CT3 edited Flashcards Preview

Tech Q's - Care agents cross training. > CT3 edited > Flashcards

Flashcards in CT3 edited Deck (260):
1

Aspect ratio of HDTV

16:9

2

Preferred method of coax cable routing

Home Run

3

What is CRT?

cathode ray tube

4

What does REN stand for?

Ring equivalency number

5

DOCSIS

Data Over Cable Services Interface Specification

6

What ensures interoperability of cable modems from various manufacturers?

DOCSIS

7

What does MoCA stand for?

Multimedia over Coax Alliance

8

Name four COMCAST business services

TV
Phone
Internet
Teleworker

9

What is the delay between transmission and arrival of a packet?

latency

10

What is it called when packets are received in the wrong order?

jitter

11

In general, business customers sign a __ to __ year contract.

2 to 5

12

What does the term POTS mean?

Plain Old Telephone System

13

What is the name of the dial tone a customer will hear when they have voicemail?

stutter

14

what does CMTS stand for?

Cable Modem Termination System

15

What does EDTV stand for?

Enhanced Definition TV

16

What is the resolution of EDTV?

480p

17

What does eMTA stand for?

embedded mutimedia terminal adapter

18

All lights flashing on an eMTA indicate what type of problem?

Foreign Voltage

19

What does VOIP stand for?

Voice Over Internet Protocol

20

Internet phone services transmit calls over a ______ network.

Public

21

What connection type provides both audio and video?

HDMI

22

What is DHCP?

Dynamic Host Configuration Protocol

23

What is QAM?

Quadrature Amplitude Modulation

24

List 2 types of call forwarding.

Selective
Variable

25

What is the 4 step troubleshooting process?

Identify
Isolate
Repair
Verify

26

5 factors of attenuation

Diameter of center conductor
Dielectric
Frequency
Temperature
Length of cable

27

Passage of outside signal into the cable is known as what?

Ingress

28

Signal leaking out of the system is known as what?

Egress

29

What are the three main components of a home theater system?

Audio
Video
Environment

30

List the 4 main types of displays

Direct view
Rear Projection
Front projection
Flat Panel

31

Latent or out of sync audio is known as?

Lip sync

32

MPEG identifies and removes what type of information between successive frames of the picture?

Redundant / Static

33

Separating successive frames into two types of video information is also known as what?

compression

34

What is a rugged, inexpensive to repair bandwidth versatile transmission medium?

Coaxial cable

35

A home run system is also known as what?

Star topology

36

What does DLNA stand for?

Digital Living Network Alliance

37

What are the 3 troubleshooting areas in CDV?

Before eMTA
At eMTA
After eMTA

38

What numbers do you need to dial in order to place an international call?

011 + country code

39

DHCP

Dynamic Host Configuration Protocol

40

What is the measure of voice, data and or video quality provided to a customer called?

Quality of Service (QoS)

41

List 2 safety precautions to take before working on phone lines.

Disconnect ILEC
Disconnect eMTA

42

When an eMTA is upgrading firmware what lights are flashing?

U/S and D/S

43

If the power light is flashing on an eMTA it indicates what?

AC power failure

44

ILEC

Incumbent Local Exchange Carrier

45

What defines where COMCAST may physically disconnect a customer from the ILEC network?

Interconnection Agreement

46

Businesses can add what services a la carte?

HD
Music Choice
Multi Latino
Sports Packages

47

What is an internet product for companies that have a mobile workforce?

Teleworker

48

How many email addresses are available to a teleworker customer?

7

49

How would a teleworker customer add or disconnect accounts?

Teleworker order center

50

What DOCSIS standard brought about channel bonding and IPv6?

DOCSIS 3.0

51

Connect RF to power in order to prevent what?

Ranging

52

The number one cause of ingress and egress occurs where in the system?

Drop system

53

The number 1 cause of ingress and egress?

Poorly installed connectors

54

CPE

Customer Premise Equipment

55

What audio format has 4 channels: Left, Right, Center, Surrounds

Dolby Pro Logic

56

3 types of audio formats with 5.1 channels.

