Lantronix Device Server UDS 10 User Manual Download

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UDS-10 User Guide

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Summary of Contents for Device Server UDS 10

Page 1: ...UDS 10 User Guide Revision D 07 15 02 Part Number 900 207 ...

Page 2: ...s of America Ethernet is a trademark of XEROX Corporation UNIX is a registered trademark of The Open Group Windows 95 Windows 98 Windows 2000 and Windows NT are trademarks of Microsoft Corp Netscape is a trademark of Netscape Communications Corporation Lantronix 15353 Barranca Parkway Irvine CA 92618 USA Phone 949 453 3990 Technical Support Phone 800 422 7044 or 9949 453 7198 Fax 949 450 7226 On l...

Page 3: ...nce when operating in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with this guide may cause harmful interference to radio communications Changes or modifications to this device not explicitly approved by Lantronix will void the user s authority to operate this device The information in this guide may chan...

Page 4: ...d Immunity Field Test IEC61000 4 4 1995 Electrical Fast Transient Test IEC61000 4 5 1995 Power Supply Surge Test IEC61000 4 6 1996 Conducted Immunity Test IEC61000 4 8 1993 Magnetic Field Test IEC61000 4 11 1994 Voltage Dips Interrupts Test L V D Directive 73 23 EEC Supplementary Information This Class A digital apparatus has been verified as being compliant within the Class A limits of the FCC Ra...

Page 5: ...media to Lantronix Lantronix will ship the replacement media to the customer In no event will Lantronix be responsible to the user in contract in tort including negligence strict liability or otherwise for any special indirect incidental or consequential damage or loss of equipment plant or power system cost of capital loss of profits or revenues cost of replacement power additional expenses in th...

Page 6: ...d lantronix com Germany Karlstrasse 49 78054 VS Schwenningen Germany Tel 49 0 77 20 30 1620 Fax 49 0 77 20 30 1688 ursula koch lantronix com Asia Pacific 16th Floor Cheung Kong Center 2 Queen s Road Central Hong Kong Tel 852 2297 2287 Fax 852 2297 2357 asiapacsales lantronix com EMEA Sales Europe Mid East Africa eu_sales lantronix com eu_order lantronix com EMEA Technical Support 49 0 7720 3016 20...

Page 7: ... 9 LEDs 1 10 1 10 Dimensions 1 11 1 11 Product Information Label 1 11 1 12 Software Support 1 11 1 13 Power Requirements 1 12 1 14 Reset Switch 1 12 1 15 Technical Specifications 1 13 2 Getting Started 2 1 2 1 Addresses and Port Number 2 1 2 1 1 Ethernet MAC Address 2 1 2 1 2 Internet Protocol IP Address 2 1 2 1 3 Port Number 2 2 2 2 Physically Connecting the Unit 2 2 2 3 Methods of Assigning the ...

Page 8: ...on Network Configuration 3 12 3 5 1 IP Address 3 12 3 5 2 Set Gateway IP Address 3 12 3 5 3 Netmask Number of Bits for Host Part 3 13 3 5 4 Change Telnet configuration password 3 14 3 5 5 DHCP Naming 3 14 3 6 Channel 1 Configuration Serial Port Parameters 3 15 3 6 1 Baudrate 3 15 3 6 2 I F Interface Mode 3 15 3 6 3 Flow 3 17 3 6 4 Port Number 3 17 3 6 5 Connect Mode 3 18 3 6 6 Remote IP Address 3 ...

Page 9: ... 4 Via the Serial Port 4 6 5 DeviceComm Manager 5 1 5 1 Installing DeviceComm Manager 5 2 5 1 1 Install DeviceComm Manager 5 2 5 1 2 Setup 5 3 6 Troubleshooting 6 1 6 1 Technical Support 6 1 6 1 1 Technical Support 6 1 7 Monitor Mode 7 1 7 1 Monitor Mode 7 1 7 1 1 Entering Monitor Mode Via the Serial Port 7 1 7 1 2 Entering Monitor Mode Via the Network Port 7 1 7 1 3 Monitor Mode Commands 7 1 8 Ne...

Page 10: ...8 15 8 4 5 Broadcast Address 8 15 8 4 6 Private IP Networks and the Internet 8 16 8 4 7 Network RFCs 8 16 9 Binary to Hex Conversion 9 1 9 1 Connect Mode Options 9 2 9 2 Disconnect Mode Options 9 5 9 3 Flush Mode Buffer Flushing Options 9 7 9 4 Interface Mode Options 9 13 9 5 Pack Control Options 9 14 10 IP Addresses 10 1 10 1 Class A Network 10 1 10 2 Class B Network 10 1 10 3 Class C Network 10 ...

Page 11: ... Figure 8 Search Network Window 2 8 Figure 9 Devices in a Group 2 9 Figure 10 Device Management Window 2 10 Figure 11 Lantronix Web Manager 3 4 Figure 12 Server Properties Configuration on the Web Browser 3 6 Figure 13 Setup Mode Window 3 11 Figure 14 Device Installer 4 2 Figure 15 Search Network Window 4 3 Figure 16 Devices in a Group 4 3 Figure 17 Upgrade Firmware 4 4 Figure 18 TFTP Dialog Box 4...

Page 12: ... and Error Messages 6 3 Table 17 Monitor Mode Commands 7 2 Table 18 Command Response Codes 7 2 Table 19 UDP Configuration 8 1 Table 20 Block Types 8 5 Table 21 Setup Record Construction 8 7 Table 22 Channel Parameters 8 8 Table 23 Interface Mode Options 8 9 Table 24 Common Interface Mode Settings 8 9 Table 25 Baud Rate Settings 8 10 Table 26 Flow Control Options 8 10 Table 27 Connect Mode Options ...

Page 13: ...Contents UDS 10 User Guide vii Table 38 Disconnect Mode Options 9 5 Table 39 Flush Mode Options 9 7 Table 40 Interface Mode Options 9 13 Table 41 Pack Control Options 9 14 ...

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Page 15: ...or reference only It is part of the UDS 10 family but is described in the Embedded Integration Kit EIK User Manual For all practical purposes it is the same as the UDS 10 but has no external metal case Most of the material in this manual applies to all of the UDS 10 products However in some cases there will be some features that apply to only one product In those cases a note will explain the vari...

