as the title says calls drop after around 15 min .....i have tried everything from swapped obi devices changed routers, latest obi firmware,try dmz zone , port forwarding,static ip for the obi, google dns etc etc. both my Fios g1100 gateway and now my 2 yr old Tenda routers have NO SIP-ALG settings thats the only thing left that the google keeps mentioning BUT i wanted to ask here before i go try a another router. yes the Tenda is an AC15 router that i had in a closet un used Not the Best BUT getting close to 100mps via wifi so seems solid.
any ideas