I use the same I use the same dongle dongle and SDR trunk and SDR trunk I monitor an apCO 25 Network.... However I only use a single dongle for listening to the opp listening to the OPP however I don't hear any other traffic such as moh OR mto.... an uneducated guess is probably I and uneducated guess is probably I have a single dongle where I should be using 2.....