cct4 Flashcards
What are benefits of a Key System (PBX)?
1.Allows a group of phone stations to access a common set of phone lines2.Fewer business lines can be purchased3.Additional built in features such as music on hold and call transfer
This device enables operators to deliver * lines of telephony, tiered data and other advanced Internet Protocol services
eMTA
What is the wiring pattern for a 66 Block- Telco standard connecting block?
a.Lines in from the left and out to the rightb.lead with “Tip” at the topc.Alternate “Tip” and “Ring”d. Leave 1-3 feet of excess wire around block
In BCDV, it’s the interface between the eMTA and the 66/110 block demarc point
RJ-21X
Standard interface for connecting multiple line telephone equipment
RJ-21X
It’s used to avoid kinks and sharp bends on telecom equipment boards
Mushroom Spool
It uses internal modem to transmit sales transaction data using telephone lines.
P.o.S. (Point of Sale System)
It’s Output is 48 VDC,50 Watts,It has 18 Hour Backup with TM508 Idle,and 8 Hour Backup with all 8 lines in use.
Local Power Supply Unit
The Large Plug on an 8 line eMTA that connects to the power supply.
Telemetry
What is the color sequence for the Telemetry Plug on an 8 line eMTA?
White-Brown-Blue-Orange-Green
It deletes unused channel and inserts local feed for subscription channel or other video feed such as cameras or promotional video loop/
Channel Deletion Filter and Combiner
Loads baseband signal onto standard video channel carrier. Can eliminate the need for multiple DCT’s.
Video Modulator
Connects to the combiner in the filter for local insertion of subscription channel
DCT
What is the demarcation point for Commercial Video?
Tap (if there is a tap in a communications room)Groundblock (if there’s only a ground block at the site.)
Equipment from a Telephone Company, providing internet access to the customer
DSL Modem
Device that connects the customer’sinternal network to the Internet. Wirelesscapability may be denoted by antennae on the device
Router
Device that acts as a focal point inconnecting multiple computers within oneLocal Area Network (LAN).
Switch
“A managed hard drive connected toa LAN that can be accessible by anyoneon the Internet as defined by a company’sNetwork Administrator.
Network Attached Storage (NAS)
Similar to a 66 block, but providesless interference and is also certified fordata networks
110 Punch Down Connecting Block
This is the LEC network interfacethat supplies 1.54Mb/Sec symmetricaldata throughput.
T1
In its simplest form, it is an electronic message sent from one device to another.
A protocol used on the Internet for exchanging files
FTP
The customer must have a Comcast issued IP Gateway to receive this type of IP address
static
This type of IP address is visible to the public
routable
A descriptive name for an address or group of addresses on the internet
Domain Name
Internet service that locates and translates domain names into IP addresses
DNS
A location for passing data in and out of your computer
port
10.0.0.0 is an example of a _______ address.
Private IP
A unique number for each computer on a given network
IP Address
A temporary IP address is also called a(n) _________ IP address.
dynamic
An IP address that does not change.
static IP address
a system of computers,peripherals, terminals, and databases connected by communications lines
Network
A geographically close set of computers connected on a single network and using the same communication device
LAN
It can be as small as a home network with 2 computers, or anoffice with hundreds of computers that share access to printers, programs and a connection to theinternet.
LAN
A group of computersgeographically far apart, but areconnected.
WAN
Uses a public network, such as the internet, to establish a secure connection to an organization’s private network
VPN
A technique by which several hostsor computers share a single IPaddress for access to the Internet.
(NAT) Network Address Translation
This enables a LAN to use one setof IP addresses for internal trafficand a second set of addresses forexternal traffic, and provides atype of firewall by hiding internalIP addresses.
(NAT) Network Address Translation
Similar to NAT, but a more specific tool. It forwards requests for a particular IP port pair to another IP port pair
(PAT) Port Address Translation
This feature is commonly used onpublicly connected hosts to makean internal service available to alarger network.
