Spectrum 24 AP-4111 DS, Product Reference Manual

Page 1: ...www symbol com Spectrum24 AP 4111DS Access Point Product Reference Guide 70 20688 01 Revision A November 1999 ...

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Page 3: ...n turn Press A B press the indicated keys simultaneously Hold A B press and hold the indicated keys while performing or waiting for another function Used in combination with another keystroke angles indicates mandatory parameters in syntax brackets for command line indicates available parameters in configuration files brackets act as separators for options GUI Screen text indicates the name of a c...

Page 4: ... following for certain conditions or information Indicates tips or special requirements Indicates conditions that can cause equipment damage or data loss Indicates a potentially dangerous condition or procedure that only Symbol trained personnel should attempt to correct or perform ...

Page 5: ...irect Sequence Spread Spectrum 17 1 3 6 MU Association Process 19 1 3 7 Mobile IP 20 1 3 8 Supporting CAM and PSP Stations 23 1 3 9 Data Encryption 24 1 3 10 HTTP HTML Web Server Support 25 1 3 11 Management Options 26 Chapter 2 Configuring the AP 29 2 1 Gaining Access to the UI 29 2 1 1 Using Telnet 29 2 1 2 Using a Direct Serial Connection 31 2 1 3 Using a Dial Up Connection 32 2 1 4 Using a Web...

Page 6: ...he SNMP Agent 57 2 8 Configuring the ACL 61 2 8 1 Range of MUs 61 2 8 2 Adding Allowed MUs 63 2 8 3 Removing Allowed MUs 63 2 8 4 Enable Disable the ACL 64 2 8 5 Removing All Allowed MUs 64 2 8 6 Load ACL from MU List 64 2 9 Configuring Address Filtering 65 2 9 1 Adding Disallowed MUs 66 2 9 2 Removing Disallowed MUs 66 2 10 Configuring Type Filtering 66 2 10 1 Adding Filter Types 66 2 10 2 Removi...

Page 7: ...85 3 3 Forwarding Counts 86 3 4 Mobile Units 87 3 5 Mobile IP 91 3 6 Known APs 92 3 7 Ethernet Statistics 93 3 8 Radio Statistics 95 3 9 Miscellaneous Statistics 98 3 9 1 Analyzing Frequency Use 100 3 9 2 Analyzing Retries 101 3 10 Event History 102 3 11 Clearing Statistics 103 Chapter 4 Hardware Installation 105 4 1 Precautions 105 4 2 Package Contents 105 4 3 Requirements 106 4 3 1 Network Conne...

Page 8: ...110 4 9 1 Ensure wired network is operating 110 4 10 Setting Up MUs 111 Appendix A Specifications A 1 A 1 Physical Characteristics A 1 A 2 Radio Characteristics A 2 A 3 Network Characteristics A 3 Appendix B Supported Modems B 1 Appendix C Customer Support C 1 Appendix D Regulatory Addendum D 1 Index Index 1 ...

Page 9: ...P is a Spectrum24 direct sequence DS product Spectrum24 DS products use direct sequence technology to provide a high capacity high data rate wireless network Spectrum24 DS infrastructure products include bridging architecture to provide communication between radio and wired multiple network segments a design based on the IEEE 802 11 standard an 11 Mbps data rate for fast operation seamless roaming...

Page 10: ...s PC Cards and PCI adapters bar code scanners third party devices and other devices The AP provides an 11 Mbps data transfer rate on the radio network It monitors Ethernet traffic and forwards appropriate Ethernet messages to MUs over the Spectrum24 network It also monitors MU radio traffic and forwards MU packets to the Ethernet LAN The AP meets the following the regulatory requirements for Europ...

Page 11: ...r and a country specific AC power cable PC AT Serial Port Interface support for up to 127 MUs data encryption increased MIB support SNMP support Mobile IP support DHCP support HTTP Web server support When properly configured an MU communicating with an AP appears on the network as a peer to other network devices The AP receives data from its wired interfaces and forwards the data to the proper int...

Page 12: ...The receiving device demodulates the signal by removing the carrier signal This demodulation results in the original digital data Spectrum24 uses the environment the air and certain objects as the transmission medium Spectrum24 radio devices transmit in the 2 4 to 2 5 GHz frequency range a license free range throughout most of the world The actual range is country dependent Spectrum24 devices like...

Page 13: ... Access Point Product Reference Guide 5 Select from the following topologies A single AP used without the wired network provides a single cell wireless network for peer to peer MUs A single AP can bridge the Ethernet and radio networks ...

Page 14: ...duct Reference Guide Multiple APs can coexist as separate individual networks at the same site without interference using different Net_IDs Multiple APs wired together provide a network with better coverage area and performance when using the same Net_IDs ...

Page 15: ... an environment making it an RF Network using the same Net_ID or Extended Service Set ESS APs with the same Net_ID ESS define a coverage area The MU searches for APs with a matching Net_ID ESS and synchronizes with an AP to establish communications This allows MUs within the coverage area to move about or roam As the MU roams from cell to cell it switches APs The switch occurs when the MU analyzes...

Page 16: ... lights microwave ovens refrigerators and other industrial equipment Signal loss can occur when metal concrete walls or floors block transmission Locate APs in open areas or add APs as needed to improve coverage Site Surveys A site survey analyzes the installation environment and provides users with recommendations for equipment and its placement The optimum placement of 11 Mbps access points diff...

Page 17: ...nation The AP tracks the frames sources and destinations to provide intelligent bridging as MUs roam or network topologies change The AP also handles broadcast and multicast message initiations and responds to MU association requests 1 3 1 MAC Layer Bridging The AP listens to all packets on all interfaces and builds an address database using the unique IEEE 48 bit address MAC address An address in...

Page 18: ...he Ethernet interface Transmitted ARP request packets echo back to other MUs The AP removes from its database destinations or interfaces not used for a specified time The AP refreshes its database when it transmits or receives data from these destinations and interfaces Filtering and Access Control The AP provides facilities to limit the MUs that associate with it and the data packets that can for...

Page 19: ...AP sends out a DHCP request searching for a DHCP server to acquire the network configuration and firmware filenames Because BOOTP and DHCP interoperate the one that responds first becomes the server that allocates information The DHCP client automatically sends a DHCP request every XX hours days to renew the IP address lease as long as the AP is running This parameter is programmed at the DHCP ser...

