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GSM Terminating SMS Call

SMS terminating call flow

In this call flow we will look at how a terminating SMS is handled in GSM. Setting up a terminating
SMS session is a multi-step process.

  1. Interrogate the MSC to locate the subscriber
  2. Setting SMS session setup and acquiring radio resources
  3. Sending the SMS.
  4. Releasing the session and associated radio resources.

GSM Mobile Terminated SMS Sequence Diagram

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