DTS Neo:6
Dolby Digital
DTS

57

What essential supplies are needed for an Xfinity Internet installation?

Modem, cable installation materials (coaxial cable and splitters), welcome kits, ethernet cables

58

What are the installation options for Xfinity Internet?

Self installation and professional installation

59

What should the work order contain prior to installation?

Customer's name and address, account number, current comcast services, information specific to the order, modem information (including correct rate codes for modem installation), comcast.net username

60

What essential supplies are needed for an Xfinity Internet installation?

Modem, cable installation materials (coaxial cable and splitters), welcome kits, ethernet cables

61

What is a bit?

a single character of data

62

What is a Byte (B)?

8 bits, a larger amount of data but still not very large.

63

What is a Kilobit (Kb)?

Roughly 1000 bits. Many Internet applications measure speed in kilobits

64

What is a Gigabyte (GB)?

Roughly one thousand megabytes. Gigabytes are common when talking about hard drive storage.

65

What is a Megabit (Mb)?

Roughly one million bits. This is smaller than a megabyte, but is a common measurement for network bandwidth.

66

Projects light from microscopic mirrors onto big, widescreen, rear-projection TVs (or micro-displays)

Digital Light Processing(DLP)

67

What is the Pre-installation internet requirement to installing a CT3 cablecard in a PC?

An Internet connection MUST BE working prior to installation.

68

Boosts low level signals from the components to the speakers.

Amplifier

69

Images result when electrically charged gases illuminate colored phosphors

Plasma

70

What type of cable fulfills the video requirement for an internal or external xfinity TV user?

A/B USB cable.

71

What is a Gigabyte (GB)?

Roughly one thousand megabytes. Gigabytes are common when talking about hard drive storage.

72

Includes audio and video input/output ports; Audio input to AV receivers internal preamplifier; Audio output fed to system speakers; Video for selected device is fed from the receivers output jacks to connected video display

Audio/Video Receiver

73

What is the requirement PRIOR to installing a CT3 cablecard in a PC?

An Internet connection MUST BE working prior to installation.

74

Toslink or EIA-J are types of what?

Optical Digital Audio connectors

75

Uses an RCA connector to carry Digital Audio

Coaxial Digital connection

76

Uses an RCA connector to Analog Audio

Stereo Connection

77

Creates a picture by shooting an electronic beam at a phosphor-coated glass screen

Cathode Ray Tube (CRT)

78

Creates images by passing light through a layer of liquid crystal sandwiched between two panes of polarized glass.

Liquid Crystal Display(LCD)

79

Allows customers to link home TVs from any PC or hand-held device

Slingbox

80

Uses LED backlighting instead of the cold cathode fluorescents CCFL

LED-backlit LCD

81

A general term for non-projection types of TVs, which include conventional tube TVs and flat-panel plasma and LCD TVs

Direct View TV

82

Changes the size of an image to fit the pixel size of a device without changing the shape

Scaler

83

Operates with beam of infrared light; components must be in line of sight with remote

Infrared Remote

84

Consisting of a separate projector (typically placed on a table or ceiling-mounted) and screen; Can display images up to 20 feet across, or larger

Front Projection

85

Ideal if there is little or no space for a TV or projector; Can be hung on the wall; Can be plasma or LCD

Flat Panel

86

What is the pre-installation video requirement for a CT3 cablecard?

A) An internal or external xfinity TV Tuner

87

Just launched by Comcast, these remotes talk to the STB via RF while using infrared to talk to the TV.

IR/RF Remote(XR2)

88

Large 24-pin connector in which audio is not provided

DVI

89

4-pin video only connector

S-Video

90

RCA wiring that uses Yellow Red and White connectors

Composite video

91

Improves picture quality; Makes routing and distribution easier; Allows images to be displayed in different ways

Signal Processor

92

Enables multiple video and audio signals to be selected and sent to one or more display devices

Switcher

93

What type of cable fulfills the video requirement for an internal or external xfinity TV user?

