Lesson 12 - PBX System Components

Question 1

The PBX controls what three functions?

Answer 1

1. local in-company dialing
2. local calls off the premises
3. long distance calls.

Question 2

List three differences between the CO and PBX.

Answer 2

1. Private vs. public use.
2. PBX maintains a lower level of service protection. CO’s require 7-digit number; PBX less numbers.
3. PBS restricts stations or groups from services/features.

Question 3

Which are the three main components of the PBX?

1. traffic studies/CO lines/stations
2. system backup/stations/CO lines
3. features/stations/CO lines
   d. common equipment/station/CO lines

Answer 3

d. common equipment/station/CO lines

Question 4

Define CPU

a. Call Processing Unit
b. Common Processing Unit
c. Conference Programming Unit
d. Central Processing Unit

Answer 4

d. Central Processing Unit

Question 5

Describe two ways data is restored to the CPU after a system reboot or a power failure.

Answer 5

hard drives and PCMCIA

Question 6

Describe the purpose of the D-mark.

Answer 6

The dividing line between Telco and the customer -

- where public switched telephone network ends and connects with the customer’s on-premises wiring

Question 7

What is the most common trunk used by the PBX system?

a. loop start
b. ground start
c. tie line trunks
d. T1 trunks

Answer 7

b. ground start

Question 8

To seize dial tone with a ground start trunk, a technician temporarily grounds the _?) side of the circuit.

Answer 8

ring

Question 9

What is the transmission speed of a T1 circuit?

a. 1.54 Mbps
b. 1.44 Mbps
c. 154 Mbps
d. 144 Mbps

Answer 9

a. 1.54 Mbps

Question 10

ISDN circuits use ? technology to transmit voice and data signals.

a. analog
b. digital
c. analog and digital
d. wireless

Answer 10

b. digital

Question 11

++TEST - Direct Inward Dial circuits are used for incoming and outgoing calls. True or False?

Answer 11

False

Question 12

Similarly configured trunks pooled together are called ?

a. trunk access
b. trunk types
c. trunk circuits
d. trunk groups

Answer 12

d. trunk groups

Question 13

List four types of pooled trunk types.

Answer 13

ISDN
Private lines
VoIP
Paging

Question 14

Digital and analog telephones use what two pins on the 468A or 568B outlets?

a. 4/5
b. 3/4
c. 1/2
d. 5/6

Answer 14

a. 4/5

Question 15

Which two methods are used to access PBX system features?

Answer 15

dial and code *62

Dedicated button features

Question 16

? is the feature mostly used when the called party does not directly answer the phone.

Answer 16

voice mail

Question 17

This feature allows the caller to automatically be greeted and prompts the call to the company directory.

a. paging system
b. voice mail
c. call detail recording
d. auto attendant

Answer 17

d. auto attendant

Question 18

Which PBX software feature controls access to system features for all telephones?

a. class of service
b. trunk restrictions
c. tandem trunks
d. operates console

Answer 18

a. class of service

Question 19

A(n) ? allows any user in the PBX to call any extension in any networked PBX with minimum dialed digits.

a. restricted trunk access
b. tandem trunk access
c. uniform dialing plan
d. voice mail system

Answer 19

c. uniform dialing plan

Question 20

When all outgoing trunks are busy, which feature allows the caller to reserve the next available trunk?

a. call detail recording
b. trunk queuing
c. restriction access
d. trunk pool

Answer 20

b. trunk queuing

Question 21

All system programming, diagnostics and traffic analysis functions are accomplished through which method?

a. tape drive backup
b. system management
c. maintenance telephone
d. attendant console

Answer 21

b. system management

Question 22

Which PBX system feature controls long distance costs?

a. trunk pools
b. tandem trunks
c. amount of trunks
d. automatic route selection

Answer 22

d. automatic route selection

Question 23

Which PBX system listed below has less blocking?

a. P.01 Grade of Service
b. P.03 Grade of Service
c. P.05 Grade of Service
d. P.10 Grade of Service

Answer 23

a. P.01 Grade of Service