I have a voice modem with internal battery that is also plugged into a UPS, But every time the power goes out,
the modem stays powered, but it shows a total loss of outside signal. I thought there was supposed to be battery
backups further down the line to prevent this loss of connections, but a email to ecare indicates that there
are no batteries anywhere further down the line, and if there is a local outage, the system will go out.
So which is it, total loss of service on each outage or should it stay up?
In addition to having the modem with either a battery or plugged in to a UPS, you also need to have the signal booster plugged in to a UPS. The signal booster should look like a transformer with a coax cable plugged in to it and might be located near your TV cable box. Without this your cable modem will continue to work, but it won't get a strong enough signal to keep your service up and running. In my house I have two UPSs, one that the cable modem is plugged into and another that the DVR and signal booster are plugged into so that it can continue to record shows if there's a brief power outage.