20 meters
is the maximum distance with stable 11Mbps and good
signal. This is in a house with only soft walls (no
brigs). Is this normal?
Many factors may affect
the operating range of a wireless LAN, such as building
material, partition types, and external interference
sources. The more data rate it is, the shorter operating
range it may be. In other words, the longer operating
range it is, the less data rate it may be. Our data
sheet states that the operating range is 300m that is in
the condition of open environment with the workable
connection at data rate of 1Mbps. Since we don't know
the details of your environment, we are unable to have a
precise figure, but 20m is reasonable. You may try to
use difference channels if you are really serious about
the distance. Sometimes, a channel may be better than
the other channels.
Is it possible to fix
or alter the MAC address of the Access Point or Wireless
LAN PC Card?
The MAC address is
programmable, but you have to apply it in advance from
IEEE to make it unique. We have given a unique MAC
address for each Access Point and Wireless LAN PC Card
according to IEEE regulations. Generally, end users need
not to make any changes.
I have a client
computer with a Wireless LAN PC Card installed receiving
the signal strength at around 50%. If I add more Access
Points running at the same channel at the same place and
connecting through a switch or hub. What will happen to
the signal strength on the client computer? Will the
signal strength be enhanced or reduced? Will this help
with the multipath problem? Assuming we replace the
antennas of the Access Point with a flat panel patch
antenna or we have an array of 4 or 9 or even 16
antenna. What will happen on the client computer?
If all Access Points
have the same SSID, they will form a single WLAN cell,
and the client computer will link to only one of these
Access Points. If they have different SSID, they will
form several WLAN cells, and your computer will also
link to only one of these Access Points with the same
SSID. No matter what condition, the signal strength may
be better because of more Access Points transmitting,
but the signal quality may be worse because the other
Access Points will interfere with the linked Access
Point. Since all Access Points cannot be physically
situated in the same place, they must have some space or
distance among each other, the link quality of each
Access Point for a specific location may not be the
same. As a result, the multipath problem might be
solved, but not always. However, this benefit should
total up the loss of running at the same channel. That
is undoubtedly true that an antenna with good
performance will help to the signal strength and the
link quality.
I cannot connect to
Internet from my portable computer with a Wireless LAN
PC Card. I can only do that when I connect a network
cable directly from my portable computer to a switch.
What can the problem be?
Please make sure that
both your notebook and Access Point are at the same
domain. You may adjust the IP address either on your
notebook or Access Point to make them at the same
domain.
I tried to transfer a
file of 72,5MB from one computer to the other. With
10Mbit Ethernet cable, it took 2 minutes and 20 seconds.
Then I changed it to a wireless connection with full
signal and 11Mbit and it took 6 minutes and 20 seconds -
nearly 3 times as slow. Is this normal or is there a
configuration problem?
In the normal
condition, our experiment indicates that the practical
transmit rate is between 4.3 to 5.5Mbps when the data
rate is running at 11Mbps. Your figures are much less
than ours. Please make sure the followings: 1. Set the
channel of each Access Point to different than others at
least an interval of three if you turn on more than one
Access Point. Same channel among all Access Points
downgrades the performance. 2. Keep the area around the
antenna clear to avoid any interference from materials
that could block radio transmission, such as metal
objects, electronic devices, and cordless telephones.
Adjust the direction of the PC slightly to improve the
linking quality. 3. Using "Wireless LAN Configuration
Utility", Tx Rate: choose "Fully Automatic" for best
performance and longest range; PS Mode: choose
"Disable".
I have an Access Point
and a Wireless LAN PC Card. They all work perfectly in a
Windows networking environment. At this moment, I have
an UTP cable Ethernet connection between my computer and
the Cable Modem and I would like to replace this with
the wireless networking. What do I have to do?
