说明：  短信网关（ismg）的建设可以为sp与短消息中心（smsc）之间数据交换提供一条安全、快捷的通道，以便手机用户采用短信方式与sp双向通信，接收sp提供的信息服务，同时完成相应计费采集、业务管理、网络管理等功能。
(SMS Gateway (ismg) for the construction and sp Short Message Center (SMSC) for data exchange between provide a safe, efficient access to mobile phone users using text messages and two-way communication sp. sp receiving information services providers, while completing the corresponding billing collection, operations management, network management capabilities.)