Short Message Service
According to Reporters without Borders, China has over 2,800 Short Message Service (text messaging) surveillance centers. As of early 2010, cell phone users in Shanghai and Beijing risk having their text messaging service cut off if they are found to have sent "illegal or unhealthy" content.
In 2003, during the severe-acute-respiratory-syndrome (SARS) outbreak, a dozen Chinese were reportedly arrested for sending text messages about SARS. Skype reported that it was required to filter messages passing through its service for words like "Falun Gong" and "Dalai Lama" before being allowed to operate in China.
During protests over a proposed chemical plant in Xiamen during the summer of 2007, text messaging was blocked to prevent the rallying of more protesters.
Other articles related to "short message service, messages, message, service, short message":
... The Short Message Service—Point to Point (SMS-PP)—was originally defined in GSM recommendation 03.40, which is now maintained in 3GPP as TS 23.040 ... GSM 03.41 (now 3GPP TS 23.041) defines the Short Message Service—Cell Broadcast (SMS-CB), which allows messages (advertising, public information, etc.) to be broadcast to all mobile users in a specified ... Messages are sent to a short message service center (SMSC), which provides a “store and forward” mechanism ...
... Silent messages, often called "silent sms, "stealth sms," or "stealthy ping," will not show up on the display, nor is there an acoustical signal ... This kind of message is sent especially by the police to locate a person or to create a complete movement profile of a person ... were sent by the federal police, the customs, and the secret service "Office for Protection of the Constitution." ...
... The Short Message Service is realised by the use of the Mobile Application Part (MAP) of the SS#7 protocol, with Short Message protocol elements being ... These MAP messages may be transported using 'traditional' TDM based signalling, or over IP using SIGTRAN and an appropriate adaptation layer ... The Short Message protocol itself is defined by 3GPP TS 23.040 for the Short Message Service - Point to Point (SMS-PP), and 3GPP TS 23.041 for the ...
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