Hot Spot & Crossband Notes

Technical information and best practices for using hotspots and crossband repeaters

Southeastern Repeater Association (SERA) has allocated frequencies for Hot Spot & Crossband repeat use. Allocations on the 70cm (440MHz) band were made for this purpose.
You can find the full document on SERA's Website.


Digital Hotspot Frequencies

SERA-recommended frequencies for DMR, D-Star, NXDN, P25, YSF, etc.

“Hotspots” are low-power digital interface devices intended to bridge between the Internet and hand-held digital-mode radios.

440.9250440.9500440.9750 441.0250441.0500
441.0750441.1000441.1250 441.1500441.1750

These frequencies are shared with Narrow Band FM Digital Simplex users. Choose a frequency not already in local use. No amplifier or external antenna should be used, and handheld transmit power should be set to minimum.

Home Hotspot Setup (2025)

I recently switched to WPSD software by W0CHP for my Raspberry Pi hotspots.

Current home hotspots:

Equipment Used:

FM Crossband Repeat Simplex (NBFM)

Fixed Stations ONLY – 12 Simplex Channels

440.7375440.7625440.7750 440.7875440.8125440.8250
440.8375440.8500440.8625 440.8750440.8875440.9000

Mobile Stations ONLY – 12 Simplex Channels

445.7375445.7625445.7750 445.7875445.8125445.8250
445.8375445.8500445.8625 445.8750445.8875445.9000