(Cisco's internal training PPT allows pre-sales personnel to learn Cisco's service system as quickly as possible, and use the resources and tools of Cisco's website to solve problems. It is a rare resource and I hope everyone cherishes it. Chapter 1 Introduction to Pre-sales System Chapter 2 Use of DCT (dynamic configuration tool) Chapter 3 Use of EMD (error message diagnosis) Chapter 4 Use of SA (software upgrade) Chapter 5 Introduction to common tools on Cisco website Chapter 6 Open CASE to CISCO to solve the problem Chapter VII Introduction of CISCO Technical Support Service System)