The REAL Hawaii
Roadrunner Network Status Page
If you cable modem is a General Instrument, now Motorola, Surfboard 3100 or 4100, you can check it's status by going to http://192.168.100.1/
http://192.168.100.1/signal.html will display Signal-to-noise ratio and power levels:
|Frequency||585000000 Hz Locked|
|Signal to Noise Ratio||35 dB|
|Network Access Control Object||ON|
|Power Level||0 dBmV
|Frequency||29008000 Hz Ranged|
|Ranging Service ID||827|
|Symbol Rate||1.280 Msym/s|
|Power Level||49 dBmV|
The most important item on this screen is the SIGNAL TO NOISE ratio; The higher this number, the better.
Also note the upstream power level: Anything higher than 55dBmV is indicative of a problem in the cable plant between your modem and the cable company's HFC (Hybrid fiber-coaxial) receiver.
If you want Roadrunner support, part of the run-around you'll get in opening a ticket is a request for information like your MAC address, modem serial #, etc - information Roadrunner should already have. You can locate this information easily at http://192.168.100.1/address.html
You can also RESET your cable modem, as well as view Logs that will show outages, initialization messages and other signal anomolies.
NTLWorld also has extensive information on Cable Modem Troubleshooting Tips.Rant or Rave: View comments & add yours!