HP Jetdirect 280m 802.11b Wireless Print Server User Manual
HP Jetdirect 280m user's guide
User's Guide
HP Jetdirect 280m 802.11b internal wireless print server
Contents:
1.
Basics of networking and network printing
2.
General information about the print server
3.
Installation of the print server.
4. Configuration and management -- please refer to the
HP Jetdirect
Administrator's Guide. In that document, click on one of these topics in the
contents panel on the left:
❍ TCP/IP Configuration
❍ Using the Embedded Web Server
❍ Configuring for LPD printing
❍ FTP printing
❍ Security features
5. Troubleshooting the print server
6.
Technical support for the print server
7.
Specifications and regulatory information for the print server
8.
Limited warranty for the print server
9.
Some useful tools and techniques
❍ Tools
■ Installation software for the print server
■ Embedded web server
❍ Techniques
■ Interpreting the Status light
■ Printing a configuration page
■ Setting a new IP address
■ Performing a cold reset (reset to factory defaults)
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HP Jetdirect 280m user's guide
©2001, 2002 Hewlett-Packard Company
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Network Basics
Networking Basics
Please click on a title to view a document.
The Network Basics Tutorial
A brief overview of:
● Networks
● Network Printing
● Installing a Network Printer
Tips on Getting Started
Answers to common questions:
● Which CD should I use?
● Where do I find the printer driver?
● When do I stop?
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Network Basics
The
Network Basics
Tutorial
This tutorial tells you about:
● Networks
● Network Printing
● Installing a Network Printer
Click the button to continue.
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Network Basics
Section 1:
Networks
Click the button to continue.
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Network Basics
NETWORKS
What you want
. . .
. . . is for all your
computers to be able to:
● Communicate --
send and receive email, and
participate in
conferences
● Share
information -transfer files among
systems, and get
information from
central databases
● Share resources --
use shared printers,
scanners, and
servers
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NETWORKS
The problem is
. . .
. . . standalone computers
have no way to talk to
each other, so attempts at
communication fail.
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Network Basics
NETWORKS
The solution: a
local area
network
A local area network (or
LAN) provides
connections that tie the
computers together and
allow them to
communicate. (The most
common type of local
area network may also be
referred to as an Ethernet
LAN or an Ethernet.)
Local area networks can
be either wired (as shown
here) or wireless. We will
look at the different types
in the next few pages.
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Network Basics
NETWORKS
Wired LANs
As the name implies, a
wired LAN connects
computers (and other
network devices)
physically, using wires. A
typical LAN uses twistedpair wiring (similar to
telephone wiring) to
connect each computer to
a central hub. The hub
transmits network
communications between
computers.
Wired LANs offer highspeed communication, as
well as reasonable
security and reliability. In
general, however, they are
not as flexible as wireless
LANs.
Most wired LANs
conform to the IEEE
802.3 standard. The most
common wiring schemes
use twisted-pair wiring or
thin coaxial wiring.
Click on these
links for more details on
LAN wiring:
● Detail: twisted-pair
wiring
● Detail: thin coaxial
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wiring
● Detail: computer
connections
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Network Basics
NETWORKS
DETAIL
Wiring: twistedpair
The most common wiring
used for LANs is twistedpair wiring, similar to the
wiring used for
telephones. This wiring
connects the computers or
other network devices to a
central hub. The use of
telephone-type wiring
makes it easy for the
persons who administer
your telephone wiring to
administer the network
wiring as well.
RJ-45 connectors are used
to connect the twistedpair wiring to the
computer and to the hub.
The wire for a network
can be graded in a number
of categories; Category 5
wiring is the most popular
grade. Category 5 wiring
has superior electrical
characteristics, and we
strongly recommend it for
all twisted-pair
networking applications.
The wire grade is usually
marked on the cable
jacket.
The equipment for a
twisted-pair LAN
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Network Basics
commonly operates at a
data rate of either 10
Mbps (megabits per
second) or 100 Mbps.
Category 5 wiring is
required for 100-Mbps
operation. A 10-Mbps
LAN can run on either
Category 3 or Category 5
wiring (though we
strongly recommend
Category 5). At either data
rate, cables may extend up
to 100 meters (328 feet)
from the hub to the
computer.
A twisted-pair network
running at 10 Mbps is
called a type 10Base-T
network. A twisted-pair
network running at 100
Mbps is called a type
100Base-T network.
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NETWORKS
DETAIL
Wiring: thin
coax
An alternative to twistedpair wiring is thin coaxial
cabling, often called thin
coax. This cabling is
known as RG-58A or RG58U cable, and has an
impedance of 50 ohms.
(It looks similar to the 75ohm thin coaxial cable
used in television
installations, but the
television cable will not
work in a network.)
The connectors used with
thin coax are BNC
connectors. The cable is a
continuous cable, up to
185 meters (606 feet)
long, made up of shorter
segments with BNC
connectors at each end. It
connects to computers
and other devices along
its length using BNC "T"
connectors, and there is a
50-ohm terminator at
each end of the cable.
This cabling scheme does
not use a hub.
A thin coaxial LAN
operates at a data rate of
10 mbps (megabits per
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Network Basics
second), and is known as
a type 10Base2 network.
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Network Basics
NETWORKS
DETAIL
Computer
connections
For twisted-pair
LANs: A desktop
computer connects to a
twisted-pair LAN through
a network interface card
(NIC) that resides in a
slot in the computer, or
through a similar
interface built in to the
computer itself. The RJ45 plug of the network
cable plugs into an RJ-45
jack on the card or in the
computer. A portable
computer may have a
built-in connection using
an RJ-45 jack, or it may
use a PC card that inserts
into a PC card slot in the
computer. (Some PC
cards take up two slots
and have room for an RJ45 jack that is integral
with the card; others take
up only a single slot but
require a short cable that
provides the RJ-45 jack.)
For thin coaxial
LANs: A desktop
computer typically
connects to a thin coaxial
LAN through a network
interface card (NIC) ;
built-in BNC connections
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are uncommon. Portable
computers connecting to
thin coaxial LANs use a
PC card with a short cable
that provides a BNC
connection. In all cases,
the LAN cable connects to
the computer through a
BNC "T" connector.
Hidden network
cables and
equipment: In many
network installations, the
hubs are kept in
equipment closets and the
cables are hidden in the
walls. In these
installations, wall outlets
with RJ-45 jacks are the
only visible components
of the network wiring. For
such a network, you use a
short length of network
cable to connect from the
computer to the wall jack.
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Network Basics
NETWORKS
Wireless LANs
In a wireless LAN,
information travels
through the air in radiofrequency signals instead
of through wires. This
makes wireless LANs very
flexible, and setup and
reconfiguration are very
easy. Communication
speeds on wireless LANs,
however, tend to be
slower than on wired
LANs, and it generally
takes more work to make
a wireless LAN as secure
as a wired LAN.
Most wireless LANs
conform to one of the
subsets of the IEEE
802.11 standard; the most
common subset is
currently 802.11b. Data
rates for 802.11b LANs
can be as high as 11 Mbps
(megabits per second).
Typically a wireless device
in an 802.11b LAN can
transmit signals across a
distance of about 30
meters (100 feet) in a
semi-open office (no
walls) and still maintain a
data rate of 11 Mbps. It is
possible to extend the
range to about 100 meters
(300 feet), but at such a
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Network Basics
distance the data rate
drops off to 1 Mbps.
802.11b wireless LANs
operate in the 2.4 GHz
frequency band. There are
several channels
(frequencies) that
wireless LANs can use in
this range. Government
regulations prescribe
which channels may be
used in various parts of
the world.
There are two basic
wireless networking
topologies -infrastructure mode and
ad hoc mode; these are
described in the detail
pages (see below).
Click on these
links for more details on
wireless LAN topologies:
● Detail:
infrastructure
mode
● Detail: ad hoc
mode
● Detail: standalone
peripheral
connections
● Detail: computer
connections
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Network Basics
NETWORKS
DETAIL
Infrastructure
mode
Terminology:
Infrastructure mode is
referred to as a "basic
service set" (BSS). It's
topology is sometimes
called a "star topology",
and it may also be called
"enterprise mode"
because it is the preferred
topology for large
networks. On a network
of Apple Macintosh
computers, it may be
called an "Airport
network".
Topology: In
infrastructure mode, all
signals travel through an
access point. Like the hub
in a wired LAN, the access
point re-sends the
incoming signals out to
the computers and other
devices on the network.
(The access point
performs additional
functions when a wireless
LAN is connected to a
wired LAN.)
Infrastructure mode is
suitable for wireless LANs
of all sizes.
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In infrastructure mode
the access point sets the
channel for all device that
communicate through it.
A wireless LAN can have
multiple access points.
This can expand the
capacity of the network
and extend its range,
allowing users to roam
with their portable
computers and still stay
connected to the network.
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Network Basics
NETWORKS
DETAIL
Ad hoc mode
Terminology:
Infrastructure mode is
referred to as an
"independent basic service
set" (IBSS). It is
sometimes called "peer-topeer mode". On a network
of Apple Macintosh
computers, it may be
called "computer-tocomputer mode".
