USSD

UNSTRUCTURED SUPPLEMENTARY SERVICE DATA

A CAPABILITY BUILT INTO GSM PHONES, MUCH LIKE THE SHORT MESSAGE SERVICE (SMS).

It is a protocol used by GSM cellular telephones to communicate with the service provider's computers. USSD can be used for prepaid callback service, mobile-money services, location-based content services, menu-based information services, and as part of configuring the phone on the network.

USSD messages are up to 182 alphanumeric characters in length. Unlike Short Message Service (SMS) messages, USSD messages create a real-time connection during a USSD session. The connection remains open, allowing a two-way exchange of a sequence of data. This makes USSD more responsive than services that use SMS.

A text message is first sent to a sender's Short Message Service Center (SMSC) before the SMSC tries to deliver the text message to the recipient. The sender receives an indication of whether the text was successfully received by the SMSC. USSD information is sent directly from a sender’s mobile handset to an application platform handling the USSD service. The USSD service can be located either in the sender's mobile network or in a visited mobile network.

A real-time "session" is initiated between the mobile user and the USSD application platform when the service is invoked, allowing data to be sent back and forth between the mobile user and the USSD application platform until the USSD service is completed.

A typical USSD message starts with an asterisk (*) followed by digits that comprise commands or data. Groups of digits may be separated by additional asterisks. The message is terminated with a number sign (#).

USSD MODES


MOBILE-INITIATED USSD

USSD PULL or USSD P2P

When the user dials a code, e.g. *139# from a GSM mobile handset

NETWORK-INITIATED USSD

USSD PUSH or USSD A2P

When the user receives a push message from the network; primarily used for promotional services.

USSD CHARACTERISTIC

A USSD message can be upto 182 alphanumeric characters in length

Simple and easy to send. No need to go into any menus and options. Just directly entered on the default mobile screen.

The functionality will be the same even while roaming as the USSD messages always routed back to Home HLR

Unlike SMS, USSD is a session oriented service.

USSD works on all GSM handsets of Phase II or later.



USSD is supported by WAP, SIM Application Toolkit and CAMEL enabling.

Works in two modes: pull mode and push mode.

There will not be any latency in request and response.



scope for many applications.

PRODUCT FEATURES

Supports static & dynamic menu creation.

Support for multiple third party interfaces over SMPP/HTTP/HTTPS.

Support for subscriber based menus (Prepaid / Postpaid).

Support for menus greater than 180 character length.

Support for charging interfaces integration.

Web interface for MIS/reporting.

Multilingual support

Support for region based menus.

Alert mechanism integration support

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