Mitsumi Electric Co DWLA001 Wireless LAN Desktop Unit User Manual WVUM10E

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Document Description	manual Part IV
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Date Submitted	2002-06-15 00:00:00
Date Available	2002-06-13 00:00:00
Creation Date	2002-06-14 23:13:13
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Document Title	WVUM10E.PDF
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Document Author:	Administrator

Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.4. Data Rate
There are 5 choices: 1Mbps, 2Mbps, 5.5Mbps, 11Mbps and the automatic
setting.
When the automatic setting is selected, Wavit11
makes communication in the fastest possible rate, and
this depends on the equipment at the other end. If the
communication environment is degraded and making
communication in the present data rate becomes
impractical, the data rate will be lowered and the
wireless LAN communication will continue.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.5. Roaming
This is a way to set whether the Wavit11does a roaming or not.
What is Roaming?
This function can be activated in an environment where
multiple Access Points exist. If the wireless LAN under
communication with a certain Access Point moves and fails
in receiving the radio wave, the roaming function will enable
Wavit11 to change the destination to the other nearby Access
Point. If Wavit11 switches the Access Point successfully, it
can send and receive the wireless LAN data without
interruption, and that it can access the network without any
interruption.
Setting up of Roaming function will be possible only if the
operational mode is as follows:
Infrastructure mode
AP mode
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.6. Hidden Node Compensation
Depended on the placement of multiple wireless LANs, there is a case that the
wireless LAN communication disturbance caused by other wireless LANs takes
place and the data rate may be fallen off. If the Hidden Node Compensation is
set to Enable, the Wavit11 seizes the wireless LAN communication line prior to
the actual data transmission, so it can mitigate the mutual disturbance of
wireless LAN communication and the degradation of data rate.
What is Hidden Node?
In the wireless LAN system, many wireless LANs
communicate each other on the same frequency. Normally every
wireless LAN senses whether or not another wireless LAN has
already started the wireless LAN communication so as not to
disturb the already started wireless LAN communication.
However, some wireless LANs disturb the already started
wireless LAN communication transmitting the data without
sensing the existence of another wireless LAN communication.
Such a kind of wireless LAN that may disturb the other wireless
LAN communication is called Hidden Node.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.7. Details
Click the “Details” button to enable the Wavit11 detailed setting.
Normally you do not need to change these items.
Check each item of this manual, when the setting should be
modified.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.8. RTS Threshold
In the case that the Hidden node compensation is set to Enable, setup of RTS
threshold will be possible.
The Wavit11 seizes the wireless LAN communication line prior to actual data
transmission if the data length is greater than RTS Threshold. When the Hidden
node compensation is set to Enable, the initial value is 0, therefore, the Wavit11
seizes the wireless LAN communication line prior to every length of actual data
transmission.
The wireless LAN performance will improve when this
RTS Threshold is enlarged, in the case that Hidden node
disturbance is not so violent. Check the performance by
modifying the RTS threshold, when you modify the value
from the initial value, because the optimal RTS threshold
depends on the placement and application of wireless LAN.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.9. Fragmentation Threshold
In the case that the transmitted data do not correctly reach the wireless LAN
on the partner side, the Wavit11 will retransmit the data predefined times. This
retransmission occurs frequently by a communication error under poor
communication condition and the performance of the wireless LAN network
sometimes deteriorates.
There is a way to mitigate the performance deterioration, that is the
retransmission of divided frame. Thus, the wireless LAN frame should be
divided into small pieces, and here is a way to set the size of divided frame.
All frames are sent without any data frame division in
default setting.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.10. Short Retry Limit
In the case that the transmitted data do not correctly reach the wireless LAN
on the partner side, the Wavit11 will retransmit the data predefined times and the
number of retransmission times is set here. In Short Retry Limit, the number of
retransmission is set, for the data frame whose length is below RTS threshold.
If a big value is set needlessly, the Wavit11 may try to
retransmit data many times to the wireless LAN at which the
radio wave cannot get, so the performance of the whole
wireless LAN can be deteriorated. Closely examine the degree
of performance required by the application, if you modify the
setting.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.11. Long Retry Limit
In the case that the transmitted data do not correctly reach the wireless LAN
on the partner side, the Wavit11 will retransmit the data predefined times and the
number of retransmission times is set here. In Long Retry Limit, the number of
retransmission is set, for the data frame whose length is above RTS threshold.
If a big value is set needlessly, the Wavit11 may try to
retransmit data many times to the wireless LAN at which the
radio wave cannot get, so the performance of the whole
wireless LAN can be deteriorated. Closely examine the
degree of performance required by the application, if you
modify the setting.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.12. Beacon Interval
The Wavit11 in AP mode periodically transmits special frame called Beacon
to information about current setting to another Wavit11 that tries to join the
wireless LAN network. Here, is a way to set the Beacon interval.