Please do the following
steps: 1. Switch the UTP cable connected to LAN card to
the Access Point. 2. Follow the Access Point's user's
manual to install it. Keep all default settings but set
the IP Filtering to disable. You may use the APUtility
to configure the Identifier of IP Filtering to disable,
or use the SNMP Manager to click off the IP Routing in
the menu of Setup -> Bridge -> Filtering. 3.
Follow the Wireless LAN PC Card's user's manual to
install it. Replicate the TCP/IP settings of LAN card to
the Wireless LAN PC Card's, such as IP address. After
doing the above steps, you are able to access the
Internet. Your ISP may lock your LAN card to provide the
service, if it is the case, please ask your ISP for
help.
How many
non-overlapping channels supported by wireless LAN
allowed in Europe, US, France, and Japan?
Regardless of whether
the data rate is 1, 2, 5.5, or 11 Mbps, the channel
bandwidth is about 17 to 22 MHz for DSSS systems.
Therefore, the ISM band will accommodate up to four
non-overlapping channels depends on country
individually. For example, there are 3 non-overlapping
channels in Europe, 3 in US, 1 in France, and 4 in
Japan.
We have a major
reseller interested in your wireless products. They have
asked us to comment on the equipment of quality of
service and data throughput. Could your engineer provide
us with their thoughts?
The Quality of Service
(QoS) for our wireless products is measured by the
operating range, the receive sensitivity, and the data
throughput. These QoS data for each product are provided
in our brochure. For wireless product, the measurement
of these figures need expensive test equipment and
special environment, and there is no easy means to
measure them at customer end.
Whether technically the
Access Point has stronger transmission power than the
Wireless LAN PC Card?
In point of the
transmit power, they are no big difference, but an
additional access point can theoretically double the
distance between two PC cards.
The IP address I now
always get from my ISP's DHCP server is: 80.62.54.246.
Can you from this say what IP address, subnet mask, and
gateway I should use in the Access Point and in the
Wireless LAN PC Card on the portable?
For the Card. IP
address is 80.62.54.246., subnet mask is
255.255.255.254, and gateway is as your ISP assigned.
For the Access Point, Eth_IP_Address is 192.168.1.1,
Eth_SubMask is 255.255.255.0., and set DHCP Client to
Disable. Please use supplied utility program, APUtility
(or DFU), to configure the Access Point by USB
connecting. Using SNMP manager is more difficult to
configure the Access Point in this case.
I have an Access Point
and a Wireless LAN PC Card. It all works together with
my cable modem, but the speed is significantly slower
than with my normal LAN adapter. With a cat-5 cable the
speed is around 70Kbyte/s, while with the WLAN, it is
around 17Kbyte/s most of the time. I have reached 65 to
70Kbyte/s with WLAN, but in 90% of the time it is much
lower. What can be the cause of this?
There are many factors
affecting the data transfer rate of a wireless LAN such
as distance, obstacle, radio interference, direction of
antenna. Please try the followings to improve the data
transfer rate. 1) Keep the area around the antenna
clear to avoid any interference from materials that
could block radio transmission, such as metal objects,
electronic devices, and cordless telephones. 2)
Changing the channel of the Access Point may flee from
the radio interference. 3) If there is more than one
Access Point in your area, you shall assign the channel
of each one as far from others as you can. Overlapping
the channel surely degrades the rate. 4) The shorter
distance between the Card and the Access Point, the
better rate you get. 5) The higher position to place
the Access Point normally has a better rate. 6)
Adjusting the direction of the Card slightly may also
have the rate improved.
Since the Wireless LAN
PC Cards are designed to work in different countries
with different numbers of channels, how does the Card
know which region it is in and what channels it ought to
try to use?
In general, each
country has its own firmware specified the channels and
corresponding frequencies to be used. If the topology is
the infrastructure, then the Access Point dominates the
channel assignment, and the Wireless LAN PC Card
searches the available Access Point and connects to the
best one. On the other hand, if the topology is the
ad-hoc, the all Wireless LAN Cards shall be set to the
same channel so that they can communicate each
other.
The Access Points
support 128-bit encryption. Does this mean that all
files that get transferred are safe from hackers or
not?
