*63 Activate

*83 Deactivate

*72 activate

*73 Deactivate

*52

(4/8 line EMTA only)

*77 Activate

*87 Deactivate

*60 Activate

*80 + prompt 3 Deactivate

2 + last 3 digits of phone number

(4/8 line EMTA only)

Set by Provisioning

(4/8 line EMTA only)

*230 Activate

*231 Deactivate

(4/8 line EMTA only)

On the job training

Student (not champ) responsible for completing work

Compression/Decompression

Moving picture expert group

Name of a family of standards used for coding video and audio information in a digital compressed format

Intra-coded picture

Single compressed picture that contains all the spatial information of a video picture

Encoded as single freestanding image (no B-pic or P-pic reference)

Predictive

Cumputed based on nearest previous I- or P-pic

More compressed than I- pictures and provide a reference for the calculation of B- pictures

B-Pictures

Bi-Directional pictures

Use both past and subsequent pictures as references to calculate the compressed picture data

Digital Transmission Content Protection

Standards Specification to provide protected digital entertainment in the home

DTCP defines a cryptographic protocol for protecting digital media from illegal copying, intercepting and tampering

*developed by Intel and 4 other companies

Analog Copying & Piracy

Prevents or distorts copies made over an analog connection

ACP triggers an integraated circuit in the playback device; adding the ACP signal to the outgoing video

Conditional Access

The protection of content by requiting certain criteria to be met before granting access to this content

The standard for CA is provided with CableCARDs

Home Theater in a Box

Cust responsible for install and configuration of HTIB

CRT

Least expensive

highest quality picture

size limitation

CRT, DLP, LCD, LCos

larger screen size

lower profile

affordable

CRT, DLP, LCFD, LCos

Largest size

Needs hightly reflective screen

LCD, Plasma

Larger screen size

lowest profile

Inserts copies of itself into other program files

Replicates itself

Checks for conditions (usally a specific date)

When conditions exist, virus delivers its destructive payload

Replicates itself

Disguise themselves to avoid antivirus detection

Consists of nonfunctioning changing sections of fake code

Replicates itself (each creating different fake code to break its identifying signature

May falsify information in header so program file appears to be the correct size

When triggering condition is met, virus unleashes payload

May be harmless or destructive

Software that piggybacks on real programs

When program runs, the virus runs too

Contained in an E-mail or its attachments or both

usually replicates itself by mailing itself to dozens of people in victims e-mail address book

Software: uses computer networks and security holes to replicate itself

A copy of the worm scans the network for another machine that has a specific security hole.

Small program

Claims to be something its not (like a game), but when run it does damge (sending e-mail, erasing files).

A program that sends information about you and how you use your PC to maketes and advertisers, usually without you being aware.

*may: record keystrokes, snoop documents, track web usage, scour your files for credit card #'s)

Spammers Target

E-mail

Instant messaging

Newsgroups

Search engines

Blogs

Mobile Phones

Packet Filtering

Proxy

Stateful inspection

*Used to filter out unwanted intrusions from the internet.  The wall shuts any nonessential ports a hacker might probe for openings.

Minimum Point of Entry

*Commercial demaraction point for BCDV

Telemetry Cable

*color sequence

White

Brown

Blue

Orange

Green

Network Terminology -

Network

Local Area Network

Geographically close set of computers on a single network; using the same connection device

Wide Area Network

Geographically Far apart

*The internet is an example

Network Terminology -

Firewall

With defined access control policy, a firewall permits and blocks traffic. 

Hardware or software

Hardware allows traffic to be processed without utilizing the resources on the computer.

Virtual Private Network

Uses a public network (like the internet) to establish a secure connection with an orginizations private network

Network Address Translation

Technique by which several hosts or computers share a single ip address for access to the internet.

Uses one set of IP's for internal traffic and a second set for external traffic

Provides a type of firewall by hiding internal IP addresses

Port Address Translation

Forwards requests for a particular IP port pair to another IP port pair.

Network Terminology -

Subnetworks

Subnetting is the concept of partitioning large networks into smaller segments.

Usally resides within a common geographical location

*allows computers of a subnet to communicate directly, rather than through several complex networks

Consider the IP address 150.215.017.009 -

The first set (150.215) represents?

The second set (017.009) represents?

