V.35接口与E1接口之间转换的基本原理,介绍了E1信道分时隙通信的基本过程，叙述了基于FPGA用VHDL和QuartusII来仿真本系统设计与实现的过程。-V.35 interface and E1 interface to convert between the basic principles of E1 channel introduces the basic process of communication sub-time slot, described by VHDL and FP