An A/B USB cable.

94

Operate components located throughout the household; Generates signals of given radio frequency

RF Remotes

95

Control all components; Can be programmed for individual components (uses 3 or 4 digit codes)

Universal Remotes

96

Perform operations on more than one component; can usually learn commands

Programmable Remotes

97

Control all components; Can be programmed for individual components (uses 3 or 4 digit codes)

Universal Remotes

98

Perform operations on more than one component; can usually learn commands

Programmable Remotes

99

Just launched by Comcast,these remotes talk to the STB via RF while using infrared to talk to the TV.

IR/RF Remote(XR2)

100

How far should seating be away from TV for Optimum viewing in a Home Theater setup?

Seating should be two times the diagonal wide-screen TV away from TV (example: seating should be 84" away from a 42" TV screen)

101

Name 4 of the 6 equipment requirements for an external digital cable tuner setup.

1) Windows Vista Home Premium or Ultimate Edition2) Vista digital cable compatible PC3) DVD-ROM Drive4) Audio Output Capabilities5) Internet Access6) Internal or External Xfinity TV Tuner with remote

102

Most trouble calls, including repeat trouble calls, in the CATV industry are found where?

Between the tap port and the customer's television set.

103

The majority of troubles calls are due to what?

Poor connector installation or device attachments.

104

What types of problems can poorly installed F-Connectors cause the customer?

Tiling
"One Moment Please" message
Ghosting
Distorted picture (hum)
Intermittent service

105

The Top 5 Types of Connector Problems

1. Moisture damage
2. Long/short center conductor
3. Connector not tightened to port
4. Braid removed or too short/long
5. Improper connector for cable type

106

Why is it improper to cut a center conductor a second time to (trim it) to fit a fitting?

A jagged center conductor can scratch the contacts inside the F-port creating reflections.

107

What is the web address for most Comcast modems and eMTAs

http://192.168.100.1

108

what are four benefits to an employer who uses teleworker?

Single contract, unified billing, online ordering and management, business class customer support

109

what are four benefits of teleworker for employees?

Multiple connections, comcast.net email, after hours use, Portal services

110

how any levels of teleworkers are there?

2

111

what are the names of of the two levels of teleworker?

Standard and enhanced

112

what is the major difference between the two teleworker service levels?

speed

113

how does a technician know the a teleworker customer from a CHSI customer?

the work order

114

what paper work does a technician give a teleworker at the end of the install?

None

115

RF:

RF or Radio Frequency refers to an electromagnetic wave that generally falls in the frequency range of 3 kHz to 300 GHz.

116

MHz (Megahertz):

Equal to one million Hz. Video signal bandwidth is typically expressed in megahertz

117

A subunit of a larger unit called the bel:

decibel

118

Is a measure of the ability of a circuit (often an amplifier) to increase the power or amplitude of a signal from the input to the output

Gain

119

A network architecture developed by the cable industry, which typically uses fiber optic cables to bring signals to selected areas of the system called nodes, which are usually based on the number of subscribers to be served

Hybrid Fiber Coax (HFC)

120

An advantage of fiber is:

It has bandwidth many times greater than coaxial cable and can travel great distances without amplification

121

The width of a band of frequencies

Bandwidth

122

Passage of an outside signal into the cable; can result in noise and disruption of the desired signal

Ingress

123

A standard for home entertainment networking in which existing subscriber drop coaxial cabling and components are used to interconnect set-top boxes

MoCA

124

Allows up to 16 devices on the network, with a maximum of 300 feet of cable

MoCA 1.1

125

To ensure that MoCA energy remains within the home, the CommTech 3 must install a __________ in the drop

POE filter

126

Three main features of OWE:

First Time User Experience (FTUE)
XFINITY Profile
Progress Bar

127

The residential services are:

XFINITY TV
XFINITY Voice
XFINITY Internet
XFINITY Home

128

Xfinity apps

XFINITY My Account App
XFINITY TV App
XFINITY TV Go App
XFINITY TV Remote App
XFINITY TV X1 Remote App
XFINITY Connect App
XFINITY Home App
XFINITY Player App
XFINITY Remote App
XFINITY Wi-Fi App
XFINITY Share App
XFINITY on Campus App
XFINITY On Demand Purchases App

129

Suite of applications that enable customers to enjoy the services they have from Comcast on as many platforms as possible

Converged Products:

130

Allows customers to make outgoing calls via a virtual telephone number using a mobile device without using wireless minutes

Voice 2go

131

There are three significant considerations in a Home Theater application

Audio quality
Audio formats
Audio equipment

132

Latent or out-of-sync audio

Lip-Sync

133

The different types of audio formats are:

Mono
Stereo
Surround Sound

134

Key elements of a surround sound system are:

Pre-amplifier
Power Amplifier
Surround Sound
Processor
Audio/Video Receiver

135

Tiny dots that convey light and combine to form a video picture

Pixel

136

Short for "picture element."

Pixel

137

The number of scans from the left side of the display to the right and back that occur in one second

Horizontal Scan Rate

138

The number of times per second that the scan sequence is repeated from the top of the display

Vertical Scan Rate

139

Visible fading of luminance between scan cycles on video displays

Flicker

140

The method of displaying television pictures in which the picture is displayed in two halves (one of odd-numbered lines, one of even-numbered lines), that are interlaced together to create the full picture

Interlaced scanning

141

Standard television pictures are composed of ___ horizontal lines that scan across the screen in less than the blink of an eye

480

142

The ____ format utilizes two sequential fields of 540 lines each

1080i

143

Interlacing produces __ fields or __ complete frames every second

6030

144

Television pictures are displayed in a single pass, instead of the two fields used with interlaced scanning

progressive scanning

145

The common progressive scan standards that you will see are:

480p, 720p, and 1080p

146

Identifies and removes redundant information between successive frames of the picture

MPEG compression

147

Separating successive frames into two types of video information—that which remains unchanged from frame to frame, and that which is updated frame to frame

Digital Compression

148

The most important part of a Home Theater system is the?

video display

149

The three main steps involved in site preparation when installing new equipment in a customers home are:

Determining customer expectations
Analyzing the current setup
Planning the signal flow

150

A common problem with Home Theater systems is:

no picture or poor picture

151

The most common causes of picture failure in a Home Theater system are:

Wrong display settings.Lack of power to various components.Cable routing malfunction, loose or disconnected cables

152

The transfer of energy from one device to another is most successful when both devices are of the same

Impedance

153

Three components of an electrical circuit:

Voltage
Current
Resistance

154

German physicist, investigated galvanic currents and established the mathematical relationship between voltage, current, and resistance

Georg Simon Ohm

155

A flow of IP data supplied to a processor at a rate fast enough forreal-time decoding

Streaming

156

Enables media files—movies, TV shows, music, and so on—to be played on TV, from various sources like computers, hard drives, the Internet, and media servers

Home Media Streaming

157

An all-in-one device that connects the customer’s Internet, phone, and home networking, enabling them to share files with computers and other electronic products that are connected to their home network

Wireless Gateway

158

A term used in IP telephony for methodologies and transmission techniques that manage the delivery of voice, using IP packets

Voice over Internet Protocol (VoIP)

159

What are 3 ways to access voicemail?

1. Dial *99
2. Dial home telephone number
3. Online, through XFINITY Connect

160

A customer can access Enhanced Voicemail while away from home bypressing

#, once the greeting begins

161

Customers can easily check their email, listen to voicemail, and manage their address book and calendar from any computer with an internet connection.

XFINITY Connect

162

XFINITY Connect allows customers to:

Review call history, Easily manage everything related to their account without calling Customer Service

163

How customers can access XFINITY Connect:

If a customer has XFINITY Internet and XFINITY Voice, the login is their primary email username and password.If a customer is only subscribing to XFINITY Voice, the login will be the XFINITY Voice 10-digit home telephone number and voicemail password.For a new voicemail setup, simply dial *99, the system will prompt you to create a new passcode. Note, the last four digits of the telephone number is NO LONGER the default passcode.

