Mobicents 是一个专业开源的 VoIP 中间件平台。Mobicents 是第一个而且是目前唯一开源并被 JAIN SLEE 1.0 认定的产品，它从交换协议构造上基于 JAIN-SIP。Mobicents SMPP 是 Mobicents 支持 SMPP 短信协议的扩展。
The Mobicents SMPP stack is implementation of SMPP Version 5.0 ">Specifications.
This is follow up release of Mobicents 1.0.0.FINAL with following two minor fixes
·SMPP message does not support concatenated messages
·Sequence generation logic incorrect for SMPP Sequence Number
The Short Message Peer to Peer (SMPP) protocol is an open, industry standard protocol designed to provide a flexible data communications interface for transfer of short message data between a Message Center, such as a Short Message Service Centre (SMSC), GSM Unstructured Supplementary Services Data (USSD) Server or other type of Message Center and a SMS application system, such as a WAP Proxy Server, EMail Gateway or other Messaging Gateway.
Using the SMPP protocol, an SMS application system called the External Short Message Entity (ESME) may initiate an application layer connection with an SMSC over a TCP/IP network connection and may then send short messages and receive short messages to and from the SMSC respectively. The ESME may also query, cancel or replace short messages using SMPP.
下载地址：http://sourceforge.net/projects/mobicents/files/Mobicents%20SMPP/1.1.0.CR1/