I have Optimum Online and have a Black Motorola SBV5120 VoIP Cable modem and every week about twice a week it "restarts its self. all the lights on it go dark then they go on one by one. when they go on each one blinks for a couple of seconds then it stops blinkin and stays on then the next one blinks and turns on and so on and so on. When this happens i loose internet and phone. Is it suppose to do that or should i call optimum? thanks!