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D-Link AirPremier DWL-1800 User Manual

Wireless outdoor bridge
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D-Link AirPremier
DWL-1800
Wireless Outdoor Bridge
User's Manual
First Edition (July 2002)
Printed in Taiwan
RECYCLABLE
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Summary of Contents for D-Link AirPremier DWL-1800

  • Page 1 D-Link AirPremier DWL-1800 Wireless Outdoor Bridge User’s Manual First Edition (July 2002) Printed in Taiwan RECYCLABLE...

  • Page 2: Table Of Contents

    1. Introduction... 1 1.1 Using this Guide ...1 1.2 System Description ...1 1.2.1 General...1 1.2.2 D-Link AirPremier DWL-1800 DWL-1800 Functional Description ...2 1.2.2.1 DWL-1800 (BU) Wireless Base Unit...2 1.2.2.2 DWL-1800(RB) Wireless Bridge ...3 1.2.3 D-Link AirPremier DWL-1800 Compatibility and Standards ...3 2.
  • Page 3 5.6 Outdoor Unit-to-Indoor Unit Communication ...46 5.7 Interfaces...46 5.8 Electrical...47 5.9 Mechanical Dimensions ...48 5.10 Environmental...48 5.11 Standards Compliance, General...48 APPENDIX A. DWL-1800 FAQ ... 49 General...49 Collocation ...51 Performance ...52 Firmware...53 Configuration...54 Management...55 APPENDIX B. PREPARING THE INDOOR TO OUTDOOR CABLE... 56...
  • Page 4 Figure 6: Wall Mounting the Indoor Unit ...13 Figure 7: Indoor Unit Bottom Panel...13 Figure 8: Indoor Unit Top Panel...14 Figure 9: DWL-1800 Configuration Utility Main Window (Station Control Tab) ...21 Figure 10: The Set IP Dialog Box...22 Figure 11: Station Status Tab...24 Figure 12: IP Parameters Tab...25...
  • Page 5 TABLE OF TABLES Table 1: Indoor Unit LEDs ...16 Table 2: Outdoor Unit LEDs...17 Table 3: Regulatory Domains Specifications ...32 Table 4: Frequency List ... 321...

  • Page 6: Introduction

    1.1 Using this Guide This User's Manual provides instructions for planning and setting up a Wireless link based on the D-Link Air Premier DWL-1800 Series wireless base unit and remote bridge. Chapter 1: Introduction - Explains how to use this manual and presents the D-Link Air Premier DWL-1800 series.

  • Page 7: D-Link Airpremier Dwl-1800 Dwl-1800 Functional Description

    Data is transmitted at rates of up to 11 Mbps, providing network users with full 10BaseT Ethernet speeds. 1.2.2 D-Link AirPremier DWL-1800 Functional Description The D-Link Air Premier DWL-1800Series, DWL-1800B (BU) and DWL-1800R(RB), can be used as high-speed connections between two or more remote networks. Figure 1: DWL-1800 Point-to-Multipoint Application 1.2.2.1 DWL-1800B (BU) Wireless Base Unit...

  • Page 8: Dwl-1800(Rb) Wireless Bridge

    1.2.2.2 DWL-1800R (RB) Wireless Bridge The DWL-1800 Wireless Bridge connects a remote Ethernet network to a central network server or Internet site via a DWL-1800 Multipoint Base . The maximum number of MAC addresses that the unit can handle at any specific time is 1024 and the Aging algorithm is applied at all times.

  • Page 9: Installation

    2. INSTALLATION 2.1 Packing List Verify that all of the following items are included with the unit: Indoor unit. Outdoor unit (includes integrated antenna). Pole mounting kit for the Outdoor unit (includes two brackets and four sets of screws, nuts and washers). 110/220 VAC Power Cord.

  • Page 10: Outdoor Installation Considerations

    Figure 2: General Installation Scheme - Pole Mounting NOTE: Use a straight Ethernet cable to connect the indoor unit to a hub, or use a crossed cable to connect it directly to a PC’s Network Interface Card (NIC). 2.3 Outdoor Installation Considerations This chapter describes various considerations to take into account when planning an outdoor installation including site selection, antenna alignment, antenna polarization and cell size.

