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When it sends a Data Burst Message.
When the mobile does autonomous registration.
When the mobile station originates a call.

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Posted by waqqas1

When the mobile station responds with a page message.

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Posted by waqqas1

Global Challenge is performed when ever:

1. Registration: When the mobile does autonomous registration.
2. Origination: When the mobile station originates a call.
3. Terminations: When the mobile station responds with a page message.
4. Mobile Station Data: When it sends a Data Burst Message. E.g. SMS

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Posted by sagitraz