USSD
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USSD



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DEFINITION - USSD (Unstructured Supplementary Service Data) is a Global System for Mobile(GSM) communication technology that is used to send textbetween a mobile phone and an application program in the network. Applications may include prepaid roaming or mobile chatting.

USSD is similar to Short Messaging Service (SMS), but,unlike SMS, USSD transactions occur during the session only. With SMS, messagescan be sent to a mobile phone and stored for several days if the phone is notactivated or within range.

The Wireless Application Protocol (WAP) supports USSD. USSDis defined in the GSM standard documents GSM 02.90 and GSM 03.90.

CONTRIBUTORS: Eduardo Gonzalez
LAST UPDATED: 18 Apr 2007

Read more about USSD:
- Mobile USSD provides additional information.
- MobileIN.com also provides additional information.
- SarchNetworking.com offers a section about "Wireless in the Enterprise."


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