Page 16: ...Data Collection Devices Universal Power Supply UPS Management Units Telecommunications Equipment Data Display Devices Security Alarms and Access Control Devices Handheld Instruments Modems The UDS 10 connects these devices through a TCP data channel or through a Telnet connection to computers or another Device Server Datagrams can be sent by UDP The UDS 10 supports RS 232 RS 422 485 via its DB 25F...

Page 17: ... RS485 interfaces In addition an RJ45 10BASE T connector is available for Ethernet access It will support network speeds of 10Mbps The UDS 10B board comes with various power supply options a power jack for 9 30 VDC or 9 24 VAC with maximum 140mA power via the DB25 inputs at either the regulated 5 VDC with maximum 200mA or the unregulated 9 30 VDC The UDS 10B s well developed IP firmware supports p...

Page 18: ...l serial links to be established over Ethernet and IP TCP IP UDP IP networks As a result limited distance point to point direct serial connections can be extended within the plant throughout the facility or across the global enterprise The following picture is one of the Device Servers in the IAP family Figure 1 UDS 10 IAP Lantronix provides IAP Device Servers specifically designed for different i...

Page 19: ...tocols include DF1 Rockwell Automation and Modbus Schneider Electric Where the IAP Standard Tunneling protocol is limited to exclusive standard ASCII device to device connections the industrial protocols offer connections to other devices that require special formatting or features simultaneously For information about using any of the industrial communication protocols see the user manuals on the ...

Page 20: ...rying to keep the packet count low The alternate packing algorithm minimizes the packet count on the network and is especially useful for applications in routed Wide Area Networks Various parameters can be set in this mode to economize the serial data stream 1 4 2 IP Address Every active device connected to the TCP IP network must have a unique IP address This IP address is used to reference a spe...

Page 21: ...nput RX in 1 13 14 25 GND DCD output Reg 5VDC Reg 9 30VDC RX in Note 1 Note 1 Note 2 Note 2 Note 1 The Device Server can alternately be powered up via the serial port using one of these pins Note 2 The minus sign is sometimes shown as A TXA and the plus sign is sometimes shown as B TXB 1 6 RJ 45 Ethernet Interface The UDS 10 s back panel contains a 9 30VDC power plug a reset switch and an RJ 45 10...

Page 22: ... Orange White The view is from the end of the connector Orange White Orange Green White Blue Blue White Green Brown White Brown View from Connector End 1 8 1 TX 2 TX 3 RX 6 RX Ethernet RJ45 Figure 2 RJ 45 Connector Table 1 Ethernet Interface Signals Signal Name DIR PIN Primary Function TX Out 1 Transmit Data TX Out 2 Transmit Data RX In 3 Differential Ethernet Receive Data RX In 6 Differential Eth...

Page 23: ... and configuration The serial device can be RS 232 or RS 485 422 The following diagram shows a typical interface cable for the RS 232 Serial interface The UDS M SBC is an optional male DB 25 to RS 485 screw block connector DCE 25 Pin MALE TX in RX in 4 3 2 1 5 9 8 7 6 CTS RTS DTR DSR GND TXD RXD DTE 9 Pin FEMALE 1 13 25 14 2 3 4 5 6 20 ...

Page 24: ...llisions Diagnostic Red Blinks or glows red in combination with the green Status LED to indicate error detection Red solid green Status LED blinking 1x EPROM checksum error 2x RAM error 3x Token Ring error 4x EEPROM checksum error 5x Duplicated IP address on the network Red blinking green Status LED blinking 4x Faulty network connection 5x No DHCP response received Status Green Lights solid green ...

Page 25: ... Rev D12 Revision 1 12 Software Support DeviceInstaller is a powerful software utility for configuring device servers from a network connection For more information see Using DeviceInstaller on page 3 2 Lantronix DeviceComm Manager is a Windows based COM port redirector software utility Its function is to redirect customer application data destined for a local serial COM port to the PC s network p...

Page 26: ... products has been changed from 6 9VDC to 9 30VDC The new power supply shipped with the product supplies voltage within the new 9 30VDC range Please note that this new power supply should only be used with the 9 30VDC UDS 10 products The correct input voltage is marked on a label above the power socket and on the back of the unit Power Socket 1 14 Reset Switch The unit has a reset switch located n...

Page 27: ...per hour 20 C 36 F Storage range 40 to 66 C 40 to 151 F Humidity 10 to 90 RH non condensing 40 to 60 recommended Case Metal case with mounting flanges Not UDS 10B Protocols Supported Auto IP ARP UDP IP TCP IP Telnet ICMP SNMP DHCP BOOTP TFTP and HTTP Network Interface RJ 45 10Base T Ethernet Data Rates 300 bps to 115 200 bps Serial Line Formats Characters 7 or 8 data bits Stop bits 1 2 Parity odd ...

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Page 29: ...ridge may remove the web pages and change the configure dialogs See the user manuals on individual protocols for protocol specific settings and configuration dialogs Protocol manuals are found on the software CD This section describes the setup and configuration dialogs for the Standard Tunnel Protocol Note The following information is based on the condition that a UDS 10 is loaded with Standard T...

Page 30: ...for the UDS 10 Use one of the cables described in Serial Interface Connection on page 1 9 to connect a PC COM port to the UDS 10 Ethernet RS 232 9 30VDC Ethernet Figure 3 UDS 10 Connected to Serial Device and Network 1 Connect a serial device to your unit See Serial Interface Connection on page 1 9 for more information about cable and connector specifications 2 Connect an Ethernet cable to the Eth...

Page 31: ...logged into the configuration port port 9999 This eliminates the possibility of several people simultaneously attempting to configure the unit See ARP and Telnet on page 2 11 AutoIP This automatic method is appropriate when you have a small group of hosts rather than a large network This method allows the hosts to negotiate with each other and assign addresses in effect creating a small network Se...

Page 32: ...t ships with a default IP address of 0 0 0 0 which automatically enables Auto IP within the unit AutoIP is an alternative to DHCP that allows hosts to automatically obtain an IP address in smaller networks that may not have a DHCP server A range of IP addresses from 169 254 0 1 to 169 254 255 254 has been explicitly reserved for AutoIP enabled devices The range of Auto IP addresses is not to be us...

Page 33: ...o to Serial Port Login on page 2 12 2 4 1 Install DeviceInstaller Software 1 Insert the product CD into your CD ROM drive The CD will automatically start and display the main window If the CD does not launch automatically a Click the Start button on the Task Bar and select Run b Enter your CD drive letter colon backslash deviceinstaller exe e g E deviceinstaller exe Figure 4 CD Main Window 2 Click...

