I'm assuming that you have one physical line (PSTN = Public Switched Telephone Network, e.g. British Telecom or Virgin) and you have added one VOIP line (Voice Over Internet Protocol, e.g.
Sipgate.co.uk) to give you a second line.
The OBi110 is a terminating and bridging device that can accept the above two plus the OBiTALK network and other providers. Now you have to decide how you wish to use your OBi110. The "Primary Line" is that line which numbers do not require any ** code to select. If your Primary Line is PSTN and you dial 0800500005, then that number will go to your physical line. To route it via your VOIP line you would have to dial **10800500005. You can choose which service is to be your Primary Line. If you choose sipgate, then calls with no ** code will route via that route and you have to dial **8 to send calls vial your physical line.
The FAQ section can be found down the left side of the screen from your Dashboard. The recommended port forwarding is:
TCP Ports: 6800, 5222, 5223
UDP Ports: 5060, 5061, 10000 to 11000, 16600 to 16998, 19305
The ports 16600 to 16998 are the ones concerned with speech, so I'm guessing that's what gave you your one way transmission problem. Putting the OBi110 in your router's DMZ simply port forwards all the ports to the local IP address where the OBi110 is located. It's a useful test, but not recommended to leave it there. Personally, I have found that
sipgate.co.uk works better without STUN.