Page 20: ...en cells With the direct sequence system each cell operates independently Each cell provides an 11 Mbps bandwidth Adding cells to the network provides increased coverage area and total system capacity The AP supports MUs operating in Power Save Polling PSP mode or Continuously Aware Mode CAM without user intervention The DB 9 9 pin RS 232 serial port provides a UI User Interface or a PPP Point to ...

Page 21: ...perations Data link bridging between two APs A network using a data link bridge provides radio coverage by using a remote AP in a location geographically distant from the AP connected to the Ethernet network The remote AP cannot provide an Ethernet connection to other APs MUs associating with the remote AP transmit and receive from the Ethernet network via the PPP link PPP Link M odem PPP Link Ser...

Page 22: ...PPP link provides the option of using a direct serial link or modem to extend wired Ethernet topologies Once in PPP mode the AP automatically attempts to communicate with the other device using the Data Link Bridging DLB protocol An AP using DLB communicates on the MAC level and receives and transmits Ethernet frames If the other device does not support DLB the AP attempts to communicate using Int...

Page 23: ...net Communities The AP database dynamically tracks MUs and APs on the PPP interface Packets forward to the PPP link after the AP determines their destination The PPP implementation in the AP uses the NCP as described in RFC 1220 PPP Extensions for Bridging to encapsulate packets at the Ethernet level The PPP provides IP bridging control as defined by RFC 1172 and MAC level bridging It provides sup...

Page 24: ... modem devices requires straight through cables between the APs and modems Using modems requires a telephone line for as long as the link remains active When using a modem connection one AP represents the originating AP and the other represents the answering AP When using a PPP link do not use the serial port to access the UI Access to the UI requires establishing a Telnet session with the AP ...

Page 25: ...ach bit of transmitted data is mapped into chips by the access point and rearranged into a pseudorandom spreading code to form the chipping sequence The chipping sequence is combined with a transmitted data stream to produce the AP output signal In the United States the three non overlapping direct sequence channels are channels 1 6 and 11 Mobile Units receiving a direct sequence transmission use ...

Page 26: ...ce are corrupted by interference The ratio of chips per bit is called the spreading ratio A high spreading ratio increases the resistance of the signal to interference A low spreading ratio increases the bandwidth available to the user The access point uses two chips per bit among three channels within the 2 4 GHz band in a pattern avoiding any 1 or 2 Mbps systems operating in the same area The ac...

Page 27: ...ns at start up In a full scan an MU uses a sequential set of channels as the scan range For each channel in range the MU tests for CCA Clear Channel Assessment When a transmission free channel becomes available the MU broadcasts a probe with the Net_ID ESS and the broadcast BSS_ID An AP directed probe response generates an MU ACK Mobile Unit Acknowledgment and the addition of the AP to the AP tabl...

Page 28: ...ow a threshold An MU selects the best available AP and adjusts itself to the AP direct sequence channel to begin association Once associated the AP begins forwarding any frames it receives addressed to the MU Each frame contains fields for the current direct sequence channel The MU uses these fields to resynchronize to the AP 1 3 7 Mobile IP The Internet Protocol identifies the MU point of attachm...

Page 29: ...tunnels the message to the MU at its current location This happens as long as the MU keeps its home agent informed of its current location on some foreign link A Foreign Agent is an AP acting as a router at the MU location on a foreign link The foreign agent serves as the default router for packets sent out by the MU connected on the same foreign link A care of address is the IP address used by th...

Page 30: ...tion menu generates a 16 byte checksum authenticator using an MD5 algorithm The MU and AP share the checksum called a key to authenticate transmitted messages between them The AP and MU share the key while the MU is visiting a foreign subnet The MU and AP have to use the same key If not the AP refuses to become the Home Agent for the MU The maximum key length is 13 characters The AP allows all pri...

Page 31: ...ion The performance index determines how long the adapter stays in CAM after transmit or receive activity Regardless of the performance index used adapters switch to CAM for data reception transmission The awake interval in PSP performance index 1 is long enough to allow for round trip packet response times The packet response time in PSP performance index 5 is only 25 msec the adapter goes back t...

Page 32: ...a for scrambling the data A key is the specific code used by the algorithm to encrypt or decrypt the data Decryption is the decoding and unscrambling of received encrypted data The same device host computer or front end processor usually performs both encryption and decryption The data transmit or receive direction determines whether the encryption or decryption function is performed This device t...

Page 33: ... the native language of the Web The HTTP protocol makes requests from browsers the user to servers and responses from servers to browsers This function provides the user with a Web based format for configuration and firmware download Web pages are written in HTML Hypertext Markup Language HTML allows the user to create web pages containing text graphics and pointers or links to other web pages or ...

Page 34: ...ion about networks operating characteristics and changing router and gateway parameters The SNMP protocol consists of three elements management stations management information MIB a management protocol SNMP Nodes can perform as hosts routers bridges or other devices that can communicate status information An SNMP Agent is a node that runs the SNMP management process to systematically monitor and m...

Page 35: ...e 802 11 MIB and one Symbol proprietary Symbol MIB Management Information Base The SNMP agent supports read write read only or disabled modes The AP supports traps that return to the SNMP manager when certain events occur The Wireless LAN Installation and Utilities disk packaged with MUs contains the MIB Increased MIB Support The MIB Management Information Base has ten categories defining what the...

Page 36: ...mmunication program with ANSI emulation See 2 1 2 Using a Direct Serial Connection on page 31 Dial Up Access The dial up access method requires a communication program with ANSI emulation on the remote terminal or PC The terminal or PC dials to an AP with a modem connection The AP supports connection to a Hayes compatible 28 800 baud or faster modem See 2 1 3 Using a Dial Up Connection on page 32 ...

Page 37: ...erform this option only among the same hardware platforms and same firmware versions 2 1 Gaining Access to the UI The method for establishing access to the UI depends on the connection used Select the setup that best fits the network environment 2 1 1 Using Telnet Using a Telnet session to gain access to the UI requires that a remote station have a TCP IP stack The remote station can be on the wir...

Page 38: ...w Mobile Units Set RF Configuration Show Known APs Set Serial Port Configuration Show Ethernet Statistics Set Access Control List Show RF Statistics Set Address Filtering Show Misc Statistics Set Type Filtering Show Event History Set SNMP Configuration Enter Admin Mode Set Event Logging Configuration If the session is idle e g no input for the configured time the session terminates To manually ter...

