The SRG-123 Radio-gateway has the task of interfacing traditional radio equipment with the IP network. Its main purpose is to make the radio devices usable and remotely controllable from the User Terminals. Through the SRG-123 radio gateway a traditional radio device (HF, VHF or UHF) is transformed into a VoIP user thus becoming contactable by other VoIP users (user terminals or standard VoIP telephones).