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Page 46 / 228 Scroll up to view Page 41 - 45
Chapter 4 Broadband
ericom D1000 modem User’s Guide
46
Constant Bit Rate (CBR)
Constant Bit Rate (CBR) provides fixed bandwidth that is always available even if no data is being
sent. CBR traffic is generally time-sensitive (doesn't tolerate delay). CBR is used for connections
that continuously require a specific amount of bandwidth. A PCR is specified and if traffic exceeds
this rate, cells may be dropped. Examples of connections that need CBR would be high-resolution
video and voice.
Variable Bit Rate (VBR)
The Variable Bit Rate (VBR) ATM traffic class is used with bursty connections. Connections that use
the Variable Bit Rate (VBR) traffic class can be grouped into real time (VBR-RT) or non-real time
(VBR-nRT) connections.
The VBR-RT (real-time Variable Bit Rate) type is used with bursty connections that require closely
controlled delay and delay variation. It also provides a fixed amount of bandwidth (a PCR is
specified) but is only available when data is being sent. An example of an VBR-RT connection would
be video conferencing. Video conferencing requires real-time data transfers and the bandwidth
requirement varies in proportion to the video image's changing dynamics.
The VBR-nRT (non real-time Variable Bit Rate) type is used with bursty connections that do not
require closely controlled delay and delay variation. It is commonly used for "bursty" traffic typical
on LANs. PCR and MBS define the burst levels, SCR defines the minimum level. An example of an
VBR-nRT connection would be non-time sensitive data file transfers.
Unspecified Bit Rate (UBR)
The Unspecified Bit Rate (UBR) ATM traffic class is for bursty data transfers. However, UBR doesn't
guarantee any bandwidth and only delivers traffic when the network has spare bandwidth. An
example application is background file transfer.
Page 47 / 228
ericom D1000 modem User’s Guide
47
C
HAPTER
5
Wireless LAN
5.1
Overview
This chapter describes how to perform tasks related to setting up and optimizing your wireless
network, including the following.
•
Turning the wireless connection on or off.
•
Configuring a name, wireless channel and security for the network.
•
Using WiFi Protected Setup (WPS) to configure your wireless network.
•
Setting up multiple wireless networks.
•
Using a MAC (Media Access Control) address filter to restrict access to the wireless network.
•
Performing other performance-related wireless tasks.
5.1.1
What You Can Do in the Wireless LAN Screens
This section describes the Device’s
Network Setting > Wireless
screens. Use these screens to set
up your Device’s wireless connection.
•
Use the
General
screen to enable the Wireless LAN, enter the SSID and select the wireless
security mode (
Section 5.2 on page 48
).
•
Use the
More AP
screen (see
Section 5.3 on page 54
) to set up multiple wireless networks on
your Device.
•
Use the
MAC Authentication
screen to allow or deny wireless clients based on their MAC
addresses from connecting to the Device (
Section 5.4 on page 56
).
•
Use the
WPS
screen (see
Section 5.5 on page 57
) to enable or disable WPS, generate a security
PIN (Personal Identification Number) and see information about the Device’s WPS status.
•
Use the
WDS
screen (see
Section 5.6 on page 59
) to set up a Wireless Distribution System, in
which the Device acts as a bridge with other access points.
•
Use the
WMM screen
to enable Wi-Fi MultiMedia (WMM) to ensure quality of service in wireless
networks for multimedia applications (
Section 5.7 on page 60
).
•
Use the
Scheduling
screen (see
Section 5.8 on page 60
) to configure the dates/times to enable
or disable the wireless LAN.
•
Use the
Advanced
screen to configure wireless advanced features (
Section 5.9 on page 61
).
You don’t necessarily need to use all these screens to set up your wireless connection. For example,
you may just want to set up a network name, a wireless radio channel and security in the
General
screen.
Page 48 / 228
Chapter 5 Wireless LAN
ericom D1000 modem User’s Guide
48
5.1.2
What You Need to Know About Wireless
Wireless Basics
“Wireless” is essentially radio communication. In the same way that walkie-talkie radios send and
receive information over the airwaves, wireless networking devices exchange information with one
another. A wireless networking device is just like a radio that lets your computer exchange
information with radios attached to other computers. Like walkie-talkies, most wireless networking
devices operate at radio frequency bands that are open to the public and do not require a license to
use. However, wireless networking is different from that of most traditional radio communications in
that there a number of wireless networking standards available with different methods of data
encryption.
Finding Out More
See
Section 5.10 on page 63
for advanced technical information on wireless networks.
5.1.3
Before You Start
Before you start using these screens, ask yourself the following questions. See
Section 5.1.2 on
page 48
if some of the terms used here are not familiar to you.
•
What wireless standards do the other wireless devices in your network support (IEEE 802.11g,
for example)? What is the most appropriate standard to use?
•
What security options do the other wireless devices in your network support (WPA-PSK, for
example)? What is the strongest security option supported by all the devices in your network?
•
Do the other wireless devices in your network support WPS (Wi-Fi Protected Setup)? If so, you
can set up a well-secured network very easily.
Even if some of your devices support WPS and some do not, you can use WPS to set up your
network and then add the non-WPS devices manually, although this is somewhat more
complicated to do.
•
What advanced options do you want to configure, if any? If you want to configure advanced
options such as Quality of Service, ensure that you know precisely what you want to do. If you do
not want to configure advanced options, leave them as they are.
5.2
The General Screen
Use this screen to enable the Wireless LAN, enter the SSID and select the wireless security mode.
Note: If you are configuring the Device from a computer connected to the wireless LAN
and you change the Device’s SSID, channel or security settings, you will lose your
wireless connection when you press
Apply
to confirm. You must then change the
wireless settings of your computer to match the Device’s new settings.
Click
Network
Setting
>
Wireless
to open the
General
screen.
Page 49 / 228
Chapter 5 Wireless LAN
ericom D1000 modem User’s Guide
49
Figure 19
Network Setting > Wireless > General
The following table describes the labels in this screen.
Table 7
Network Setting > Wireless > General
LABEL
DESCRIPTION
Wireless Network Setup
Wireless
Select
Enable Wireless LAN
to activate wireless LAN.
Wireless Network Settings
Wireless
Network Name
(SSID)
The SSID (Service Set IDentity) identifies the service set with which a wireless device is
associated. Wireless devices associating to the access point (AP) must have the same
SSID.
Enter a descriptive name (up to 32 English keyboard characters) for the wireless LAN.
Hide SSID
Select this check box to hide the SSID in the outgoing beacon frame so a station cannot
obtain the SSID through scanning using a site survey tool.
Client Isolation
Select this to keep the wireless clients in this SSID from communicating with each other
through the Device.
MBSSID/LAN
Isolation
Select this to keep the wireless clients in this SSID from communicating with clients in
other SSIDs or wired LAN devices through the Device.
Select both
Client Isolation
and
MBSSID/LAN Isolation
to allow this SSID’s wireless
clients to only connect to the Internet through the Device.
Channel
Selection
Set the operating channel manually by selecting a channel from the
Channel Selection
list or use
Auto
to have it automatically determine a channel to use.
Page 50 / 228
Chapter 5 Wireless LAN
ericom D1000 modem User’s Guide
50
5.2.1
No Security
Select
No Security
to allow wireless stations to communicate with the access points without any
data encryption or authentication.
Note: If you do not enable any wireless security on your Device, your network is
accessible to any wireless networking device that is within range.
Figure 20
Wireless > General: No Security
5.2.2
Basic (WEP Encryption)
WEP encryption scrambles the data transmitted between the wireless stations and the access points
(AP) to keep network communications private. Both the wireless stations and the access points
must use the same WEP key.
Note: WEP is extremely insecure. Its encryption can be broken by an attacker, using
widely-available software. It is strongly recommended that you use a more
effective security mechanism. Use the strongest security mechanism that all the
wireless devices in your network support. For example, use WPA-PSK or WPA2-PSK
if all your wireless devices support it, or use WPA or WPA2 if your wireless devices
support it and you have a RADIUS server. If your wireless devices support nothing
stronger than WEP, use the highest encryption level available.
Your Device allows you to configure one 64-bit or 128-bit WEP key.
Operating
Channel
This field displays the channel the Device is currently using.
Security Level
Security Mode
Select
Basic
(WEP)
or
More Secure
(WPA(2)-PSK, WPA(2)) to add security on this
wireless network. The wireless clients which want to associate to this network must have
same wireless security settings as the Device. When you select to use a security, additional
options appears in this screen.
Or you can select
No Security
to allow any client to associate this network without any
data encryption or authentication.
See the following sections for more details about this field.
WPS/WiFi
Button
Select the checkbox to enable the WPS/WiFi button.
Apply
Click this to save your changes.
Cancel
Click this to restore your previously saved settings.
Table 7
Network Setting > Wireless > General (continued)
LABEL
DESCRIPTION

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