Page 34: ...Device Installer Device Installer The Device Installer window displays Figure 5 DeviceInstaller Window 1 Click the IP icon The Assign IP Address window displays Figure 6 Assign IP Address Window 2 In the Enter the Hardware or Ethernet Address field enter the Ethernet address MAC address which is listed on the label on the side of the unit ...

Page 35: ...turn to the DeviceInstaller window 2 4 3 Test the IP Address 1 Click the Ping icon The Ping Device window displays Figure 7 Ping Device Window 2 Confirm that Reply received messages display in the window indicating that the IP address has been entered successfully Note If you do not receive Reply received messages make sure the unit is properly attached to the network and that the IP address assig...

Page 36: ...work so that you can manage and configure it 1 Click the Search the network for devices icon The Search Network window displays Figure 8 Search Network Window 2 Select the PC Network Class Class C is the default 3 Click the Start Search button A list of all active units displays 4 Click the Save button A confirmation message displays 5 Click OK ...

Page 37: ...ow The DeviceInstaller window now lists all of the devices in the group including the unit you are setting up The hardware address and firmware release number for the unit display Figure 9 Devices in a Group Now you can manage configure the unit so that it works with the serial device on the network ...

Page 38: ...b Configuration see Web Manager Page on page 3 4 To configure the unit via a Telnet session click the Telnet to Device icon The Setup Mode window displays For Telnet Configuration see Using a Telnet Connection on page 3 10 3 Continue with the appropriate configuration procedure described in the next chapter Note The Get Configuration icon on the Device Management window allows you to save a config...

Page 39: ...ndows 95 type ARP A at the DOS command prompt to verify that there is at least one entry in the ARP table If the local machine is the only entry ping another IP address on your network to build a new entry in the ARP table the IP address must be a host other than the machine on which you are working Once there is at least one additional entry in the ARP table use the following command to ARP an IP...

Page 40: ... stop bit no flow control 2 To enter Setup Mode cycle the unit s power power off and back on After power up the self test begins and the red Diagnostic LED starts blinking You have one second to enter three lowercase x characters Note The easiest way to enter Setup Mode is to hold down the x key at the terminal or emulation while powering up the unit 3 At this point the screen display is the same ...

Page 41: ...re the unit over the network Use a terminal or terminal emulation program to access the serial port locally The unit s configuration is stored in nonvolatile memory NVRam and is retained without power You can change the configuration at any time The unit performs a reset after the configuration has been changed and stored Note The configuration menus in this section show a typical device and all o...

Page 42: ...earch button A list of all active units displays 3 Click the Save button Click OK for the confirmation message Click the Back button 4 Click the Manage device configuration icon to open the Device Management window 5 For Web configuration click the Web Configuration icon to start your browser A small Web Configuration window appears showing the IP address Go to Web Manager Page on page 3 4 for a s...

Page 43: ...ow opens Go to Using a Telnet Connection on page 3 10 for a summary of the menu selections 7 To Get device configuration information see Get Configuration on page 3 27 Configuration information can be read from a device and saved in a file 8 To Set the configuration of a specific device see Set Configuration on page 3 28 A device can be configured by reading a configuration file and sending the in...

Page 44: ...gure 11 Lantronix Web Manager Web Manager 3 0 has the following buttons Unit Configuration Server Properties Port Properties Factory Settings1 also Factory Settings2 for devices with two serial channels Update Settings Channel 1 also Channel 2 for devices with two serial channels Tech Support FTP Site Back to Web Manager Contact Us 1 Use the menu pushbuttons to navigate to sub pages where you can ...

Page 45: ...on button to display the following dialog box This page contains the Server Configuration and the Port Configuration settings These are static settings read from the device Note The following screen shots represent the web page shown when the device is loaded with cbxw300 cob firmware ...

Page 46: ...r to reload the page Figure 12 Server Properties Configuration on the Web Browser Telnet Password In the Telnet Password field enter a password to prevent unauthorized access to the Setup Mode via a Telnet connection to port 9999 The password is limited to 4 characters An enhanced password setting of 16 characters is available under Security Settings on the Telnet Setup Mode window Note No passwor...

Page 47: ... to Host CTS RTS Hardware UDP Datagram Mode Enable Disable UDP Datagram Type User selectable Incoming Connection Accept unconditional Accept Incoming DTR Inactive Never accept incoming Response Nothing quiet Character response Startup No active startup with any character with active DTR Inactive with CR 0x0D only Manual Connection Autostart Modem Mode Remote IP Address user selectable Remote Port ...

Page 48: ...able Disable Packing Algorithm Enable Disable Idle Time Force transmit 12 ms Force transmit 52 ms Force Transmit 250 ms Force Transmit 5000 ms Trailing Characters None One Two Send Immediate After Sendchars Enable Disable Send Define2 Byte Sequence Enable Disable Send Character 01 User Selectable Send Character 02 User Selectable ...

Page 49: ... Password must be enabled 3 3 4 Technical Support Several buttons provide direct links to Technical Support functions You can use the Tech Support button to link directly to the Lantronix Tech Support web page the FTP Site button will link you to the web page for downloading new firmware manuals and other files The Contact Us button will link you to the Contact Information page 3 3 5 Update Settin...

Page 50: ...s and 9999 2 Click OK 3 The Lantronix Universal Device Server window displays Lantronix Universal Device Server Serial Number 7218033 MAC address 00 20 4A 72 46 71 Software version 04 5 011025 Press Enter to go into Setup Mode 4 To enter the Setup Mode you must press Enter within 5 seconds The configuration settings will appear See Figure 13 Setup Mode Window Note The following line appears only w...

Page 51: ...nload is enabled Port 77Feh is enabled Web Server is enabled Enhanced password is disabled Channel 1 Baudrate 9600 I F Mode 4C Flow 00 Port 10001 Remote IP Adr none Port 00000 Connect Mode C0 Disconn Mode 00 Flush Mode 00 Expert TCP Keepalive 0s not IAP firmware Change Setup 0 Server configuration 1 Channel 1 configuration 5 Expert settings not IAP firmware 6 Security 7 Factory defaults 8 Exit wit...

Page 52: ...oint the screen display is the same as when you use a Telnet connection To continue with a serial port login go to Using a Telnet Connection on page 3 10 3 5 Server Configuration Network Configuration These are the unit s basic network parameters The following parameters are displayed when you select Server configuration IP Address 000 000 000 000 Set Gateway IP Address N Netmask Number of Bits fo...