(PAT) Port Address Translation
It is the concept of partitioning large networks into smaller segments.
Subnetworking, or subnetting
A portion of a network that shares a common address component..
Subnet
On TCP/IP networks, they are defined as all devices whose IP addresses have the same prefix
subnets
Look at this IP address. 150.215.017.009What do the first two numbers (150.215) represent?
They define the network
Look at this IP address. 150.215.017.009What do the last two numbers (017.009) represent?
They define a device or a particular host on the network
(the lowest in value) this IP addressencompasses the entire subnetwork.
Network IP
This IP address is used on customer’s equipment.
Routable IP
This address (the highest in value)- identifies all hosts/devices on the LAN.
Broadcast IP
This subnet is for customers with 1 Static IP (one static, publicly routable IP address)
/30 subnet
The /30 subnet mask is
255.255.255.252
How many IP addresses are in a /30 subnet mask?
4
This Subnet is for customers with five Static IPs (five static, publicly routable IP address)
/29 subnet
The /29 Subnet uses how many IP addresses?
8
The /29 subnet mask is
255.255.255.248
This Subnet is for customers with 13 Static IPs (13 static, publicly routable IP addresses)
/28
How many IP Addresses does a /28 Subnet use?
16
The /28 subnet mask is
255.255.255.240
This allows users to privately share information over public communication
VPN / Virtual Private Network
What are the two gateway configuration options for a customer with a VPN endpoint?
- Assign a Static IP to the customer’s device2. Configure Port Forwarding on the IP Gateway
software/hardware used to preventunauthorized access from a computer system or network ofcomputer systems
Firewall
This allows a selected computer tobypass the firewall features of thegateway and permits unrestrictedaccess from the Internet to thatcomputer
DMZ (demilitarized zone)
This feature is commonly used forgaming and videoconferencing –applications that will not functionthrough NAT.
DMZ (demilitarized zone)
A utility to determine whether aspecific IP address is accessible. Itsends a packet to the specifiedaddress and waits for a reply.
Ping
A utility that traces a packet fromyour computer to an Internet host,showing how many hops the packetrequires to reach the host and howlong each hop takes
Traceroute
What is the customer default username for on the Comcast Business Gateway?
cusadmin
What is the technician default username on the Comcast Business Gateway?
mso
MSO
Multi system Operator
allows you to direct inbound Internet traffic to connect to a specific application or computer within a private LAN via a predefined port
Port Forwarding
Provides the ability to dynamically open a specific inboundport based on a request from a local computer or user.
Port Triggering
Allows you to open or close specificinbound ports to connected computers or firewalls configured with a publicroutable IP address (for use by static IP customers only).
True Static IP Port Management
Enables you to restrict specific local hosts fromaccessing particular Internet applications
Port Blocking
the IP address that the gateway uses toforward all traffic that is not addressed to a client within Comcast’s network.
Default Gateway
what is the address for the Comcast Business Gateway Login?
http://10.1.10.1
In regard to Comcast Business Voice, a serviceability check will consist of what two components?
- Serviceability of the location2. E911 serviceability
What is the Demarcation point for Business Class Voice?
the 66 Block and/or the telephone jack on the eMTA to which the Customer’s telephone network is connected
What is occurring when all theFront Panel LEDs are flashing?
Foreign voltage present on oneor more lines (or self-testwhen starting up)
How do you know if one of thetelephone lines if off the hook?
The LED of the telephone line isflashing
If Tel 7 is flashing slowly on an 8 line eMTA, about 1 flash per second, what does that indicate?
Line card Error
ATS
Advanced Technical Services
NGT
New Global Telecom (outsourced vendor)
TTS
Trouble Ticketing System
What is the MTTR for Business Class Voice customers?
4 hours
Customers can automatically distribute incoming calls to two or more extensions using which call feature?