Page 39: ...a configuration PC Connecting the AP directly to a PC with a 9 pin serial port requires a null modem cable with the following configuration The factory configured AP accepts a direct serial connection to the UI Configure the AP for the following Enable serial port Set Port Use to UI Disable modem connection Configure these settings in the Set Serial Port Configuration screen within the UI See 2 2 ...

Page 40: ...The AP displays the Main Menu 5 Exit the communication program to terminate the session 2 1 3 Using a Dial Up Connection The AP supports a dial up connection to the UI This requires accessing the UI from Telnet or a direct serial connection and changing the serial port configuration Configure the AP for the following Enable serial port Set serial port for UI Disable any modem connection Set AP to ...

Page 41: ...he UI Setup Network Web Server Help File Access A network Web server is required to access the Help file from the Spectrum24 Access Point Configuration Management System web pages This procedure applies to the Microsoft Internet Information Server The network Web server can be different if so some of the procedures differ This procedure is for Network or System Administration personnel only To cre...

Page 42: ...t Service Properties to display the WWW service properties for the server 9 The WWW Service Properties window opens 10 Select the Directories Tab 11 Select the Add button to open the Directories window 12 Type the Directory Folder path of the directory created in step one 13 Select the Virtual Directory button 14 Type a folder alias such as WebHelp and select OK 15 Select the Enable Default Docume...

Page 43: ...he AP for changes to take effect 1 Select the Special Functions screen 2 Select Reset AP 3 At the confirmation prompt select Yes To enable Help file access change the Help URL parameter 1 Select the Special Functions screen 2 Use the TAB or UP DOWN ARROW key to select the Alter Filename s HELP URL TFTP Server DHCP 3 Press ENTER 4 Use the TAB or DOWN ARROW key to select the HELP URL field 5 Type th...

Page 44: ...he system tells the user to reboot for property changes to take effect The workstation in this case is the workstation or laptop computer running the Web browser 2 To verify the connection ping the AP At the default DOS prompt type Ping t xxx xxx xxx xxx If the ping receives no response verify that the hardware connections IP address gateway address and subnet mask are correct If correct contact t...

Page 45: ... the contents are the same Access the different pages using the nodes located in the left frame Refer to the online help file for Web page navigation page contents and parameter use To view configuration function or option changes on the Web page s turn off the caching function for the browser being used For Netscape from the menu bar select Edit Properties and Advanced Cache Select Document in ca...

Page 46: ...ous view of the page without the changes To ensure the latest version of a web page is viewed set this option in the browser To access help from any Spectrum24 Access Point Configuration Management System web page select the Help button located in the top right hand corner of each page For access to the Easy Setup and Configuration pages this popup dialogue box appears 1 Type the AP name Symbol Ac...

Page 47: ...ntrol List Show RF Statistics Set Address Filtering Show Misc Statistics Set Type Filtering Show Event History Set SNMP Configuration Enter Admin Mode Set Event Logging Configuration The top line displays the System Name for the AP default is Symbol Access Point and the name of the configuration screen The UI uses the following keystrokes to navigate through the menus and screens depending on the ...

Page 48: ...id the AP beeps and restores the original value Press TAB to scroll to next menu item The bottom line on the menu enables menu screen changes to take effect Press TAB to scroll to the item and press ENTER to select When changing values such as System Name or System Password accept values by scrolling to the next field or pressing ENTER Some screens use function keys to initiate commands For exampl...

Page 49: ...ministration password Enter System Password 2 Type the default password Symbol The password is case sensitive OK Registers settings but does not save them in NVM nonvolatile memory A reset command returns to previously saved settings Save Saves all settings including ones not on that screen to NVM This is the same as Save Configuration in the Special Functions screen Save ALL APs To save the AP in...

Page 50: ...ess to the UI This includes enabling or disabling the Telnet Logins or changing the System Password To change Telnet access to the AP 1 Select Set System Configuration from the Main Menu 2 Select Telnet Logins 3 Press the SPACE BAR or LEFT RIGHT ARROW keys to toggle between Enabled and Disabled 4 Use the TAB key to highlight the SAVE F1 function at the bottom of the screen press ENTER to confirm s...

Page 51: ...n on the AP 1 Select Set Serial Port Configuration from the Main Menu 2 Set the Port Use parameter to PPP 3 Set the Modem Connected parameter to Yes Configure the other settings as required on the AP Answer Wait Time The time waiting for a remote connection before dropping the attempt The default is 60 seconds from a 5 to 255 second range Modem Speaker AP sends a command to the modem to turn on of...

Page 52: ...ng with the following parameters 5 Dial out to the AP with the correct telephone number No password required 6 Press ESC to refresh the display The AP displays the Main Menu Hanging Up To hang up from the UI while connected 1 Select the Special Functions Menu from the Main Menu 2 Select Modem Hangup 2 2 4 Navigating the UI Via a Web Browser Refer to the online help file for information on Web Brow...

Page 53: ... Enter Admin Mode 2 Select AP Installation from the Main Menu to display Symbol Access Point Access Point Installation Unit Name Symbol Access Point Additional Gateways IP Address 157 235 101 152 157 235 101 2 0 0 0 0 Gateway IP Address 157 235 101 1 0 0 0 0 0 0 0 0 Subnet Mask 255 255 255 0 0 0 0 0 0 0 0 0 Net_ID ESS 101 0 0 0 0 Antenna Selection Diversity On DHCP Enabled OK CR Save F1 Save ALL A...

Page 54: ...perform this option only among the same hardware platforms and same firmware versions 7 To disregard any changes made to this screen and return to the previous menu select Cancel ESC Subnet Mask The first two sets of numbers specify the network domain the next set specifies the subset of hosts within a larger network and the final set specifies an individual computer These values help divide a net...

Page 55: ...ring Disabled Ethernet Timeout 0 WNMP Functions Enabled AP AP State Xchg Enabled Telnet Logins Enabled System Password Symbol Ethernet Interface On PPP Interface Off Agent Ad Interval 0 RF Interface On S24 Mobile IP Enabled Mobile Home MD5 key Symbol Default Interface Ethernet AP Auto Configure Enabled MU MU Disallowed Off Web Server Enabled OK CR Save F1 Save ALL APs F2 Cancel ESC Save then reset...

Page 56: ... agent advertisement transmission S24 Mobile IP If enabled this feature allows MUs to roam across routers Mobile Home MD5 key Secret key used for Mobile Home registration and authentication MU MU Disallowed If enabled mobile units associated with the same AP are not allowed to communicate with each other Web Server Enables the use of a Web based browser to access the UI instead of HyperTerminal or...