Page 53: ...ulates the netmask which is displayed in standard decimal dot notation when the saved parameters are displayed for example 255 255 255 0 Table 4 Standard IP Network Netmasks Network Class Host Bits Netmask A 24 255 0 0 0 B 16 255 255 0 0 C 8 255 255 255 0 Table 5 Netmask Examples Netmask Host Bits 255 255 255 252 2 255 255 255 248 3 255 255 255 240 4 255 255 255 224 5 255 255 255 192 6 255 255 255...

Page 54: ... last 6 digits of the MAC address shown on the label on the bottom side of the unit For example if the MAC address is 00 20 4A 12 34 56 then the default DHCP name is C123456 2 Custom DHCP name You can create your own DHCP name on these products If you are using an IP address of 0 0 0 0 then the last option in Server configuration will be Change DHCP device name The Change DHCP device name option w...

Page 55: ... as a modem must agree on a speed or baud rate to use for the serial connection Valid baud rates are 300 600 1200 2400 4800 9600 default 19200 38400 57600 and 115200 bits per second 3 6 2 I F Interface Mode The Interface I F Mode is a bit coded byte that you enter in hexadecimal notation Note See Table 35 Binary to Hexadecimal Conversion Table Table 6 Interface Mode Options I F Mode Option 7 6 5 4...

Page 56: ...erface Mode Settings Common I F Mode Setting Binary Hex RS 232C 8 bit No Parity 1 stop bit 1 0100 1100 4C RS 232C 7 bit Even Parity 1 stop bit 1 0111 1000 78 RS 485 2 Wire 8 bit No Parity 1 stop bit 1 0100 1111 4F RS 422 8 bit Odd Parity 1 stop bit 1 0101 1101 5D 1 The UDS 10 requires you to choose the correct setting in the IF mode ...

Page 57: ...ons Default setting for Port 1 is 10001 Range 0 65535 except for the following reserved port numbers Port Numbers Reserved for 1 1024 Reserved well known ports 9999 Telnet setup 14000 14009 Reserved 30718 Reserved 77FEh 10000 10999 Recommended ports should be used for DeviceComm Manager COM1 COM256 or direct socket connections The port number functions as the TCP UDP source port number for outgoin...

Page 58: ...o active startup 0 0 0 0 With any character 0 0 0 1 With active DTR 1 0 0 1 0 With CR 0x0D only 0 0 1 1 Manual connection 0 1 0 0 Autostart 0 1 0 1 Datagram Type Directed UDP 1 1 0 0 Modem Mode Full Verbose 1 0 1 1 0 Without Echo 0 0 1 1 0 1 character Response 1 0 1 1 1 Manual Connection When you use manual connection you are not required to enter the entire IP address if the IP is already configu...

Page 59: ...with device servers and to use an Ethernet connection instead of a phone call without having to change communications applications and make potentially expensive phone calls To select Modem Mode set the Connect Mode to C6 no echo D6 echo with full verbose or D7 echo with 1 character response Note If the unit is in Modem Mode and the serial port is idle the unit can still accept network TCP connect...

Page 60: ... defined within the unit ATH Hangs up the connection Entered as ATH ATS0 n Enables or disables connections from the network going to the serial port n 0 disables the ability to make a connection from the network to the serial port n 1 9 enables the ability to make a connection from the network to the serial port n 1 9 is invalid ATEn Enables or disables character echo and responses n 0 disables ch...

Page 61: ...minal type setup 1 1 Channel port password 2 1 Hard disconnect 3 0 Disable hard disconnect 1 State LED off with connection 4 1 Disconnect with EOT D 5 1 1 The CoBox will send the Terminal Type upon an outgoing connection 2 A password is required for a connection to the serial port from the network 3 The TCP connection will close even if the remote site does not acknowledge the disconnection 4 When...

Page 62: ... 4 3 2 1 0 Input Buffer Serial to Network Clear with a connection that is initiated from the UDS to the network 1 Clear with a connection initiated from the network to the UDS 1 Clear when the network connection to or from the UDS is disconnected 1 Output Buffer Network to Serial Clear with a connection that is initiated from the UDS to the network 1 Clear with a connection initiated from the netw...

Page 63: ...d Note See Table 35 Binary to Hexadecimal Conversion Table Table 14 Pack Control Options Option 7 6 5 4 3 2 1 0 Idle Time Force transmit 12ms 0 0 Force transmit 52ms 0 1 Force transmit 250ms 1 0 Force transmit 5sec 1 1 Trailing Characters None 0 0 One 0 1 Two 1 0 Send Characters 2 Byte Send Character Sequence 1 Send Immediately After Send chars 1 Idle Time Idle time to Force transmit defines how l...

Page 64: ...to two characters in hexadecimal representation in the parameters sendchar If a character received on the serial line matches one of these characters it is sent immediately along with any awaiting characters to the TCP connection This minimizes the response time for specific protocol characters on the serial line for example ETX EOT etc Setting the first sendchar to 00 disables the recognition of ...

Page 65: ...al connections only not on the Web Manager We recommend that you set security over the dedicated network or over the serial setup If you set parameters over the network Telnet 9999 someone else could capture these settings Disable SNMP N Not with IAP SNMP Community Name public Not with IAP Disable Telnet Setup N Disable TFTP Firmware Update N Disable Port 77FEh N Disable Web Server N Enable Enhanc...

Page 66: ... Lantronix Web site www lantronix com The default setting is the N No option which enables remote configuration You can configure the unit by using DeviceInstaller Web pages Telnet or serial configuration The Y Yes option disables remote configuration and Web pages Note The Yes option disables many of the GUI tools for configuring the Device Server including the embedded Web Page Configuration too...

Page 67: ...y and can be read and saved in a configuration file filename cfg To get the configuration information click the Get Configuration icon button on the Device Management window The following dialog appears The Device IP Address is shown in the first field This is the device selected in the DeviceInstaller main window In the Configuration File field click the Open File button to select a filename for ...

Page 68: ...f a device from a saved file click the Set Configuration button on the Device Management window The following dialog appears The Device IP Address is shown in the first field This is the device selected in the DeviceInstaller main window In the Configuration File field click the Open File button to select a configuration file Click the Set button and the file information is read and stored in the ...

Page 69: ...web pages may not be available with certain vendor protocols Note If you change the protocol to a vendor specific protocol you MUST reference the associated protocol manual for setup and configuration information The menu options shown in this manual are for Standard Tunnel Protocol 4 2 Reloading Protocol Firmware There are several ways to update the unit s internal operational code ROM via Device...

