What UDP port is used between PCF and PDSN for the A11 interface by default? 01/21/2017 – by Mod_GuideK 0 What UDP port is used between PCF and PDSN for the A11 interface by default? A. 699 B. 400 C. 3868 D. 1812 SHOW ANSWERSCorrect Answer: A Explanation/Reference: Topic 7, HSGW_4G EHRPD node