Linksys Router BEFW11P1 User Manual

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• Straight-Through Cabling•Cross-Over CablingCrimping Your Own Network Cables
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Twisted-Pair Cabling
There are different grades, or categories, of twisted-pair cabling. Category 5 is
the most reliable and is highly recommended. Category 3 is a good second
choice. Straight-through cables are used for connecting computers to a hub.
Crossover cables are used for connecting a hub to another hub (there is an
exception: some hubs have a built-in uplink port that is crossed internally,
which allows you to link or connect hubs together with a straight-through cable
instead). 
You can buy pre-made Category 5
cabling, or cut and crimp your own.
Category 5 cables can be purchased or
crimped as either straight-through or
crossover. Inside a Category 5 cable are
8 thin, color-coded wires inside that run
from one end of the cable to the other.
All 8 wires are used. In a straight-
through cable, wires 1, 2, 3, and 6 at one
end of the cable are also wires 1, 2, 3,
and 6 at the other end. In a crossover
cable, the order of the wires change from
one end to the other: wire 1 becomes 3,
and 2 becomes 6. See the diagrams on
the next page for more detailed informa-
tion on straight-through
and crossover cabling.
To determine which wire is wire number 1, hold the cable so that the end of the
plastic RJ-45 tip (the part that goes into a wall jack f irst) is facing away from
you. Face the clip down so that the copper side faces up (the springy clip will
now be parallel to the floor).When looking down on the copper side, wire 1 will
be on the far left. 
						

							DNS- The domain name system (DNS) is the way that Internet domain name
are located and translated into Internet Protocol (IP) addresses. A domain name
is a meaningful and easy-to-remember handle for an Internet address. 
DSSS- Also known as “Direct Sequence Spred Spectrum”, this is a variety of
radio transmission methods that continuously change frequencies or signal pat-
terns. Direct sequence spread spectrum (DSSS), which is used in CDMA, mul-
tiplies the data bits by a very fast pseudo-random bit pattern (PN sequence) that
spreads the data into a large coded stream that takes the full bandwidth of the
channel 
Dynamic IP Address- An IP address that is automatically assigned to a client
station in a TCP/IP network, typically by a DHCP server. Network devices that
serve multiple users, such as servers and printers, are usually assigned static IP
addresses. 
ESS- More than one BSS in a network.
FHSS- Also known as “Frequency Hopping Spread Spectrum”. Frequency
hopping spread spectrum (FHSS) continuously changes the center frequency of
a conventional carrier several times per second according to a pseudo-random
set of channels, while chirp spread spectrum changes the carrier frequency.
Because a f ixed frequency is not used, illegal monitoring of spread spectrum
signals is extremely diff icult, if not downright impossible depending on the
particular method. 
Firewall- A f irewall is a set of related programs, located at a network gateway
server, that protects the resources of a network from users from other networks.
(The term also implies the security policy that is used with the programs.) An
enterprise with an intranet that allows its workers access to the wider Internet
installs a f irewall to prevent outsiders from accessing its own private data
resources and for controlling what outside resources to which its own users
have access. 
Basically, a f irewall, working closely with a router program, examines each
network packet to determine whether to forward it toward its destination.
Firmware- Programming that is inserted into programmable read-only mem-
ory (programmable read-only memory), thus becoming a permanent part of a
computing device. 
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GlossaryAd-hoc Network - An ad-hoc network is a wireless network or other small net-
work in which some of the network devices are part of the network only for the
duration of a communications session while in some close proximity to the rest
of the network.
BSS(Basic Service Set) - A group of Instant Wireless
TM
Network PC Card
users and a Wireless AP + Cable/DSL Router.
Default Gateway- The router used to forward all traff ic that is not addressed
to a station within the local subnet.
DHCP(Dynamic Host Conf iguration Protocol) - Aprotocol that lets network
administrators manage centrally and automate the assignment of Internet
Protocol (IP) addresses in an organizations network. Using the Internets set of
protocol (TCP/IP), each machine that can connect to the Internet needs a
unique IP address. When an organization sets up its computer users with a con-
nection to the Internet, an IP address must be assigned to each machine.
Without DHCP, the IP address must be entered manually at each computer and,
if computers move to another location in another part of the network, a new IP
address must be entered. DHCP lets a network administrator supervise and dis-
tribute IP addresses from a central point and automatically sends a new IP
address when a computer is plugged into a different place in the network. 
DHCP uses the concept of a lease or amount of time that a given IP address
will be valid for a computer. The lease time can vary depending on how long a
user is likely to require the Internet connection at a particular location. Its espe-
cially useful in education and other environments where users change fre-
quently. Using very short leases, DHCP can dynamically reconf igure networks
in which there are more computers than there are available IP addresses. 
DHCP supports static addresses for computers containing Web servers that
need a permanent IP address. 
DMZ- A DMZ (demilitarized zone) is a computer host or small network
inserted as a neutral zone between a companys private network and the out-
side public network. It prevents outside users from getting direct access to a
server that has company data. 
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							LAN- A local area network (LAN) is a group of computers and associated
devices that share a common communications line and typically share the
resources of a single processor or server within a small geographic area (for
example, within an off ice building). 
