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USER GUIDE

XL-12000S

Managed, High-Speed Network Modem

YSTEMS

Содержание XL-12000S

Страница 1: ...USER GUIDE XL 12000S Managed High Speed Network Modem TUT SYSTEMS ...

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Страница 3: ...e their quality their merchantability non infringement or oth erwise Exclusive Remedies The remedies provided herein are the buyer s sole and exclusive remedies Tut Systems shall not be liable for any direct indirect special incidental or consequential damages whether based upon contract tort or any other legal theory Warranties apply only to original purchaser or end user and cannot be assigned o...

Страница 4: ...e the suitability of each product for their specific application Tut Systems obligations regarding the use or application of its products shall be limited to those commitments to the purchaser set forth in its Standard Terms and Conditions of Sale for a deliv ered product Published by Tut Systems Inc 2495 Estand Way Pleasant Hill CA 94523 3911 925 682 6510 fax 925 682 4125 www tutsys com Copyright...

Страница 5: ...4 7 2 2 User Interface Keyboard Commands 26 7 2 3 Procedures for Initial Configuration 28 7 2 3 1 HyperTerminal 28 7 2 3 2 Login Display 30 7 2 3 3 Main Menu Display 32 7 2 3 4 Modem Management 32 7 2 3 5 Telnet Setup 35 7 2 3 6 Modem Configuration 35 7 2 3 7 Password 39 8 0 Advanced Modem Features 41 8 1 SNMP Management 41 8 2 Modem DHCP Relay Agent 43 8 3 Upgrade Software 44 9 0 Modem Statistics...

Страница 6: ...Routing Example Two 22 Using a Router and Router Combination Figure 7 6 Bridge Non IP 24 Figure 7 7 Serial Session Version ID Screen 30 Figure 7 8 Login Display Screen 31 Figure 7 9 Main Menu Screen 32 Figure 7 10 Modem Management Screen 33 Figure 7 11 Modem Configuration Screen 36 Figure 7 12 Password Change Screen 39 Figure 8 1 SNMP Management Screen 42 Figure 8 2 DHCP Relay Agent Screen 43 Figu...

Страница 7: ...reen 42 Table 8 2 Specific Field Information for the DHCP Relay Agent Screen 44 Table 8 3 Specific Field Information for the Upgrade Software Screen 46 Table 9 1 Specific Field Information for the Modem Status Screen 49 Table 9 2 Specific Field Information for the Modem IP Packet 50 Statistics Screen Table A 1 RJ 45 10Base T Ethernet Connector on Rear of Modem 58 Table A 2 RJ 11 DSL Line Connector...

Страница 8: ...XL 12000S MANAGED HIGH SPEED NETWORK MODEM USER GUIDE vi TUT SYSTEMS ...

Страница 9: ...bscriber Line DSL trans mission technology to deliver data at 2 Mbps The XL 12000S is designed for easy installation Front panel LEDs provide status and operational information The modem is ideally suited for connecting LANs in a campus environment where LANs may be spread out over two miles The XL 12000S units function as a pair one as Master and the other as Slave Once the modem is installed and...

Страница 10: ...60 Hz wall transformer Power Consumption 5 Watts Operating Temperature 5 to 55 C Storage Temperature 40 to 70 C Relative Humidity 5 to 90 non condensing Compliance UL CSA CE FCC Part 15 Class A Software SNMPv1 agent supports rfc 1213 rfc 1493 and Tut Enterprise MIB Telnet Spanning Tree Protocol STP Bridging Static Routing DHCP Relay Agent XL 12000S MANAGED HIGH SPEED NETWORK MODEM USER GUIDE 2 TUT...

Страница 11: ...Modem XL 12000S User Manual RJ 45 10Base T Straight through Cable RJ 11 DSL Line Cable Wall Transformer w Lightning Protection XL 12000S Enterprise SNMP MIB Diskette You will also need a PC with a serial port and a serial cable to connect to the modem s point of connection which is an RS 232 Console port DB 9 female 3 0 WHAT S IN THE BOX TUT SYSTEMS 3 ...

Страница 12: ...he modem will allow this cable to be used like a cross over cable Figure 4 1 Figure 4 1 RJ 45 10Base T Straight through Cable 2 RJ 11 DSL Line cable A cable with RJ 11 connectors at each end RJ 11 connectors have four contacts and are smaller than the RJ 45 connectors which have eight contacts The diameter of the RJ 11 cable is smaller than the RJ 45 cable This cable is used to connect the modem t...

Страница 13: ...t device PC server workstation or hub as shown in Figure 4 3 If connecting to a PC server or workstation set the Ethernet connection switch on the back of the modem to the Crossed position If connecting to a 10Base T hub set the switch to Normal 4 Connect the RJ 11 DSL Line cable from the DSL connector on the modem to the telephone jack as shown in Figure 4 3 Verify that you have a telephone line ...

