basin-the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet; flood control in the Missouri basin.
from the milkfish sip software side you can see check all active sip relevant settings in the web interface and or on the linux shell text console by browsing the status page or executing milkfish services status on the shell respectively
you could use iax on some vsps which works a lot better with nat than sip but not a lot of vsps support iax good luck dump the milkfish i had trunks to maxotel and pennytel working fine thru the milkfish on a dd wrt flashed router when using the softphones directly with the vsp s