Cable ONE Phone service includes a power failure backup battery which is capable of powering the phone service (eMTA) for up to 8 hours in standby. The included battery does not provide backup power for cordless phones and customers who rely on cordless phones should provide their own power backup for their telephone set(s).
Testing your backup battery
A battery indicator LED on the front of the eMTA will indicate whether the included battery is functioning properly. Cable ONE leased eMTA’s include an option for battery replacement should it fail during the subscription term – please call technical support if you believe your battery is not functioning properly. Batteries supplied by Cable ONE should be stored in the eMTA battery compartment and between -4 *F and 140*F.
Alternative Battery Backup
Customers who wish to have an alternative battery backup or an extended battery backup period can purchase a UPC (Uninterruptable Power Supply) from many retailers or online vendors. The following UPS (Uninterruptable Power Supply) are generally available for purchase in electronic retail stores and online and provide up to 24-hour battery backup for the phone Emta provided by Cable ONE: