%0 Journal Article %T Design and implementation of analog telephone on IPPBX network interconnection %A Atmadja, M D %A Soelistianto, F A %A Aisah, A %A Ratnawati, Y %J IOP Conference Series: Materials Science and Engineering %V 732 %N 1 %P 7 %@ 1757-8981 %D 2020-01-01 %~ DeepDyve