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Ushahidi Platform USSD Service Summary. |
USSD, which stands for Unstructured Supplementary Services Data, is a protocol that allows for the transmission of information via a GSM network.
Users enter a USSD string and press call to send the message. A typical USSD message starts with a * followed by digits which indicate an action to be performed or are parameters. Each group of numbers is separated by a *, and the message is terminated with a #.
For example, in Kenya, to find out what your airtime balance is on Safaricom, a user will dial *144#. Unlike SMS, USSD messages create a real-time connection during a session, that remains open, allowing a two-way exchange of a sequence of data.
This documentation explains details about a service that allows for users to send in reports to ushahidi deployments via USSD on Ushahidi v3.
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Source codes for the Ushahidi Platform API USSD Service is available here on GitHub.__