Страница 14: ...se with either a hub or node XL 12000S MANAGED HIGH SPEED NETWORK MODEM USER GUIDE 6 TUT SYSTEMS 4 0 INSTALLATION 10Base T Cable Switch in Normal Hub Position RJ 11 RJ 45 10BASE T ETHERNET 10BASE T LINK CONSOLE 12VDC RS 232 DSL ETHERNET CONNECTION NORMAL CONNECT TO HUB CROSSED CONNECT TO NODE XL 12000S ...

Страница 15: ...forms a diagnostic self test and performs software decompression After the modem completes its self test the LED will extinguish indicating that the modem is ready for normal operations The Status LED will flash red when software is being downloaded during subsequent maintenance activity Steady red indicates unit failure refer to the Troubleshooting section of this manual DSL Link A flashing DSL l...

Страница 16: ... S L T X S T A T U S D S L L I N K DSL RX Flashing Green On when receiving data DSL LINK Steady Green Normal link Flashing Green Linking about one minute Off No link STATUS Flashing Red Power up self test or software download in progress Off Normal condition Steady Red Board failure Contact Tut Systems Customer Support DSL TX Flashing Green On when transmitting data POWER Blue TUT SYSTEMS ...

Страница 17: ...ing a management session Figure 5 2 XL 12000S Rear Panel Power Connection 10Base T Link Green Indicates valid 10Base T link Flashing Green Indicates activity Off No link 10Base T Ethernet Connection To connect to a PC server workstation or hub DSL Connector To the telephone line for the remote modem Ethernet Connection Normal Select Normal if connecting to a hub Crossed Select Crossed if connectin...

Страница 18: ... the 10Base T Link green LED on the rear panel is illuminated If the unit is not connected to an Ethernet 10Base T source e g computer this LED will illuminate momentarily on power up and then extinguish When properly connected the 10Base T Link LED will be lit continuously and flash to indicate traffic 4 Immediately upon power up the modem will begin its boot up routine The Status LED flashes red...

Страница 19: ...ter Windows 95 or Windows 98 7 1 Quick Start The Quick Start option which only requires configuring the modem which will be used as the master unit takes advantage of the default configuration programmed into the XL 12000S The default settings provide the following functionality Bridge Mode The XL 12000S will function as a bridge con necting two independent segments This mode allows the modem to p...

Страница 20: ...he COM port e g COM1 number that you will be connecting to and set the following parameters 9 600 baud No parity 8 data bits 1 stop bit None Press OK h Under the File Properties Settings Set Function Arrow and Ctrl keys to act as Terminal Keys Emulation Auto detect Backscroll buffer lines 500 Press OK i Set hardware flow control to none You can set the display window to full screen size to avoid c...

Страница 21: ...blank make sure you have entered the correct settings in step seven above Verify that you are using the correct cable and have a good connection If you are still unable to view the Login Display screen refer to section 10 0 Troubleshooting Figure 7 1 Serial Session Version ID Screen 2 When Login is displayed press Enter Ignore the request for a password Screen shots for this process are contained ...

Страница 22: ...units in the pair as a bridge or a router There are four bridging routing options In many cases networking needs can be met with basic bridg ing This is option one Some of the more complex network configu rations require options two through four Other parts of this section describe how to configure and manage the modem After configuring your XL 12000S modems you will want to secure it with a passw...

Страница 23: ... packets Examples of non IP include Novell s IPXTM and Apple s AppleTalkTM Bridging Example One Basic Bridging This example shows how the XL 12000S connects two LANs in sep arate buildings Two types of data traffic will be sent between LANs Broadcast packets which are packets sent to all LAN devices Direct packets which are sent to one or several LAN devices Direct packets will only cross the DSL ...

Страница 24: ...0 The Default Gateway field will be set to a valid default gateway The Master Slave mode in the Modem Configuration screen is set to Master The Routing Bridging field in the Modem Configuration screen will be set to bridging For Modem 2 The LAN IP address field in the Modem Management screen will be set to 192 168 3 2 The Subnet Mask field in the Modem Management screen will be set to 255 255 255 ...

Страница 25: ...ocol STP by creating redundant loops in the network This way if one link becomes unavailable STP uses the other path to reach the destination This configuration is ideal when network avail ability is critical Figure 7 3 Bridging Example Two Advanced Bridging 192 168 1 1 LAN Ethernet Hub Modem 3 TUT SYSTEMS 192 168 1 4 LAN Modem 4 TUT SYSTEMS Administration Building 192 168 1 7 LAN Ethernet Hub Mod...

