Joseph Roberts
3/22/13
IT321
HW Wk. 1
Ch. 9
Pgs 258-259

2. Define the following terms: a. CPS- the brain it has access to the NCP and line and trunk module, main functions are global call processing, it’s also responsible for software upgrades and system recovery. b. NCP-receives questions about call routing, and feature requests from the line and trunk module c. ICS- Connects the line or trunk module to the switching fabric, also talks directly to the NCP d. Trunk Module- the part of the switch where the circuits terminate e. Line Module- the part of the switch where the POTS lines terminate 3. Explain the difference between a tandem switch and a class 5 switch. A class 5 switch is responsible for all line side terminations. The tandem switch is a class 4 switch that switches trunks to route them between class 5 switches. 4. Explain the difference between a tandem switch and a long distance switch. A tandem switch is a class 4 switch used to switch trunks. A long distance switch routes traffic through the long distance network. 5. Explain the difference between a long distance switch and an international switch. A long distance switch routes traffic through the long distance network. A international switch is a switch able to dial far away. 6. Explain how A class 5 switch routes a call traveling between two lines that are served from the same switch. 7. Explain how a call is routed between an end-office switch and the local tandem switch. 10. Why do business customers purchase private branch exchanges? 14. Define each part of the following number as defined by the North American numbering plan: 218-555-9877. 20. Define the following terms: 21. Name five features offered by the class 5 switch. 22. List three of the CLASS features offered by the class 5 switch.