I get strange calls, mostly at night. The caller id may show 111 or 100 or sometimes a 1888 number or no numbers at all. Nobody on the line answers, but they hang up when I pick up the phone. Is someone hacking my voip? How can I set up the obi to stop these calls. I have read that there is a way to not accept calls unless they come from my sip provider (or something like that). Do I make changes on my router or the setup in the obi110. I am using freephoneline for my sip.
Also, I couldn't find where to set the RTP packet size that freehoneline recommends.
RTP Packet Size: 0.020