First set defines NETWORK

Second set defines HOST (device)

IP addresses contained within a subnetwork

(lowest in value to highest)

Network IP - lowest, encompasses the entire subnetwork

Rotable IP (static) - used on cutomers equiptment

Gateway IP - used on the IP gateway

Broadcast IP - highest, identifies all hosts/devices on the LAN

Network Terminology -

Subnet Mask

Caused when a TV signal (of the same frequency and video content) arrives at a receiver just before, or just after, the desired TV signal

*if its level is more than 30 dB below the desired carrier, you will not see it

Caused in one channel by the carrier from another transmitter operating on the same channel 

*It has the same definition as for a beat

Caused by random electron activity of the atoms that make up the conductor, resistor, or any part of the passive circuit in question.

*at any temperature above absolute zero!

Carrier to Noise

(C/N) ratio

The difference in a peak carrier level, to the noise level

*levels both are measured in dBmV

*-59.2dBmV (Noise floor)

**think analog MER**

Cross modulation

(XMOD)

Crossing of modulation from one channel to another

*Vertical Bars

*XMOD 48 dB below visual carrier for non-visibility

*If on screen carrier to cross modulation should be at least 51 dB

Composite Triple Beat

Minimum C/CTB ratio with CW carriers would be 51 dB with 53 dB as the goal

Horizontal bar

60-cycle and 120-cycle modulation of the TV carriers

carrier-to-hum ratio of 30 dB or better is considered acceptable

Quadrature Phase Shift Keying

Modulation algorithm, wherein the carrier is shifted in 90-degree steps. 

A single carrier is split into two carriers with one 90 - degrees out of phase with the other.

*4 possible phase states and the magnitude is constant

*can encode two bits per symbol (twice the rate of BPSK

Quadrature Amplitude Modulation

Allows 2 channels of information to be transmitted at the same time on a particular frequency by changing the phase and amplitude.

Noise Power Ratio

Measures activity levels in the unused portion of a multi-channel system when there is random activity in the active channels.

*Noise and intermodulation distortion products falling into the unused channel can cause poor performance.

Modulation Error Ratio

Measures the ratio of the error power to the average power in an ideal QAM signal

**Think digital Carrier-to-noise**

Forward Error Correction

A method where addional data bits are added to the digial video bit stream to help identify and correct any errors that may be caused by the transmission system.

Bit Error Rate

Measures how often an error occurs in a given amount of data.

*displayed as a ratio of # of errors to # of correct data bits

Directed Call Pickup

Directed Call Pickup with Barge-in

*97 followed by an extension to pick up a ringing call

*33 followed by an extension to pick up or barge-in on a call

Direct to Voice mail

Directo to Voice mail with active call

*55

*22 for flash hold or flash hook and enter *55 and the extension

*22 for flash hold (or hit the flash hook) and enter *68

Proof of Performance

FCC standards as outlined in CFR 47, Part 76.605(a)(1-12) of the FCC regulations.

*Tests to verify the quality of downstream signals at the coustomer end of the network

**put into effect in early 1990's

Problems in the return path adding together

(they become stronger as more interferences are added to the return path signals)

Frequency Division Multiplexing

Being able to carry and individually select different channels on a single cable by their unique frequency

Point of Sale

**baud rate 9600+

Local Power Supplie Unit

Provides batter back-up

Converged Regional Area Network

Provides a single common infrastructure in which all services are delivered via IP over a consistent transport and routing architecture

Demiliterized Zone

Separates or combines the AC current's two parts:

AC power and RF signal

Used to try and correct for any undesired peaks or valleys within the passband of the amplifier

*A.K.A. Mop-Up

Automatic Gain Contol

Used to compenste for fluctuations of the inut signal

Automatic Level and Slope Control

Maintains the proper tilt and output level despite changes in the input signal

Test Points

Contains diplex fitlers but allows attenuator pads to be installed in the return portion of the spctrum.

*installed where low value taps are used

Fiber cable

Transmitter

Receiver (Optical Node Receiver)

Coating

Cladding

Core

*made of silica glass

The Comcast Private Backbone

*carries Comcast traffic from CRAN to CRAN

Internet Backbone

Used to provide regions with access to national HSD peers and to global Internet access via one or more transit providers.