Here's my setup:
Freephoneline.ca (with SIP unlock key)
DIR-855L router
Obi202 behind the router (Obi is in the router's DMZ, ports are forwarded).
Phone plugged into Phone1 port (tried two different phones, same problem).
The last couple of days, whenever I get an incoming call, the phone just won't ring. The call does show up in the Obi's call history. If I pick up the phone, the connection works fine. All that is missing is the actual ring.
Is there anything I can check?