This item can be set only if the operational mode is AP
mode.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.13. SSID transmission
This is a description to set SSID transmission. It is possible to select whether
SS ID should be included in Beacon frame transmitted by Wavit11 in AP mode.
This item can be set only if the operational mode is AP
mode.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.14. Authentication Algorithm
The algorithm that is used for the Authentication between Wavit11 is selected.
There are 2 kinds of Authentication Algorithm, Open System and Shared Key,
and the checking of the encryption key is carried out mutually in Shared Key.
You can set this item in the following operational mode.
Infrastructure mode
AP mode
Both mode
802.11 Ad-Hoc mode
You cannot set this item if the encryption mode is set to
Disable.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.15. Basic Rate Set
The sending speed of broadcast and multicast frame can be set.
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Wavit11 User's Manual
10.16. Encryption mode
The Encryption mode used for the wireless LAN communication between
Wavit11 is selected.
It is not possible to make communication between Wavit11
with different encryption mode.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.17. Encryption Key
It is the Encryption key for the encryption of data transmission. Set the same
encryption key to each Wavit11.
There are two ways to set encryption key:
You set some string and the Wavit11 automatically generate
encryption key from string.
You set the encryption key directly.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.18. Default Key
This is one of the encryption keys Wavit11 use for data transmission.
You can set this item if the Encryption Mode is either
“Original” or “40bit WEP”.
When the different Default Key is set to each Wavit11, the
security against the illegal wiretapping is strengthened.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
10.19. Destination Address
Set the MAC address of the Wavit11 on the other side for Wireless Bridge
operation. The MAC address is indicated at the label put at the back of the
Wavit11.
Make sure to satisfy the following condition to set the MAC
address correctly for the successful Wireless Bridge
operation:
- Wavit11 should be in Wireless Bridge mode
- Channel should be the same
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
11. Interoperability with third vendor wireless LAN
Wavit11 has interoperability with third vendor wireless LAN under certain
conditions. If you install intermixed wireless network of third vendor Wireless
LAN and Wavit11, refer to User’s Manual enclosed in the package of third
vendor wireless LAN. However, Mitsumi does not guarantee that Wavit11 can
communicate with non-Wavit11 wireless LAN.
11.1. Confirmed wireless LAN card
Table 1.1 Wireless LAN Card information
Vendor
3Com
Apple
Cisco
COMPAQ
Corega
Corega
Elecom
Linksys
Lucent
Melco
Melco
Melco
NEC
NTT-M E
Samsung
Symbol
Product
Firmware
Version
V2.20-01
1.3.1
4.23
00.08.00.00
Model#
3ComAirConnect Wireless LAN PC Card
AirMac Card
Cisco Aironet 340 Series Wireless PC Card
WL-100 Wireless LAN PC Card
corega Wireless LAN PCC11
corega Wireless LAN PCCA11
Laneed Wireless PC Card
Instant Wireless Network PC Card
ORINOCO PC Card Gold
AirStation Wireless LAN Card
AirStation Wireless LAN Card
AirStation Wireless LAN Card
WarpStar Aterm WL11C
MN128 SS-LAN CARD11
SWL-2000N 11Mbps Wireless LAN PC Card
Spectrum24 PC Card 11Mbps
3CRWE737A
M7600J/B
AIR-PCM -342
WL-100
CG-WLPCC11
CG-WLPCCA11
LD-W11/PCC
WPC11
PC24E-H-FC
WLI-PCM -L11
WLI-PCM -L11G
WLI-PCM -S11
PC-WL/11C
WLC010-D53
SWL-2000N
LA4121-1020
Driver Version
2.2.5.10
6.64
0.29.4
0.29.4
0.29.4
1.0.4
0.29.10a
6.28
1.21
1.21
1.01.00.0
1.0.0.0
0.29.4
3.65
2.2.5.10
0.7.5
00.08.00.00
4.04/6.16
00.07.05.00
0.75
V2.20.01
Table 1.2 Test results
Vendor
3Com
Apple
Cisco
COMPA
Corega
Corega
Elecom
Linksys
Lucent
Melco
Melco
Melco
NEC
NTT-M E
Model #
Results
802.11AdHoc(IBSS)
AdHoc
Infrastructure
WEP
Disable
WEP
40bit
WEP
128bit
WEP
Disable
WEP
40bit
WEP
128bit
WEP
Disable
WEP
40bit
WEP
128bit
AIR-PCM -342
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
WL-100
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK(1)
OK
OK
NG
OK
OK
OK
OK
OK
OK(1)
OK
OK
NG
OK
OK
OK
OK
OK
OK
OK
OK
NG(2)
OK
OK
NG(2)
OK
OK
OK
OK
OK
OK
OK(1)
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK(1)
OK
OK
OK
OK
OK
OK
OK
OK
3CRWE737A
CG-WLPCC11
CG-WLPCCA11
LD-W11/PCC
WPC11
PC24E-H-FC
WLI-PCM -L11
WLI-PCM -L11G
WLI-PCM -S11
PC-WL/11C
WLC010-D53
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Mitsumi Electric Co., Ltd.