Page 57: ...NMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and same firmware versions 8 To disregard any changes made to this screen and return to the previous menu select Cancel ESC Ethernet Interface Enables or disables wired Ethernet The default value ...

Page 58: ...lay Symbol Access Point RF Configuration DTIM Interval 10 BC MC Q Max 10 Reassembly timeout 9000 Max Retries d 15 Max Retries v 3 Multicast Mask d 09000E00 hex Multicast Mask v 01005E00 hex Beacon Interval 100 K us Accept Broadcast ESSID Disabled MU Inactivity Timeout 60 min Rate Control 5 5 11 Mb s Optional 1 2 Mb s Required RTS Threshold 2347 bytes CCA Mode Carrier Sense CCA Energy Threshold 60 ...

Page 59: ...ingle voice packet transmission The default is 5 Do not modify Multicast Mask d Supports broadcast download protocols for any MU typically Point of Sale terminals requiring the expedited download of a new operating image over the network instead of using a local nonvolatile drive All multicast downstream data packets that match the top 32 bits of the multicast mask are forwarded immediately instea...

Page 60: ...rity MUs require using Broadcast ESS to use this function MU inactivity Timeout Allows industry standard device interoperability by specifying the time the AP allows for MU inactivity A Spectrum24 AP recognizes MU activity through data packet transmission and reception and through scanning Spectrum24 MUs conduct active scanning Other industry standard MUs might conduct passive scans and a Spectrum...

Page 61: ... Configuration information to all APs with the same Net_ID ESS select Save ALL APs F2 This option saves the configuration changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and same firmware versions 6 To ...

Page 62: ...l Port Configuration from the Main Menu to display Symbol Access Point Serial Port Configuration Port Use PPP Answer Wait Time 60 Connect Mode Answer Inactivity Timeout 5 Modem Connected No PPP Timeout 3 Dialout Mode Auto PPP Terminates 10 Modem Speaker On Dialout Number 1234567 OK CR Save F1 Cancel ESC Use the space bar or left right cursor keys to change 2 Set the Port Use parameter to PPP 3 Ver...

Page 63: ...ng AP with dial out information to the answering AP The answering AP waits for the originating AP to dial into it See Appendix B Supported Modems for modems supported by the AP Dial out manually through the Special Functions menu or dial out automatically on boot 2 6 4 Originating AP From the originating APs UI 1 Select Set Serial Port Configuration from the Main Menu 2 Set the Port Use parameter ...

Page 64: ...connection before dropping attempt The default is 60 from a 5 to 255 second range Modem Speaker Sends a command to the modem to turn on or off the modem speaker The default is On PPP Timeout Controls the time out between issuing a PPP packet and expecting a reply This is necessary if the serial connection has long delay periods The 0 value indicates no time out The default is 3 from a 0 to 255 sec...

Page 65: ...anual dial out For automatic dial out reset the AP To hang up 1 Select the Special Functions Menu from the Main Menu 2 Select Modem Hangup 2 7 Configuring the SNMP Agent An SNMP manager application gains access to the AP SNMP agent if it has the AP IP address The agent configures as read only read write or disabled to provide security when using SNMP The AP sends specific traps for some conditions...

Page 66: ...ode Read Write Read Only Community public Read Write Community Symbol Trap IP Address 0 0 0 0 All Traps Disabled Generic Traps Cold Boot Disabled Authentication failure Disabled Enterprise Specific Traps Radio Restart Disabled Access Cntrl Violation Disabled MU State Change Disabled DHCP Change Disabled OK CR Save F1 Save ALL APs F2 Cancel ESC Use the space bar or left right cursor keys to change ...

Page 67: ... Configuration screen Trap IP Address Trap manager IP address All Traps Enables or disables all trap operations The default value is Disabled Cold Boot Send a trap to manager when the AP cold boots The default value is Disabled Authentication failure Indicates that community strings other than those specified for the Read Only and Read Write Community were submitted The default value is Disabled R...

Page 68: ...messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and same firmware versions 6 To disregard any changes made to this screen and return to the previous menu select Cancel ESC DHCP Change If enabled this trap generates the following enterprise specific...

Page 69: ...ype range individual 2 Use the UP DOWN ARROW keys to toggle between range and individual 2 8 1 Range of MUs To select a range of MAC addresses 1 Type in the minimum MAC address as the top value 00 0A F8 F0 01 01 2 Press ENTER to accept the value use the DOWN ARROW key to select the maximum value 3 Type in the maximum MAC address in the bottom value 00 0A F8 F0 02 FF 4 Press ENTER to accept the val...

Page 70: ... ALL APs F3 This option saves the configuration changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and firmware versions 10 To return to the previous menu select Exit ESC When users enable the Access Contr...

Page 71: ...MAC address Users can enter MAC addresses without colons 5 To save the AP installation configuration information to all APs with the same Net_ID ESS select Save ALL APs F3 This option saves the configuration changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perfo...

Page 72: ... to save changes 2 8 5 Removing All Allowed MUs The AP provides a facility to remove all MUs from the ACL 1 Select Special Functions from the Main Menu 2 Select Clear ACL 2 8 6 Load ACL from MU List This option from the Special Functions menu takes all associated MUs and creates an ACL from them This builds an ACL without having to manually type addresses Edit the ACL using the add and delete func...

Page 73: ...ACL 512 is the number of entries available to both ACL and Disallowed Address Filtering entries Select Set Address Filtering from the Main Menu to display Symbol Access Point Disallowed Addresses 00 A0 F8 F0 00 0A 00 A0 F8 FF FF C7 00 A0 F8 F0 00 01 00 A0 F8 FF FF 89 00 A0 F8 FE 10 01 00 A0 F8 F0 03 0A 00 A0 F8 F0 03 A1 00 A0 F8 B0 A0 09 00 A0 F8 F1 A2 08 00 A0 F8 F0 08 08 00 A0 F8 F2 06 01 00 A0 ...

Page 74: ...o remove MUs from the list 1 Highlight the MAC address using the UP DOWN ARROW keys 2 Select Delete F1 to delete the MAC address 2 10 Configuring Type Filtering Packet types supported for the type filtering function include the 16 bit DIX Ethernet types The list can include up to 16 types 2 10 1 Adding Filter Types The Type Filtering screen provides a facility to add types to the list 1 Select Add...

