OR, you could get a 5341J Zoom modem, better modem (CableLabs said so, so
), better warranty, 8 channel down for 70 bucks and stick it to The Man/The System (The Motorola man that is)
Come to the dark side lol
This comes from a former 6121 owner who got fed up with the T3s and etc issues and was especially glad I switched when Motorola's firmware "solution" to the T3/T4 issue was not to actually address/resolve it, but just to lock out the offending channel, thus dropping you to two upstreams. Hooray for complacency and band-aids.