Mitsumi Electric Co DWLA001 Wireless LAN Desktop Unit User Manual WVUM10E

Mitsumi Electric Co Ltd Wireless LAN Desktop Unit WVUM10E

manual Part IV

Mitsumi Electric Co., Ltd. Wavit11 User's Manual 87/108 CONFIDENTIAL 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.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 88/108 CONFIDENTIAL 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 wheremultiple Access Points exist. If the wireless LAN under communication with a certain Access Point moves and failsin 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
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 89/108 CONFIDENTIAL 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 LANscommunicate 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.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 90/108 CONFIDENTIAL 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 bemodified.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 91/108 CONFIDENTIAL 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 nodedisturbance 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 thresholddepends on the placement and application of wireless LAN.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 92/108 CONFIDENTIAL 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.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 93/108 CONFIDENTIAL 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.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 94/108 CONFIDENTIAL 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.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 95/108 CONFIDENTIAL 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.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 96/108 CONFIDENTIAL 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.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 97/108 CONFIDENTIAL 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.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 98/108 CONFIDENTIAL 10.15. Basic Rate Set The sending speed of broadcast and multicast frame can be set.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 99/108 CONFIDENTIAL 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.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 100/108 CONFIDENTIAL 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.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 101/108 CONFIDENTIAL 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.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 102/108 CONFIDENTIAL 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
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 103/108 CONFIDENTIAL 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 Product Model# Firmware Version Driver Version 3Com 3ComAirConnect Wireless LAN PC Card 3CRWE737A V2.20-01 2.2.5.10 Apple AirMac Card M7600J/B 1.3.1 Cisco Cisco Aironet 340 Series Wireless PC Card AIR-PCM -342 4.23 6.64 COMPAQ WL-100 Wireless LAN PC Card WL-100 00.08.00.00 0.29.4 Corega corega Wireless LAN PCC11 CG-WLPCC11 0.29.4 Corega corega Wireless LAN PCCA11 CG-WLPCCA11 0.29.4 Elecom Laneed Wireless PC Card LD-W11/PCC 0.7.5 1.0.4 Linksys Instant Wireless Network PC Card WPC11 00.08.00.00 0.29.10a Lucent ORINOCO PC Card Gold PC24E-H-FC 4.04/6.16 6.28 Melco AirStation Wireless LAN Card WLI-PCM-L11 1.21 Melco AirStation Wireless LAN Card WLI-PCM-L11G 1.21 Melco AirStation Wireless LAN Card WLI-PCM-S11 1.01.00.0 NEC WarpStar Aterm WL11C PC-WL/11C 1.0.0.0 NTT-ME MN128 SS-LAN CARD11 WLC010-D53 00.07.05.00 0.29.4 Samsung SWL-2000N 11Mbps Wireless LAN PC Card SWL-2000N 0.75 3.65 Symbol Spectrum24 PC Card 11Mbps LA4121-1020 V2.20.01 2.2.5.10 Table 1.2 Test results Results AdHoc 802.11AdHoc(IBSS) Infrastructure Vendor Model # WEP Disable WEP 40bit WEP 128bit WEP Disable WEP 40bit WEP 128bit WEP Disable WEP 40bit WEP 128bit 3Com 3CRWE737A OK OK OK OK OK OK OK OK OK Apple - - - OK - - OK - - Cisco AIR-PCM -342 - - - OK OK OK OK OK OK COMPAQ WL-100 OK OK OK OK OK OK OK OK OK Corega CG-WLPCC11 OK OK - - - - OK OK - Corega CG-WLPCCA11 OK OK - - - - OK OK - Elecom LD-W11/PCC OK OK - - - - OK OK - Linksys WPC11 OK OK OK OK OK OK OK OK OK Lucent PC24E-H-FC - - - OK NG(2) NG(2) OK OK OK Melco WLI-PCM-L11 OK(1) OK(1) - - - - OK(1) OK(1) - Melco WLI-PCM-L11G OK OK OK - - - OK OK OK Melco WLI-PCM-S11 OK OK - - - - OK OK - NEC PC-WL/11C NG NG - - - - OK OK - NTT-ME WLC010-D53 OK OK OK OK OK OK OK OK OK
