Seperate incomming and outgoing services

Would it be possible and relatively easy to setup say freedigits.com for incomming calls and voipcheap.com for outgoing calls?

I want to setup an asterisk box without using a copper line phone. I have cell phone for 911 so I just want a cheap home phone for basic calling

Yes, just defines two peers in sip.conf, one for freedigits.com and one for voipcheap.com.

Cheers.

Marco Bruni