  • Page 11: Collocating Dwl-1800 Outdoor Units

    2.3.1 Collocating DWL-1800 Outdoor Units Up to three DWL-1800B units with integrated antennas (the exact number depends on the number of non-overlapping channels available in the relevant regulatory domain) can be collocated on the same building top or tower. Collocating more then three units may decrease performance depending upon the type of antenna and its direction.

  • Page 12: Rooftop Installation

    Rooftop installations offer several advantages: Fewer obstacles in the path. Improved performance due to greater height. 2.3.4 Antennas for Outdoor Applications D-Link AirPremier DWL-1800 series can be used in point-to-point or point-to-multipoint configurations. Point-to-Point The DWL-1800B/DWL-1800R is equipped with a directional antenna. The required antenna gain depends on the required range and performance.

  • Page 13: Antenna Polarization

    The system complies with EN 61000-4-5, test level 3 (2kV). Failure to do so may void the D-Link Air Premier DWL-1800 Product Warranty and may expose the end user to legal and financial liabilities.

  • Page 14: Compliance With Radio Regulations

    Violation of government regulations exposes the end user to legal and financial liabilities. D-Link , its resellers and distributors shall not be liable for expense or damage incurred as a result of installations that exceed local transmit power limitations.

  • Page 15: Figure 3: Holes/Grooves/Screw Holes

    Figure 3: Holes/Grooves/Screw Holes...

  • Page 16: Connecting The Ground And Antenna Cables

    Figure 4: 3” Pole Mounting Installation Using the Supplied Brackets NOTE: When inserting the open-ended screws, make sure to insert them with the grooves pointing outwards; these grooves are intended to allow fastening of the screws with a screwdriver. 2.4.1 Connecting the Ground and Antenna Cables The Ground terminal (marked 1.

  • Page 17: Installing The Indoor Unit

    3. Route a straight, uncrimped Ethernet cable (8-wire, 24 AWG) through both the top nut and the waterproof seal. NOTE: The 8-wire cable should be shielded. 4. Insert and crimp the RJ-45 connector. Refer to Appendix B for instructions on preparing the RJ-45 cable connector. 5.

  • Page 18: Figure 6: Wall Mounting The Indoor Unit

    Figure 6: Wall Mounting the Indoor Unit NOTE: The color codes of the power cable are: 4. After connecting the outdoor unit to the indoor unit using the Indoor-to-Outdoor cable, connect the power cord to the unit’s AC socket, located on the bottom panel shown in Figure 7. Connect the other end of the power cord to the AC mains after verifying that the unit is rated for the voltage in the country of use;...

  • Page 19: Configuring Parameters

    2.5.2 Antenna Alignment Usually, low gain antennas do not require alignment due to their very wide radiation pattern. High gain antennas, including the integral antenna of DWL-1800 units, have a narrow beamwidth necessitating an alignment procedure in order to optimize the link.
  • Page 20 2. Synchronize the units by aligning the antennas at the central and remote sites until maximum signal quality is obtained. Check the signal quality RSSI bar on the bottom panel of the DWL-1800R. The first LED lights red to indicate that the unit is working. The remaining nine LEDs light green to indicate the signal strength.

  • Page 21: Verifying Correct Operation

    2.6 Verifying Correct Operation 2.6.1 Verifying Correct Operation of the Indoor Unit To verify proper operation, check the LED indicators located on the top panel of the indoor unit as shown in Figure 8 on page 14, and as described in Table 1. Name Description POWER...

  • Page 22: Verifying Correct Operation Of The Outdoor Unit

    2.6.2 Verifying Correct Operation of the Outdoor Unit To verify proper operation, check the LED indicators located on the bottom panel of the outdoor unit. Name Description WLAN Wireless Link Indicator DC Power Self Test and Power indication Ethernet activity/ connectivity indication RSSI What to do if the Self Test fails...

  • Page 23: The Dwl-1800 Configuration Utility

    The system administrator can use the D-Link AirPremier DWL-1800 Configuration Utility to control a large number of DWL-1800 units from a single location. The Configuration Utility can be used to manage DWL-1800B(BU) and DWL-1800R (RB)units as well as other members of the D-Link wireless family including D-Link Air and Air Plus Series i.e.

  • Page 24: Installing And Running The Configuration Utility

    Programs. 3.2 Configuration Utility Modes There are several D-Link AirPremier DWL-1800 Configuration Utility modes of operation; these options are selected via the Mode menu in the configuration utility main window (shown below). The selected mode(s) is indicated by a check mark in the menu.

