A few scant references indicate that there is, or at least has been once upon a time, a flavor of symmetric DSL based on CAP modulation. However, this is basically all we know about SDSL/CAP. We have never seen any SDSL/CAP equipment with our own eyes, nor do we know of anyone providing SDSL/CAP services beyond hearsay. Needless to say, with such (ahmm) limited knowledge of the beast, we can't even think about supporting it.

On the fortunate side, perhaps the extreme scarcity of information about SDSL/CAP may be an indication that it's a long-extinct animal that we need not worry about.

If you know anything about SDSL/CAP and especially if you know of any SDSL/CAP lines still out there, please let us know.