CT3 edited Flashcards
1
Q
Aspect ratio of HDTV
A
16:9
2
Q
Preferred method of coax cable routing
A
Home Run
3
Q
What is CRT?
A
cathode ray tube
4
Q
What does REN stand for?
A
Ring equivalency number
5
Q
DOCSIS
A
Data Over Cable Services Interface Specification
6
Q
What ensures interoperability of cable modems from various manufacturers?
A
DOCSIS
7
Q
What does MoCA stand for?
A
Multimedia over Coax Alliance
8
Q
Name four COMCAST business services
A
TV
Phone
Internet
Teleworker
9
Q
What is the delay between transmission and arrival of a packet?
A
latency
10
Q
What is it called when packets are received in the wrong order?
A
jitter
11
Q
In general, business customers sign a __ to __ year contract.
A
2 to 5
12
Q
What does the term POTS mean?
A
Plain Old Telephone System
13
Q
What is the name of the dial tone a customer will hear when they have voicemail?
A
stutter
14
Q
what does CMTS stand for?
A
Cable Modem Termination System
15
Q
What does EDTV stand for?
A
Enhanced Definition TV
16
Q
What is the resolution of EDTV?
A
480p
17
Q
What does eMTA stand for?
A
embedded mutimedia terminal adapter
18
Q
All lights flashing on an eMTA indicate what type of problem?
A
Foreign Voltage
19
Q
What does VOIP stand for?
A
Voice Over Internet Protocol
20
Q
Internet phone services transmit calls over a ______ network.
A
Public
21
Q
What connection type provides both audio and video?
A
HDMI
22
Q
What is DHCP?
A
Dynamic Host Configuration Protocol
23
Q
What is QAM?
A
Quadrature Amplitude Modulation
24
Q
List 2 types of call forwarding.
A
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
