I have an spa 3102 installed in the Philippines. It works fine but the only problem is the unit is intermitent in the sense that after a call is established (VOIP-to PSTN) and both parties hang up, there are instances when the unit does not go in ready mode (phone led does not lit) and when you try to call the unit. it does not ring and I get a voice mail greeting from the service provider instead. I have to wait around 15 minutes before I could access the unit again. Any solution to these problem? Thanks.