The REAL Hawaii Roadrunner Network Status Page

Checking Your Cable Modem

If you cable modem is a General Instrument, now Motorola, Surfboard 3100 or 4100, you can check it's status by going to will display Signal-to-noise ratio and power levels:

Downstream Value
Frequency 585000000 Hz Locked
Signal to Noise Ratio 35 dB
QAM 64
Network Access Control Object ON
Power Level 0 dBmV
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading


Upstream Value
Channel ID 1
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 

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.

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