From webpage of smslib.org.
Prerequisites
To use SMSLib, you should install the following components:
- SUN JDK 1.6 or newer.
- Java Communications Library.
- Apache ANT for building the sources.
- Apache log4j.
- Apache Jakarta Commons - NET.
- JSMPP Library
Apache Jakarta Commons - NET is found at http://commons.apache.org/proper/commons-net/