  • Page 25: Unit Configuration Mode

    In this section, you can: Discover the units that are connected to the network. View DWL-1800 units that have been discovered by their IP address. Select the units you wish to manage. Locate units behind a router that cannot be detected by the autodiscovery feature Assign unit IP addresses based on unit MAC addresses.

  • Page 26: The Control Window

    Control Window Figure 9: D-Link AirPremier DWL-1800 Configuration Utility Main Window (Station 3.2.1.1 The Control Window 3.2.1.1.1 Selecting Units You can select a unit to manage in one of the following ways: Click the Network Autodiscovery button. All the IP addresses of units in the same domain but not hidden behind a router (under the selected community) are displayed in the list box underneath the button.

  • Page 27: Figure 10: The Set Ip Dialog Box

    This feature can be used only if the D-Link AirPremier DWL-1800 Configuration Utility is on the same Ethernet segment as the unit and not behind the router.

  • Page 28: Application Control Buttons

    NOTE: In order to see the unit after assigning the IP address, the PC with the Configuration utility should be on the same IP subnet as the assigned IP address. Units receive auto IP address if there is no DHCP server and the unit is configured to work in the Smart mode as described in Section 3.2.1.3.2.

  • Page 29: Configuration Utility Tabs

    3.2.1.3 Configuration Utility Tabs 3.2.1.3.1 Station Status Tab The Station Status tab displays general information regarding the unit's firmware and hardware versions as well as general unit address information. System Name - The name of the selected unit. Location - A user-defined description of the location of the selected unit, up to 28 ASCII characters long (optional).

  • Page 30: Figure 12: Ip Parameters Tab

    IP Address - The IP address of the selected unit. Subnet mask - The Subnet mask of the selected unit. Default gateway - The default gateway of the selected unit. DHCP - Sets the way your system utilizes the Dynamic Host Configuration Protocol (DHCP, used for automatic IP assignment).

  • Page 31: Figure 13: Snmp Parameters Tab

    3.2.1.3.3 SNMP Parameters Tab The SNMP parameters tab allows you to define or edit the SNMP community strings and the SNMP-related parameters. Read - The read-only community string of the unit. Default is public. Read/Write - The read/write community string of the unit. Default is private.
  • Page 32 3.2.1.3.4 Counters Tab Figure 14: Counters Tab (BU/DWL-1800B Units) Figure 15: Counters Tab (RB/DWL-1800R Units) Using the Counters windows, you can view a wide range o f performance data at both sides of the link. For RB units, you can monitor the received signal strength through the RSSI (Received Signal Strength Indication) bar indicator at the bottom of the window.
  • Page 33 Additional performance counters displayed in this window include the following. To obtain a graph that displays the counter values, select a counter and drag it to the icon. Tx Counters Tx Fragments - The number of transmitted frames. The count includes data, control, management frames and the number of retransmissions of data frames (for example, if the same data frame is retransmitted ten times then the count will increase ten times).
  • Page 34 Tx Fail - The number of frames which the station failed to send. Resetting Counters You can reset the counters displayed in the Counters tab by clicking the Reset Counters button. All displayed values are reset to display zero. Note that this action does not reset the counters stored in the actual unit, but just resets the values displayed in the screen (an exception to this are the Link Counters).
  • Page 35 Figure 17: WLAN Parameters Tab (RB/DWL-1800R) Regulatory Domain - Displays the regulatory authorities in the relevant country of use (e.g., Canada, ETSI, FCC, Japan). Power - Displays the current output power level at the antenna port. ESSID - An ASCII string of up to 32 characters used to identify a WLAN that prevents the unintentional merging of two co-located WLANs.
  • Page 36 Range - The operative range of your WLAN or Wireless Link in the drop down list. This parameter affects the acknowledge delay time which needs to be increased in long links. The default value is up to 5 km. Channel - Channel selection varies, depending on the type of unit. For DWL-1800B units, select the channel that the unit will use by selecting a value (range: 1 -13, depending on your regulatory domain) from the Channel drop down menu.

  • Page 37: Table 3: Regulatory Domains Specifications

    France Canada Table 3: Regulatory Domains Specifications NOTE: The frequencies listed in the table are at the center of the channel. Each channel occupies 22MHz, therefore each channel occupies -11MHz to +11 MHz from the frequency specified. Channel Frequency 2412 MHz 2417 MHz 2422 MHz 2427 MHz...

