Your Time Warner Cable Home Phone modem (known as eMTA) is powered by plugging it into an electrical wall outlet. If you wish, you can purchase a backup battery after Home Phone is installed.
Please visit twc.com/powerbackup for additional information, including tips on how best to prepare for an electrical outage.
To verify that the backup battery you purchased is working, check the indicator light on the front of your modem. If it is on then your battery is charged and operating properly.
To test your battery:
Please visit our User Guides to access additional information.