USSD

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.

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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