Impedance stabilization networks (ISN, or with CISPR 16-1-2 called AAN: asymmetric artificial network) are defined for measuring of conducted common mode disturbances at information technology equipment (ITE) as required in CISPR 22 and CISPR 32. The ISN is placed between the equipment under test (EUT) and auxiliary equipment (AE) or load which are necessary for the operation of the EUT. The ISN establishes the common-mode termination impedance for the EUT’s telecommunications port during measurement and emulates the unsymmetrical contribution (longitudinal conversion loss, LCL) of the connected line. Different ISNs are available in relation to the line category, line numbers and pin-arrangement. The ISN T2A is designed for measurements on one unscreened balanced pair and consists of one basic network (ISN T200A) with D sub 25 connectors and special adapter sets. A set of adapters consists of LCL adapters to realize the longitudinal conversion loss (LCL)- requirements for the EUT-side in relation to the used cable category (cat. 3, cat. 5) and a connection adapter for the AE-side.
阻抗穩定網路（ISN），在 CISPR 16-1-2 中亦稱為 AAN（非對稱人工網路），用於測量資訊技術設備（ITE）在 CISPR 22 和 CISPR 32 規範下的傳導共模干擾。
ISN 置於**受測設備（EUT）與輔助設備（AE）**或負載之間，以確保受測設備在測試期間的電信端口具有適當的共模終端阻抗，並模擬連接線纜的非對稱特性（縱向轉換損耗，LCL）。
針對不同的線纜類別、線數及針腳排列，提供不同類型的 ISN。
ISN T2A 設計用於測試單條非屏蔽平衡雙絞線，其組成包括：
