The dmr server fro APRS in the usa is 310999 – ARS/GPS
brandmeister USA info
APRS relays through this server when you are on line. It doesnt transmit on 2meters
for dm-1702 the instructions are listed here aprs-on-baofeng-dm1702/
Everything about 2 Way radio both gmrs,HAM,DMR,ALLSTAR,Hamvoip