Speaking of the data
security, the WEP 128-bit is reasonably strong. The
security afforded by the algorithm relies on the
difficulty of discovering the secret key through a
brute-force attack. This in turn is related to the
length of the secret key and the frequency of changing
keys through a brute-force attack. Our Access Points
adopt RC4, which is a variable key-size stream cipher
with byte-oriented operations. The algorithm is based on
the use of a random permutation. Analysis shows that the
period of the cipher is overwhelmingly likely to be
greater than 10exp100. Eight to sixteen machine
operations are required per output byte, and the cipher
can be expected to run very quickly in software.
Independent analysts have scrutinized the algorithm and
it is considered secure.
20 meters
is the maximum distance with stable 11Mbps and good
signal. This is in a house with only soft walls (no
brigs). Is this normal?
With the current SRAM
configurations, we are supporting up to 64 users
concurrently. Speaking of at the acceptable access
speed, the figure of 16 to 20 users is reasonable.
How can I configure two
or more Access Points as a Wireless Bridge? How can I
operate it?
The SNMP MANAGER is
used to configure the Access Point. For each Access
Point, enter the Operational Mode by clicking Setup,
Wireless LAN, Operational Settings of SNMP, and
Advanced, choosing the Wireless Bridge. Two options are
available, one is the Point to Point and the other one
is the Point to MultiPoint. For the Point to Point, the
Wireless Bridge can communicate with a specific Remote
MAC Address. You need to define the Remote MAC Address,
which corresponds to the MAC Address of the Wireless
Bridge of the Remote LAN. For the Point to Multipoint,
the Wireless Bridge can communicate with any Wireless
Bridge available in the same channel. When Authorized
Algorithm is enabled, the Wireless Bridge can
communicate with any Wireless Bridge whose MAC Addresses
exist in the Authorization Table. In addition, the ESSID
and the channel of all Access Points have to be set at
same value.
Can I use SNMP MANAGER
to configure Access Points that are not in the same
network?
No, SNMP MANAGER cannot
communicate with Access Points that are not in the same
network even through two networks are connected by
bridges.
Can I use Ping command
to ping Access Points configured to a bridge mode in
other networks?
No, the Ping command
cannot ping Access Points configured to bridge modes in
other networks, but it can ping all network interface
cards in other networks.
The Access Point
crashes very often when simply doing SNMP MANAGER
requests.
Each time when you
modify the Access Point's settings, please wait at least
5 seconds to issue the next command for writing process
completion. Otherwise, the Access Point sometimes may
fail without response.
Could you please send
me a list with all SNMP variables that could be
used?
All SNMP variables that
could be used are defined in the "AT76C510.mib" file.
The file is located in the path where SNMP MANAGER is
placed c:\Program Files\TWL-A11 Access point Utilities,
for example.
The SNMP MANAGER
installed fine, but I cannot establish contact. It can
find the Access Point when I ask it to search, but it
cannot connect to it: "Access Point not found" - when I
push the Connect bottom.
Please make sure that
both your PC and Access Point are at the same domain,
i.e. the first three fields of IP address. The factory
setting of Access Point's IP address is 192.168.1.100.
You may change the IP address either on your PC or
Access Point to make them at the same domain.
I cannot see the Access
Point in the Network of the Control Panel. Why
not?
That's correct, you
cannot see the Access Point in the Network of the
Control Panel, but you can see it in Device Manager tab
of System in Control Panel by the name of "ATMEL DFU
Devices" or "AP/Bridge DFU Devices" when connected by
USB cable.
In some environment, I
want to be able to allow an IP range (or specific Mac
addresses) and at the same time not allow some IP
addresses within the IP range. Can I do that?
Our Access Point
provides Authorized MAC Addresses table setting to
filter out an unauthorized access, but no deny table nor
IP range.
Can the Access Points
provide WEP 128-bit encryption MD5?
