GSM Originating Call

GSM user to PSTN originating call is described here. The different call phases are covered in detail:

• RR connection establishment.
• Ciphering
• SCCP connection establishment and call setup with the MSC
• ISUP call setup with PSTN
• Call Release

• GSM Originating Call Flow
• GSM Originating Call Poster (11x17)
• GSM Originating Call Overview
• GSM Originating Call Context Diagram
• Mobile, GSM Network and PSTN Level Call Flow
• GSM Mobile, BSS, NSS and PSTN Level View
• Mobile Role Call Flow
• Mobile Role Context Diagram
• BSC Call Flow
• BSC Context Diagram
• MSC-VLR Call Flow
• MSC-VLR Context Diagram
• PSTN Call Flow
• PSTN Context Diagram