Comcast is an excellent Internet access value. Yet, due to age of existing Comcast cable drops, customer owned inside cabling, and other factors, the signal quality to the cable modem may be deficient. Below are some guidelines to improving your service.

The physical transport must be optimal

We require business grade service

Downstream power needs to be 0db or higher.

Comcast state that a working range is -15db to +15db with lower than  -11db as being in the "yellow range". Unofficially,  Comcast insiders state it should be at  0db or higher for trouble free performance.

The picture to the right shows a Comcast cable modem with a power downstream power rating. This modem may not provide dependable Internet service over a long term.

Downstream signal to noise (SNR) needs to be 30 db or better.

This is especially important if the downstream power can not be improved. A weak signal needs weak noise to be heard.

Many factors affect cable modem Internet access quality. Yet, we find that the cable line improvements required for acceptable downstream power and SNR also improve upstream quality and the overall long term stability of the connection.