ITU规范G.704。E1帧结构定义。Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 kbit/s hierarchical levels

E1 Framer/Deframer,E1 framer Deframer core implements CCITT (ITU) recommedations G.704,G.706 and G.732 for 30 channel multiplexed E1 stream at 2.048Mbps rate. Note:This project is part of the OpenStacks initiative at the Telecom Software Laborator