Hunt Groups
Internet Phone services transmit phone calls over a
public network
5 Benefits of CT Champion Program to Comcast
- Faster learning curve for new, talented employees2. Reduced turnover3. Increased loyalty4. Increased employee productivity5. Creation of an innovative environment
Name 3 of the 5 traits of Visual Learners
- Learn through seeing2. Prefer to see the person speaking to them3. Think in pictures4. Like demonstrations and examples5. Take detailed notes
Name 3 of the 5 traits of Auditory Learners
- Learn by listening2. Prefer discussion groups3. Pay close attention to voice4. Like information to be read aloud5. Like to ask questions and paraphrase
Name 3 of the 5 Traits of Tactile Learners
- Learn by moving, doing and touching2. Prefer a hands-on approach3. Like to experiment4. Can become easily distracted5. Like to experience new things for themselves
5 steps to minimize anxiety
- Remember that the audience is your friend2. Memorize the most important parts of what you’ll say3. Practice positive self-talk4. Breath5.Check Your appearance
What are the four components of the human voice?
- Rate2. Volume3. Force4. Pitch
Good eye control serves what 2 purposes?
- It tells the listener something about you2. It allows you to learn something about the listener
The Six Key Techniques to Selling
- Build rapport2. Ask questions3. Listen4. Position the product5. Communicate the benefits6. Ask for the sale
It works by separating successive pictures into two types of video information- that which stays the same from picture to picture, and that which changes from picture to picture
Digital compression
A device or software that enables compression and or decompression for digital video
video codec
What is the major advantage of MPEG compared to other codecs?
The MPEG files are much smaller for the same quality
Video CDs are an example of what type of MPEG application?
MPEG-1
DVD, CATV, and HDTV are examples of what type of MPEG application?
MPEG-2
Internet streaming, video on cell phones and interactive tv are examples of what MPEG application?
MPEG-4
A MPEG video is a sequence of what three kinds of encoded pictures?
I pictures, P pictures, and B pictures
DTCP
Digital Transmission Content Protection
It defines a cryptographic protocol for protecting audio/video entertainment content from illegal copying, intercepting and tampering.
DTCP
ACP
Analog Copying and Piracy
This prevents or distorts copies made over an analog connection between a source player and a DVD recorder, DVR, PC or VCR
ACP (Analog Copying and Piracy)
This is the protection of content by requiring certain criteria to be met before granting access to this content.
CA or Conditional Access
What is the speed, range, and frequency of 802.11b ?
11 Mbps, 100-150 feet indoors, 2.4 GHz
What is the speed, range, and frequency of 802.11a?
54 Mbps, 25-75 feet indoors, 5 GHz
What is the speed, range, and frequency of 802.11g?
54 Mbps, 100-150 feet indoors, 2.4 GHz
What is the speed, range, and frequency of 802.11n?
100 Mbps and higher, Up to 160 feet, 2.4 GHz
This inspects the master boot record, program files, and macro code for the presence of viruses.
Antivirus software
This type of software installs programs in RAM that continue to operate in the background while other software applications are running. It monitors all the computer’s operations for any actions associated with viruses
Memory-resident antivirus software
This is a variant of spyware that displays advertising for products it thinks might interest you, based on the website you are browsing.
Adware
It can be defined as sending unsolicited bulk email.
spamming
What is the best way to prevent a hacker from accessing a customer’s system?
A hardware firewall
A term used to describe a range of malicious software example is external code that changes your browser’s settings.
Hijacking
This type of firewall rule compares key parts of each packet to a database of known safe data.
Stateful packet Inspection
This type of firewall rule examines each packet and if the origination address of the data is on a list of banned Internet locations, the firewall blocks it.
Packet Filtering
This type of firewall rule uses a server that examines all data based on the filtering rules and only forwards packets that obey the rules
Proxy
Before manually troubleshooting any IP problems, what should be done?
Run a network diagnostic check.