Page 75: ...o all APs with the same Net_ID ESS select Save ALL APs F2 Users can perform this option only among the same hardware platforms and firmware versions Users can only enable one type filtering option at a time 2 11 Clearing MUs from the AP Clear the MU association table for diagnostic purposes Clear MUs from the AP if the AP has many MU associations no longer in use Use this option to ensure that MUs...

Page 76: ...ption keeps the log concise through the 128 entry circular buffer 1 Select Set Event Logging Configuration from the Main Menu to display Symbol Access Point Event Logging Configuration Any Event Logging Enabled Security Violations Enabled MU State Changes Enabled WNMP Events Disabled Serial Port Events Enabled AP AP Msgs Enabled Telnet Logins Enabled System Events Enabled Ethernet Events Disabled ...

Page 77: ...changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and firmware versions 6 To disregard any changes made to this screen and return to the previous menu select Cancel ESC Any Event Logging Logs all events l...

Page 78: ... TCP for DOS or OnNet for Windows The wireless TFTP upgrade method requires a connection between the AP and a TFTP server The TFTP server can be running on a Symbol Spectrum24 device Updating the firmware requires a TFTP server running in the background To update the AP firmware 1 Copy the Firmware files DSAP_FW BIN and DSAP_HTM BIN on the terminal or PC hard disk 2 Telnet to the AP using its IP a...

Page 79: ...me is accurate See step one 7 Enter the TFTP Server IP address in the TFTP Server field 8 Press ENTER 9 Select Save Configuration to save settings If using telnet to connect to the AP via an Ethernet interface do not use the Use XMODEM to Update Access Point s Firmware option This option causes the AP to reset and look for the firmware file over the serial interface 10 Select Special Functions fro...

Page 80: ...mber on the System Summary screen 16 Press CTRL D to end Telnet session 17 Repeat process for other APs in the network 2 13 2 Updating using Xmodem The Xmodem upgrade method requires a direct connection between the AP and PC using a Null modem serial cable and using software like HyperTerminal for Windows 95 Xmodem supports file transfers between terminal emulation programs and the AP UI Xmodem tr...

Page 81: ...nication port typically Direct to Com1 along with the following parameters 6 Select OK 7 Press ENTER to display the Main Menu 8 Select Enter Admin Mode and type the password Symbol The password is case sensitive 9 Enter the Special Functions screen 10 Under the function heading Use XMODEM to Update Access Point s select Firmware HTML or Both 11 Press ENTER emulation ANSI baud rate 19200 bps data b...

Page 82: ...le before a send An incorrect file can render the AP inoperable 13 From the emulation program menu bar select Transfer 14 Select the Send File command 15 Select the Browse button and locate the file s DSAP_FW BIN and DSAP_HTM BIN 16 Select the XModem protocol from the drop down list 17 Click Send 18 The terminal or PC displays the transfer process through a progress bar 19 If downloading both the ...

Page 83: ...itiating AP sends the correct file name for each Symbol platform The initiating AP does not send update commands to non Symbol platforms Users can find the specific APs that have firmware upgraded or downgraded on the Known APs screen The time interval between the WNMP update firmware commands for updating each AP is 2 seconds This interval prevents more than one AP from accessing the TFTP server ...

Page 84: ...ns from the Main Menu 5 Select Alter Filename s HELP URL TFTP Server and press ENTER 6 Type the firmware file name in the Download Filename field dsap_fw bin or dsap_htm bin Change this only if the user or system network administrator requires a new file name The defaults are DSAP_FW BIN and DSAP_HTM BIN Ensure the file name is DSAP_FW BIN and DSAP_HTM BIN unless the user changed the file name Ver...

Page 85: ...rompt type the password Symbol The password is case sensitive The AP displays the Main Menu 14 Verify the accuracy of the version number on the System Summary screen 15 Press CTRL D to end the Telnet session 2 15 Performing Pings An access point sends a ping packet to an MU and waits for a response Use pings to evaluate signal strength between two stations The other station can exist on any AP int...

Page 86: ...F Configuration Show Known APs Set Serial Port Configuration Show Ethernet Statistics Set Access Control List Show RF Statistics Set Address Filtering Show Misc Statistics Set Type Filtering Show Event History Set SNMP Configuration Enter Admin Mode Set Event Logging Configuration Regular Home Agent Foreign Agent 2 Select Regular from the Show Mobile Units screen to display Symbol Access Point Mob...

Page 87: ... of Requests 10 Packet Length 10 Packet Data 55 Start CR Cancel ESC Enter the MAC address of the station to echo 1 Enter the number of echo requests 1 to 539 length of packets in bytes 1 to 539 and data content in hex 0x00 to 0xFF 2 Select Start CR to begin The AP dynamically displays packets transmitted and received Echo Test in Progress Station Address 00 A0 F8 10 4A 13 Requests Transmitted 1 Re...

Page 88: ...ce the message digest is computed using a mathematical formula or algorithm the probability of an entity reproducing the message digest is equivalent to two people having the same fingerprints The message digest is the authentication checksum of a message from a mobile MU to an AP during the Home Agent registration process The MD5 algorithm purpose therefore prevents an MU from impersonating an au...

Page 89: ...ame s HELP URL TFTP Server DHCP Reset AP Firmware Filename dsap_fw bin HTML Filename dsap_htm bin Run MKK Tests HELP URL http 157 233 68 00 Spectrum24WebHelp TFTP Server 157 235 99 236 Restore Factory Config Save Configuration Save All APs Save Config to All APs Exit ESC 2 Select Save Configuration and press ENTER The Save All APs function saves only the five preceding items The function does not ...

Page 90: ...its LEDs as if powering up and returns to a STATUS flashing state 2 19 RHVWRULQJ WKH DFWRU RQILJXUDWLRQ If the AP fails to communicate due to improper settings restore the factory configuration defaults Restoring configuration settings clears all configuration and statistics for the AP To restore factory configuration 1 Select Special Functions from the Main Menu 2 Select Restore Factory Configura...

Page 91: ... about the APs configuration To view information about the AP configuration 1 Select Show System Summary from the Main Menu to display Symbol Access Point System Summary Unit Name Symbol Access Point MAC Address BSS 00 A0 F8 73 51 F2 Access Control Disabled IP Address 157 235 95 225 Net_ID ESS CA2 Model Number DSAP Serial Number S F559123 Channel 3 Hardware Revision Rev 2 Country United States Ant...

Page 92: ...t in turn determines the AP direct sequence channel range Antenna Selection Indicates if the AP is configured for single or dual antenna mode Rate control Defines the rate used by the AP to transmit data 5 5 11 Mbps Optional 1 2 Mbps Required Current MUs Specifies the current number of associated MUs Total Assoc Specifies the total MU associations handled by this AP System Up Time Specifies how lo...

Page 93: ...guration requests SNMP Telnet Select Interface Statistics from the Main Menu to display Symbol Access Point Interface Statistics Interface Counts Packets Packets Bytes Bytes Sent Rcvd Sent Rcvd Ethernet 14066 0 1260844 0 PPP 0 0 0 0 RF 0 0 0 0 AP 13975 0 1257750 0 Interface Rates PPS PPS BPS BPS Sent Rcvd Sent Rcvd Ethernet 0 0 0 0 PPP 0 0 0 0 RF 0 0 0 0 AP 0 0 0 0 Refresh F1 Timed F2 Exit ESC To ...

Page 94: ... broadcast packets Bcast transmitted from the AP Select Forwarding Counts from the Main Menu to display Symbol Access Point Forwarding Counts From To Ethernet PPP RF AP Ethernet 0 0 0 0 PPP 0 0 0 0 RF 0 0 0 0 AP 0 0 0 0 Bcast 14085 14085 0 0 Refresh F1 Timed F2 Exit ESC To update the values manually select Refresh at the status display To have the AP automatically update the display every two seco...

Page 95: ...is also shown in the Foreign Agent Table and Regular screens of the new foreign AP to tell the new AP where to expect packets from for newly associated MUs The AP Regular screen shows the MUs associated locally on the same subnet Select Show Mobile Units from the Main Menu to display Symbol Access Point MAIN MENU Show System Summary AP Installation Show Interface Statistics Special Functions Show ...

Page 96: ...press TAB to highlight the MU and select Ping This allows the AP to ping an MU See 2 15 Performing Pings on page 77 to have the AP automatically update the display every two seconds select Timed to display the next screen select Next to return to the previous menu press ESC addr MU MAC address in xx xx xx xx xx xx format p MUs power mode P for PSP C for CAM An unassociated MU does not display any ...

Page 97: ...11 Priority Normal Last Data Activity 16 37 14 Encryption Off Refresh F1 Exit ESC Displayed information includes Interface the AP interface shows the MU connection RF Ethernet PPP or AP State the connection state between the AP and the MU Host indicates the unit is on the AP or PPP interface Associated indicates the current association on the radio interface Away indicates the unit is no longer as...

Page 98: ...data to the station Encryption MU encryption type supported Open or Shared Packets Sent the packets sent by the AP to the MU Packets Rcvd the packets received by the AP from the MU Bytes Sent the bytes sent by the AP to the MU Bytes Rcvd the bytes received by the AP from the MU Discard Pkts CRC the packets discarded because of data error Last Activity the time in hours minutes and seconds since th...

Page 99: ...Table Mobile Unit Foreign Agent Mobile Unit Foreign Agent 157 235 95 184 157 235 96 141 157 235 95 111 157 235 97 157 157 235 95 125 157 235 96 141 157 235 95 34 157 235 93 245 Refresh F1 Timed F2 Next F3 Exit ESC Select Foreign Agent from the Mobile Units prompt to display Symbol Access Point Foreign Agent Table Mobile Unit Home Agent Mobile Unit Home Agent 157 235 95 184 157 235 95 180 157 235 9...

Page 100: ...essage to APs every 12 seconds determines this list The Save All APs function from the Special Functions Menu updates configures all APs firmware HTML code shown in the Known APs menu Users can perform this option only among the same hardware platforms and firmware versions Select Known APs from the Main Menu to display Symbol Access Point Known Access Points Net_ID 101 MAC Address IP Address CH H...

Page 101: ... Collisions 0 Discarded Buffer 0 Late Collisions 0 Discarded CRC 0 Defers 0 Broadcast Multicast 0 Individual Address 0 Refresh F1 Timed F2 Exit ESC MAC Address the unique 48 bit hard coded Media Access Control address known as the devices station identifier IP Address the network assigned Internet Protocol address DS Channel The direct sequence channel used by the AP MUS The MUs associated with th...

Page 102: ...own list of database entries Discarded Forced packets discarded because of the applied address filters Discarded Buffer packets discarded because insufficient buffers in AP Discarded CRC packets discarded because of data errors Broadcast Multicast total broadcast or multicast packets received Individual Address packets received with designated individual addresses Packets Sent total packets sent o...

Page 103: ...ts Rcvd 494 Data Bytes Sent 0 Data Bytes Rcvd 36524 BC MC Packets Sent 28 BC MC Packets Rcvd 23 BC MC Bytes Sent 2904 BC MC Bytes Rcvd 0 Sys Packets Sent 5 Sys Packets Rcvd 0 SBC MC Packets Sent 14120 SBC MC Packets Rcvd 520 Succ Frag Packets 0 Succ Reass Packets 0 UnSucc Frag Packets 0 UnSucc Reass Packets 0 Fragments Sent 0 Fragments Rcvd 0 Packets w o Retries 0 Rcv Duplicate Pkts 0 Packets w Re...

Page 104: ...nt packet fragments transmitted Packets w o Retries transmitted packets not affected by retries Packets w Retries transmitted packets affected by retries Packets w Max Retries transmitted packets affected by the maximum limit of retries Total Retries Retries occurring on the interface A retry occurs if the device fails to receive an acknowledgment ACK from a destination Data Packets Rcvd total dat...

Page 105: ...nd transmitted the packet again Undecryptable Pkts total data packets that could not be decrypted Rcv CRC Errors Packets received that contained CRC Cyclic Redundancy Check errors An MU transmitted a corrupt data packet and failed to pass the CRC verification Ensure that any acknowledgment of the data packet contains the correct CRC word An incorrect CRC causes the AP to discard the data packet Rc...

Page 106: ...ccess Point Misc System Statistics WNMP Serial Port Echos 0 Number of Dialouts 0 Pings 0 Dialout Failures 0 Passthrough Echos 0 Number of Answers 0 Current Call Time 0 SNMP Last Call Time 0 Requests 0 Traps 0 Mobile IP Agent Ad Sent 0 Filters Reg Request Rcvd 0 ACL Violations 0 Reg Reply Sent 0 Address 0 type 0 Per Frequency Retry Histogram Refresh F1 Timed F2 Exit ESC WNMP statistics include Echo...

