实际上，48字节结构是美国电话公司偏爱64字节商务载量和欧洲公司要求每个信元有32字节之间的折衷。

• In fact,the 48-byte structure was a compromise between V.S. telephone companies,which favored a 64-byte payload,and their European counterparts,which wanted 32 bytes in each cell.