Prestige 964 Cable Router

Safety Instructions

C

Appendix B

Important Safety Instructions

The following safety instructions apply to the Prestige:

Be sure to read and follow all warning notices and instructions.

The maximum recommended ambient temperature for the Prestige is 40º(104º). Care must be taken to allow

sufficient air circulation or space between units when the Prestige is installed inside a closed rack assembly.

The operating ambient temperature of the rack environment might be greater than room temperature.

Installation in a rack without sufficient airflow can be unsafe.

Racks should safely support the combined weight of all equipment.

The connections and equipment that supply power to the Prestige should be capable of operating safely with

the maximum power requirements of the Prestige. In case of a power overload, the supply circuits and supply

wiring should not become hazardous. The input rating of the Prestige is printed on the nameplate.

The AC adapter must plug in to the right supply voltage, i.e. 120VAC adapter for North America and 230VAC

adapter for Europe. Make sure that the supplied AC voltage is correct and stable. If the input AC voltage is

over 10% lower than the standard may cause the Prestige to malfunction.

Installation in restricted access areas must comply with Articles 110-16, 110-17, and 110-18 of the National

Electrical Code, ANSI/NFPA 70.

Do not allow anything to rest on the power cord of the AC adapter, and do not locate the product where

anyone can walk on the power cord.

Do not service the product by yourself. Opening or removing covers can expose you to dangerous high voltage

points or other risks. Refer all servicing to qualified service personnel.

Generally, when installed after the final configuration, the product must comply with the applicable safety

standards and regulatory requirements of the country in which it is installed. If necessary, consult the

appropriate regulatory agencies and inspection authorities to ensure compliance.

1.

A rare condition can create a voltage potential between the earth grounds of two or more buildings. If

products installed in separate building are interconnected, the voltage potential can cause a hazardous

condition. Consult a qualified electrical consultant to determine whether or not this phenomenon exists and,

if necessary, implement corrective action before interconnecting the products. If the equipment is to be used

with telecommunications circuit, take the following precautions:

Never install wiring during a lightning storm.

Never install jacks in wet location unless the jack is specially designed for wet location.

Never touch uninsulated wires or terminals unless the line has been disconnected at the network interface.

Use caution when installing or modifying lines during an electrical storm. There is a remote risk of electric

shock from lightning.

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Prestige 964 Cable Router

Glossary

E

Glossary of Terms

10BaseT

The 10-Mbps baseband Ethernet specification that uses two pairs of twisted-pair cabling

(Category 3 or 5): one pair for transmitting data and the other for receiving data.

ARP

Address Resolution Protocol is a protocol for mapping an Internet Protocol address (IP address) to

a physical machine address that is recognized in the local network.

Authenticity

Proof that the information came from the person or location that reportedly sent it. One example

of authenticating software is through digital signatures.

Back Door

A deliberately planned security breach in a program. Back doors allow special access to a

computer or program. Sometimes back doors can be exploited and allow a cracker unauthorized

access to data.

Backbone

A high-speed line or series of connections that forms a major pathway within a network.

BackOrifice

BackOrifice is a remote administration tool which allows a user to control a

computer across a TCP/IP connection using a simple console or GUI application. BackOrifice is

a potentially disastrous Trojan horse since it can provide the user unlimited access to a system.

Bandwidth

This is the capacity on a link usually measured in bits-per-second (bps).

Bit

(Binary Digit) -- A single digit number in base-2, in other words, either a 1 or a zero. The

smallest unit of computerized data.

Brute Force Hacking

A technique used to find passwords or encryption keys. Force Hacking involves trying every

possible combination of letters, numbers, etc. until the code is broken.

Byte

A set of bits that represent a single character. There are 8 bits in a Byte.

Cable Modem (CM)

A cable modem is a device that enables you to hook up your computer to a local cable TV line

and receive data at about 1.5 Mbps. This data rate far exceeds that of the prevalent 28.8 and 56

Kbps telephone modems, and up to 128 Kbps of ISDN that is about the data rate available to

subscribers of Digital Subscriber Line (DSL) telephone service. A cable modem can be added to

or integrated with a set top box that turns your TV set into an Internet channel. For computer

attachment, the cable line must be split so that part of the line goes to the TV set and the other

part goes to the cable modem and the computer.

A cable modem is more like a network interface card (NIC) than a computer modem. All of the

cable modems attached to a cable TV company coaxial cable line communicate with a Cable

Modem Termination System (CMTS) at the local cable TV company office. All cable modems

can receive only from and send signals to the CMTS, but not to other cable modems on the line.

Camping Out

Staying in a "safe" place once a hacker has broken into a system. The term

can be used with a physical location, electronic reference, or an entry point for future attacks.

CATV

Cable TV system. Can be all coaxial- or HFC- (Hybrid Fiber Coax) based.

CDR

Call Detail Record. This is a name used by telephone companies for call related information.

Channel

A specific frequency and bandwidth combination. In the present context, it means TV channels

for television services and downstream data for cable modems.

CHAP

Challenge Handshake Authentication Protocol is an alternative protocol that avoids sending

passwords over the wire by using a challenge/response technique.

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F

Glossary

Cipher Text

Text that has been scrambled or encrypted so that it cannot be read without deciphering it. See

Encryption

Client

A software program that is used to contact and obtain data from a Server software program on

another computer. Each Client program is designed to work with one or more specific kinds of

Server programs, and each Server requires a specific kind of Client. A Web Browser is a specific

kind of Client.