Page 107: ...nager Traps AP messages sent to the SNMP manager ACL Violations attempts by MU not in ACL list to associate with this AP Address packets discarded by address filter Type packets discarded by type filter Number of Dialouts dial out attempts by the AP Dialout Failures dial out failures by the AP Number of Answers answer attempts by the AP Current Call Time current connection session length in second...

Page 108: ...itting or receiving due to retries To view statistics for individual frequencies 1 Select Show Misc Statistics from the Main Menu 2 Select Per Frequency Statistics to display Chnl Sent Rcvd Retry 1 0 0 0 2 0 0 0 3 88 89 3 4 0 0 0 5 0 0 0 6 0 0 0 7 0 0 0 8 0 0 0 9 0 0 0 10 0 0 0 11 0 0 0 Press any key to continue The display shows counters for the packets sent received and retries for each channel ...

Page 109: ...tions transmitting simultaneously and causing collisions the receiving station moving out of range the receiving station being powered off Any one of these results causes both devices to suspend transmitting and retry later Too many retries can indicate a system problem To view retry severity 1 Select Show Misc Statistics from the Main Menu 2 Select Retry Histogram to display Retries Packets 0 657...

Page 110: ...P powered up or reset The type of event logged follows the time stamp If the event involves an MU or AP the unit MAC address displays Symbol Access Point Event History pg 2 Warning Event logging is frozen while this screen is displayed 0 04 45 MU Assoc 00 A0 F8 FF FD 80 0 02 45 MU Rm Roam adr 00 A0 F8 FF FD 5D 0 01 50 MU Assoc 00 A0 F8 FF FD 5D 0 00 19 Received AP Info from 00 A0 F8 00 C2 9C 0 00 ...

Page 111: ...4111 DS Access Point Product Reference Guide 103 3 11 Clearing Statistics To clear statistics 1 Select Special Functions from the Main Menu 2 Select Clear All Statistics The AP zeroes all statistics Resetting the AP also clears statistics ...

Page 112: ...Monitoring Statistics 104 Spectrum24 AP 4111 DS Access Point Product Reference Guide ...

Page 113: ...rify the following Do not install in wet or dusty areas without additional protection Contact a Symbol representative for more information Verify the environment has a temperature range between 20 C to 55 C If attaching to a wired Ethernet keep AP on the same subnet 4 2 Package Contents Check package contents for AP power adapter Contact the Symbol Support Center to report missing or improperly fu...

Page 114: ...e the radio network with an MU 4 3 1 Network Connection Locate connectors for Ethernet and power on the back of the AP Ethernet configurations vary according to the environment Determine the Ethernet wiring to connect the AP 10Base T UTP or single cell The site survey determines the number of APs to install and their location 4 3 2 10Base T UTP Use a 10Base T connection for an AP attached to a wir...

Page 115: ...delines Install the AP as high as practical Orient the AP vertically for best reception Point the AP antenna downward if attaching the AP to the ceiling The AP 4111 DS dual antenna assembly provides diversity that can improve performance and signal reception Symbol continues to add antenna options for Spectrum24 devices Contact a Symbol sales representative for available antenna options 4 5 Power ...

Page 116: ...y 2 Plug the power adapter cable into the socket at the back of the AP 3 Plug the adapter into an outlet The AP is functional when the Status indicator on the front of the AP reaches a consistent flashing and the Wireless LAN Activity indicator begins flickering This indicates that the AP is ready for MUs to associate with it The AP works without user intervention after setup See the AP LED indica...

Page 117: ...ndicators provide a status display indicating transmission and other activity The indicators are Power Flashing indicates AP initialization Steady Green during operation Wired LAN Activity Flashing indicates data transfers on wired connection Wireless LAN Activity Flickering indicates beacons and data transfers with MUs ...

Page 118: ...passes Identify wired network problems 1 No operation Verify AP configuration via Telnet PPP or UI Review procedures for Ethernet and serial connection of the AP Review AP firmware revisions and update procedures Verify network configuration by ensuring that there are no duplicate IP addresses Power down the device in question and ping the assigned address of the device Ensure no other device resp...

Page 119: ...y that antenna diversity setting for AP is appropriate If using one antenna the setting is Primary Only if using both antennas the setting is Primary and Secondary Verify network traffic does not exceed 37 of bandwidth Check to see that the wired network does not exceed 10 broadcast messages per second Verify wired network topology and configuration 4 10 Setting Up MUs Refer to MU documentation fo...

Page 120: ...Hardware Installation 112 Spectrum24 AP 4111 DS Access Point Product Reference Guide ...

Page 121: ... 8 5 W 4 45 cm H x 15 24 cm L x 21 59 cm W Weight w power supply 1 lbs 0 454 kg Operating Temperature 4º F to 131º F 20º C to 55º C Storage Temperature 40º F to 149º F 40º C to 65º C Humidity 10 to 95 noncondensing Shock 40 G 11 ms half sine ESD meets CE Mark Drop withstands up to a 30 in 76 cm drop to concrete with possible surface marring ...

Page 122: ...0 2447 5 8 Israel 2457 2463 10 11 Spain 2458 2472 10 13 France 2483 2485 14 Japan Radio Data Rate 5 5 11 Mbps Optional 1 2 Mbps Required 11 Mbps Range open environment over 100 ft typical office or retail environment 30 to 50 ft TX Max Radiated EIRP US FCC part 15 247 Europe ETS 300 320 Japan RCR STD 33 Modulation Binary GFSK TX Out of Band Emissions US FCC part 15 247 15 205 15 209 Europe ETS 300...

Page 123: ...port NDIS v4 0 and v5 0 Ethernet Frame DIX Ethernet_II and IEEE 802 3 Filtering Packet Rate 14 400 frames per second filtering and forwarding Ethernet Connection 10Base T RJ 45 Serial PC AT serial port DB9 Male RS 232 using a DTE termination 19200 bps SNMP Version 1 Symbol MIB 802 11 MIB and MIB II ...

Page 124: ...A 4 Spectrum24 Access Point AP 3020 Product Reference Guide ...