Samsung
Symbol
SWL-2000N
LA4121-1020
OK
OK
Wavit11 User's Manual
OK
OK
OK(1)
OK
OK
OK
OK
OK
OK
OK
OK
(1) This product does not receive fragmented frame.
(2) This product does not support hexagonal encryption key setting.
11.2. Confirmed Access Point
Table 2.1 Wireless LAN Access Point Information
Vendor
3Com
Apple
Cisco
COMPAQ
corega
Elecom
IO-DATA
Lucent
Melco
Melco
Melco
NEC
NTT-M E
Symbol
YAMAHA
Product
3ComAirConnect Wireless LAN Access Point
AirMac Base Station
Cisco Aironet 340 Series Access Point
WL-400 Wireless LAN Hardware Access
Point
corega Wireless LAN AP-11
Laneed Airhawk
Wireless LAN Access Point
ORINOCO WavePOINT2 Access Point
AirStation Access Point WLA-T1-L11
AirStation Access Point WLA-L11
AirStation Access Point WLA-L11G
WarpStar Aterm WL50T
MN128 SOHO SLOT IN AirPack11
Spectrum24 Access Point 11Mbps
Net Volante RT60w
Model #
3CRWE747A
M7601J/B
AIR-AP342E2C
WL-400
CG-WLAP11
LD-W11/AP
WN-B11/AXP
WavePOINT2
WLA-T1-L11
WLA-L11
WLA-L11G
PC-WL50T1
AP4121-1050
RT60w
Table 2.2 Test Results
Vendor
3Com
Apple
Cisco
COMPAQ
corega
Elecom
IO-DATA
Lucent
Melco
Melco
Melco
NEC
NTT-M E
Symbol
YAMAHA
Modem #
3CRWE747A
AIR-AP342E2C
WL-400
CG-WLAP11
LD-W11/AP
WN-B11/AXP
WLA-T1-L11
WLA-L11
WLA-L11G
PC-WL50T1
AirPack11
AP4121-1050
RT60w
WEP
Disable
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
Results
WEP
40bit
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK(1)
OK
OK
WEP
128bit
OK
OK
OK
OK
OK(1)
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Firmware Version
01.50.10
4.25.08
2.5.3
4.5.5G
2.0.0
3.0.39
3.71
v100
6.08
6.08
1.70
02.20.04
5.0010
OK(1)
OK
Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
11.3. Setting
The general setup method to connect with third vendor wireless LAN is as
follows, for each communication mode.
(Ad-Hoc mode)
In Ad-Hoc mode, set same channel to both Wavitr11 and third vendor
Wireless LAN.
(802.11 Ad-Hoc mode)
In 802.11 Ad-Hoc mode, set same SSID to both Wavit11 and third vendor
wireless LAN.
(Infrastructure mode)
In Infrastructure mode, set same SSID to both Wavit11 and third vendor
Access Point.
(AP mode)
In AP mode, set same SSID to Wavit11 and third vendor Wireless LAN.
(Wireless Bridge mode)
In Wireless Bridge mode connection to the third vendor wireless LAN is not
possible. You need to use two Wavit11s when you set up a wireless bridge.
Wavit11 mode
Ad-Hoc
802.11Ad-Hoc
Infrastructure
Both
AP
Wireless Bridge
Wavit11 setting
Channel
SS ID
SS ID
SS ID
Channel
SS ID
Wireless LAN
setting
Channel
SS ID
SSID
Channel
SS ID (ESS ID)
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Access Point setting
SS ID (ESS ID)
SS ID (ESS ID)
Channel
Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
12. Troubleshooting
Situations
It does not work
It does not communicate in
Ad-Hoc mode.
It does not communicate in
802.11 Ad-Hoc mode.
It does not communicate in
Infrastructure mode.
It does not communicate in
Both mode.
It does not communic ate in
Access Point mode.
Verifying
Does Power LED light up?
Measures
Connect AC Adapter to
Wavit11.
Connect AC Adapter to the
outlet.
Does LINK LED light up?
Connect 10BASE-T cable
properly. Check 10BASE-T
cable polarity.
Does TX/RX LED light up?
Install Wavit11 near the target
Wireless LAN, and confirm
the communication.
