Log into your router and goto system monitoring and click advance. See if your dropping your connection. Maybe you need your ONT replaced.
From Garland Texas
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\Phillips>tracert 208.67.222.222
Tracing route to resolver1.opendns.com [208.67.222.222]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms Wireless_Broadband_Router.home [192.168.1.1]
2 8 ms 5 ms 9 ms L100.DLLSTX-VFTTP-51.verizon-gni.net [173.71.58.
1]
3 12 ms 12 ms 12 ms G0-3-4-0.DLLSTX-LCR-21.verizon-gni.net [130.81.2
12.36]
4 10 ms 9 ms 9 ms so-5-0-0-0.DFW9-BB-RTR1.verizon-gni.net [130.81.
199.34]
5 8 ms 9 ms 9 ms 0.xe-3-2-0.BR2.DFW13.ALTER.NET [152.63.100.1]
6 11 ms 10 ms 15 ms 204.255.168.158
7 13 ms 11 ms 13 ms ae-3.r01.dllstx04.us.bb.gin.ntt.net [129.250.2.2
09]
8 8 ms 9 ms 10 ms xe-0-0-0-17.r01.dllstx04.us.ce.gin.ntt.net [157.
238.224.198]
9 10 ms 10 ms 9 ms resolver1.opendns.com [208.67.222.222]
Trace complete.
I have two splitters and over 60 foot of coax running to my router.