2. Define the fallowing terms: CPS (central processing system) - Brains of the switch, NCP (network control processor) – Mini brains of the switch; ICS (interface controller) – Interface between the NCP and the line modules, Trunk Module – The portion of the switch where the trunk circuit terminates, Line Module - portion of the switch where the individual POTS (plain old telephone lines).
3. Explain the difference between a tandem switch and a class 5 switch. A tandem switch is a class 4switch, its main purpose is to switch trunks, between the toll switch and the local telephone net work ,and between the CLEC regional center class 5 switches, between the ILEC’s end-office class 5 switches, and between operator services toll switches called OSPS’s. A class 5 switch (local) has line modules, trunk modules, interface communications modules, a switch fabric, network switch processors and central switch processors. It is ...view middle of the document...
5. Explain the difference between a long distance switch and an international switch. A long distance switch routes traffic through the long distance network. The types of interfaces that terminate on a long distance switch are
Inter machine trunks (ITMT’s); they can also connect to databases that are used to
validate calling card calls A international switch is a digital switch able to dial a person living three continents away
6. Explain how a class 5 switch routes a call traveling between two lines that are served from the same switch. A class 5 switch has a (PIC) which allows the switch to route calls to the local network.
7. Explain how a call is routed between an end-office switch and the local tandem switch. Routes from one end office to a LD switch then to another LD switch which is connected to the Tandem switch.
10. Why do business customers purchase private branch exchanges. These are used in situations where the amount of processing power needed is not as great so that you can call other depts. Within the business in a cost effective manner.
14. Define each part of the following number as defined by the North American numbering plan: 818-555-9877. 818 is the area code identifying the region, 555 is the central office code to identify the central office within that area code region, 9877 is the subscriber line number, this identifies the customer.
20. Define the following terms.
* Busy Hour = A traffic engineering measurement used to size the number of trunks required or switches needed.
* Average Hold Time = The average hold time is the average time taken for an operator to answer a call or the time a customer waits in the queue before being answered.
22. List three of the class 5 features offered by the class 5 switch.
* Call Waiting When you are already on a call, Call Waiting lets you know when someone else is trying to get through.
* Call Barring Options to bar outgoing calls.
* Voicemail ensures you receive a message from callers when you are not available.
* Caller ID Displays callers number either on a CLID device or a special phone.