Thanks for the advice, I don't think I made myself clear. The vonage line plugged into the line port has a UK number, all UK numbers start with a 0.
Rather than selecting one line over another I would like my obitalk box to know that if the phone number starts with a zero it dials out on the line port otherwise it uses the google voice attached to SP1.
Can that be done with an obitalk without prefixing anything ?
Thanks,
Andrew