About the LED Indicators on Your XFINITY Voice Modem

An XFINITY Voice modem is a device that combines your cable modem and analog telephone adapter. Download a diagram of the modem. The lights on the box indicate different functions. 

Here are descriptions of these lights:

Telephone 1 or Telephone 2

• A solid light indicates the phone(s) are on the hook.
• A flashing light indicates a phone is off the hook. 
• If the light is off, you’ll need to reset the XFINITY Voice modem.
• If the light is flashing very slowly, please chat with us.

Battery 1 or Battery 2

• If your XFINITY Voice modem is equipped with two battery slots, only one battery is needed in order to receive up to eight hours of backup power.
• One of the battery lights should be solid if the battery is good and connected properly. Your connection should not be affected by the status of the battery lights as long as you have power to the modem*.
• If the battery light is off and you have a backup battery inserted into the modem, make sure the battery is securely connected to the modem.  If you do not have a backup battery installed, this light will remain off. 
• If the light is flashing, your battery is depleted and may not provide backup power in the event of an outage.

A backup battery can be installed in your XFINITY Voice modem to provide additional hours of service during a power outage. If your battery is missing or depleted and you would like to purchase a new one, please call 1-888-972-1261. (Backup batteries are not available for purchase from Comcast by Unlimited Select customers.)

XFINITY Voice Service Interruption

*If XFINITY Voice service is interrupted as a result of downed cables connecting to your home or cuts to other portions of our network (as can happen in cases of severe storms), the service will not function until those facilities are restored. Depending on the specific facilities impacted, traditional phone providers may be affected.

Unlimited Select Customers: If there is an electrical power outage to the Comcast network in your area, your Unlimited Select will cease to operate during the outage, preventing inbound or outbound communications to or from systems or devices connected to Unlimited Select, including, but not limited to, home alarm or home security systems, medical monitoring devices, personal emergency alert devices or home detention devices.

Recycle Your Used Battery

For detailed instructions on how to recycle your used battery please click here.