Topology: In ad hoc mode
the wireless devices on a
network communicate
directly with each other,
and access points are not
used. Ad hoc mode is used
for very small networks.
Performance in an ad hoc
network degrades as you
add more devices to the
network; typically, ad hoc
networks connect no more
than six devices.
In ad hoc mode you can
select the channel. Make
sure that all devices on the
network are set to the
same channel.
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Network Basics
NETWORKS
DETAIL
Standalone
peripherals
Not all wireless
connections are network
connections. Though the
distinctions may often be
somewhat blurry, some
wireless technologies -such as the Bluetooth
technology that is
becoming popular in
mobile phones and
handheld computers -are more about
connecting a computing
device to a peripheral,
rather than connecting
computers and other
devices in a network.
For instance, when a
handheld computer
connects with a walk-up
wireless printer, or when
a mobile phone connects
with a vending machine,
the interactions between
them are typical of a
standalone computer
talking to a peripheral
device. In essence, the
wireless connection
replaces the cable in a
standard peripheral
connection. Compared to
network connections,
such wireless peripheral
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Network Basics
connections work at short
ranges and slow speeds.
(In this tutorial, we will
concentrate on the
networking that is
typified by 802.3-type
wired networks and
802.11b-type wireless
networks.)
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Network Basics
NETWORKS
DETAIL
Computer
connections
Connections at the
computer for wireless
networking connections
are simpler than wired
ones just because there
are no wires to connect.
Wireless connections are
most common in portable
computers. Increasingly,
notebook computers
come with built-in
wireless networking. For
notebook computers that
don't have built-in
networking, you can plug
a wireless networking
card into the computer's
PC card (PCMCIA) slot.
(Wireless networking is
based on radio
technology, and in many
add-on cards the antenna
protrudes slightly from
the PC card slot.)
Desktop PCs can have
wireless networking, too.
A typical arrangement is
for an adapter in a
desktop PC to contain a
PC card slot, into which
you plug the same kind of
wireless networking card
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Network Basics
that you would use in a
notebook computer.
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Network Basics
NETWORKS
Mixed LANs
Mixed LANs combine
wired and wireless LANs,
taking advantage of the
strong points of each. For
example, a mixed LAN
can provide the flexible
connections of wireless
with the high overall
throughput of a wired
LAN. Such an
arrangement makes it
particularly easy for
mobile workers to
connect their notebook
computers to the
network.
You create a mixed LAN
by plugging the network
cable from a wired LAN
into a port on a wireless
access point. In addition
to acting as a hub for the
wireless portion of the
network, the access point
acts as a bridge to the
wired portion. In a typical
case, when a computer
with a wireless LAN card
comes within range of the
access point, it connects
through the access point
to the LAN (both the
wired and wireless
portions) and to all the
computers and other
resources on the LAN.
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Network Basics
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Network Basics
NETWORKS
L is for Local
The "local" in "local area
network" means that the
network is in a single
location. A LAN can be
small enough to serve a
home office or a small
business, or it can be
large enough to serve a
school, a hospital, or a
substantial business or
public office. It can cover
several buildings, as long
as they can all be
connected into a single
network. Several types of
LAN equipment are
available to expand a LAN
beyond the workgroupsized unit typically served
by a single hub.
Note that the definition of
a local area network does
not include broader
networks such as the
Internet or a corporate
network with locations in
many cities or countries.
These broader networks
are often called WANs, or
wide area networks. It is
possible for a LAN to
connect to such a network
through a gateway -- a
device that connects
different types of
networks. The gateway
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Network Basics
can be a separate piece of
equipment, or it can
include the LAN hub.
(This latter type of
gateway is becoming
increasingly common for
Internet connections,
particularly for highspeed DSL connections.)
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Network Basics
NETWORKS
Addresses
Each device on the
network has a unique
address. This allows you
to communicate with a
specific computer (or
other device, such as a
printer). That way, your email doesn't go to
everybody, and your print
job doesn't get printed
simultaneously on all
printers on the network.
There are several
addressing schemes for
networks. Of these, the
most popular is that of the
Internet Protocol (IP). In
addition to being used on
the Internet, IP
addressing can also be
used for standalone
networks that don't
connect to the Internet.
The network addresses
shown in the illustration
are sample IP addresses.
Other network addressing
schemes you may
encounter include IPX
(used with Novell
NetWare networks), DLC,
and AppleTalk. In this
tutorial, we limit our
discussion of network
addressing to IP
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