Page 70: ...ftware CD you can use DeviceInstaller to install it 1 Download the updated firmware files from www lantronix com or ftp lantronix com and store them in a subfolder on your computer 2 Click the Start button on the Task Bar and select Programs DeviceInstaller Device Installer The Device Installer window displays Figure 14 Device Installer ...

Page 71: ...ick the Start Search button A list of all active units on the local network displays 5 Click the Save button A confirmation message displays 6 Click OK 7 Click the Back button to return to the Device Installer window The Device Installer window now lists all of the devices in the group including the unit you are updating Figure 16 Devices in a Group ...

Page 72: ... the window When the process is complete the File upgrade successful message displays 12 Click OK Note You can update the unit s Web pages by clicking the Upgrade Web files COB icon Though it would be rare to need to update both the firmware and Web pages at the same time you can do so by clicking the Update the firmware files and Webpages in one step icon 4 2 2 Via TFTP To download new firmware f...

Page 73: ...unit Figure 18 TFTP Dialog Box The unit performs a power reset after the firmware has been loaded and stored 4 2 3 Via Another Unit To distribute firmware to another unit over the network 1 Enter the host unit s Monitor Mode see Monitor Mode on page 7 1 2 Send the firmware to the receiving unit using the SF command where x x x x is the receiving unit s IP address SF x x x x The receiving unit perf...

Page 74: ...that you can load via the serial port Note Do not switch off the power supply during the update A loss of power while reprogramming will result in a corrupt program image and a nonfunctional unit To download firmware from a computer via the unit s serial port 1 Enter Monitor Mode via the serial port see Monitor Mode on page 7 1 2 Download the firmware to the unit using the DL command 3 Select Send...

Page 75: ...ble a serial device with a Lantronix Device Server they can retain their existing PC based applications software without having to undertake the additional time and expense of developing new software Using simple on screen menus users can map up to 255 COM ports directly to IP addresses assigned to Lantronix Device Servers Once COM ports are mapped any networked PC with DeviceComm Manager software...

Page 76: ... drive The CD will automatically start and display the main window If the CD does not launch automatically a Click the Start button on the Task Bar and select Run b Enter your CD drive letter colon backslash devicecomm exe e g D devicecomm exe Figure 19 UDS CoBox Main Window 2 Click the DeviceComm Manager button The installation wizard window displays Respond to the installation wizard prompts Not...

Page 77: ...ther hardware software on your system IDLE An IP address and port number have been associated with the COM port CONNECTED An active TCP IP connection exists between the COM port and the device server 3 Select one of the DISABLED ports by clicking on it and then press the Edit button 4 Select the Enabled check box 5 Type in the IP address of the target device server in the Host section ...

Page 78: ...he situation Network latency varies depending on a number of factors You can get a rough idea of the delay at a given time by pinging the device server from the PC and looking at the time column You may also find the PC command tracert helpful See your Windows OS documentation for more details on these commands Both ping and tracert are DOS prompt commands 8 Click Ok to close the Settings dialog b...

Page 79: ...IP addresses on the network Make sure that your unit s IP address is unique 6 1 1 Technical Support If you are experiencing an error that is not described in this chapter or if you are unable to fix the error you may Check our online knowledge base at www lantronix com support E mail us at E mail support lantronix com Call us at 800 422 7044 Domestic 949 453 7198 International 949 450 7226 Fax Our...

Page 80: ...Telnet to port 9999 Description of the problem Debug report stack dump if applicable Status of the unit when the problem occurred please try to include information on user and network activity at the time of the problem When troubleshooting the following problems make sure that the DR1 is powered up and the Link L LED is lit solid green If the Link LED is not lit then the physical network connecti...

Page 81: ... message Press Enter to go into Setup Mode You may have entered the Ethernet address incorrectly with the ARP command Confirm that the Ethernet address that you entered with the ARP command is correct The Ethernet address may only include numbers 0 9 and letters A F In Windows and usually in Unix the segments of the Ethernet address are separated by dashes In some forms of Unix the Ethernet addres...

Page 82: ...vered in the previous problem or possibly you have Caps Lock on Double check everything in the problem above Confirm that Caps Lock is not on You can ping the UDS CoBox but not Telnet to the UDS CoBox on port 9999 There may be an IP address conflict on your network You are not Telneting to port 9999 The Telnet configuration port 9999 is disabled within the UDS CoBox security settings Turn the UDS ...

Page 83: ...Status LED is blinking consistently then there is a good socket connection If the Status LED is solid green then the socket connection does not exist Use the Connect Mode option C0 for making a connection to the UDS CoBox from the network Use Connect Mode option C1 or C5 for a connection to the network from the UDS CoBox See the full list of Connect Mode Options in the Binary to Hexadecimal chapte...

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Page 85: ...k connections 3 A 0 prompt indicates that you have successfully entered Monitor Mode 7 1 2 Entering Monitor Mode Via the Network Port To enter Monitor Mode using a Telnet connection 4 First establish a Telnet session to the configuration port 9999 The following message appears Serial Number 1400280 MAC address 00 20 4A 14 01 18 Software Version 4 3 xxxxxx Press Enter to go into Setup Mode 5 Type M...

Page 86: ...ork Connection Shows the Device Server s IP configuration RS Reset Resets the Device Server s power SI xxx xxx xxx xxx yyy yyy yyy yyy Send Set IP Address Remotely assign an IP address to a Device Server where xxx xxx xxx xxx is the IP address and yyyy yyy yyyy yyy is the two part identification number at the bottom of the label converted to decimal and written twice QU Quit Exit diagnostics mode ...

Page 87: ...with the F7 block below F7 Firmware Information First 16 bytes of the firmware image and 4 bytes device information and serial number The first 16 bytes of the firmware image contain the software type offset 4 5 and checksum offset 14 15 The last two bytes of the device information contain the serial number F8 Query for Setup Record None The Device Server responds with the F9 block below F9 Config...

Page 88: ... the IP address of the Device Server if is on the local network and the serial number is known Remember broadcasts are only heard on the subnet on which they are generated No reply is sent by the Device Server which restarts using the new IP address after the block is received Example all in Hex 49 50 2D 63 45 54 55 50 00 00 2A 12 81 00 01 02 IP address of the node with serial number 42 18 set to ...

