A Battery Backup can be purchased for your Xfinity Voice modem to provide additional hours of service during a power outage.
Note: If there is a power outage and a Battery Backup is installed for your Voice modem, only the primary phone number will work.
What happens
In the event of an emergency, a Battery Backup can support your service for several hours so your phone and alarm system should remain fully operational for up to 24 hours. To purchase an Xfinity Voice Battery Backup, visit xfinity.com/voicebattery.
If you have a home security system, contact your home security provider prior to your Xfinity Voice service installation so you can arrange a compatibility test.
Note: If you lose your power due to severe weather, Comcast cannot support priority consideration of "restoration of service" requests to service locations using in-home medical monitoring equipment such as oxygen or heart monitors.
