Port A: 5 Pin for TDL & Pacific Crest ADL, HPB, PDL, RFM-96, High Power Base RadioPort B: 7 Pin for Hiper V, HiPer II, Hiper GA, Hiper+, Hiper Lite, Legacy, Legacy E, GR5, GR3 ReceiverPort C: SAE/2P Power connector on 5 pin end