Page 89: ...000000C00000000000000000000000000000000000 000049 1800601000000000000000000000000000000000000000000000000078 00000001FF Figure 20 Sample Setup Record in Intel Hex Format 8 2 1 Acquiring a Valid Setup Record There are a number of ways to acquire a valid setup record Copy the setup record of a properly configured Device Server via Monitor Mode easiest method Request the setup record of a properly co...

Page 90: ...tings take effect To build the setup record in software 1 Create a 120 byte setup record 2 Convert it to an Intel Hex record see The Intel Hex Format on page 8 5 3 Copy the setup record into a text file and save it for future use To request the setup record of a properly configured Device Server via UDP 1 Configure a Device Server with the desired parameters and place it on the network 2 From a ho...

Page 91: ...erver see Network Configuration using UDP on page 8 1 Note The Device Server responds with the FB datagram Refer to the table 8 2 3 The Intel Hex Format With this format 8 bit binary data can be sent and received as ASCII text The transmission is blocked in records and every record has its own checksum The record begins with a colon and consists of a block length 2 character Hex a 16 bit address 4...

Page 92: ... line and taking the two s complement of the sum Note Do not include the leading colon or the checksum byte in the sum Example 0300300002337A1E Record length 03 3 bytes of data Address 0030 the 3 bytes will be stored at 0030 0031 and 0032 Record Type 00 normal data Data 02 33 7A Checksum 1E 03 00 30 00 02 33 7A E2 The two s complement of E2 is 1E See Calculating the Two s Complement below 8 2 5 Ca...

Page 93: ...x x x 04 Reserved 0 05 Flag BYTE Bit 7 Reserved 0 Bit 6 Set 1 for AUI 0 for 10BASE T CoBox Micro only Bits 5 0 Reserved 0 06 Number of host bits for subnetting if 0 matching standard netmask for Class A B C is used 07 Reserved 0 08 11 Telnet configuration password 0 if not used 12 15 Gateway IP address 0 0 0 0 if not used 16 63 48 byte Channel 1 parameters parameter setup Channel 1 see Table E 4 C...

Page 94: ...el 24 27 Remote IP address low high low high 28 Connect Mode see Table 27 Connect Mode Options 29 Disconnect Mode see Table 28 Disconnect Mode Options 30 Disconnect w inactivity time out minutes 00 if unused 31 Disconnect w inactivity time out seconds 00 if unused 32 33 Characters to trigger send immediately sendchar 34 Flush mode see Table 29 Flush Mode Options 35 Pack Control see Table 30 Pack C...

Page 95: ...it 0 1 2 Stop bits 1 1 1 The UDS 10 requires you to choose the correct setting in the IF mode The following table demonstrates how to build some common Interface Mode settings Table 24 Common Interface Mode Settings Option Binary Hex RS 232C 8 bit No Parity 1 stop bit 1 0100 1100 4C RS 232C 7 bit Even Parity 1 stop bit 1 0111 1000 78 RS 485 2 Wire 8 bit No Parity 1 stop bit 1 0100 1111 4F RS 422 8...

Page 96: ... 06 300 07 115200 08 57600 09 8 3 4 Flow Control Flow control sets the local handshaking method for stopping serial input output Generally flow control is not required if the connection is used to pass a blocked protocol with block sizes less than 1k ACK NAK and or speeds of 19200 or less Use the following table to select Flow Control options Table 26 Flow Control Options Option Hex No flow contro...

Page 97: ...tion Never accept incoming 0 0 0 Accept incoming with DTR 0 1 0 Accept unconditional 1 1 0 Response Nothing quiet 0 Character response C conn D disconn N unreachable 1 Startup No active startup 0 0 0 0 With any character 0 0 0 1 With active DTR 1 0 0 1 0 With CR 0x0D only 0 0 1 1 Manual connection 0 1 0 0 Autostart 0 1 0 1 Datagram Type Directed UDP 1 1 0 0 Modem Mode Full Verbose 1 0 1 1 0 Withou...

Page 98: ...ction 2 A password is required for a connection to the serial port from the network 3 The TCP connection will close even if the remote site does not acknowledge the disconnection 4 When there is a network connection to or from the serial port the state LED will turn off instead of blink 5 When Ctrl D or Hex 04 are detected the connection is dropped Both Telnet mode and Disconnect with EOT must be ...

Page 99: ...1 Output Buffer Network to Serial Clear with a connection that is initiated from the UDS to the network 1 Clear with a connection initiated from the network to the UDS 1 Clear when the network connection to or from the UDS is disconnected 1 Alternate Packing Algorithm Pack Control Enable 1 Note See Table 35 Binary to Hexadecimal Conversion Table 8 3 8 Pack Control Alternate packing algorithm setti...

Page 100: ...twork Portion of Address Class A First byte 2nd 3rd and 4th bytes are the host Class B First 2 bytes 3rd and 4th bytes are the host Class C First 3 bytes 4th byte is the host In most network examples the host portion of the address is set to zero Table 32 Available IP Addresses Class Reserved Available A 0 0 0 0 127 0 0 0 1 0 0 0 to 126 0 0 0 B 128 0 0 0 191 255 0 0 128 1 0 0 to 191 254 0 0 C 192 ...

Page 101: ...ning for for every station 192 168 0 255 Network and broadcast addresses must not be used as a host address for example 192 168 0 0 identifies the entire network and 192 168 0 255 identifies the broadcast address IP Subnet Mask An IP subnet mask divides IP address differently than the standards defined by the classes A B and C An IP subnet mask defines the number of bits to be taken from the IP ad...

Page 102: ... IP address If your network is connected or will be connected to the Internet or if you intend to operate the Device Server on an intranet you should use one of the reserved sub networks Consult your network administrator with questions about IP address assignment 8 4 7 Network RFCs For more information about IP addresses refer to the following documents which can be located on the World Wide Web ...

Page 103: ... from 0 to F which are represented as 0 9 A for 10 B for 11 etc To convert a binary value for example 0010 0011 to a hexadecimal representation the upper and lower four bits are treated separately resulting in a two digit hexadecimal number in this case 4C Use the following table to convert values from binary to hexadecimal Table 35 Binary to Hexadecimal Conversion Table Decimal Binary Hex 0 0000 ...

Page 104: ...utostart 15 Never Character UDP 1C With DTR None quiet No active startup 40 With DTR None quiet Any character 41 With DTR None quiet Active DTR 42 With DTR None quiet CR 0x0D 43 With DTR None quiet Manual connection 44 With DTR None quiet Autostart 45 With DTR None quiet UDP 4C With DTR Character No active startup 50 With DTR Character Any character 51 With DTR Character Active DTR 52 With DTR Cha...

