Programming Resources

Kannel is an open source SMS and WAP gateway. It is developed on Linux using C but should be able to run on Unix like systems. For Windows, you will need the Cygwin to compile it.
For SMS services,

Work as both Pull and Push gateway
Can handle 7-bit, 8-bit and Unicode data
Delivery reports
Can handle hundreds of messages […]

Mbuni is a fully-fledged Free/Open Source Multimedia Messaging Service (MMS) gateway. It includes both core network MMS switching (i.e. MMSC) capabilities as well as messaging gateway (i.e. MMSC infrastructure integration) features, and is suitable for operators and MMS VAS providers.
Mbuni implements all major MMS interfaces, including phone-to-phone (so-called MM1 interface), phone-to-email (MM3), inter-MMSC (MM4) and […]

Have you ever noticed or aware of the ‘+’ sign that is prefixed in the phone number that we dial or store in the address book in our mobile phone? What is the significance of putting a ‘+’ sign in front?
All the telephone numbers we dial follow certain format known as E.164 addressing format – […]

Frankly speaking I haven’t tested it yet. I was browsing through the projects by JBoss, and discovered Mobicents.
Telco is one area that I am always interested in, as most of my projects are telco related. It is interested to see a open source project like Mobicents.
According to JBoss, Mobicents is a highly scalable event-driven […]