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Telecom > Telecom Glossary > Flashcards

Telecom Glossary Flashcards

1
Q

What is an ACD

A

stands for Automatic Call distributor. is usually found in a call center, where calls may come in from anywhere and need to be directed to the next available operator or qued until one is available.

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2
Q

The term used in telecom to describe the capability of peeling off channels from a circuit and routing them elsewhere.

A

Add/drop

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3
Q

Means “the same” Signal that is continuous in amplitude and time. Any small fluctuation of the signal is important. Radio waves, power waves, sound hitting peoples eardrums.

A

Analog

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4
Q

Signal that has a discrete value. If you analyze a sound wave, and then assign a value to each sample of the wave at specific time intervals, you will create this

A

digital

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5
Q

The width of the range of frequencies

A

bandwidth

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6
Q

bandwidth on digital links. the number of possible state transitions per second.

A

throughput

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7
Q

bit error rate test. disruptive tests run on a link to validate the data integrity of the circuit. usually run by putting the remote end of the link in loopback and sending out a special pattern of ones and zeros.

A

bert

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8
Q

types of BERT test

A

QRSS(quasi random signal source), 3 in 24, 1:7 or 1 in 8, Min/max, all ones, all zeros

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9
Q

device used to perform bert testing on a t1

A

T-berd

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10
Q

where phone lines from residences or businesses physically terminate. The first stop when a call is made

A

Central office (co)

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11
Q

Device that separates a t1 into 24 individual analog phone lines, and vice versa

A

channel bank

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12
Q

usually take care of partitioning t1s into analog lines, usually eliminating the need for a channel bank

A

private branch exchange (pbx)

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13
Q

responsible for interfacing with the wan link, and also responsible for interfacing with data equipment such as routers

A

csu/dsu

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14
Q

examples include PBX, phones, routers, and cable modems

A

customer premises equipment (cpe)

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15
Q

allows changes to the way voice channels are connected between trunks, through the use of software

A

daccs - digital access cross connect system

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16
Q

where the telecom providers responsibilities end and yours begin. often telecom closets or similar locations that can be secured to allow access for the telecom providers engineers

A

demarc

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17
Q

1.544 Mbps 24 channels

A

t1 ds1

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18
Q

64 kbps 1 channel

A

ds0 no carrier

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19
Q

6.312 Mbps 96 channels

A

ds2 t2

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20
Q

44.736 Mbps 672 channels

A

ds3 t3

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21
Q

274.176 Mbps 4,032

A

ds4 t4

22
Q

form of digital transmission for voice and data. unlike pots or channelized t1 which uses the voice path for signaling, this uses a separate channel called the data channel for signaling so the remaining channels can be exclusively for voice

A

ISDN integrated services digital network

23
Q

the remaining channels in an isdn used exclusively for voice

A

bearer channels, B-channels

24
Q

the separate channel in an isdn used for signaling

A

data channels, D-channels

25
Q

an ISDN link composed of two 64 kbps bearer channels and one16kbps data channels

A

Basic Rate Interface - BRI

26
Q

an ISDN t1 link composed of twenty-three 64 kbps bearer channels and one 64kbps data channel. Used a lot for connecting PBX systems or dial-up lines.

A

Primary Rate Interface - PRI

27
Q

telephone company that supplies connections between local exchanges provided by local exchange carriers

A

interexchange carrier - IXC

28
Q

geographically defined areas in which a telecom provider can provide local service.

A

LATA - local access and transport area

29
Q

used to describe the amount of time it takes for data to be processed or moved. Has to do with the distance, speed of light, and the amount of time it takes for hardware to process data

A

latency

30
Q

form of latency that is due to a function of physics and cannot be fixed, improved, or otherwise changed

A

propogation delay

31
Q

form of latency which is the time it takes for a device to process information

A

processing delay

32
Q

a phone company that provides local service, as opposed to an IXC

A

local exchange carrier - LEC

33
Q

the copper handoff for a circuit from the telecom facility to your facility. Rarely can be a t1 that may be converted and multiplexed into a larger circuit like a ds3 or sonet circuit. the last mile.

A

Local Loop

34
Q

the act of taking multiple signals and sharing them on a single signal. the act of converting twenty-four 64 kbps channels into a single t1 is an example

A

multiplexing

35
Q

a phone system that offers a phone network to an entity such as an enterprise. Main features include the ability for many phones to share a limited number of public phone lines and the ability to number individual extensions

A

private branch exchange PBX

36
Q

a line that you can plug in a normal analog or fax machine

A

POTS plain old telephone service

37
Q

device that terminates a digital circuit. The phone company can control it remotely, and they offer test points for equipment such as BERT testers

A

Smart jack

38
Q

an ANSI standard for fiber optic transmission systems.

A

SONET - synchronous optical network

39
Q

oc1 line rate and payload rate?

A

line rate 51Mbps payload rate 50mbps

40
Q

oc3 line rate and payload rate?

A

lr 155Mbps pr 150Mbps

41
Q

oc12 line rate and payload rate?

A

lr 622Mbps pr 601Mbps

42
Q

oc48 line rate and payload rate?

A

lr 2488Mbps pr 2405Mbps

43
Q

oc192 line rate and payload rate?

A

lr 9953Mbps pr 9621Mbps

44
Q

oc768 line rate payload rate?

A

lr 39813Mbps pr 38486Mbps

45
Q

generic name for digital multiplexed carrier systems

A

T-carrier - trunk carrier

46
Q

T1 transmission rate and voice channels?

A

tr 1.544Mbps vc 24

47
Q

T1C transmission rate and voice channels?

A

tr 3.152Mbps vc 48

48
Q

T2 transmission rate and voice channels?

A

tr 6.312Mbps vc 96

49
Q

T3 transmission rate and voice channels?

A

tr 44.736Mbps vc 672

50
Q

T4 transmission rate and voice channels?

A

tr 274.176Mbps vc 4032

51
Q

generic term used for any device that will perform BERT tests on a T1.

A

T-Berd - T1 Bit error rate detector

52
Q

multiple channels divided into time slots such as a T1 link

A

TDM - time division multiplexing

Telecom (1 decks)

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