Are the configuration settings By using configuration tool,
appropriate
to
meet
the check configuration.
condition of the target Wavit11?
Is
the
channel
settings In Ad-Hoc mode, the same
appropriately?
should be set. Open the
configuration
tool,
and
confirm channel settings.
Are the encryption keys You need to set the same
appropriately set?
encryption keys. Open the
configuration tool, and write
in encryption keys again.
Is the appropriate SSID set?
You need to set the same SSID
with
that
of
other
Wavit11.Open
the
configuration
tool,
and
confirm the SSID.
Are the encryption keys You need to set the same
appropriately set?
encryption keys. Open the
configuration tool, and write
in encryption keys again
Is the appropriate SSID set?
You need to set the same SSID
with that of Access Point.
Open the configuration tool,
and confirm the SSID.
Are the encryption keys You need to set the same
appropriately set?
encryption keys. Open the
configuration tool, and write
in encryption keys again
Is the channel set appropriately? You need to set the same
channel in Both mode. Open
the configuration tool, and
confirm channel settings.
Are the encryption keys You need to set the same
appropriately set?
encryption keys. Open the
configuration tool, and write
in encryption keys again.
Does the SSID fit to the client You need to set the same SSID
SSID?
with that of the client.
Open the configuration tool,
and confirm the SSID.
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Wavit11 User's Manual
Are the encryption
appropriately set?
It does not communicate in
Wireless Bridge mode.
It does not communicate in all
modes.
The configuration tool does not
start.
Setting is not feasible with the
configuration tool.
Was the unusable IP address
set?
I have forgotten the password.
keys You need to set same
encryption keys. Open the
configuration tool, and write
in encryption keys again.
Is the channel set appropriately? In Wireless Bridge mode, you
need to set the same channel.
Open the configuration tool,
and confirm the channel.
Was the MAC address properly You need to set the target
set?
MAC address correctly. Open
the configuration tool, and
confirm the MAC address.
Are the encryption keys You need to set the same
appropriately set?
encryption keys. Open the
configuration tool, and write
in encryption keys again.
Was the network configuration Refer to Operating System
of Personal computer set User ’s Manual.
properly?
Does it communicate properly Refer to the Operating System
when personal computers are User ’s manual and configure
connected to each other with the networks.
10BASE-T cross cable?
Can
Wavit11s
make The distance is too far.
communication when they are Change the Wavit11 position
installed in the neighborhood?
to enable the communication.
What is your operating system? For configuration tool, you
need Windows95+IE4.01 or
above.
Can you find Wavit11s on the Connect personal computer
screen in the top window of and Wavit11 using 10BASE-T
configuration tool?
straight cable.
Is the TCP/IP protocol installed Refer to User’s manual of the
to your personal computer?
personal computer to install
the TCP/IP protocol to your
personal computer.
Is the network address of Open the configuration tool,
Wavit11 IP address the same and change the IP address so
with that of the personal as to match the network
computer?
address.
Open the configuration tool
and perform initialization.
After initialization, you need
to set up all configurations
again.
Open the configuration tool
and perform the initialization.
After initialization, you need
to set up all configurations
again.
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Mitsumi Electric Co., Ltd.
Wavit11 User's Manual
13. Specifications
Item
Frequency
Channel
Modulation
Interface
Data Rate
Receive Sensitivity
Output Power
Temperature Range
Standards
Supply Voltage
Consumption Current
Size
Weight
Specification
2,400 -2,483.5MHz
11
CCK (Complementary Code Keying)
10BASE-T
11Mbps/5.5Mbps/2Mbps/1Mbps
-83dBm(11Mbps, FER=8x10-2)
15dBm
0-40 Celsius
ARIB STD-T66
IEEE 802.11b
5.0V
TX: 600mA
RX: 330mA
65(W) x88(D) x 29.9(H) mm, Antenna is excluded
110g
Range
Data Rate
Indoor
Outdoor
11Mbps
30m
60m
5.5Mbps
40m
80m
2Mbps
50m
100m
1Mbps
60m
120m
These ranges are estimated from the general environment. For Wavit11
installation, refer to the above and confirm the communication.
Performance
The performance is measured on the application. The performance varies
according to PC power, network interface card power, installation environment,
wireless network traffic and external noise. On condition that setting is made in
the following environment: Ad-Hoc, Windows SE and TCP/IP protocol, the
highest performance of the Wavit11 will be given at around 5Mbps.
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Modify Date                     : 2002:06:14 23:13:28
Title                           : WVUM10E.PDF
Author                          : Administrator
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Producer                        : Acrobat PDFWriter 4.05 Windows NT
Create Date                     : 2002:06:14 23:13:13
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