Yes — North Carolina requires a phone within 300 feet of the pool with direct 911 dialing, and some counties require a handset-style unit (15A NCAC 18A .2530).
North Carolina requires the emergency telephone to be within 300 feet of the pool. In certain counties, the phone must use a handset rather than push-button-only operation. Clear access, signage, and the ability to dial 911 directly are all required.
Citation: 15A NCAC 18A .2530
North Carolina is one of the more detailed states on this list — beyond the 300-foot distance, always confirm with your county health department whether the handset requirement applies to your property before purchasing equipment.
SouthEast Telephone installs and monitors cellular emergency pool phones nationwide and can help you meet North Carolina's requirements.