It is a
server that allows the user to use directly the network
functions
from their GSM-based mobile phones. The USSD Server
provides
the ability of a rich set of vertical capabilities including
subscriber
account management, balance inquiry, callback,
messaging,
voting, short quiz applications, and interactive chat. This
capability
can also reduce the use of voice-channel resources and
reduce difficulty
presented by interaction with an integrated voice
response
application.
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