Typical call-related IN procedure (2)
											3.						SCP
								2.
														4.
							SSP
				1.								5.
						Exchange										Exchange
	2. Trigger activated in Basic Call State Model at SSP
			Typical triggers:  Called number (or part of number)  Access code or ID information  Time (hour, day) or location (mobile system)  Calling number (or part of number)