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IP Telephony (IAN) > Chapters 1 & 2 > Flashcards

Chapters 1 & 2 Flashcards

1
Q

An analog circuit is composed of what two things?

A

Wires

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2
Q

The ground is on which part of the wire in Analog phones?

A

Just the tip

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3
Q

Aside from the ground, what is the other part of the analog voice wire?

A

The battery (positive) ring

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4
Q

What is glare?

A

The phone is picked up at the same time as a call comes through before it rings

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5
Q

When a telephone has buttons that when pushed directly access an outside line it is using what?

A

A Key System

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6
Q

What is used to carry multiple digital voice conversations?

A

Time Division Multiplexing

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7
Q

T1 lines can carry up to __ separate __Kbps channels

A

24, 64

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8
Q

Channel Associated Signaling uses the _th bit of every _th frame

A

8, 6

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9
Q

What is PBX?

A

Private Branch Exchange

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10
Q

Ground Start Signaling reduces what common problem?

A

Glare

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11
Q

How does Ground Start Signaling work to reduce glare?

A

Phones don’t receive a dial tone until the phone company receives a ground signal

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12
Q

What type of signaling communicates the state of a telephony device?

A

Supervisory

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13
Q

What type of signaling is used when you dial numbers on a phone?

A

Address signaling

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14
Q

When you pick up the phone, the phone is now ___ hook

A

Off hook

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15
Q

Rotary telephones use what type of dialing?

A

Pulse

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16
Q

Modern telephones use what type of dialing?

A

Dual-tone multi-frequency

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17
Q

What type of system would be used by Telco companies for billing purposes?

A

Signaling System 7 (SS7)

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18
Q

With a PBX, how would you access outside trunks from a phone?

A

Most systems use 9, then the number. However that number can be changed.

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19
Q

In a PSTN, where is the local loop?

A

The link between the customer premises and the telco provider

20
Q

What device allows businesses to operate a “miniture PSTN” inside of it’s company?

A

Private Switch (PBX)

21
Q

Canada and USA use what numbering plan?

A

North American Numbering Plan (NANP)

22
Q

How many digits are in a NANP number?

A

10

23
Q

[True or False] This NANP number is valid 180-558-1205

A

No, the area code cannot start with a 0 or a 1

24
Q

In NANP, what are ERC numbers?

A

Area codes where the second and third digits are the same.

25
Q

In NANP, you first dial what to place an international call?

A

011

26
Q

What number range is reserved for people that are deaf or hard of hearing (use TTY lines)

A

800-XXXX to 855-XXXX

27
Q

What is special about 555-01XX numbers?

A

They are fictitious

28
Q

In the Hong Kong numbering plan, numbers that start with _ or _ are Cell phones?

A

6 or 9

29
Q

How many digits can a E.164 number be?

A

15

30
Q

Who developed the E.164 numbering plan?

A

The ITU (Part of the UN)

31
Q

The process of converting analog waves into digital values is called?

A

Quantization

32
Q

North American and Japan use what version of G.711?

A

μ-law

33
Q

The primary difference between G.711 and G.729 is?

A

G.711 is uncompressed, while G.729 is.

34
Q

G.729b added what feature?

A

Voice Activity Detection

35
Q

RTP uses what port?

A

Port 1600

36
Q

RTCP uses what port?

A

Port 1601

37
Q

What is RTCP used for?

A

Statistics about the RTP connection

38
Q

[True or False] RTP streams are two-way

A

False

39
Q

A CUCM Cluster is composed of what two types of devices?

A

Publisher and Subscribers

40
Q

The UC400 supports a maximum of __ phones

A

48

41
Q

The biggest downside to the Cisco Unified Communications Manager Business Edition is?

A

It’s not scaleable

42
Q

Cisco Unity Express provides what major feature to users?

A

Voice Mail

43
Q

Cisco Call Manager Express can have how many users?

A

Up to 450

44
Q

Cisco Unified Communications Manager Business Edition can have how many users?

A

1,000

45
Q

Cisco Unifies Communication Manager can have how many users?

A

40,000

46
Q

Cisco Unity Connection can have how many users?

A

20,000

IP Telephony (IAN) (8 decks)

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