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  Product Manual
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  A - Terms and definitions
  B - References
  C - Message types
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  WAP Browser Settings
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  D - Database connection strings
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Automated phone calls?
Ozeki Phone System XE VoIP PBX software is an advanced PBX built for automated voice calls and 2 way SMS messaging. It has outstanding APIs for software developers. It can be used for:

Phone calls from SQL
Phone calls from HTTP
Voice and SMS applications

Callcenter developers
If you are working on telephone solutions, please check out the Ozeki VoIP SIP SDK.
It can be used to create VoIP client and server software.

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How to send an USSD Message

(USSD is available in Ozeki NG from version v2.4.4)

Unstructured Supplementary Service Data (USSD) is a technology unique to GSM. It is a capability built into the GSM standard for support of transmitting information over the signaling channels of the GSM network. USSD provides session-based communication, enabling a variety of applications. USSD is defined within the GSM standard in the documents GSM 02.90 (USSD Stage 1) and GSM 03.90 (USSD Stage 2).

Ozeki NG SMS Gateway supports sending USSD requests over GSM Modem connections. To send an USSD request you need to send an SMS:TEXT message and you should put the USSD information into the recipient number (Figure 1).

You can send USSD from the user interface and from any application for example you can use a database server to send USSD requests. Often responses to USSD requests are sent back by the network in an SMS message.

Additional information about USSD

USSD is instead session oriented, unlike SMS, which is a store-and-forward, transaction-oriented technology. Turnaround response times for interactive applications are shorter for USSD than SMS because of the session-based feature of USSD, and because it is NOT a store and forward service. Users do not need to access any particular phone menu to access services with USSD- they can enter the Unstructured Supplementary Services Data (USSD) command direct from the initial mobile phone screen.

USSD commands are routed back to the home mobile network’s Home Location Register (HLR), allowing for the virtual home environment concept – the ability for services (based on USSD in this case) to work just as well and in exactly the same way when users are roaming. Unstructured Supplementary Services Data (USSD) works on all existing GSM mobile phones.



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