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Take your life off hold

Cox Voice equipment

To get the best service, you'll need the right equipment.

Cordless phone handset

Phone handset

To use all Cox Voice features, you’ll need a phone handset that runs on DECT 6.0 digital technology and supports features like Caller ID and Call Waiting.


DECT 6.0 technology comes with other perks, like:

  • More range without using more power
  • Crystal-clear sound quality
  • High protection against eavesdropping
  • Better range than 2.4GHz and 5.8GHz phone systems
  • No interference from wireless networks

Cox Voice eDVA Internet/WiFi modem and phone adapter

All-in-one modem

An eDVA is an all-in-one Internet/WiFi modem and phone adapter. One will be provided with your Cox Voice service.

Cox Voice phone modem battery view


Cox Voice is connected to your home's power, so if you have an outage, you'll need a battery installed in your phone modem to access your phone service and e911.

Learn more about batteries

Equipment FAQs

You can install the batteries yourself, or you may have the option of having a Cox technician install the batteries for you. Professional installation is available at checkout.

It's smart to check the battery status of your telephone equipment on a regular basis. There's a battery indicator light on the front of your modem. You can see what the light is saying about your battery here.

Backup batteries can provide up to eight hours of standby service or up to four hours of talk time using a corded telephone that doesn't need power and is directly connected to the modem's jack.

You can buy batteries when you first sign up for Cox Voice or anytime at one of our retail locations.

In an outage, your corded phone will work using your backup battery, but cordless phones require an additional power source, which is why we recommend keeping a corded phone around to use whenever you lose power. Also, make sure you keep non-emergency calls to a minimum during a power outage to prolong the life of your battery. Get more information here.

For printable instructions and to assist with self-installation read our setup sheet.

See Cox Digital Telephone service details. See important Cox Digital Telephone Power Outage usage information. See important information in the Residential Customer Service Agreement for full coverage details. See Annual Notice information for related information and your privacy rights as a Cox customer. For all Cox Communication policies regarding our services and business practices visit www.cox.com/aboutus/policies.html.