  • Page 38: Figure 18: The Station Control Tab

    3.2.1.3.6 Station Control Tab Figure 18: The Station Control Tab Station Control - Click the Default button for all parameters to revert to the factory defaults. Reset Unit - Click the Reset button to reset the unit and apply any changes made to the system parameters.

  • Page 39: Figure 19: Security Tab

    Equivalent Privacy (WEP) is an authentication algorithm that protects authorized Wireless LAN users against eavesdropping and is implemented in D-Link AirPremier DWL-1800 units. WEP is defined in the IEEE 802.11b standard. This encryption is applicable for both authentication and data and the key length is 40 bits.

  • Page 40: Figure 20: Advanced Tab

    If you select the Shared Key algorithm, set the following parameters: Default Key ID – Sets the key for encryption. WEP Key – Defines the encryption keys used. Define each key by clicking the appropriate WEP Key row and entering ten hexadecimal characters (five sets of two characters each) for each of the four keys.
  • Page 41 Threshold value, an RTS is not sent and the data packet is transmitted directly to the WLAN. Short Retry Limit - The maximum number of transmission attempts for a frame that is shorter than or equal to the RTS Threshold. The default value is 8.

  • Page 42: Firmware Upgrade Mode

    3.2.1.3.9 Trap Monitor Tab Figure 21: Trap Monitor Tab When an event occurs, a trap is sent to the defined host address (the setting is made in the SNMP Parameters tab described in Section 3.2.1.3.3). This window displays the recorded traps. Click the Clear List button to clear the display area.

  • Page 43: Figure 22: Firmware Upgrade Mode Dialog Box

    Figure 22: Firmware Upgrade Mode dialog box NOTE: The Configuration utility does not resolve the topology of the cell. Therefore, firmware upgrades should be made from the central point where the BU/DWL-1800B are located. The list box on the left-hand side of the dialog box displays the managed units; it is sorted sequentially by DWL-1800B followed by DWL-1800R units.

  • Page 44: Figure 23: Firmware Upgrade Process

    indicating the progress of the operation. If both DWL-1800B and DWL-1800R devices are selected, the program will upgrade DWL-1800R units first. At the end of the upgrade session, the following window is displayed indicating that the operation was successful. Figure 23: Firmware Upgrade Process NOTE: Do not disconnect any cables or try to stop the process before downloading is completed.

  • Page 45: Advanced Tftp Settings

    3.2.2.1 Advanced TFTP Settings Figure 24: Advanced TFTP Setup dialog box The Advanced TFTP Setup window enables you to tune the TFTP session parameters for a more efficient firmware upgrade, depending on your actual deployment. Packet timeout - Defines the time (in seconds) it takes for a packet to timeout.

  • Page 46: Multiple Unit Configuration Mode

    3.2.3 Multiple Unit Configuration Mode This feature allows configuration parameters to be downloaded to multiple units simultaneously. When you select this option in the Options menu, all configuration windows become write-only. Irrelevant parameters are disabled. NOTE: The Configuration Utility does not resolve the topology of the cell. Therefore, multiple unit configuration operations should be done at the location where the DWL-1800B is are located.

  • Page 47: Resetting The Snmp Community Strings

    3.3 Resetting the SNMP Community Strings The SNMP Read/Write Community strings are an SNMP security feature to restrict management access to authorized persons only. Refer to Section 3.2.1.1.2 To reset the SNMP community strings, insert a paper clip or another suitable tool into the Reset button on the top panel of the unit while the unit is operating.

  • Page 48: System Troubleshooting

    4. SYSTEM TROUBLESHOOTING The following troubleshooting guide provides answers to some of the more common problems that may occur when installing and using the D-Link Air Premier DWL-1800. If problems not mentioned in this guide should arise, checking the Ethernet and WLAN counters may help (see Section 3.2.1.3.4). If the problem persists, please feel free to contact your local distributor or the D-Link Technical Support Department.
  • Page 49 Problem and Possible Cause Indication Failure to establish 1. Power supply to wireless link (“D” units may be faulty. models/external 2. Cables may be antennas) improperly connected 3. There may be some problem with antenna installation. Wireless link 1. Ethernet hub port or established, but UTP cable is faulty.