No, the encryption
function is supported by chipsets and it is impossible
to change it from RC4 to MD5.
Can be an Access Point
placed as repeater between two floors without connecting
to a wired LAN?
No, our Access Point
does not support the repeater function.
Is it possible to
connect the Access Point directly to an ISDN or ADSL
line?
Yes, the Access
Point can connect to ISDN and ADSL by using a crossover
cable. For ADSL, you have to change the configuration
setting of the IP Filtering to disable so that it can
work with PPPoE protocol. As for ISDN, you may use the
default settings.
I have got a number of
Access Points, and I shall use them to get a wireless
connection from one building (the backbone) to wired
networks in 3 other buildings. In building 1 (backbone)
I plan to use one Access Point configured to bridge
Point to MultiPoint with 2 antennas, one antenna
pointing to building 2, the other antenna pointing to
building 3 and 4. My question is - How shall I configure
the Access Point's in buildings 2, 3 and 4. I have the
choice between clients - bridge point to point with the
MAC address to the backbone Access Point- and bridge
Point to MultiPoint.
It is
impossible to configure the Access Point to one antenna
pointing to building 2 and the other antenna pointing to
building 3 and 4. In your case, all Access Points may
configure to bridge of Point to MultiPoint.
What is the
meaning of DTIM?
DTIM is
the Interval of the Access Point sending its broadcast
traffic. The unit measure of interval is beacon. The
default value is 2.
I would like
to replace the attached antennas of the Access Point. I
want to know how to get the little black antennas off? I
pulled, twisted, and turned, but it could not remove
move them at all. Is there a trick or something, or
can't they be removed at all? How do you connect an
extra antenna?
In
order to maintain the connectivity in good condition
between the antenna and the SX connector, we
intentionally design the mechanism to be tight enough so
that it can be hardly removed. The repeated separation
action may be harmful to the connectivity. That is the
reason we do not recommend end users to separate them
off too often.
However, if you intend to replace the attached
antenna, you can just pull them holding the connecter
round part only. Please do not hold the long stick when
you pull, which may damage it. In fact, the antennas are
originally pressed into the connectors by hand, without
any other accessory. Please try again.
When I then
close the SNMP manager, there is a Windows error message
saying that the SNMP manager caused an error in
KERNL32.DLL, and that I should restart the PC.
We
think your Windows system has some problems probably.
Reinstall Windows systems may solve this problem.
We have an
Access Point. On trying to run Access Point the error
"drivers not loaded" appears. We have tried re-loading
the software from disc but no joy. It did run once on a
different PC connected by USB. We are trying to connect
using Ethernet (100Mbit).
According to your description, we think
you may try to run APUtility without the driver properly
loaded. Please delete "other devices" in the Device
Manager if it exists, then follow the instruction
described in the Section 2.7 of User's Manual to install
the driver. After installing the driver, you are able to
use supplied APUtility to configure the Access Point
through an USB connection. However, you may use supplied
SNMP to configure the Access Point through an Ethernet
(10 Base-T) without its driver.
I don't know
how to resolve this problem - IPX in my network. I have
8 Access Points and I configure one of them to Access
Point mode and others to Access Point Client mode. I
cannot make them work.
When
running IPX/SPX, you have to set the IP Filtering of AP
to disable. You may use APUtility to configure the
Identifier of IP Filtering to disable, or use SNMP to
click off the IP Routing in the menu of Setup ->
Bridge -> Filtering. In addition, if you configure
the Access Point to Access Point Client mode, no matter
what protocol you are using, any Station from the remote
LAN can successfully communicate with any Station of the
central LAN, as if all of them belonged to the same
physical LAN, but they cannot communicate with any
Station of another remote LAN. Please also note that
disable the IP Filtering may degrade the network
performance when you are running TCP/IP.
The Access
Point supports 128-bit Encryption. Does this mean that
all files that get transferred are safe from hackers or
not?
