- ARRL Technology Task Force HSMM WG - HSMM SEPTEMBER 2003 Created by Neil Sablatzky K8IT and Mark Williams AB8LN.
2 of 19 Narrowband Digital D-STARDMR/MotoTRBOSystem Fusion Number of users >41,00010,282>1,000 Repeaters 3,1901,235 >1,000 (most operating in mixed.