What type of port restricts connections speeds to about 6 Mbps?
USB
What operating system does not have a registry and does not require a backup?
Macintosh
What wireless adapter is credit-card sized wireless adapter that slides into the side of a laptop or desktop?
PC (PCMCIA) Card
What troubleshooting utility can you use in order to determine the computer’s IP address, and to reset the address if the computer cannot connect to the Internet?
IPConfig
Which Business Class Internet optional feature allows customers to operate VPN or Web and E-Mail servers without the fear of interruption?
Static IP Addresses
How does a technician initiate a telnet session?
In the command prompt, type in Telnettype open and the (cm ip address)Enter username: msoEnter password: (password of the day)
What command in telnet will allow a technician to packet sniff both upstream and downstream for 3 seconds in Comcast’s format?
sniff u+d 3 1
What does a technician type to display the existing NAT session log in a telnet session?
natShow
In a telnet session, what does a technician type to show the current dhcp lease info, including the IP, MAC and status of the private LAN?
dhcpShow
What calling feature allows different phone numbers to reach the same phone line with different ring patterns?
Distinctive Ring
A process that diverts a portion of the multiplexed aggregate signal at an intermediate point, and introduces a different signal for subsequent transmission in the same position.
Drop and Insert
A mathematical value derived from the number and severity of leaks in the cable system.
Cumulative Leakage Index (CLI)
How often is a CLI test performed?
Annually
What 2 ways can a CLI test be performed?
ground based or an aerial “flyover”
How long must leakage logs be kept on file?
At least 2 years
At what interval is CLI monitored?
Quarterly
FCC regulations requires a CLI figure of merit of what number?
64 or less
What is the most common cause of signal leakage?
poorly installed F-connectors in the drop
Carrier-to-beat rations greater than ______ are far enough below desired carrier level to be of little concern to the average viewer.
57 dB
This appears when ingress allows a locally broadcast TV channel’s signal to enter the TV along with the channel’s signal supplied by the network.
leading ghost
This is usually caused by a reflection on the cable system caused by poor directivity at the tap or device feeding the set.
following ghost
In cable systems it us usually caused when the same channel from two (or more) different TV stations is received by the same antenna.
Co-Channel Interference
Carrier-To-Noise Rule 1
If the input level (in dBmV) numerically equals an amplifier’s NF, the output C/N will always e 59.2 dB.
Carrier-To-Noise Rule 2`
For each dB the input level is raised above the amplifier’s NF, the output C/N improves by an equal amout above 59.2
Carrier-To-Noise Rule 3
C/N at the output of a single amplifier is always worse than that at the input by an amount equal to the amplifier’s NF.
These are an undesired change in the waveform of a signal.
Distortions
This is literally the “crossing” of modulation from one channel to another
Cross Modulation (XMOD)
For systems carrying forty or more channels, what distortion becomes visible before XMOD?
composite triple beats (CTB)
This appears as a horizontal bar moving from the bottom to the top of the picture
Hum Modulation
A primary source of hum modulation
power passing chokes used in passive devices
It is a source of hum modulation found in older systems.
using series regulated DC power supplies in the amplifier housings.
A phase modulation algorithm that is a digital modulation scheme wherein the carrier is shifted in 90-degree steps
Quadrature Phase Shift Keying (QPSK)
The four phases in which a carries is sent in QPSK are at what degrees?
45, 135, 225, 315
This is a digital modulation scheme that allows 2 channels of information to be transmitted at the same time on a particular frequency by changing the phase and amplitude.`
Quadrature Amplitude Modulation (QAM)
Digital QAM signals carry 2 signals that are referred to as what?
I and Q components
This is a measure of signal strength relative to background noise in analog and digital communications.q
Signal-to-noise ratio
NPR
Noise Power Ratio
What test uses a white noise generator to simulate the data filled spectrum and a band-pass filter to limit the spectrum?