164

website to access Xfinity Connect

https://login.comcast.net/login

165

Phone service that transmits telephone calls over a public network, such as the Internet

IP Telephony

166

A term used in IP telephony for methodologies and transmission techniques that manage the delivery of voice, using IP packets

VoIP

167

Technology used to transmit voice and related calls over a data network

IP Phone/IP Voice

168

A device that allows the telephone company to route and connect customers to one another

Telephone Switch

169

Worldwide network of public circuit-switches used by traditional, local, and long-distance companies

Public Switched Telephone Network (PSTN)

170

Central Office (CO) server that routes calls to other IP-based phones or through the PSTN

Soft switch (Software Switch, VoIP Switch, or CMS)

171

A telephone line dedicated to a specific subscriber. This line sends signals through the system, based on a subscriber making and receiving calls.

Subscriber Line

172

A site where telecommunications companies (such as cellular and long-distance providers) physically interconnect their systems with other networks (such as local telephone companies or cable companies)

Point of Presence (POP)

173

A condition caused when packets are not received in the correct order, or when they take too long to arrive at their destination.

Jitter

174

Delay associated with inconsistencies, or impairments, in the data transport stream.

Latency

175

Voice packets are given priority over other types of data traveling within the Comcast network. This managed delivery ensures high-quality voice packet interpretation.

Dynamic Quality of Service (DQoS)

176

The only time a call from an XFINITY Voice customer may use the public Internet is when the receiving party is using an ______________________.

internet-based service

177

In legacy telephone networks, talk battery and ring voltage come from the?

Central Office

178

Always disconnect the inside wire (IW) from the_________ before working on the wiring.

NID or eMTA

179

Also known as Touch-Tone, this form of audio signaling was introduced by Western Electric in 1963

DTMF: Dual-tone multi-frequency signaling

180

In earlier pulse dialing systems, noise generated in the copper pairs could be interpreted as a pulse by the switch rendering:

Wrong telephone numbers

181

An eMTA features up to ____ hours talk time and up to _____ hours of standby battery

five
seven

182

When utilizing an in-house amplifier, the eMTA must be connected to a:

passive port

183

If the customer has opted for a backup battery, it is recommended that they also have a ___________ on hand, in the event of a power outage.

wired phone

184

eMTA Location Guidelines

Place near customer's primary computer, if possible.
Do not place eMTA in an attic or unheated basement space.Do not place the eMTA too close to a furnace or in any other area that is environmentally unsuitable for the unit. Keep away from wireless devices, and access by children or pets.Ensure adequate ventilation

185

Do not place an in-home amplifier between the tap and the eMTA unless the amplifier has an approved:

eMTA port

186

eMTA battery provides _____________ hours of standby time in case of power outage

five to seven, 6-8 hours.

187

Backup batteries will not be available for purchase from Comcast by customers subscribing to:

“Unlimited Select.”

188

All of a sudden, the eMTA Link lamp or LED goes off. What could be the reason?

Ethernet cable disconnected, or computer has been powereddown. Possibly the router has lost power

189

Name two ways to discourage the customer from unplugging the eMTA from a dual jack when they are trying to unplug their phone.

