Can I have multiple SIP providers?

Our company has just expanded into the Orlando area. Our current SIP provider who also provides our T1 connection does not offer service in Orlando. I have spoken to a company (Voxitas) that provides service in the Orlando area as well as Atlanta. They are unable to compete with out current provider on the T1, but said we could use them for our SIP over the current T1. So my question is (finally), Can I set up service with Voxitas, set up a second trunk for them, use that trunk for the Orlando numbers, and keep the current numbers on the current trunk?