Page 105: ...r Autostart Hostlist 35 Never Character UDP Hostlist N A With DTR None quiet No active startup Hostlist N A With DTR None quiet Any character Hostlist 61 With DTR None quiet Active DTR Hostlist 62 With DTR None quiet CR 0x0D Hostlist 63 With DTR None quiet Manual connection Hostlist N A With DTR None quiet Autostart Hostlist 65 With DTR None quiet UDP Hostlist N A With DTR Character No active star...

Page 106: ...l connection Hostlist N A Unconditionally Character Autostart Hostlist F5 Unconditionally Character UDP Hostlist N A The following connect mode options are for when you use modem emulation Table 37 Connect Mode Options for Modem Emulation Accept Incoming Connections Response Hex Never Echo 16 Never Without echo 6 Never 1 character response 7 With DTR Echo 56 With DTR Without echo 46 With DTR 1 cha...

Page 107: ...ble Enable B0 Enable Enable Enable C0 Enable Enable Enable Enable D0 Enable Enable Enable Enable E0 Enable Enable Enable Enable Enable F0 Enable Enable 1 Enable Enable Enable 11 Enable Enable Enable 21 Enable Enable Enable Enable 31 Enable Enable Enable 41 Enable Enable Enable Enable 51 Enable Enable Enable Enable 61 Enable Enable Enable Enable Enable 71 Enable Enable Enable 81 Enable Enable Enabl...

Page 108: ... Enable Enable Enable Disable D8 Enable Enable Disable Enable E8 Enable Enable Enable Disable Enable F8 Disable Enable 9 Enable Disable Enable 19 Disable Enable Enable 29 Enable Disable Enable Enable 39 Enable Disable Enable 49 Enable Enable Disable Enable 59 Enable Disable Enable Enable 69 Enable Enable Disable Enable Enable 79 Enable Disable Enable 89 Enable Enable Disable Enable Enable 99 Enabl...

Page 109: ...0 Active connection Enable 90 Passive connection Enable A0 Active connection Passive connection Enable B0 Disconnect Enable C0 Active connection Disconnect Enable D0 Passive connection Disconnect Enable E0 Active connection Passive connection Disconnect Enable F0 Active connection 1 Active connection Active connection 11 Passive connection Active connection 21 Active connection Passive connection ...

Page 110: ...assive connection 32 Disconnect Passive connection 42 Active connection Disconnect Passive connection 52 Passive connection Disconnect Passive connection 62 Active connection Passive connection Disconnect Passive connection 72 Passive connection Enable 82 Active connection Passive connection Enable 92 Passive connection Passive connection Enable A2 Active connection Passive connection Passive conn...

Page 111: ... Active connection Passive connection Enable B3 Disconnect Active connection Passive connection Enable C3 Active connection Disconnect Active connection Passive connection Enable D3 Passive connection Disconnect Active connection Passive connection Enable E3 Active connection Passive connection Disconnect Active connection Passive connection Enable F3 Disconnect 4 Active connection Disconnect 14 P...

Page 112: ...connection Disconnect 55 Passive connection Disconnect Active connection Disconnect 65 Active connection Passive connection Disconnect Active connection Disconnect 75 Active connection Disconnect Enable 85 Active connection Active connection Disconnect Enable 95 Passive connection Active connection Disconnect Enable A5 Active connection Passive connection Active connection Disconnect Enable B5 Dis...

Page 113: ...nnection Disconnect Enable A6 Active connection Passive connection Passive connection Disconnect Enable B6 Disconnect Passive connection Disconnect Enable C6 Active connection Disconnect Passive connection Disconnect Enable D6 Passive connection Disconnect Passive connection Disconnect Enable E6 Active connection Passive connection Disconnect Passive connection Disconnect Enable F6 Active connecti...

Page 114: ...tive connection Active connection Passive connection Disconnect Enable 97 Passive connection Active connection Passive connection Disconnect Enable A7 Active connection Passive connection Active connection Passive connection Disconnect Enable B7 Disconnect Active connection Passive connection Disconnect Enable C7 Active connection Disconnect Active connection Passive connection Disconnect Enable D...

Page 115: ...22 485 7 No 2 C9 RS 422 485 7 Even 1 79 RS 422 485 7 Even 2 F9 RS 422 485 7 Odd 1 59 RS 422 485 7 Odd 2 D9 RS 422 485 8 No 1 4D RS 422 485 8 No 2 CD RS 422 485 8 Even 1 7D RS 422 485 8 Even 2 FD RS 422 485 8 Odd 1 5D RS 422 485 8 Odd 2 DD RS 422 485 2 Wire 7 No 1 4B RS 422 485 2 Wire 7 No 2 CB RS 422 485 2 Wire 7 Even 1 7B RS 422 485 2 Wire 7 Even 2 FB RS 422 485 2 Wire 7 Odd 1 5B RS 422 485 2 Wir...

Page 116: ...o 12ms 10 2 Byte Sequence No 52ms 11 2 Byte Sequence No 250ms 12 2 Byte Sequence No 5sec 13 2 Byte Sequence 1 12ms 14 2 Byte Sequence 1 52ms 15 2 Byte Sequence 1 250ms 16 2 Byte Sequence 1 5sec 17 2 Byte Sequence 2 12ms 18 2 Byte Sequence 2 52ms 19 2 Byte Sequence 2 250ms 1A 2 Byte Sequence 2 5sec 1B 1 Byte Sequence No 12ms Yes 20 1 Byte Sequence No 52ms Yes 21 1 Byte Sequence No 250ms Yes 22 1 By...

Page 117: ...after Sendcharacter Hex 2 Byte Sequence No 250ms Yes 32 2 Byte Sequence No 5sec Yes 33 2 Byte Sequence 1 12ms Yes 34 2 Byte Sequence 1 52ms Yes 35 2 Byte Sequence 1 250ms Yes 36 2 Byte Sequence 1 5sec Yes 37 2 Byte Sequence 2 12ms Yes 38 2 Byte Sequence 2 52ms Yes 39 2 Byte Sequence 2 250ms Yes 3A 2 Byte Sequence 2 5sec Yes 3B ...

Page 118: ......

