Regulations for Administration on Type II Telecommunications Business Article 24
A Intra-corporation Network Communication Service operator shall be recorded and reserved the circuit number of leased line that connect intranet joint points, tables of related routes and the communication record information.The circuit number of leased line that connect intranet joint points and tables of related routes as referred to in the preceding paragraph must reserve continuously and the record information of telephony shall be reserved for six months at least.
中文原文 第二類電信事業管理規則第24條
經營公司內部網路通信服務者，應登錄及保存連接網路內部節點之專線電路編號、相關路由表及通信紀錄資料。
前項連接網路內部節點之專線電路編號、相關路由表於經營期間內須持續保存，通話紀錄資料應至少保存六個月。
前項連接網路內部節點之專線電路編號、相關路由表於經營期間內須持續保存，通話紀錄資料應至少保存六個月。