本标准描述了PHS短消息网关（SMGW）和服务提供商（SP）之间、短消息网关（SMGW）和短消息网关（SMGW）之间的通信协议。本协议简称CNGP（China Netcom Short Message Gateway Protocol）-descr iption of the standard PHS Short Message Gateway (SMGW) and service providers (SP) between Short Message Gateway (SMGW) and t