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 104/108 CONFIDENTIAL Samsung SWL-2000N OK OK OK(1) - - - OK OK OK(1) Symbol LA4121-1020 OK 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 Product Model # Firmware Version 3Com 3ComAirConnect Wireless LAN Access Point 3CRWE747A 01.50.10 Apple AirMac Base Station M7601J/B Cisco Cisco Aironet 340 Series Access Point AIR-AP342E2C 4.25.08 COMPAQ WL-400 Wireless LAN Hardware Access Point WL-400 2.5.3 corega corega Wireless LAN AP-11 CG-WLAP11 4.5.5G Elecom Laneed Airhawk LD-W11/AP 2.0.0 IO-DATA Wireless LAN Access Point WN-B11/AXP 3.0.39 Lucent ORINOCO WavePOINT2 Access Point WavePOINT2 3.71 Melco AirStation Access Point WLA-T1-L11 WLA-T1-L11 v100 Melco AirStation Access Point WLA-L11 WLA-L11 6.08 Melco AirStation Access Point WLA-L11G WLA-L11G 6.08 NEC WarpStar Aterm WL50T PC-WL50T1 NTT-ME MN128 SOHO SLOT IN AirPack11 1.70 Symbol Spectrum24 Access Point 11Mbps AP4121-1050 02.20.04 YAMAHA Net Volante RT60w RT60w 5.0010 Table 2.2 Test Results Results Vendor Modem # WEP Disable WEP 40bit WEP 128bit 3Com 3CRWE747A OK OK - Apple OK - - Cisco AIR-AP342E2C OK OK OK COMPAQ WL-400 OK OK OK corega CG-WLAP11 OK OK OK Elecom LD-W11/AP OK OK - IO-DATA WN-B11/AXP OK OK - Lucent OK OK OK Melco WLA-T1-L11 OK - - Melco WLA-L11 OK OK - Melco WLA-L11G OK OK - NEC PC-WL50T1 OK OK - NTT-ME AirPack11 OK OK(1) OK(1) Symbol AP4121-1050 OK OK - YAMAHA RT60w OK OK -
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 105/108 CONFIDENTIAL 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 Wavit11 setting Wireless LAN setting Access Point setting Ad-Hoc Channel Channel 802.11Ad-Hoc SS ID SS ID Infrastructure SS ID SS ID (ESS ID) Both SS ID Channel SSID Channel SS ID (ESS ID) Channel AP SS ID SS ID (ESS ID) Wireless Bridge
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 106/108 CONFIDENTIAL 12. Troubleshooting Situations Verifying Measures Does Power LED light up? 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. It does not work Are the configuration settings appropriate to meet the condition of the target Wavit11? By using configuration tool, check configuration. Is the channel settings appropriately? In Ad-Hoc mode, the same should be set. Open the configuration tool, and confirm channel settings. It does not communicate in Ad-Hoc mode. Are the encryption keys appropriately set? You need to set the same 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. It does not communicate in 802.11 Ad-Hoc mode. Are the encryption keys appropriately set? You need to set the same 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. It does not communicate in Infrastructure mode. Are the encryption keys appropriately set? You need to set the same 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. It does not communicate in Both mode. Are the encryption keys appropriately set? You need to set the same encryption keys. Open the configuration tool, and write in encryption keys again. It does not communicate in Access Point mode. Does the SSID fit to the client SSID? You need to set the same SSID with that of the client. Open the configuration tool, and confirm the SSID.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 107/108 CONFIDENTIAL Are the encryption keys appropriately set? 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 set? You need to set the target MAC address correctly. Open the configuration tool, and confirm the MAC address. It does not communicate in Wireless Bridge mode. Are the encryption keys appropriately set? You need to set the same encryption keys. Open the configuration tool, and write in encryption keys again. Was the network configuration of Personal computer set properly? Refer to Operating System User’s Manual. Does it communicate properly when personal computers are connected to each other with 10BASE-T cross cable? Refer to the Operating System User’s manual and configure the networks. It does not communicate in all modes. Can Wavit11s make communication when they are installed in the neighborhood? The distance is too far. Change the Wavit11 position to enable the communication. The configuration tool does not start. What is your operating system? For configuration tool, you need Windows95+IE4.01 or above. Can you find Wavit11s on the screen in the top window of configuration tool? Connect personal computer and Wavit11 using 10BASE-T straight cable. Is the TCP/IP protocol installed to your personal computer? Refer to User’s manual of the personal computer to install the TCP/IP protocol to your personal computer. Setting is not feasible with the configuration tool. Is the network address of Wavit11 IP address the same with that of the personal computer? Open the configuration tool, and change the IP address so as to match the network address. Was the unusable IP address set? Open the configuration tool and perform initialization. After initialization, you need to set up all configurations again. I have forgotten the password. Open the configuration tool and perform the initialization. After initialization, you need to set up all configurations again.
Mitsumi Electric Co., Ltd. Wavit11 User's Manual 108/108 CONFIDENTIAL 13. Specifications Item Specification Frequency 2,400 -2,483.5MHz Channel 11 Modulation CCK (Complementary Code Keying) Interface 10BASE-T Data Rate 11Mbps/5.5Mbps/2Mbps/1Mbps Receive Sensitivity -83dBm(11Mbps, FER=8x10-2) Output Power 15dBm Temperature Range 0-40 Celsius Standards ARIB STD-T66 IEEE 802.11b Supply Voltage 5.0V Consumption Current TX: 600mA RX: 330mA Size 65(W) x88(D) x 29.9(H) mm, Antenna is excluded Weight 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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