That's an interesting question that I don't really know the answer to, short of falling back on the generic "trust your network" sort of answer.
Also, I'm not suggesting that you cut out the phone interview all-together, just keep it short and be ready to schedule an in-person interview them as soon as possible, preferably while you have them on the line.
When I'm looking at a company, I'm trying to determine if they're a good fit for me just as much as they're trying to determine if I'm a good fit for them. A big part of this is showing me that you have the ability as a company to recognize talent and execute accordingly.