I don't know either. I have actually only used it for the mobile phone, but it works amazingly well for that. I fully expect the intercom to be up to the same standard. In any case, I will look into interoperability...otherwise the old fashioned way has worked for me also for the last 40 years.
Well, I just checked, and the Sena will work with other brands, but there is a limitation-a particular Sena can only be paired with ONE other non-Sena device. Here is some more info:
http://senabluetooth.com/universal_intercom/
We may be able to at least have some limited connectivity, but I have a feeling I'd better bring the manual to figure out how to make these work!