MAC Address- The MAC (Media Access Control) address is your computers
unique hardware number. 
mIRC - mIRC runs under Windows and provides a graphical interface for log-
ging onto IRC servers and listing, joining and leaving channels.
NAT- NAT (Network Address Translation) is the translation of an Internet
Protocol address (IP address) used within one network to a different IP address
known within another network. One network is designated the inside network
and the other is the outside. 
Network Mask- also known as the “Subnet Mask”.
Packet Filtering- Discarding unwanted network traff ic based on its originat-
ing address or range of addresses or its type (e-mail, f ile transfer, etc.). 
PCMCIA- The PCMCIA (Personal Computer Memory Card International
Association) is an industry group organized in 1989 to promote standards for a
credit card-size memory or I/O device that would f it into a personal computer,
usually a notebook or laptop computer. 
Ping- (Packet INternet Groper) An Internet utility used to determine whether
a particular IP address is online. It is used to test and debug a network by send-
ing out a packet and waiting for a response.
PPPoE(Point to Point Protocol over Ethernet) - A method used mostly by DSL
providers for connecting personal computers to a broadband modem for
Internet access.  It is similar to how a dial-up connection works but at higher
speeds and quicker access. 
PPTP(Point-to-Point Tunneling Protocol) - A protocol (set of communication
rules) that allows corporations to extend their own corporate network through
private tunnels over the public Internet. Effectively, a corporation uses a
wide-area network as a single large local area network. A company no longer
needs to lease its own lines for wide-area communication but can securely use
the public networks. This kind of interconnection is known as a virtual private
network.
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IEEE- The Institute of Electrical and Electronics Engineers. The IEEE
describes itself as the worlds largest technical professional society -- promot-
ing the development and application of electrotechnology and allied sciences
for the benef it of humanity, the advancement of the profession, and the well-
being of our members. 
The IEEE fosters the development of standards that often become national and
international standards. The organization publishes a number of journals, has
many local chapters, and several large societies in special areas, such as the
IEEE Computer Society. 
Infrastructure- An infrastructure network is a wireless network or other small
network in which the wireless network devices are made a part of the network
through the Access Point which connects them to the rest of the network.
IP Address- In the most widely installed level of the Internet Protocol
(Internet Protocol) today, an IP address is a 32-binary digit number that identi-
f ies each sender or receiver of information that is sent in packet across the
Internet. When you request an HTML page or send e-mail, the Internet
Protocol part of TCP/IP includes your IP address in the message (actually, in
each of the packets if more than one is required) and sends it to the IP address
that is obtained by looking up the domain name in the Uniform Resource
Locator you requested or in the e-mail address youre sending a note to. At the
other end, the recipient can see the IP address of the Web page requestor or the
e-mail sender and can respond by sending another message using the IP address
it received. 
IPCONIFG- A utility that provides for querying, def ining and managing IP
addresses within a network.  A commonly used utility, under Windows NT and
2000, for conf iguring networks with static IP addresses.
IPSec- IPSec (Internet Protocol Security) is a developing standard for securi-
ty at the network or packet processing layer of network communication. A big
advantage of IPSec is that security arrangements can be handled without
requiring changes to individual user computers. 
ISP- An ISP (Internet service provider) is a company that provides individuals
and companies access to the Internet and other related services such as Web site
building and virtual hosting. 
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							Network applications that want to save processing time because they have very
small data units to exchange (and therefore very little message reassembling to
do) may prefer UDP to TCP. 
UTP- Unshielded twisted pair is the most common kind of copper telephone
wiring. Twisted pair is the ordinary copper wire that connects home and many
business computers to the telephone company. To reduce crosstalk or electro-
magnetic induction between pairs of wires, two insulated copper wires are
twisted around each other. Each signal on twisted pair requires both wires.
Since some telephone sets or desktop locations require multiple connections,
twisted pair is sometimes installed in two or more pairs, all within a single
cable. 
Virtual Server- Multiple servers that appear as one server, or one system
image, to the operating system or for network administration
WA N- A communications network that covers a wide geographic area, such as
state or country.
WEP(Wired Equivalent Privacy) - A data privacy mechanism based on a 64-
bit shared key algorithm, as described in the IEEE 802.11 standard. 
WINIPCFG- Conf iguration utility based on the Win32 API for querying,
def ining and managing IP addresses within a network.  A commonly used util-
ity, under Windows 95, 98, and Millennium, for conf iguring networks with
static IP addresses.
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PrintServer- A hardware device that enables a printer to be located anywhere
in the network. 
RJ-45- A connector similar to a telephone connector that holds up to eight
wires, used for connecting Ethernet devices.
Roaming- The ability to use a wireless device and be able to move from one
access point’s range to another without losing the connection.
Static IP Address- A permanent IP address that is assigned to a node in a
TCP/IP network. 
Subnet Mask- The method used for splitting IP networks into a series of sub-
groups, or subnets. The mask is a binary pattern that is matched up with the IP
address to turn part of the host ID address f ield into a f ield for subnets. 
