If there is a loss of electrical power to my home, will my phone service be lost

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.