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 presentation
使用CCITT建议G.703接口以8448 kbit/s速率连接到公共电信网络非结构化数字租用电路的终端设备的基本要求