Noise power ratio test
the ratio of the error power to the average power in an ideal QAM signal
Modulation Error Ratio (MER)
A method where additional data bits are added to the digital video bit stream to help identify and correct any errors that may be caused by the transmission system
Forward Error Correction (FEC)
This is displayed as a ratio of the number of errors to correct data bits and is given in scientific notation
Bit Error Rate (BER)
Defined as a condition where interfering signals leak into a cable network.
Ingress
What is the limit for ingress between 5 and 42 MHz?
-30 dBmV
This device passes high frequencies well, but attenuates (or reduces) frequencies lower than the cut-off frequency..
High Pass Filter
POP
Proof of Performance
These tests help to ensure that cable systems’ forward signals meet FCC standards as outlined in CFR 47, Part 76.605(a)(1-12) of the FCC regulations.
The Proof-of-Performance tests
Being able to carry and individually select different channels on a single cable by their unique frequency is called….
frequency division multiplexing (FDM)
Usually made of Aluminum, this device prevents ingress/egress and protects the electronics from the weather
Housing
Separates or combines the AC current’s two parts: the AC power and the RF broadband signals
Power Diplex
This device separates and recombines the forward and reverse signals fro the coaxial cable so they can be routed to the appropriate components within the amplifier station.
Diplex Filter
Compensates for the unequal attenuation properties of coaxial cable at different frequencies
equalizer
These are usually selected for their low noise figure
Forward Amplifier Module (Trunk)
Sometimes called a Mop-Up, this device is used to try and correct for any undesired peaks or valleys within the passband of the amplifier
Response Equalizer
AGC
Automatic Gain Control
ALS
Automatic Level and Slope Control
Similar to AGC, maintains the proper tilt (caused by temperature change in a specified amount of coaxial cable) and output level despite changes in the input signals.
Automatic Level and Slope Control (ALS)
Used to boost the return signals, its bandwidth ranges from 5 to 42 MHz.
Return Amplifier
Used at output of bridger module, it is a signal splitting device that plugs into a trunk/bridger chassis.
Feedermaker
Provides a means of monitoring the various inputs and outputs without interrupting service.
Test Points
This is used to divert a specific amount of signal from the feeder system and distribute it to 2, 4, or 8 output ports for connection of customer drops.
Tap
How many ports are represented on a circular tap symbol?
2
How many ports are represented on a square tap symbol?
4
How many ports are represented on a hexagonal tap symbol.
8
How is tap value determined?
The sum of the directional coupler tap loss plus the loss of the splitter(s)
What is the lowest tap value?
4
These are low value taps that feed the internal splitter(s) directly without the use of a directional coupler
Terminating tap
When low frequency signals are not attenuated as much as high frequency signals in coax cable, it can result in the level of lower frequency signals exceeding the level of the higher frequency signals. What is this called?
reverse tilt
What device is used to compensate for reverse tilt?
In-Line Equalizer
This device can eliminate the problem of a modem that is connected to a low value tap from overloading the upstream return amplifier.
In-Line Conditioner
This is the medium that is used to transmit our signals from the headend to the customer.
coaxial cable
Four components of coaxial cable
Jacket, Outer Conductor (Sheath), Dielectric, and Center Conductor
What are the three basic parts of a fiber link?
the fiber cable, the transmitter, and the receiver
PBX
Private Branch Exchange
4 Common types of Toll-fraud
- Unauthorized Voicemail access2. Unauthorized Call Forward and Transfer3. Direct Inward System Access (DISA)4. Social Engineering
DISA
Direct Inward System Access
This occurs when perpetrators access your voicemail illegally by determining your access password, and then place outbound calls from the system.
Unauthorized Voicemail Access
If a PBX voicemail system is breached, often Call Forward or Call Transfer can be invoked by a criminal to send inbound calls to an unauthorized destination. What is this process called?
Unauthorized Call Forward and Transfer
This telephone feature allows an outside caller to dial directly into the telephone system and to access all the system’s features and functions.
