At a condo in FL, we have a Motorola 63443 modem/router that we have and our ISP is Comcast. The system was working fine until recently. Now, several times a day, we lose our connection. I can restore the connection by unscrewing the cable in the back of the Motorola unit, pausing for about 15 seconds and rescrewing it back in. This was the recommended fix by a Comcast associate. I am wondering if my modem/router is causing the problem or if this is a Comcast issue. Is there a way I can test the Motorola unit? If I have Comcast come here, they are likely to charge a "fat" service charge if the problem is mine. Any suggestions or recommendations? Any help is appreciated. Thanks.