible from the line stats
IIRC a non interleaved line will show as
Latency Type Fast or Fast Path
If you see "interleaved" then the line is obviously has interleaving applied.
Is this the information you were trying to find?