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Short Message Service, commonly abbreviated as SMS, is a text messaging service component of most telephone, Internet and mobile device systems. It uses standardized communication protocols that let mobile phones exchange short text messages, typically transmitted over cellular networks .
Cell Broadcast (CB) is a method of simultaneously sending short messages to multiple mobile telephone users in a defined area. It is defined by the ETSI's GSM committee and 3GPP and is part of the 2G, 3G, 4G and 5G standards. [1] It is also known as Short Message Service-Cell Broadcast (SMS-CB or CB SMS). [2] [3]
An alternative to inbound SMS is based on long numbers (international mobile number format, e.g., +44 7624 805000, or geographic numbers that can handle voice and SMS, e.g., 01133203040 [44]), which can be used in place of short codes or premium-rated short messages for SMS reception in several applications, such as TV voting, [47] product ...
That is the parties to the call, the time of the call and for cell phones, the cell tower being used by the target phone. For text message, the same information is sent but the content is not sent. This level is called "Trap and Trace". The second level of CALEA wiretap, when permitted, actually sends the voice and content of text messages.
A short-range device (SRD), described by ECC Recommendation 70-03, is a radio-frequency transmitter device used in telecommunication that has little capability of causing harmful interference to other radio equipment.
SMS (short message service) is a text messaging service component of most telephone, Internet, and mobile device systems. It uses standardized communication protocols to enable mobile devices to exchange short text messages. An intermediary service can facilitate a text-to-voice conversion to be sent to landlines.
Lines of signalling relay stations can send messages to any required distance, but all these systems are limited to one extent or another in the range of messages that they can send. A system like flag semaphore , with an alphabetic code, can certainly send any given message, but the system is designed for short-range communication between two ...
The text of a message was first typed on a computer and then uploaded into the SRAC device. When an agent came within the range of the interrogating signals from the receiving station, usually mounted within British diplomatic posts, the device instantly transmitted its message. [4]