ETSI PRETS 300 392-3-3-1999 陆地集群无线电(TETRA).语音加数据(V+D).第3部分:系统间接口的互通(ISI).第3子部分:附加网络特性群呼叫(ANF-ISIGC)
Terrestrial Trunked Radio (TETRA); Voice Plus Data (V+D) Part 3: Interworking at the Inter-System Interface (ISI); Sub-Part 3: Additional Network Feature Group Call (ANF-ISIGC)