Perhaps someone who has had success with the SR731 Smart Repeater will jump in and explain their setup!
My SR731 doesn't seem to work at all with my CM15A. As others have stated, the AHP Activity Monitor doesn't even show anything. This is even when I use the "test button" on the SR731, which generates a M1 "on" and M1 'off'.
No M1 'on' nor M1 'off' shows up in the AHP Activity Monitor.
IMHO, the CM15A is not compatible with the SR731. Possibly because the SR731 "tags" its repeated RF signals, as repeats, and the CM15A "sees" these tags as making the RF signal invalid (and therefore ignores them). Though, that is just a guess.
Let me add that the latest CM15A/AHP "package" being sold by X10 on their website, includes the Smart RF Repeater. I wonder how they could do that. Has AHP been updated lately, such that it how works?