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A short message service center (SMSC) is a network element in the mobile telephone network. Its purpose is to store, forward, convert and deliver SMS messages. The full designation of an SMSC according to 3GPP is ''Short Message Service - Service Center (SMS-SC)'' Basic Trajectories of SMS are # From Mobile to another Mobile, this trajectory is referred as MO-MT (Mobile Originated - Mobile Terminated) # From Mobile to a content provider (also called as Large Account / ESME), this trajectory is referred as MO-AT (Mobile Originated - Application Terminated) # From Application to a Mobile, this trajectory is referred as AO-MT (Application Originated - Mobile Terminated) ==Operation== The tasks of an SMSC can be described as # Reception of text messages (SMS) from wireless network users # Storage of text messages # Forwarding of text messages # Delivery of text messages (SMS) to wireless network users # Maintenance of unique time stamps in text messages When a user ''sends'' a text message (SMS message) to another user, the message gets stored in the SMSC (short message service centre) which delivers it to the destination user when they are available. This is a store and forward option. An SMS centre (SMSC) is responsible for handling the SMS operations of a wireless network. # When an SMS message is sent from a mobile phone, it will reach an SMS centre first. # The SMS centre then forwards the SMS message towards the destination. # The main duty of an SMSC is to route SMS messages and regulate the process. If the recipient is unavailable (for example, when the mobile phone is switched off), the SMSC will store the SMS message. # It will forward the SMS message when the recipient is available and the message's expiry period is not exceeded. SMSCs can be used to interface with other applications, for example a spreadsheet can interface with the SMSC allowing messages to be send SMS from Google spreadsheet, or to send SMS from Excel. Inbound messages to a longnumber or shortcode can also be passed through the SMSC allowing m2m communications or Telematics. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「short message service center」の詳細全文を読む スポンサード リンク
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