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Your Comcast Business Voice modem typically draws power from an external power source like an outlet. However, we provide battery backup for your Comcast Business Voice service so you can maintain service during a power outage.
The back-up battery in Comcast Business Voice modems enables your phone service for up to 8 hours of battery life and 5 hours of talk time. If your modem does not have a battery, or if the battery is faulty, you won't have phone service during an outage.
We recommend having one battery in your modem. If your modem has two battery slots, you still only need one battery.
• If the battery light is solid, your battery has charge.
• If the battery light is out, make sure the battery is properly connected.
• If the battery light is flashing, you may need to replace your battery.
If your battery is not present, or if it has been depleted, please visit help.comcast.net/modem/battery/order so that we can send a battery to your company immediately. There is no additional charge for the replacement battery.
Note: Comcast Business Trunks and VoiceEdge hardware does not include battery backup.
Identify what type of modem you have. Look on the front or the bottom of your device, where you will find the brand and model number.
Listed below are some of the more common types of devices installed for Comcast Business phone customers. Select your device from the list to view the user guide, which will provide more information on installing the battery.
User Guide: Arris 602
User Guide: Arris 604
User Guide: Arris 608
If your device is not listed, or if you need assistance with the installation, please call 1-800-391-3000 to speak to a representative.
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Batteries are accepted for recycling at no charge at various locations.
If you are having trouble with your Business Voice service, such as a loss of dial tone, try resetting your voice modem.
Utilize these simple troubleshooting recommendations to resolve Comcast Business Internet issues.
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