Page 119: ...s 1 x x x to 127 x x x Only 127 different networks of this class exist These have a very large number of potential connected devices up to 16 777 216 Example 10 0 0 1 network 10 host 0 0 1 10 2 Class B Network IP address 128 0 x x to 191 255 xxx xxx These networks are used for large company networks Every network can consist of up to 65 534 devices Example 172 1 3 2 network 172 1 host 3 2 10 3 Cla...

Page 120: ...sk is used to divide the IP address differently from the standard defined by classes A B C A netmask defines how many bits from the IP address are to be taken as the network section and how many bits are to be taken as the host section When the number of host bits is entered the UDS 10 calculates the netmask The netmask is displayed in standard decimal dot notation Network Bits Host Bits Netmask C...

Page 121: ...n an intranet use one of the subnetworks below These network numbers have been reserved for such networks If you have any questions about IP assignment consult your Network Administrator Class A 10 x x x Class B 172 16 x x Class C 192 168 0 x 10 8 Network RFCs For more information regarding IP addressing see the following documents These can be located on the World Wide Web using one of the direct...

Page 122: ......

Page 123: ... a 10 100 Ethernet device to interpret the speed or duplex mode of the attached device and to adjust to that rate Official term is Auto Negotiation in Clause 28 of the IEEE 802 3u standard AUI Attachment Unit Interface A 15 pin shielded twisted pair Ethernet cable used optionally to connect between network devices and a MAU Autobaud Automatic determination and matching of transmission speed Backbo...

Page 124: ...ff The binary number system uses only ones and zeros Bit The smallest unit of data processing information A bit or binary digit assumes the value of either 1 or 0 Block A block is a variable size piece of memory that a task can acquire Blocks are allocated from heaps Related Buffer heap BNC A standardized connector used with Thinnet and coaxial cable BOOTP A TCP IP network protocol that lets netwo...

Page 125: ...el The data path between two nodes CHAP Challenge Handshake Authentication Protocol Authentication scheme for PPP where the password not only is required to begin connection but also is required during the connection failure to provide correct password during either login or challenge mode will result in disconnect Coaxial Cable An electrical cable with a solid wire conductor at its center surroun...

Page 126: ...e It is a medium independent link level communications facility on top of the Physical layer and is divided into two sublayers medium access control MAC and logical link control LLC DHCP Short for Dynamic Host Configuration Protocol a protocol for assigning dynamic IP addresses to devices on a network With dynamic addressing a device can have a different IP address every time it connects to the ne...

Page 127: ...as a terminal server or printer End Node A node such as a PC that can only send and receive information for its own use It cannot route and forward information to another node Ethernet The most popular LAN technology in use today The IEEE standard 802 3 defines the rules for configuring an Ethernet network It is a 10 Mbps CSMA CD baseband network that runs over thin coax thick coax twisted pair or...

Page 128: ...ing rate is the time that it takes the device to execute all of the steps Flash ROM See ROM Framing Dividing data for transmission into groups of bits and adding a header and a check sequence to form a frame FTP File Transfer Protocol a TCP IP protocol for file transfer Full Duplex Independent simultaneous two way transmission in both directions as opposed to half duplex transmission Gateway A dev...

Page 129: ...d is executed independently without any knowledge of the commands that came before it This is the main reason that it is difficult to implement Web sites that react intelligently to user input This shortcoming of HTTP is being addressed in a number of new technologies including ActiveX Java JavaScript and cookies IEEE 802 3 The IEEE Institute of Electrical and Electronic Engineers standard that de...

Page 130: ...tion Each layer performs services for the layer above it Jabber Network error caused by an interface card placing corrupted data on the network Or an error condition due to an Ethernet node transmitting longer packets than allowed Kbps Kilobits per second Kermit A popular file transfer and terminal emulation program LAN Local Area Network a data communications system consisting of a group of inter...

Page 131: ... Mbps Megabits per second MIB Management Information Base a database of network parameters used by SNMP and CMIP Common Management Information Protocol to monitor and change network device settings It provides a logical naming of all information resources on the network that are pertinent to the network s management MII Media Independent Interface New standard developed for Fast Ethernet in IEEE 8...

Page 132: ... Multiplexer A device that allows several users to share a single circuit It funnels different data streams into a single stream At the other end of the communications link another multiplexer reverses the process by splitting the data stream back into the original streams Multiplexing Transmitting multiple signals simultaneously on a single channel Multiport Repeater A repeater either standalone ...

Page 133: ...lems NIC Network Interface Card an adapter card that is inserted into a computer and contains the necessary software and electronics to enable the station to communicate over the network Node Any intelligent device connected to the network This includes terminal servers host computers and any other devices such as printers and terminals that are directly connected to the network A node can be thou...

Page 134: ...odes only or a configuration requiring a separate physical connection between each pair of nodes Port The physical connector on a device enabling the connection to be made Port Multiplier A concentrator providing connection to a network for multiple devices PostScript A printer display protocol developed by Adobe Corp PostScript is an actual printing and programming language to display text and gr...

Page 135: ...es while restoring signal timing and waveforms Ring A network topology in which the nodes are connected in a closed loop Data is transmitted from node to node around the loop always in the same direction RMON SNMP based standard for reporting various network conditions RMON has 10 different management groups which provide detailed information about a network Rlogin Rlogin is an application that pr...

Page 136: ...gments are bound together in a single collision domain Hubs produce this type of configuration where only one node can transmit at a time SLIP Serial Line Internet Protocol a protocol for running TCP IP over serial lines SNA Systems Network Architecture IBM s layered protocols for mainframe communications SNMP Simple Network Management Protocol allows a TCP IP host running an SNMP application to q...

Page 137: ... addresses T Connector A T shaped device with two female and one male BNC connectors TCP IP Transmission Control Protocol TCP and Internet Protocol IP are the standard network protocols in UNIX environments They are almost always implemented and used together and called TCP IP Telnet Telnet is an application that provides a terminal interface between hosts using the TCP IP network protocol It has ...

Page 138: ...hput The amount of data transmitted between two points in a given amount of time e g 10 Mbps Token The character sequence or frame passed in sequence from node to node to indicate that the node controlling it has the right to transmit for a given amount of time Token Ring Developed by IBM this 4 or 16 Mbps network uses a ring topology and a token passing access method Topology The arrangement of t...

Page 139: ...l versions exist e g the Berkeley version UTP Unshielded twisted pair one or more cable pairs surrounded by insulation UTP is commonly used as telephone wire Wide Area Network WAN A network using common carrier transmission services for transmission of data over a large geographical area Workgroup Switching Configuration in which a number of users are connected to an Ethernet network via a switch ...

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