I am using a free softphone voip provider and after seconds of a call the calls is dropped, I've opened up the following ports that the softphone uses but I still receive 30 second dropped calls, My ata voip adapter has no issues on the router board.
/ip firewall nat add chain=dstnat dst-address=*.*.*.* protocol=tcp dst-port=13000 \
action=dst-nat to-addresses=192.168.88.180 to-ports=13000
/ip firewall nat add chain=dstnat dst-address=*.*.*.* protocol=tcp dst-port=6060 \
action=dst-nat to-addresses=192.168.88.180 to-ports=6060
Thanks for your help.