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Telephone System

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

The telephone network is made of three major components: local loops, switching offices, and ________

a)

handsets

b)

POP

c)

trunks

d)

tandems

2.

The carrier that handles intra-LATA services is called a __________.

a)

XCH

b)

POP

c)

IXC

d)

LEC

3.

The services offered by the common carriers (telephone companies) inside a LATA are called ___________ services

a)

inter-LATA services

b)

infra-LATA services

c)

intra-LATA services

d)

LATA services

4.

™The telephone network has several levels of switching offices such as end offices, __________offices, and regional offices

a)

trunk

b)

POP

c)

tandem

d)

national

5.

The services between LATAs are handled by _____________.

a)

IXCs

b)

XCHs

c)

inter-LATA

d)

intra-LATA

6.

The _______________ is responsible for setting up voice calls in SS7

a)

SC

b)

SP

c)

TUP

d)

ST

7.

The signaling network also includes a SCP that controls the whole operation of the network. SCP stands for ______

a)

service center point

b)

signal control point

c)

signal center point

d)

service control point

8.

The signaling network uses nodes called STPs that receive and forward signaling messages. STP stand for ________

a)

symbol transfer port

b)

signal transport point

c)

signal transfer point

d)

signal transport port

9.

A telephone network today can be thought of as two networks: a data transfer network and

a ________ network

a)

switching

b)

supervisory

c)

signaling

d)

packet

10.

The user telephone or computer is connected to the SPs. SP stand for _______

a)

signal port

b)

system point

c)

switch port

d)

signal point

11.

™MTP stands for ____________

a)

message transport point

b)

message transfer part

c)

message transfer point

d)

message transport part

12.

The protocol now used in the PSTN signaling network is called ____________.

a)

Signaling Seventh System

b)

System Seven Signaling

c)

Signaling System Seven

d)

Seventh System Signaling

13.

Communication inside a LATA is handled by end switches and _________ switches

a)

tandem

b)

trunk

c)

CO

d)

POP

14.

In out-of-band signaling, a portion of the ________ channel bandwidth was used for signaling; the voice bandwidth and the signaling bandwidth were separate.

a)

signal

b)

active

c)

voice

d)

in-band

15.

The signaling network is a ____________ network involving the layers similar to those in the OSI model or Internet model.

a)

circuit-switched

b)

message switched

c)

packet switched

d)

virtual-circuit switched

16.

In ________ signaling, same circuit can be used for both signaling and voice communication

a)

in-bound

b)

SS7

c)

out-of-band

d)

in-band

17.

Each IXC that wants to provide inter-LATA services in a LATA must have a _____ in that LATA

a)

XCH

b)

point of presence

c)

tandem

d)

hierarchy

18.

Complete the acronym LATA

a)

local-area transport access

b)

local-access transfer areas

c)

local-area transfer access

d)

local-access transport areas

19.

The telephone network, at its beginning, used a _________ network with dedicated links to transfer voice communication

a)

mesh

b)

circuit-switched

c)

packet-switched

d)

star

20.

The effective bandwidth of a telephone line being used for data transmission is __________ Hz

a)

4 kHz

b)

2400 Hz

c)

8 kHz

d)

6 kHz