Speaking of the data security, the WEP
128-bit is reasonably strong. The security afforded by
the algorithm relies on the difficulty of discovering
the secret key through a brute-force attack. This in
turn is related to the length of the secret key and the
frequency of changing keys through a brute-force attack.
Our Access Points adopt RC4, which is a variable
key-size stream cipher with byte-oriented operations.
The algorithm is based on the use of a random
permutation. Analysis shows that the period of the
cipher is overwhelmingly likely to be greater than
10exp100. Eight to sixteen machine operations are
required per output byte, and the cipher can be expected
to run very quickly in software. Independent analysts
have scrutinized the algorithm and it is considered
secure.
I have got
two Access Points recently and tried to make them work.
I installed the utility software into my Windows 2000
and Windows XP computers and connected PCs to the Access
Point via a hub. Actually I have tried a direct
connection using a crossover cable, too. For some
reason, I just couldn't get the connection. I couldn't
find the Access Point from the SNMP Manager, and
couldn't even ping the default IP address of that Access
Point (suppose to be 192.168.1.100/255.255.254.0) from
my computer. What happen? I have to test and evaluate it
before the end of this week and see if we can use this
type of units for our customer. Your early response is
highly appreciated
First,
please verify the LED indicators by referring to the
Table 1 on the pager 4 of user's manual stored in the
supplied CD-ROM. Then, connect the Access Point to your
computer by an USB cable. Afterward you may try to
access the Access Point by using supplied utility
APUtility. SNMP can access to the Access Point on
condition that the IP of your computer and that of the
Access Point are in the same domain, i.e., the first 3
fields of IP. The Ping command applies the same rule.
Keep the hub only have these two connections to prevent
the connection to a DHCP server from affecting the IP
address of the Access Point.
What is the
function Access Point Client?
This
mode allows the connection of one or more remote LANs
with a central LAN, creating thus an extended single
virtual LAN. In this way, any Station from the remote
LAN can successfully communicate with any Station of the
central LAN, as if all of them belonged to the same
physical LAN. Wireless Stations can be associated with
the Access Point Clients. The Access Point conducts the
designated traffic to the appropriate wired or Wireless
Station. User needs to define the Preferred BSS that
corresponds to the MAC Address of the desired Access
Point.
I have
installed the Wireless LAN PC Card into my PC under
Windows XP. I am having problems with Bridging in
Windows XP. I have been trying to bridge fast Ethernet
and wireless networks. I selected the two and clicked
bridge but it always stops at some point telling me an
"unexpected error" had occurred. Afterwards I could find
the bridge and the fast Ethernet seemed to be properly
assigned. Unfortunately the wireless network hasn't
joined the bridge nor can it be added afterwards.
With the current SRAM
configurations, we are supporting up to 64 users
concurrently. Speaking of at the acceptable access
speed, the figure of 16 to 20 users is reasonable.
How can I configure two
or more Access Points as a Wireless Bridge? How can I
operate it?
The SNMP MANAGER
is used to configure the Access Point. For each Access
Point, enter the Operational Mode by clicking Setup,
Wireless LAN, Operational Settings of SNMP, and
Advanced, choosing the Wireless Bridge. Two options are
available, one is the Point to Point and the other one
is the Point to MultiPoint. For the Point to Point, the
Wireless Bridge can communicate with a specific Remote
MAC Address. You need to define the Remote MAC Address,
which corresponds to the MAC Address of the Wireless
Bridge of the Remote LAN. For the Point to Multipoint,
the Wireless Bridge can communicate with any Wireless
Bridge available in the same channel. When Authorized
Algorithm is enabled, the Wireless Bridge can
communicate with any Wireless Bridge whose MAC Addresses
exist in the Authorization Table. In addition, the ESSID
and the channel of all Access Points have to be set at
same value.
Can I use SNMP
MANAGER to configure Access Points that are not in the
same network?
No, SNMP MANAGER
cannot communicate with Access Points that are not in
the same network even through two networks are connected
by bridges.
