1)circuit adapter,线路适配器2)LA Line Adapter,线路适配器3)four-wire line adapter,四线线路适配器4)communication line adapter (CLA),通信线路适配器5)communication line adapter,通信线路适配器6)HSLA High Speed Line Adapter,高速线路适配器7)HLA High speed Line Adapter,高速线路适配器8)LLA Low speed Line Adapter,低速线路适配器9)LAU Line Adapter Unit,线路适配器单元10)RLA Remote Line Adapter,远程线路适配器
