Deck 10: Signaling

Question 1

Signaling is responsible for:

A) establishing connections
B) gathering information.
C) gathering information
D) all of the above

Answer 1

all of the above

Question 2

Loop start signaling and ground start signaling tell the switch that a telephone is ________-hook.

Answer 2

off

Question 3

Loop start signaling is the type of signaling found on telephone lines that initiates dial tone when one lead is touched to the ground.

Answer 3

False

Question 4

Business systems such as a PBX or key system are adversely affected by incoming, outgoing call collisions and therefore require a special signaling method, called ________ start signaling, to eliminate the chance of glare.

Question 5

Birds can sit on a power line without being electrocuted because they are not ________ and, therefore, are not creating a complete circuit.

Question 6

Each digit on a rotary dial has a defined number of ________ that click when dialed and are interpreted by the switch.

Question 7

Which of the following is a type of common channel signaling?

A) single frequency signaling (SF)
B) multifrequency signaling (MF)
C) ear-to-mouth signaling (E&M)
D) all of the above
E) none of the above

Question 8

The ability to place fraudulent calls, as well as the amount of bandwidth needed to carry the signaling information, are two common problems associated with which form of in-band signaling?

A) single frequency signaling (SF)
B) multifrequency signaling (MF)
C) ear-to-mouth signaling (E&M)
D) all are susceptible to these problems most of the time

Question 9

The problem with in-band signaling is that it eats up precious bandwidth on shared trunks.

Question 10

Multifrequency (MF) signaling uses multiple ________ to represent the dialed digits.

Question 11

________ signaling uses a separate wire pair to carry signaling information, thus requiring a four-wire circuit between switches, one pair for normal voice conversation and the other for signaling.

Question 12

Carrier associated signaling is a signaling method in which bit sequences from the digital signal represent signaling states.

Question 13

Which of the following is not a problem associated with carrier associated signaling (CAS)?

A) the ease of placing fraudulent calls
B) the need to turn off the robbed bit signaling function when transmitting high-speed data
C) the inability to carry signaling messages, with special feature information, between switches or between the switch and the telephone
D) none of the above

Question 14

Why is CCS better than in-band signaling methods?

A) the speed at which the call is set up or torn down is reduced
B) fraudulent calls are nearly eliminated
C) it has the ability to carry information from external databases
D) all of the above

Question 15

Signaling system seven (SS-7) and integrated services digital network (ISDN) are forms of carrier associated signaling.

Question 16

Signaling system 7 (SS-7) replaced the ________ standard in the United States in the mid-1980's.

Question 17

SSPs, STPs, and SCPs are connected to one another by ________ circuits.

Question 18

An end-office, tandem, or toll switch of the typical SS-7 network architecture is referred to as the:

A) signaling transfer points (STP)
B) signaling control points (SCP)
C) signaling switch points (SSP)
D) signaling midline points (SMP)

Question 19

Which of the following is not part of the SS-7 message format used to carry information about the call being placed?

A) originating switch address
B) terminating switch address
C) originating telephone number
D) terminating telephone number
E) the next node the message will travel to, with higher level addresses used to direct the message to the correct database
F) none of the above (all are part of the format)

Question 20

The section of SS-7 protocol that establishes the connection through the network and uses the physical node address to rout the message to the appropriate destination is the:

A) TCAP
B) SCCP
C) ISUP
D) MTP

Question 21

The section of SS-7 protocol that uses the called number and calling number to set up and disconnect the call end to end is the:

A) TACP
B) SCCP
C) ISUP
D) MTP

Question 22

The parts of the SS-7 protocol that normally go hand in hand are:

A) MTP and ISUP
B) SCCP and TCAP
C) TACP and MTP
D) ISUP and SCCP
E) all of the above

Question 23

MTP and ISUP are only used when a database needs to be accessed, but TCAP and SCCP are used for normal call connection.

Question 24

ISUP and MTP can function without TCAP or SCCP, and vice versa.

Question 25

Why has ISDN received a lukewarm welcome in the United States?

A) costs of end equipment and upgrades
B) too complicated
C) equipment failures
D) too few technicians have studied it sufficiently to establish familiarity
E) all of the above are factors

Question 26

The advantage of ISDN ________ is that it provides two working channels and one 16 kbps data channel on one pair of copper wire with the two channels completely separate to allow no more than one telephone conversation to take place at the same time on the same wire pair.

Question 27

ISDN ________ is the out-of-band signaling channel used to connect a digital switch to a PBX.

Question 28

ISDN provides a separate signaling channel, the ________ channel, to carry messages between the terminating equipment and the digital switch.

Question 29

The goal of AIN is to define a network that is able to ________ a call at any point in the call process.

Question 30

Local number portability (LNP) means that you can keep your old phone number even if you change providers.

Question 31

Every 800 number has a ten-digit telephone number associated with it and, when called, is routed to that number.

Question 32

________ is the signaling network of the future.

Question 33

Discuss some of the projected capabilities of AIN for the long-term future and tell how these might impact the industry.