Can I use Ping
command to ping Access Points configured to a bridge
mode in other networks?
No, the Ping
command cannot ping Access Points configured to bridge
modes in other networks, but it can ping all network
interface cards in other networks.
The Access Point
crashes very often when simply doing SNMP MANAGER
requests.
Each time when you
modify the Access Point's settings, please wait at least
5 seconds to issue the next command for writing process
completion. Otherwise, the Access Point sometimes may
fail without response.
Could you please
send me a list with all SNMP variables that could be
used?
All SNMP variables
that could be used are defined in the "AT76C510.mib"
file. The file is located in the path where SNMP MANAGER
is placed c:\Program Files\TWL-A11 Access point
Utilities, for example.
The SNMP MANAGER
installed fine, but I cannot establish contact. It can
find the Access Point when I ask it to search, but it
cannot connect to it: "Access Point not found" - when I
push the Connect bottom.
Please make sure
that both your PC and Access Point are at the same
domain, i.e. the first three fields of IP address. The
factory setting of Access Point's IP address is
192.168.1.100. You may change the IP address either on
your PC or Access Point to make them at the same
domain.
I cannot see the
Access Point in the Network of the Control Panel. Why
not?
That's correct,
you cannot see the Access Point in the Network of the
Control Panel, but you can see it in Device Manager tab
of System in Control Panel by the name of "ATMEL DFU
Devices" or "AP/Bridge DFU Devices" when connected by
USB cable.
In some
environment, I want to be able to allow an IP range (or
specific Mac addresses) and at the same time not allow
some IP addresses within the IP range. Can I do
that?
Our Access Point
provides Authorized MAC Addresses table setting to
filter out an unauthorized access, but no deny table nor
IP range.
Can the Access
Points provide WEP 128-bit encryption MD5?
No, the encryption
function is supported by chipsets and it is impossible
to change it from RC4 to MD5.
Can be an Access
Point placed as repeater between two floors without
connecting to a wired LAN?
No, our Access
Point does not support the repeater function.
Is it possible to
connect the Access Point directly to an ISDN or ADSL
line?
Yes, the Access
Point can connect to ISDN and ADSL by using a crossover
cable. For ADSL, you have to change the configuration
setting of the IP Filtering to disable so that it can
work with PPPoE protocol. As for ISDN, you may use the
default settings.
I have got a
number of Access Points, and I shall use them to get a
wireless connection from one building (the backbone) to
wired networks in 3 other buildings. In building 1
(backbone) I plan to use one Access Point configured to
bridge Point to MultiPoint with 2 antennas, one antenna
pointing to building 2, the other antenna pointing to
building 3 and 4. My question is - How shall I configure
the Access Point's in buildings 2, 3 and 4. I have the
choice between clients - bridge point to point with the
MAC address to the backbone Access Point- and bridge
Point to MultiPoint.
It is
impossible to configure the Access Point to one antenna
pointing to building 2 and the other antenna pointing to
building 3 and 4. In your case, all Access Points may
configure to bridge of Point to MultiPoint.
What is
the meaning of DTIM?
DTIM is
the Interval of the Access Point sending its broadcast
traffic. The unit measure of interval is beacon. The
default value is 2.
I would
like to replace the attached antennas of the Access
Point. I want to know how to get the little black
antennas off? I pulled, twisted, and turned, but it
could not remove move them at all. Is there a trick or
something, or can't they be removed at all? How do you
connect an extra antenna?
In
order to maintain the connectivity in good condition
between the antenna and the SX connector, we
intentionally design the mechanism to be tight enough so
that it can be hardly removed. The repeated separation
action may be harmful to the connectivity. That is the
reason we do not recommend end users to separate them
off too often.
However, if you intend to replace the attached
antenna, you can just pull them holding the connecter
round part only. Please do not hold the long stick when
you pull, which may damage it. In fact, the antennas are
originally pressed into the connectors by hand, without
any other accessory. Please try again.
