I bought a used Optimum router from eBay and set it up, so that I won't have to pay the monthly fee. It's the exact same model as the one I got from Optimum. I have 2 issues:
1. I have the 15/5 plan. Most of the time, I average 18-19mbps down. However, sometimes I'll get 2mbps down. Additionally, my upload speeds are never 5mbps, rather averaging between 3 and 4.
2. It seems that the modem will sometimes randomly lose the connection for around 15 seconds. I saw it once, and all the LEDs were out. Today it happened 15 times. On Thursday and Friday afternoon and night and on Shabbos it didn't happen at all, but on Thursday and Friday morning it happened a few times.
Is the modem broken?