On your dashboard, set
voip.ms as your default for outgoing calls. As a default,
voip.ms will handle all outgoing calls. If you want to use GV to place a call you will prepend the number to designate the SP where you have google voice set up.
IE: if you have google voice on SP1 you will dial **1 number.
for SP2 dial **2
for SP3 dial **3 (obi202 & 302 only)
for SP4 dial **4 (obi202 & 302 only)
for the line dial **8 (obi110 only)
for Obitalk Service dial **9 (only to call other Obi endpoints)