Round Robin SIP Trunks

I have a SIP provider that is requesting I route calls round robin style to 6 different IP addresses. Is there a simple way to do this through TL already? Is it possible to bundle multiple trunks to use as a single trunk for the TL dialout macros? Assign multiple IP addresses to a single trunk? Some combination of dialout and queues? So far I'm just using a macro that fails over the multiple IPs rather than round robin.

Thanks,
Chris