TCP(Transmission Control Protocol) - A method (protocol) used along with
the Internet Protocol (Internet Protocol) to send data in the form of message
units between computers over the Internet. While IP takes care of handling the
actual delivery of the data, TCP takes care of keeping track of the individual
units of data (called packet) that a message is divided into for eff icient routing
through the Internet. 
TCP/IP- Transmission Control Protocol/Internet Protocol (TCP/IP) is the
basic communication language or protocol of the Internet. It can also be used
as a communications protocol in a private network (either an intranet or an
extranet). When you are set up with direct access to the Internet, your comput-
er is provided with a copy of the TCP/IP program just as every other computer
that you may send messages to or get information from also has a copy of
TCP/IP. 
UDP(User Datagram Protocol) - A communications method (protocol) that
offers a limited amount of service when messages are exchanged between com-
puters in a network that uses the Internet Protocol (IP). UDP is an alternative
to the Transmission Control Protocol (TCP) and, together with IP, is sometimes
referred to as UDP/IP. Like the Transmission Control Protocol, UDP uses the
Internet Protocol to actually get a data unit (called a datagram) from one com-
puter to another. Unlike TCP, however, UDP does not provide the service of
dividing a message into packets (datagrams) and reassembling it at the other
end. Specif ically, UDP doesnt provide sequencing of the packets that the data
arrives in. This means that the application program that uses UDP must be able
to make sure that the entire message has arrived and is in the right order.
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®Wireless AP + Cable/DSL Router with PrintServer
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Etherfast
®Wireless AP + Cable/DSL Router with PrintServer
Dimensions:7.44” x 6.16” X 2.64” (186mm x 154mm x 48mm)
Unit Weight:17.5 oz. (0.5 Kg)
Power:External, 5V DC, 3A
Certifications:FCC Class B Part 15, CE Mark Commercial
Operating Temp:0ºC to 40ºC (32ºF to 104ºF) 
Storage Temp:-20ºC to 70ºC (-4ºF to 158ºF)
Operating Humidity:10% to 85%, Non-Condensing
Storage Humidity:5% to 90%, Non-CondensingEnvironmental
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SpecificationsStandards:IEEE 802.3 (10BaseT), IEEE 802.3u 
(100BaseTX), IEEE 802.11b (Wireless), IEEE1284
Protocol:CSMA/CD
Ports:WAN: One 10Base-T RJ-45 Port for
Cable/DSL Modem 
LAN: One Shared Uplink Port 
Wireless: PCMCIA slot
Printer: One DMA-Equipped, Bi-Directional
Parallel Port
Cabling Type:10BaseT: UTP Category 3 or better       
100BaseTX: UTP Category 5 or better
Printer: Standard Printer Cable
Speed (Mbps):WAN: Up to 10
LAN:10/100 (Half or Full Duplex)
Wireless: Up to 11
Operating Range Indoor: up to 60M (205ft.) @ up to 11 Mbps
(Wireless):up to 80M (275 ft.) @ up to 5.5 Mbps
up to 130M (425ft.) @ up to 2 Mbps 
up to 150M (492 ft.) @ up to 1 Mpbs
Outdoor: up to 250M (820 ft.) up to @ 11 Mbps
up to 350M (1148 ft.) up to @ 5.5 Mbps
up to 400M (1312 ft.) up to @ 2 Mbps
up to 500M (1640 ft.) up to @ 1 Mbps
LEDs:Power, Diag, WAN, WLAN
LAN: 10, 100
Printer: Err, Act 
						

							Contact InformationFor help with the installation or operation of this product, contact Linksys
Customer Support at one of the phone numbers or Internet addresses below.
Information800-546-5797 (LINKSYS)
Tech Support800-326-7114
RMA Issues949-261-1288
Fa x949-261-8868
[email protected]
We bhttp://www.linksys.com
FTP Siteftp.linksys.com
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Warranty InformationBE SURE TO HAVE YOUR PROOF OF PURCHASE AND A BARCODE
FROM THE PRODUCTS PACKAGING ON HAND WHEN CALLING.
RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF
PURCHASE. 
IN NO EVENT SHALL LINKSYS’ LIABILITY EXCEED THE PRICE PAID
FOR THE PRODUCT FROM DIRECT, INDIRECT, SPECIAL, INCIDEN-
TAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE
OF THE PRODUCT, ITS ACCOMPANYING SOFTWARE, OR ITS DOCU-
MENTATION. LINKSYS DOES NOT OFFER REFUNDS FOR ANY PROD-
UCT. 
LINKSYS OFFERS CROSS SHIPMENTS, A FASTER PROCESS FOR PRO-
CESSING AND RECEIVING YOUR REPLACEMENT.  LINKSYS PAYS
FOR UPS GROUND ONLY. ALL CUSTOMERS LOCATED OUTSIDE OF
THE UNITED STATES OF AMERICA AND CANADA SHALL BE HELD
RESPONSIBLE FOR SHIPPING AND HANDLING CHARGES. PLEASE
CALL LINKSYS FOR MORE DETAILS.
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							© Copyright 2001 Linksys, All Rights Reserved.
http://www.linksys.com