PD 7025 AMD 1-1995
使用CCITT G.703推荐标准规定的接口在75 欧姆不对称表示的8448 K比特/秒扫描率与公共通信网非结构数字出租
Essential requirements for terminal equipment intended for connection to unstructured digital leased circuits of the public telecommunications network using a CCITT Recommendation G.703 interface at a rate of 8448 kbit/s with a 75 ohms unbalanced presenta