Ussd 3 - M2M IDG500AM-0T001 User Manual

M2M Cellular Gateway
7.1.3 USSD
Unstructured Supplementary Service Data (USSD) is a protocol used by GSM cellular telephones to
communicate with the service provider's computers. USSD can be used for WAP browsing, prepaid
callback service, mobile‐money services, location‐based content services, menu‐based information
services, and as part of configuring the phone on the network.
An USSD messageis up to 182 alphanumeric characters in length. Unlike Short Message Service
(SMS) messages, USSD messages create a real‐time connection during an 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.
In "USSD" page, there are four windows for the USSD function. The "Configuration" window can
let you specify which 3G/4G module (physical interface) is used for the USSD function, and system will
show which SIM card in the module is the current used one. The second window is the "USSD Profile
List" and it shows all your defined USSD profiles that store pre‐commands for activating an USSD
session. An "Add" button in the window can let you add one new USSD profile and define the
command for the profile in the third window, the "USSD Profile Configuration". When you want to start
Index skipping is used to reserve slots for new function insertion, when required.
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