callback_gprs_failure()
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									 Description:  | 
								
									 Callback procedure, informs that PPP login/configuration or established link failed. Procedure body has to be created elsewhere in the project (externally with respect to the library).  | 
							
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									 Syntax:  | 
								
									 sub callback_gprs_failure()  | 
							
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									 Returns:  | 
								
									 ---  | 
							
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									 See Also:  |