#1 Visit http://www.giganews.com/line_info.html and post up the Traceroute the page shows, if you wish. Be aware that the final hop (bottom-most line of the trace) will contain a hop with your IP address in it. Remove that line. 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.
#2 Please provide the Transceiver Statistics from you modem.
To do so, I believe this is what you need to know...
Sad to say, you modem does NOT....
#1 Support telnet/SSH.
#2 OR support SNMP.
#3 OR support FTP.
#4 Has no web based UI. 
-- Pre setup directions, regardless of what other equipment you have. This assumes that you have a Windows Computer.
#1 I sent you a private message that points to the tool that is required.
#2 Do not install it at this time.
#3 Make sure that you know how to setup a Static IP on your computer.
a) At http://portforward.com/networking/staticip.htm there is some guides.
b) If your computer has at least two NICs, be sure to which NIC is which.
-- End pre setup - regardless of what other equipment you have. For a Windows Computer.
#4 If you have a RJ-45 WAN port router, most likely it has a built in switch in it.
#5 If you have a hub/switch that is not part of a router, this what you do - Otherwise, skip down to (what to do without a hub/switch - not part of a router).
#6 Make that hub/switch is only connected to a power supply at this stage.
#7 Disconnect the wire from the Westell at the your RJ-45 WAN port router end.
#8 That wire, if I understand things correctly, goes to the port next to the uplink port of that hub/switch
#9 Connect another wire from the your RJ-45 WAN port router's WAN/Internet/To Modem port.
#10 The other end of the wire that is connected to the your RJ-45 WAN port router's WAN/Internet/To Modem port, connects to any other port the hub/switch but not the uplink port or the port in use by the modem.
#11 Make sure your computer(s) behind the your RJ-45 WAN port router router can still access the net.
#12 One of the reasons that I said that in step 11, is because maybe I made a mistake in step 8 - it is not the port next to the uplink port, it is the uplink port.
-- End pre setup, if you have a hub/switch that is not part of a router.
#13 Disconnect your computer from behind the your RJ-45 WAN port router router.
#14 Setup a Static that is not in the same subnet as your RJ-45 WAN port route that wired NIC.
For example if the RJ-45 WAN port router's LAN IP is 192.168.1.1, then on that wired NIC...
IP Address: 192.168.2.1
Subnet Mask: 255.255.255.0
#15 As addressed in http://www.dslreports.com/faq/7267
For security precautions, unbind File and Print Sharing and the Client for Microsoft Networks from the second NIC.
#16 If you don't have at least two NICs, well disable that for that NIC.
#17 Connect that wired NIC to any other port of the hub/switch but not the uplink port, port next to the uplink port OR the port in use by the your RJ-45 WAN port router's WAN/Intenet/ To Modem Port.
#18 Now Install the tool that I sent you a link to.
#19
Once installed, don't forget to use ** CTRL-ALT-F7 ** to reveal several "hidden" tabs, the signal levels and error counters, so forth.
#20 In the tool go to DSL tab.
#21 If your computer has two NICs, please post the info from there.
#22 If your computer only has one NIC:
a) Copy down the info from there.
b) Disconnect the computer from behind the hub/switch that is between the Westell modem and the your RJ-45 WAN port router router.
c) Connect the computer to one of the your RJ-45 WAN port router's LAN ports.
d) Change the NIC to use DHCP.
e) Then post the info that you got from there....
---- End directions if you have a hub/switch that is not part of a router.
If you don't have a hub/switch that is not part of a router, consider buying one. A cheapo 4-port hub/switch will do.
What to do without a hub/switch - not part of a router and assuming that you don't want to buy one. 
#6 Disconnect the wire from the Westell at the your RJ-45 WAN port router end.
#7 Disconnect your computer from behind the your RJ-45 WAN port router router.
#8 Setup a Static with these settings for your computer's wired NIC.
IP Address: 192.168.1.1
Subnet Mask: 255.255.255.0
#9 Connect your computer using the wire that you disconnected from the Westell.
#10 Now Install the tool that I sent you a link to.
#11
Once installed, don't forget to use ** CTRL-ALT-F7 ** to reveal several "hidden" tabs, the signal levels and error counters, so forth.
#12 In the tool go to DSL tab.
#13
a) Copy down the info from there.
b) Disconnect the computer from the Westell modem.
c) Connect the RJ-45 WAN port router to the Westell modem.
d) Connect the computer to one of the your RJ-45 WAN port router's LAN ports.
e) Change that NIC to use DHCP.
f) Then post the info that you got from there....
^^^