I have used an Insteon 2450 I/OLinc with an added X10 address to send X10 On and Off power line commands.
Worked fine on an ELK Doorbell Sensor that also can trigger a Powerflash.
Few differences.
It also has a internal relay that can also have an X10 address added to it.
It can only use dry contacts for a trigger.
Only does On and Off commands. No optional things like flashing lights or triggering Powerhorns.