第三方信息服务
third party information service
离线半可信第三方
off-line trusted third party (off-STTP
Off-line Semi-trusted Third Party
物流、信息流、资金流同步
synchronization of logistics
information flow and capital flow
用户至用户信息信息
User-to-User Information Message
USR (User-To-User Information Message
被切换到的第三方MSC
The MSC to which the MS is handed over in a subsequent