  • Page 50: Technical Specifications

    Radio Type Wireless LAN Standards Selectable sub Channels SNMP based Configuration Utility Integrated into the configuration utility MIB II, Bridge MIB, DWL-1800 Private MIBs Simultaneous multiple units software upgrade using the configuration utility TFTP download Indoor Interface Outdoor Unit Unit...

  • Page 51: Range

    Output Power (at the antenna port) Sensitivity (BER 10E-6) Processing Gain Integrated Antenna Type 5.4 Range Europe/ ETSI (20 dBm EIRP) US FCC 5.5 Security Authentication and Data 5.6 Outdoor Unit-to-Indoor Unit Communication Cable Type Maximum Cable length between units 5.7 Interfaces RF (antenna) connector in the outdoor unit...

  • Page 52: Electrical

    Baseband (indoor-to-outdoor units) Ethernet 5.8 Electrical Power Consumption Outdoor units: Shielded RJ-45 with special water proof sealed cap Indoor units: Shielded RJ-45 Indoor units: 10BaseT, (RJ-45) with 2 embedded LEDs 110 /220 V 500 /250 mA...

  • Page 53: Mechanical Dimensions

    5.9 Mechanical Dimensions Outdoor Unit Indoor Unit 5.10 Environmental Operating Temperature Operating Humidity 5.11 Standards Compliance, General Safety Environmental Radio 30 x 30 x 7.2 cm 12 x 4.7 x 2 in 15.4 x 8.4 x 5.6 cm 6.1 x 3.3 x 2.2 in Indoor unit: 0 C to 40 C Outdoor unit: -40 C to 55 C 5% to 95% non-condensing.

  • Page 54: Appendix A. Dwl-1800 Faq

    General Can the DWL-1800R indoor unit be placed outdoors? It is not recommended. The DWL-1800 indoor units are specified to operate between 0 C and 40 C and is not weather proof so it is best to mount the DWL-1800R indoors or in a protective cabinet.
  • Page 55 If the traffic load is more uni-directional, then the PER will be less. What is the best value for the CW min parameter on the DWL-1800? Setting the CW min parameter to 31 for heavy bi-directional traffic loads will minimize the PER.

  • Page 56: Collocation

    The degree of performance loss depends on network utilization. For example, the higher the utilization of the Frequency Hopping network, the higher the level of impact on the Direct Sequence (DWL-1800) network, and vice versa. Typically, in light to moderately utilized networks, the performance loss is not significant.

  • Page 57: Performance

    5%. What if the D-Link Air Premier DWL-1800 link experiences interference? If interference is affecting the DWL-1800 link, one of the other channels may be selected to operate away from the frequency of the interference. Also, physically re-locating the antennas may help.

  • Page 58: Firmware

    Yes, an earlier version of firmware can overwrite a newer version. Can the previous version of firmware be kept? The previous version of firmware cannot be kept on the DWL-1800 itself, but can be stored on your PC and loaded if needed.

  • Page 59: Configuration

    There are two ways. One way is to use the Default button on the Station Control Tab in the DWL-1800 Configuration Utility. The other is to press and hold the reset button on the back of the unit while powering on the unit. Remember that all...

  • Page 60: Management

    The DWL-1800/DWL-1800D comes with a graphical Configuration Utility that operates on any Windows based network ready PC. With this utility you can configure and monitor every DWL-1800 on your network. You can also use the DWL-1800 SNMP MIB on standard management platforms like SNMPc, and HP Openview.

  • Page 61: Appendix B. Preparing The Indoor To Outdoor Cable

    APPENDIX B. PREPARING THE INDOOR TO OUTDOOR CABLE The Indoor-to-Outdoor cable provides pin-to-pin connection on both sides. It is supplied open-ended at both sides, to allow the installer to conveniently route the cable into the waterproof seal off the Outdoor unit and through holes in walls. Figure 26 shows the wire pair connections required for the Indoor-to-Outdoor cable.

  • Page 62: Appendix C. Radio Signal Propagation

    APPENDIX C. RADIO SIGNAL PROPAGATION Introduction This section explains and simplifies many of the terms relating to antennas and RF (Radio Frequency) used when dealing with an RF installation system. The following diagram depicts a typical radio system: Figure 27: A Typical Radio System A radio system transmits information to the transmitter.

