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The service does not require a messaging app, and does not incur charges. [2] USSD messages are up to 182 alphanumeric characters long. 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.
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 main alternative is an answering machine or voicemail, but some callers do not wish to leave a recorded message, but want to have a two-way conversation. Some businesses have their calls forwarded to a call center , so that the client can reach an operator instead of an answering machine or voice mail.
Once a mobile phone has successfully attached to a GSM network as described above, calls may be made from the phone to any other phone on the global Public Switched Telephone Network. The user dials the telephone number , presses the send or talk key, and the mobile phone sends a call setup request message to the mobile phone network via the ...
For example, an outbound messages might cause a set of vending machines to report their inventory level, change pricing, etc. Later versions of Cellemetry used other signaling messages such as USSD messages [24] as the outbound messaging mechanism. [citation needed] Cellemetry had a number of advantages that led to its widespread adoption ...
Here Are 8 of the Best Sites for Free Reverse Phone Lookups There are a lot of sites out there that promise to do these searches for you, and it can be hard to tell which ones are legitimate.
Here's what you need to know. The post If These Apps Are Still on Your Phone, Someone May Be Spying on You appeared first on Reader's Digest.
SMPP is able to carry short messages including EMS, voicemail notifications, Cell Broadcasts, WAP messages including WAP Push messages (used to deliver MMS notifications), USSD messages and others. Because of its versatility and support for non- GSM SMS protocols, like UMTS , IS-95 (CDMA), CDMA2000 , ANSI-136 (TDMA) and iDEN , SMPP is the most ...