We have a Belkin router and it keeps locking up due to bad signal levels from the cable company.... I used to have a Toshiba modem that did the same thing......
Makes me wonder if these pieces of hardware that lock up due to low signal are actually BETTER as they are looking for the signal level TO BE WHERE ITS SUPPOSED TO BE!! (The signal drops too low and it causes the equiptment to transmit TOO HIGH and it locks up as a result)
Stuff that doesnt have issues with the signal dropping might not be as reliable...Sure they do not lock up BUT THAT DOESNT MEAN THEY ARE BETTER.. (It means they arent as selectable about the levels which techinally isnt as good)
How do you make the connection of the router "locking up" with bad signal levels? Is this an all in one unit? If not, it makes no different what signal your modem gets, it will always output a level within specs. You may need to clarify your issue, right now it is as clear as mud.