  • Page 63: Figure 28: Attenuation Of An Rf Signal

    RF Power Level RF power level at either the transmitter output or the receiver input is expressed in Watts. It can also be expressed in dBm. The relation between dBm and Watts can be expressed as follows: = 10 x Log P For example: 1 Watt = 1000 mW;...
  • Page 64 Free Space Loss Attenuation of the electromagnetic wave while propagating through space. This attenuation is calculated using the following formula: ) + 20xLog(R Free space loss = 32.4 + 20xLog(F F is the RF frequency expressed in MHz. R is the distance between the transmitting and receiving antennas (expressed in Km).

  • Page 65: Figure 29: Radiation Pattern Of Directional Antenna

    Antenna Characteristics Isotropic Antenna A hypothetical antenna having equal radiation intensity in all directions. Used as a zero dB gain reference in directivity calculation (gain). Antenna Gain A measure of directivity. It is defined as the ratio of the radiation intensity in a given direction to the radiation intensity that would be obtained if the power accepted by the antenna was radiated equally in all directions (isotropically).
  • Page 66 System Characteristics Receiver Sensitivity The minimum RF signal power level required at the input of a receiver for certain performance (e.g. BER). EIRP (Effective Isotropic Radiated Power) The antenna transmitted power. Equal to the transmitted output power minus cable loss plus the transmitting antenna gain. - Output power transmitted in dBm Ct - Transmitter cable attenuation in dB Gt - Transmitting antenna gain in dBi...

  • Page 67: Figure 30: Multipath Reception

    Link Budget Calculation EIRP = P - Ct + Gt = 16 dBm Pl = 32.4 + 20xLog(FMHz) + 20xLog(RKm) Si = EIRP - Pl + Gr - Cr = -82 dBm In conclusion, the received signal power is above the sensitivity threshold, so the link should work.

  • Page 68: Figure 31: Fresnel Zone

    Interference Interference may be caused by another system on the same frequency range, external noise, or some other co-located system. The Line of Sight Concept An optical line of sight exists if an imaginary straight line can be drawn connecting the antennas on either side of the link.

  • Page 69: Figure 32: Fresnel Zone Clear Of Obstacles

    Figure 32: Fresnel Zone Clear of Obstacles When at least 80% of the first Fresnel Zone is clear of obstacles, propagation loss is equivalent to that of free space.
  • Page 70 FCC Warning This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
  • Page 71 Only the 2446.5-2483.5MHz band is authorized for RLAN with products with a limited power to 100mW. This band concerns the channels 10, 11, 12 and 13. Using and installing D-Link Wireless solutions for RLAN, you commit to respect this regulation et to use only these four channels.

  • Page 72: Limited Warranty

    Spare parts and spare kits D-Link’s sole obligation shall be to repair or replace the defective Hardware at no charge to the original owner. Such repair or replacement will be rendered by D-Link at an Authorized D-Link Service Office. The replacement Hardware need not be new or of an identical make, model or part;...
  • Page 73 RMA number must be prominently marked on the outside of the package. The packaged product shall be insured and shipped to D-Link, 53 Discovery Drive, Irvine CA 92618, with all shipping costs prepaid.

  • Page 74: Copyright Statement

    No part of this publication may be reproduced in any form or by any means or used to make any derivative such as translation, transformation, or adaptation wi thout permission from D-Link Corporation/D-Link Systems Inc., as stipulated by the United...
  • Page 75 Le Florilege #2, Allee de la Fresnerie, 78330 Fontenay le Fleury France TEL: 33-1-302-38688 FAX: 33-1-3023-8689 E-MAIL: info@dlink-france.fr GERMANY D-LINK Central Europe/D-Link Deutschland GmbH Schwalbacher Strasse 74, D-65760 Eschborn, Germany TEL: 49-6196-77990 FAX: 49-6196-7799300 INFO LINE: 00800-7250-0000 (toll free) HELP LINE: 00800-7250-4000 (toll free) REPAIR LINE: 00800-7250-8000 info@dlink.de...

  • Page 76: Registration Card

    3. What network protocol(s) does your organization use ? ?XNS/IPX ?TCP/IP ?DECnet ?Others_____________________________ 4. What network operating system(s) does your organization use ? ?D-Link LANsmart ?Novell NetWare ?NetWare Lite ?SCO Unix/Xenix ?PC NFS ?3Com 3+Open ?Banyan Vines ?DECnet Pathwork ?Windows NT ?Windows NTAS ?Windows '95 ?Others__________________________________________ 5.

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