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The computer's response is sent back to the phone, generally in a basic format that can easily be seen on the phone display. Messages sent over USSD are not defined by any standardization body, so each network operator can implement whatever is most suitable for its customers. USSD on a Google Pixel device (2018). The user submits a code ...
USSD gateway is based upon the ability of the delivery agent or the source to send and receive USSD messages. A USSD is a session-based protocol. USSD messages travel over GSM signalling channels, and are used to query information and trigger services. Unlike similar services (SMS and MMS), which are store and forward based, USSD establishes a ...
The choice of table for a given message is selected in the User Data Header section of an SMS message and can be specified for the whole text (a Locking shift table replacing standard GSM 7-bit default alphabet table) or a single character (Single shift table replacing the GSM 7-bit default alphabet extension table).
USSD (Unstructured Supplementary Service Data) codes [1] are mobile dial codes that can be used for communicating with the service provider's computers (i.e. 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).
Messages sent to a short code can be billed at a higher rate than a standard SMS and may even subscribe a customer to a recurring monthly service that will be added to the customer's mobile-phone bill until the user texts, for example, the word "STOP" to terminate the service. [citation needed]
When the subscriber sends a Short Message, the handset sends the text message over the air interface to the Mobile Switching Center (MSC)/Serving GPRS Support Node (SGSN). Along with the actual text of the Short Message, the destination address of the SM and the address of the Short Message service center (SMSC) are included, the latter taken ...
SMS text messages may be sent by mobile phone users to other mobile users or external services that accept SMS. The messages are usually sent from mobile devices via the Short Message Service Centre using the MAP protocol. The SMSC is a central routing hubs for Short Messages.
CAMEL Phase 1 defined only very basic call control services, but introduced the concept of a CAMEL Basic call state model (BCSM) to the Intelligent Network (IN). Phase 1 gave the gsmSCF the ability to bar calls (release the call prior to connection), allow a call to continue unchanged, or to modify a limited number of call parameters before allowing it to continue.