From NENA Knowledge Base

Macrocell is a wireless carrier installed and activated cell that may have a radius range of approximately at least one kilometer but up to 20 kilometers (or approximately one-half mile to 12 miles) and provide access to all wireless handsets and access devices.

Relevant NENA Documents
Note: To find and download the document, copy the document number (like NENA-STA-010) from below and search the NENA Standards and Documents page.

NENA-INF-018, NENA Non-Mobile Wireless Service Interaction Information Document