Step one: Visit http://www.giganews.com/line_info.html and post up the Traceroute the page shows, if you wish. Be aware that your non-bogan public IP Address will show up. It might shown up as the final hop (bottom-most line of the trace) might contain a hop with your IP address in it. Either remove that line or show only the first two octets. What I'm looking for is a line that mentions "ERX" in it's name towards the end. If for some reason the trace does not complete (two lines full of Stars), keep the trace route intact.
For example this what I saw when I was using Verizon
traceroute to 71.242.*.* (71.242.*.*), 30 hops max, 60 byte packets
1 gw1-g-vlan201.dca.giganews.com (220.127.116.11) 13 ms 13 ms 13 ms
2 ash-bb1-link.telia.net (18.104.22.168) 39 ms 7 ms 7 ms
3 TenGigE0-2-0-0.GW1.IAD8.ALTER.NET (22.214.171.124) 4 ms 4 ms GigabitEthernet2-0-0.GW8.IAD8.ALTER.NET (126.96.36.199) 4 ms
4 so-7-1-0-0.PHIL-CORE-RTR1.verizon-gni.net (188.8.131.52) 6 ms 6 ms 6 ms
5 P3-0-0.PHIL-DSL-RTR11.verizon-gni.net (184.108.40.206) 6 ms 6 ms 6 ms
6 static-71-242-*-*.phlapa.east.verizon.net (71.242.*.*) 32 ms 32 ms 33 ms
Step two: Can you provide the Transceiver Statistics from your modem?
#3 If you don't know how to get that info:
What is the brand and model of your modem?
#4 What is the model of the Netgear RJ-45 WAN port router?