Figure 6-1: Elements of the Public Switched Telephone Network(PSTN The Access System consists of the access line to the customer (called the local loop) and termination equipment at the end office (nearest telephone office switch) 2 2. Access line Access Line (Local Loop) (Local Loop 2&3 end office Switch( Class 5) 6-66-6 Figure 6-1: Elements of the Public Switched Telephone Network (PSTN) 2. & 3. End Office Switch (Class 5) 2. Access Line (Local Loop) 2. Access Line (Local Loop) The Access System consists of the access line to the customer (called the local loop) and termination equipment at the end office (nearest telephone office switch)