Categories EPC LTE Mobile Networks RFCs & Standards SDM VoIP Basics of EPC/LTE Online Charging (OCS) Post author By Nick Post date 04/07/2021 2 Comments on Basics of EPC/LTE Online Charging (OCS) A glimpse into the complexities of prepaid billing (Online Charging) Diameter based networks. Tags Charging, Diameter, EPC, IMS, LTE, OCS, Online Charging, VoLTE