When I
then close the SNMP manager, there is a Windows error
message saying that the SNMP manager caused an error in
KERNL32.DLL, and that I should restart the PC.
We
think your Windows system has some problems probably.
Reinstall Windows systems may solve this problem.
We have
an Access Point. On trying to run Access Point the error
"drivers not loaded" appears. We have tried re-loading
the software from disc but no joy. It did run once on a
different PC connected by USB. We are trying to connect
using Ethernet (100Mbit).
According to your description, we think
you may try to run APUtility without the driver properly
loaded. Please delete "other devices" in the Device
Manager if it exists, then follow the instruction
described in the Section 2.7 of User's Manual to install
the driver. After installing the driver, you are able to
use supplied APUtility to configure the Access Point
through an USB connection. However, you may use supplied
SNMP to configure the Access Point through an Ethernet
(10 Base-T) without its driver.
I don't
know how to resolve this problem - IPX in my network. I
have 8 Access Points and I configure one of them to
Access Point mode and others to Access Point Client
mode. I cannot make them work.
When
running IPX/SPX, you have to set the IP Filtering of AP
to disable. You may use APUtility to configure the
Identifier of IP Filtering to disable, or use SNMP to
click off the IP Routing in the menu of Setup ->
Bridge -> Filtering. In addition, if you configure
the Access Point to Access Point Client mode, no matter
what protocol you are using, any Station from the remote
LAN can successfully communicate with any Station of the
central LAN, as if all of them belonged to the same
physical LAN, but they cannot communicate with any
Station of another remote LAN. Please also note that
disable the IP Filtering may degrade the network
performance when you are running TCP/IP.
The
Access Point supports 128-bit Encryption. Does this mean
that all files that get transferred are safe from
hackers or not?
Speaking of the data security, the WEP
128-bit is reasonably strong. The security afforded by
the algorithm relies on the difficulty of discovering
the secret key through a brute-force attack. This in
turn is related to the length of the secret key and the
frequency of changing keys through a brute-force attack.
Our Access Points adopt RC4, which is a variable
key-size stream cipher with byte-oriented operations.
The algorithm is based on the use of a random
permutation. Analysis shows that the period of the
cipher is overwhelmingly likely to be greater than
10exp100. Eight to sixteen machine operations are
required per output byte, and the cipher can be expected
to run very quickly in software. Independent analysts
have scrutinized the algorithm and it is considered
secure.
I have
got two Access Points recently and tried to make them
work. I installed the utility software into my Windows
2000 and Windows XP computers and connected PCs to the
Access Point via a hub. Actually I have tried a direct
connection using a crossover cable, too. For some
reason, I just couldn't get the connection. I couldn't
find the Access Point from the SNMP Manager, and
couldn't even ping the default IP address of that Access
Point (suppose to be 192.168.1.100/255.255.254.0) from
my computer. What happen? I have to test and evaluate it
before the end of this week and see if we can use this
type of units for our customer. Your early response is
highly appreciated
First,
please verify the LED indicators by referring to the
Table 1 on the pager 4 of user's manual stored in the
supplied CD-ROM. Then, connect the Access Point to your
computer by an USB cable. Afterward you may try to
access the Access Point by using supplied utility
APUtility. SNMP can access to the Access Point on
condition that the IP of your computer and that of the
Access Point are in the same domain, i.e., the first 3
fields of IP. The Ping command applies the same rule.
Keep the hub only have these two connections to prevent
the connection to a DHCP server from affecting the IP
address of the Access Point.
What is
the function Access Point Client?
This
mode allows the connection of one or more remote LANs
with a central LAN, creating thus an extended single
virtual LAN. In this way, any Station from the remote
LAN can successfully communicate with any Station of the
central LAN, as if all of them belonged to the same
physical LAN. Wireless Stations can be associated with
the Access Point Clients. The Access Point conducts the
designated traffic to the appropriate wired or Wireless
Station. User needs to define the Preferred BSS that
corresponds to the MAC Address of the desired Access
Point.