Direct Inward System Access (DISA)
It is the most common way perpetrators commit Toll-fraud
Direct Inward System Access (DISA)
Changing all of your phone system factory default passwords to prevent fraud should be don how often?
60-120 days is recommended
Asking Comcast or PBX maintenance provider to turn off international calling functionality if not needed will help prevent what?
International Toll-Fraud
Installing intrusion detection alarms for the PBX room and Providing remote access only to those that need are are two forms of what?
PBX lock-down activities (Fraud Prevention Techniques)
Doing a PBX audit with PBX vendor and having a phone system security audit performed by a third party are examples of what?
Fraud prevention Techniques
What site do business class customers go to to manage services online?
business.comcast.com/myaccount
Where can a comprehensive Help & Support Library be located?
business.comcast.com/elp
What is the money back guarantee for Business VoiceEdge or Business Trunks?
60-day money back guarantee
Where can customers go to learn about the Comcast Business Promise?
business.comcast.com/promise
At what point in the installation process can a customer register an account online?
As soon as installation is scheduled.
What are the benefits of a customer registering their account online before the installation is completed?
- set up billing preferences2. get installation text reminders3.access to the Upware marketplace
Why would a non-customer activate an account with Comcast Business Internet?
to access the Upware marketplace
What Business Internet services do not include wifi?
Internet-only Starter, Hospitality Internet or Ethernet services
DPC3939B
Model Number for the Business Wireless Gateway
Where can a customer go for more information on the Business Wireless Gateway?
mydeviceinfo.comcast.net and download the manufacturer’s User Guide
How does a customer reset the Business Wireless Gateway?
Use a thin object to press the Reset Button on the back panel. Hold for 2-5 seconds, and then release
This is an online marketplace of cloud-based small business applications that are specifically built for business
Upware Market
A curated collections of business grade cloud solutions with simple access and account managment
Upware
Where would a customer go to download Norton Internet Security?
Upware Market
With this you have an on-the-go communications platform including:Microsoft Outlook, Windows Sharepoint, and Mobile Access
Hosted Microsoft Exchange
What is in a Web Hosting Starter Package?
the ability to build a 3-page website at your own domain, and 10 MB of storage space and 100 MB of data transfer
What is the cost of the Web Hosting Starter Package?
Included at no extra charge
How much storage space comes with the Web Hosting Business Package?
300 GB of storage space
How much storage space comes the Web Hosting Commerce Package?
400 GB of storage space
How does the Professional Web Hosting Package compare to the Commerce Package?
Professional has all of the functionality included in the Commerce Package with even more storage space.
In the Upware Market, where can a customer click to learn more about it?
Under getting started, click on Upware 101
What is EXCLUDED in the 30 day money back guarantee for Business Class Voice, Internet or TV?
Installation charges, fees, taxes or per-call charges
What website would a business class customer go to, to Manage their business WiFi hotspot directory information?
business.comcast.com/myaccount
What is the model number of the Business Wireless Gateway?
DPC3939B
Rings each user in the order they appear on the User List
Hunt Group
For assistance with non-emergency concerns or questions, Comcast Business Voice provides what service? (where available)
311 service
Comcast Business Voice provided this for users of the Telecommunications Relay Service (TRS) center for the hearing impaired.
711 abbreviated dialing
TRS
Telecommunications Relay Service
What information does Enhanced 911 provide?
The telephone number and location
What phone number can customers call with 911 related questions?
800-391-3000
What number should a customer dial to get the latest traffic information?
511
An easy-to-remember number that connects you to community services like after-school programs, health services, food banks and other essential human services.
211
Planning Assistance “call before you dig” number
811
Directory Assistance number
411
What is the name of Comcast’s Paperless Billing?
Ecobill
What four social networks can a customer use to find information about Comcast Business class?
Linked-in, google plus, twitter, and facebook