Page 125: ...le of working with various modems of 19200 baud or faster Symbol does not support modems the company has not qualified The following modems qualify to work with the AP 4111 DS access point US Robotics Faxmodem v 90 56K US Robotics Faxmodem v 33 6K US Robotics Faxmodem v 34 and v 32 bis Sportster 28 8K Diamond Supra Express 56K ...

Page 126: ...B 2 Spectrum24 Access Point AP 3020 Product Reference Guide ...

Page 127: ...available for further assistance and support Symbol Customer Support responds to calls by email telephone or fax within the time limits set forth in individual contractual agreements When contacting Symbol Customer Support please provide the following information serial number of unit model number or product name software type and version number North American Contacts Inside North America contact...

Page 128: ...echnical Support 12 Oaklands Park Berkshire RG41 2FD United Kingdom Tel 011 44 118 945 7000 or 1 516 738 2400 ext 6213 Symbol Developer Program Web Site http sdp symbol com Additional Information Obtain additional information by contacting Symbol at 1 800 722 6234 inside North America 1 516 738 5200 in outside North America http www symbol com ...

Page 129: ...ses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense However there is no guarantee that interference will ...

Page 130: ...tandards EN 55 022 Limits and Methods of Measurement of Radio Interference Characteristics of Information technology Equipment EN 50 082 1 Electromagnetic Compatibility Generic Immunity Standard Part 1 Residential commercial Light Industry IEC 801 2 Electromagnetic Compatibility for Industrial Process Measurement and Control Equipment Part 2 Electrostatic Discharge Requirements IEC 801 3 Electroma...

Page 131: ...r The REN is used to determine the quantity of devices which maybe connected to the telephone line Excessive RENs on the telephone line may result in the device not ringing in response to an incoming call In most but not all areas the sum of the RENs should not exceed 5 0 To be certain of the number of devices that may be connected to the line as determined by the total number of RENs contact the ...

Page 132: ...ociated with a single line individual service maybe extended by means of a certified convector assembly telephone extension cord The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier Any repairs or alterat...

Page 133: ...tative for service and support Symbol Technologies Inc Canadian Sales and Service 2540 Matheson Boulevard East Mississauga Ontario Canada L4W 4Z2 Phone 905 629 7226 Laser Devices Symbol products using lasers comply with US 21CFR1040 10 Subchapter J and IEC825 EN 60 825 or IEC825 1 EN 60 825 1 depending on the date of manufacture The laser classification is marked one of the labels on the product C...

Page 134: ... scanners use a low power visible light diode As with any very bright light source such as the sun the user should avoid staring directly into the light beam Momentary exposure to a Class 2 laser is not known to be harmful Laser information labels are found in the product Quick Reference Guide ...

Page 135: ...et 7 bridging 13 BSS_ID 7 CAM 23 cell 7 cellular coverage 7 Characteristics A 1 chipping sequence 17 clear statistics 103 clearing MUs 67 configure 21 country code 84 data encryption 3 data rate 1 decryption 24 dial up access 28 direct sequence 17 disallowed address 10 encryption 24 Ethernet device 4 Ethernet statistics 93 Ethernet traffic 2 Ethernet wired LANs 2 event history 102 Extended Service...

Page 136: ...ey 8 site topography 8 SNMP management 26 Supported Modems B 1 system password 42 system summary 83 TCP IP 33 Telnet 29 topologies 5 troubleshooting 110 type filtering option 11 UI 28 Web browser 33 wired network 110 WNMP statistics 98 ACL 61 adding allowed MUs 63 configuring 61 disallowed address 10 enable disable 64 filtering 11 load ACL from MU list 64 removing allowed MUs 63 unauthorized acces...

Page 137: ...ring 65 BC MC Q 51 beacon interval 51 broadcast ESSID 52 data transmission rate 52 dial up connection 43 dial up system 44 DTIM packet frequency 51 manually updating AP firmware 70 maximum retries 51 Mobile IP 91 MU 52 multicast mask 51 PPP 54 PPP Direct 54 radio parameters 50 resetting 82 restoring 82 saving 80 serial port connection 43 SNMP agent 57 system parameters 47 TCP IP 29 Telnet 29 UI 29...

Page 138: ...t AP 11 Mobile IP 11 DHCP support 11 dial up connection configuration 43 digital data 4 disallowed address 10 access control 10 ACL 10 AP 10 disallowed MUs 66 E electromagnetic waves 4 encryption 24 environment 4 ESSID 52 Ethernet interface 12 ethernet statistics 93 Ethernet wired LAN 2 F features 3 10baseT Ethernet port interface 3 built in diagnostics 3 built in dual antenna assembly 3 DHCP supp...

Page 139: ...EEE address 4 MAC 4 IP 14 bridging 14 forwarding address 21 roaming across routers 21 IP Address 87 AP 87 MU 87 K known APs 92 MAC and IP addresses 92 statistics 92 L LED indicators 109 description 109 M MAC Layer Bridging 9 address database 9 MAC address 9 management options 26 SNMP 26 Telnet 26 WLAN 26 miscellaneous statistics 98 Mobile IP 20 configuration 80 foreign agent 21 91 mapping 91 roami...

Page 140: ...programmable SNMP trap 26 management stations 26 MIB 26 SNMP agent 26 PSP stations 23 beacon 23 MU 23 R radio basics 4 carrier signal 4 center frequency 4 digital data 4 electromagnetic waves 4 environment 4 ethernet device 4 IEEE address 4 MAC 4 radio links 4 receiving antenna 4 wireless network 5 radio interface 12 radio parameters 50 AP 50 BC MC Q maximum 51 beacon interval 51 broadcast ESS 52 ...

Page 141: ...4 radio basics 4 regulatory requirements 2 wireless network 1 spread spectrum 2 4GHz 1 2 5GHz 1 statistics 83 data transmission rate 84 ethernet 93 filter 99 forwarding counts 86 interface statistics 85 IP address 93 known APs 92 Mobile IP 91 modem 99 RF Statistics 95 SNMP 99 WNMP 98 system parameters 47 access control 48 configuration 48 Ethernet timeout 48 MD5 key 48 system password 48 Telnet lo...

Page 142: ...10 no connection 110 slow or erratic performance 111 SRAM test 110 wired network operation 110 wired network problems 110 U UI 29 access 29 changing access 42 configuration 29 dial up access 28 dial up connection 32 direct serial access 28 hanging up 44 navigation 39 password 29 Telnet 28 Usage 28 Web browser 28 W Web browser 33 WEP algorithm 24 X Xmodem 72 ...