Wire in such a manner that the eMTA is plugged into the bottom jack to minimize accidental disconnection. Use a red "Do not remove" tag to block the unused port

190

Once the eMTA is hooked up, you can access a GUI to check signal levels by using:

192.168.100.1

191

The twists in Category 3,5 and 6 wire help prevent __________ and cancel out noise that might be induced onto the wire from adjacent pairs or exposed wire.

cross talk

192

When a fax machine is used with XFINITY Voice, the fax machine will:

Share the incoming phone line

193

In a home-run wiring configuration, also known as ____, each outlet is fed directly from a central location

star

194

Only _________ alarm systems should be connected to the phone service

monitored

195

Allows an alarm panel to control access to active phone pairs, and seize those pairs even if the customer is using the telephone

Line seizure

196

Be sure that the alarm system is in ________ before beginning work, to ensure that an alarm is not triggered

Test Mode

197

Some ILECs utilize "______________," a service that keeps talk battery on the pairs even if the location no longer subscribes to their phone service

soft dial tone

198

Before the eMTA can be connected to the customer’s home wiring, the existing service must be disconnected at the?

NID

199

Unplugging the modular connector in the NID is a safety step. It prevents?

being hit by ring voltage

200

What is the preferred method of connecting the eMTA to the house wiring?

Disconnect the ILEC and connect the eMTA with a dedicated line to the NID

201

An _____ jack isolates the alarm panel from the eMTA in the telephone circuit.

RJ31X

202

In a phone installation with an alarm system, a _________ _____ _____ is always the first active device in the telephone circuit

monitored alarm panel

203

Rule of Three for XFINITY Voice:

1. Confirm the customer’s new telephone number.
2. Illustrate how to use voicemail, referencing the steps in the Welcome Kit.
3. Talk about XFINITY Connect where customers can go online to check voicemail, see call history, or set options

204

There are three methods for activating XFINITY Voice services. They are (in order of preference):

1. Via the workforce management application on the company-issued mobile device or laptop
2. Via the Online Tech Activation Tool, using the customer’s computer
3. Via the Interactive Voice Response (IVR).

205

Often called Cable Modem MAC, is typically used when provisioning an installation for both XFINITY Voice and Internet

CMAC

206

Refers to the telephone only portion of the eMTA. It is typically used for provisioning XFINITY Voice when using the IVR

MTA-MAC

207

MAC address added to the customer's account in CSG/ACSR markets

CMAC

208

Typically used for provisioning XFINITY Voice when using the IVR.

MTA-MAC

209

Used for provisioning via the mobile device in AMDOCS/Comtrac/Cable Data markets

The serial number

210

An eMTA or modem that has not been activated receives a ____________boot file which allows it to communicate with our network but not surf the Internet

walled garden

211

After activation the first test call:

verifies inbound calling, long distance, and calling features

212

After activation and placing the first test call, keep the first test call connected and prompt a second test call to validate:

call waiting and voicemail

213

If a password is required, to validate voice mail, use?

the last four digits of the telephone number

214

There are three categories that can help us determine where an XFINITY Voice problem may occur

RF or coax
Copper wiring or jacks
The eMTA

215

Keenness and depth of perception, discernment, or discrimination especially in practical matters

Acumen

216

The ability to make good judgments and quick decisions, typically in a particular domain

Business acumen

217

The Comcast Credo

"We will deliver a superior experience to our customers every day. Our products will be the best and we will offer the most customer-friendly and reliable service in the market."

218

Two versions of Business TV:

Private View
Public View

219

Typically private/professional businesses where food and/or alcohol is not sold for immediate consumption/not the main source of revenue.

Private View

220

Includes, but is not limited to, locations where the bulk of the revenue is derived from the sale of food and/or alcohol

Public View

221

Some services available to Residential customers are excluded in Business Services. The excluded services are:

DVR
VOD
Impulse PPV (IPPV)
Premium channels

222

Business TV is not available to venues that:

Charge an admission or entry fee. (However, a monthly or yearly membership is not considered as admission fee. Thus, Business TV is made available to health clubs or special interest clubs.)

223

Service levels for Business TV Private View:

Business TV Basic
Business TV Information & Entertainment
Business TV Standard
Business TV Preferred

224

Business customers are required to sign a ______________________ in order to establish service.

service order agreement/contract

225

Service levels for Business TV Public View:

Basic
Digital Basic Plus
Digital Standard
Digital Deluxe
Sports & Entertainment Standard
Sports & Entertainment Deluxe

226

There are three major music licensing organizations which provide the rights for businesses to play licensed recordings:

ASCA
PBM
ISESAC

227

Benefits of bundling

Flexible
One service provider
Efficient
Cost effective
Peace of mind

228

Most VoIP service providers use the _____________(Internet Phone) to carry phone traffic; Comcast does not.

public Internet

229

Business Voice is transported over _____________________________, giving customers the clarity they expect.

