From SMS Gateway Enterprise Software:
SMS gateway can be used over HTTP SMS connections, ideal platform for SMS notification, SMS paging, two way SMS systems, or for becoming an SMS service provider. SMS Service providers often create SMS services like SMS Voting, SMS Banking, and SMS Games. It supports SMS API for SQL, .NET, ASP, ASP2, VB, C#, C++, Delphi, PHP, JAVA and for OEM vendors. It can be configured as an HTTP SMS Gateway for WEB SMS applications, as an E-mail SMS Gateway for E-mail SMS alerts. For SMS transfer IP SMS protocols and GSM Modem AT commands are used. IP SMS protocols, such as SMPP provide high performance. Good quality GMS modems, such as Wavecom Fastrack, Siemens MC65, TC65, TC35 and Voice GSM modules, such as the Nokia 30 and Option 3G modems can be used to run your most demanding SMS applications.
What's new in this version:
Version 4.2.32 adds now you can set the time between reconnection tries for SMPP connections.