The multimedia terminal adapter (the phone modem or "MTA") used to provide phone service over Mediacom's broadband network uses household electrical power. Mediacom does include a battery backup with some models of MTA to provide backup power for a limited time during a power outage affecting your home. Battery backup power will not maintain service if the outage affects the Mediacom network. Please note: Similar to a cordless phone, Mediacom phone will not operate if the power in your home goes out or if you unplug the power connection, and you may lose access to 911 emergency service during the outage.
We do recommend maintaining alternative service such as a cellular phone in case of a power outage or an outage on Mediacom's network. If you are not able to maintain another phone service, and do require 911 access at all times due to health problems or something similar, it may be better for you to consider a more traditional type of phone service that is suitable to your needs.