CMTS

Cable Modem Termination System. A central device for connecting the cable TV network to a

data network like the Internet. Normally it is placed in the headend of the cable TV system.

Cookie

A string of characters saved by a web browser on the user's hard disk. Many web pages send

cookies to track specific user information. Cookies can be used to retain information as the user

browses a web site. For example, cookies are used to 'remember' the items a shopper may have in

a shopping cart.

Countermeasures

Techniques, programs, or other tools that can protect your computer against threats.

CPE

Customer Premises Equipment. Used to describe the computer and/or other equipment that the

customer may want to connect to the cable modem.

Cracker

Another term for hackers. Generally, the term cracker refers specifically to a person who

maliciously attempts to break encryption, software locks, or network security.

Cracker Tools

Programs used to break into computers. Cracker tools are widely

distributed on the Internet. They include password crackers, Trojans, viruses, war-dialers, and

worms.

Cracking

The act of breaking into computers or cracking encryptions.

Crossover Ethernet

cable

A cable that wires a pin to its opposite pin, for example, RX+ is wired to TX+. This cable

connects two similar devices, for example, two data terminal equipment (DTE) or data

communications equipment (DCE) devices.

Cryptoanalysis

The act of analyzing (or breaking into) secure documents or systems that are protected with

encryption.

CSU/DSU

Channel Service Unit/Data Service Unit. CSUs (channel service units) and DSUs (data service

units) are actually two separate devices, but they are used in conjunction and often combined into

the same box. The devices are part of the hardware you need to connect computer equipment to

digital transmission lines. The Channel Service Unit device connects with the digital

communication line and provides a termination for the digital signal. The Data Service Unit

device, sometimes called a digital service unit, is the hardware component you need to transmit

digital data over the hardware channel. The device converts signals from bridges, routers, and

multiplexors into the bipolar digital signals used by the digital lines. Multiplexors mix voice

signals and data on the same line.

DCE

Data Communications Equipment is typically a modem or other type of communication device.

The DCE sits between the DTE (data terminal equipment) and a transmission circuit such as a

phone line.

Decryption

The act of restoring an encrypted file to its original state.

Denial of Service

Act of preventing customers, users, clients or other machines from

accessing data on a computer. This is usually accomplished by interrupting or overwhelming the

computer with bad or excessive information requests.

DHCP

Dynamic Host Configuration Protocol automatically assigns IP addresses to clients when they

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Glossary

G

log on. DHCP centralizes IP address management on central computers that run the DHCP server

program. DHCP leases addresses for a period of time which means that addresses are made

available to assign to other systems.

Digital Signature

Digital code that authenticates whomever signed the document or software. Software, messages,

Email, and other electronic documents can be signed electronically so that they cannot be altered

by anyone else. If someone alters a signed document, the signature is no longer valid. Digital

signatures are created when someone generates a hash from a message, then encrypts and sends

both the hash and the message to the intended recipient. The recipient decrypts the hash and

original message, makes a new hash on the message itself, and compares the new hash with the

old one. If the hashes are the same, the recipient knows that the message has not been changed.

Also see Public-key encryption.

DNS

Domain Name System. A database of domain names and their IP addresses. DNS is the primary

naming system for many distributed networks, including the Internet.

DOCSIS

Data over Cable Service Interface Specification. It is the dominating cable modem standard,

which defines technical specifications for both cable modem and CMTS.

Domain Name

The unique name that identifies an Internet site. Domain Names always have 2 or more parts,

separated by dots. The part on the left is the most specific, and the part on the right is the most

general.

Downstream

The data flowing from the CMTS to the cable modem.

Downstream

Frequency

The frequency used for transmitting data from the CMTS to the cable modem. Normally in the

42/65-850 MHz range depending on the actual cable plant capabilities.

DRAM

Dynamic RAM that stores information in capacitors that must be refreshed periodically.

DTE

Originally, the DTE (data terminal equipment) meant a dumb terminal or printer, but today it is a

computer, or a bridge or router that interconnects local area networks.

EMI

ElectroMagnetic Interference. The interference by electromagnetic signals that can cause reduced

data integrity and increased error rates on transmission channels.

Encryption

The act of substituting numbers and characters in a file so that the file is unreadable until it is

decrypted. Encryption is usually done using a mathematical formula that determines how the file

is decrypted.

Ethernet

A very common method of networking computers in a LAN. There are a number of adaptations

to the IEEE 802.3 Ethernet standard, including adaptations with data rates of 10 Mbits/sec and

100 Mbits/sec over coaxial cable, twisted-pair cable, and fiber-optic cable. The latest version of

Ethernet, Gigabit Ethernet, has a data rate of 1 Gbit/sec.

Events

These are network activities. Some activities are direct attacks on your system, while others

might be depending on the circumstances. Therefore, any activity, regardless of severity is called

an event. An event may or may not be a direct attack on your system.

FAQ

(Frequently Asked Questions) -- FAQs are documents that list and answer the most common

questions on a particular subject.

FCC

The FCC (Federal Communications Commission) is in charge of allocating the electromagnetic

spectrum and thus the bandwidth of various communication systems.

Firewall

A hardware or software "wall" that restricts access in and out of a network. Firewalls are most

often used to separate an internal LAN or WAN from the Internet.

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