사설 및 농어촌 통합 디지탈 교환기

Service Integrated Digital PBX / RX

This paper presents a multi-purpose digital exchange which can be used as a private branch exchange(PBX) or a rural exchange(RX) or an exchange for the private special network. This new idea provides various features, reduced cost of installation and operation, easy expansion, replacement and relocation or reuse for another purpose at other locations.