
Private Telecommunication Network (Ptn) - Specification, Functional Model And Information Flows - Do Not Disturb And Do Not Disturb Override Supplementary Services
出版:Polish Committee for Standardization

专家解读视频
Private Telecommunication Network (Ptn) - Specification, Functional Model And Information Flows - Do Not Disturb And Do Not Disturb Override Supplementary Services
出版:Polish Committee for Standardization
专家解读视频