Hello 3004Rainbow

                                   I understand that you are having slow speed and intermittent connection issue, but we just need to confirm whether it is happening on Wi-Fi or even with direct connection. If this is only on Wi-Fi you can try changing Wi-Fi channel on the modem interface or GUI and if this happening even on direct connection hardwired to the modem we need to check the cable signal level sent to the modem provided by your internet service provider to isolate the issue. Please follow the steps mentioned on the link below according to the issue.

                                http://arris.force.com/consumers/articles/General_FAQs/G34-G36-Changing-the-Wi-Fi-Channel

                                http://arris.force.com/consumers/articles/General_FAQs/G34-G36-Cable-Signal-Levels

Let us now know if this helps.

tough to know with that info. 

when it happens, get a screensnip of the cable connections page (shows upstream/downstream info) and the event lots. That helps to check the connection when its happening