
Private Integrated Services Network (pisn) - Inter-exchange Signalling Protocol - Call Interception Additional Network Feature (anf)
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Private Integrated Services Network (pisn) - Inter-exchange Signalling Protocol - Call Interception Additional Network Feature (anf)
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