Comcast’s private, advanced broadband network

230

Business Voice Service Capabilities & Customer Support

Operator Assistance
Directory Assistance
Call Restrictions
E911 Emergency Calls
Do-Not-Call Registry
Directory Listings

231

Features that are available only to Business customers:

Call Forward No Answer
Hunt Groups
Extension Dialing

232

A serviceability check consist of two components:

1. Serviceability of the location
2. E911 serviceability

233

The demarcation point for Small Business Voice services is?

The RJ telephone connector on the back of the eMTA

234

When installing Business Voice, always use a?

dedicated eMTA
The Ethernet port should not be used for Internet service

235

Metro Ethernet (Metro-e) customers can select one of the three Classes of Service (CoS) that best meets their applications’ performance requirements:

1. Basic
2. Priority
3. Premium

236

What is the speed range for Metro-e?

1Mbps–10Gbps

237

What website would you direct a customer to for anything business class related?

http://business.comcast.com/

238

Business Internet Customer Support a technician can be dispatched within ______, including on weekends and holidays

4 hours

239

Combines the functions of a cable modem and a router in a single device

IP gateway

240

It is the process of modifying IP address information in IPv4 headers

NAT

241

Some routers come with a ___________option which, when enabled, essentially disables the networking functionality and the gateway basically becomes a modem.

Bridge Mode

242

Managed Internet access, available to corporations that have a distributed, mobile workforce of at least 100 persons

Teleworker Internet

243

DOCSIS 1.0 issued

March 1997

244

DOCSIS 1.1 added full standardization and quality of service capabilities

April 1999

245

DOCSIS 2.0 released, to meet the demand for enhanced upstream transmission speeds

December 2001

246

DOCSIS 3.0 released; it supported enhanced upstream and downstream transmission speeds and Internet Protocol version 6 (IPv6).

August 2006

247

Aims to support capacities of at least 10Gbit/s downstream and 1Gbit/s upstream

DOCSIS 3.1

248

Technology that allows multiple cable boxes to utilize a single radio channel. Each box is assigned a code for its upstream bit stream

S-CDMA: Synchronous - Code Division Multiple Access

249

Load-sharing technique for logically combiningmultiple DOCSIS channels

Channel Bonding

250

Electromagnetic wave that generally falls in the frequency range of 3 kHz to 300 GHz

RF or Radio Frequency

251

A protocol for assigning dynamic IP addresses to devices on a network

Dynamic Host Configuration Protocol (DHCP)

252

The modem scans the downstream QAM channels, looking for an upstream channel descriptor. A __ occurs if the cable modem does not find one within a few seconds

T1

253

The modem waits for an opportunity to communicate with the CMTS. If it does not get an opportunity within about 12 seconds, a __ timeout occurs.

T2

254

The cable modem has sent a ranging request upstream to the CMTS for transmit and timing information. If the modem does not get a response within 200 milliseconds, a __ Timeout occurs. After 16 attempts, the modem will reboot to restart the registration process from the beginning.

T3

255

Once a cable modem is online, it continues to communicate with the CMTS. The modem watches for Keep Alive requests from the CMTS. If it does not receive one after 30 seconds, a __ timeout occurs.

T4

256

After __ T4s, the cable modem will reset

16

257

T3 and T4 timeouts can be a sign of an

upstream or downstream problem

258

A feature in Scout that shows the presence or absence of linear distortions in the RF portion of the return path

Scout Flux

259

Cable modems communicate with the CMTS every _________ to characterize network conditions

20 seconds

260

The adaptive equalizers are sent fresh commands for equalization every?

20 seconds