Страница 26: ...s set to Y Default mode The Master Slave field in the Modem Configuration screen will be set to Master The Routing Bridging field in the Modem Configuration screen will be set to bridging For Modem 2 The LAN IP address field in the Modem Management screen will be set to 192 168 1 7 The Subnet Mask field in the Modem Management screen will be set to 255 255 255 0 The Default Gateway field in the Mo...

Страница 27: ...reen will be set to Slave The Routing Bridging field in the Modem Configuration screen will be set to bridging For Modem 4 The LAN IP address field in the Modem Management screen will be set to 192 168 1 4 The Subnet Mask field in the Modem Management screen will be set to 255 255 255 0 The Default Gateway field in the Modem Management screen will be set to a valid default gateway The Enable STP f...

Страница 28: ... external gateway router to include the network changes made when the modems are incorporated as routers Operators are urged to consult their router vendor s documentation to configure the routing table for their external gateway router Routing Example One Using a Router and Bridge Combination This example shows how to use one XL 12000S as a router and another as a bridge Using this configuration ...

Страница 29: ...tion screen will be set to Master The Routing Bridging field in the Modem Configuration screen will be set to ip_routing_only For Modem 2 Bridge The LAN IP address field in the Modem Management screen will be set to 192 168 3 2 The Subnet Mask field in the Modem Management screen will be set to 255 255 255 0 The Default Gateway field will be set to 192 168 3 1 The Master Slave mode in the Modem Co...

Страница 30: ... Combination For Modem 1 The LAN IP address field in the Modem Configuration screen will be set to 192 168 2 2 The LAN Subnet Mask field in the Modem Configuration screen will be set to 255 255 255 0 The DSL IP address field in the Modem Configuration screen will be set to 192 168 3 1 The DSL Subnet Mask field in the Modem Configuration screen will be set to 255 255 255 0 The Master Slave field in...

Страница 31: ...aster Slave field in the Modem Configuration screen will be set to Slave The Routing Bridging field in the Modem Configuration screen will be set to ip_routing_only The static routing table fields in the Modem 2 Configuration would be Destination Mask Gateway Hops 192 168 2 0 255 255 255 0 192 168 3 1 1 3 Bridge Non IP This selection will enable the modem to route IP traffic and bridge non IP traf...

Страница 32: ...ddress field in the Modem Configuration screen will be set to 192 168 3 1 The DSL Subnet Mask field in the Modem Configuration screen will be set to 255 255 255 0 The Master Slave field in the Modem Configuration screen will be set to Master XL 12000S MANAGED HIGH SPEED NETWORK MODEM USER GUIDE 24 TUT SYSTEMS 7 0 CONFIGURE THE MODEM Ethernet Hub 192 168 2 2 LAN 192 168 3 1 DSL 192 168 3 2 DSL Appl...

Страница 33: ...creen will be set to Slave The Routing Bridging field in the Modem Configuration screen will be set to bridge_non_ip The static routing table fields in the Modem 2 Configuration would be Destination Mask Gateway Hops 192 168 2 0 255 255 255 0 192 168 3 1 1 4 Block Packets This selection disables routing and bridging and blocks all user traffic This option allows communication with the modem for di...

Страница 34: ...ill use alphabetical letters from the Main Menu display e g type C to navigate to the Modem Configuration screen Press Ctrl X to return to the Main Menu without changing any setting Cursor Movement and Data Entry Cursor movement is via the tab key and the arrow keys The Tab and arrow keys move the cursor from one field to another on the same screen Pressing the up arrow moves the cursor to an inpu...

Страница 35: ...e remaining characters to the left there is no way of moving them to the right Ctrl A Takes you to the beginning of the current field Ctrl E Takes you to the end of the current field Ctrl W Clears the active input field Ctrl L Refreshes the screen Tab Moves the cursor to the beginning of the next field Esc Tab Moves the cursor to the beginning of the previous field Ctrl X Returns to Main Menu with...

Страница 36: ...ws you how to configure one unit as Master and the other as Slave and ends with configuring each modem as a router or as a bridge This section also shows how to open a Telnet session and how to set a password 7 2 3 1 HyperTerminal This section assumes you can perform terminal emulation such as HyperTerminal described here or another emulation package Consult your operating system user guide for mo...

Страница 37: ...ion if you intend to use this PC and serial connection in the future to configure other modems 11 Connect the user provided straight through serial cable to local ly connect your PC to the modem see section 4 0 Installation for more information 12 Go to the Call Menu and select Connect You will see Figure 7 7 13 To verify that you have correctly configured your serial port press the Enter key and ...

Страница 38: ...er login and is displayed during login The system login time is one minute If this time is exceeded before keyboard activity begins the session will be closed The message Login time exceeded will be displayed and you will have to press Enter to connect to the XL 12000S If you were connected via a Telnet session you will have to reconnect New XL 12000S modems are not password protected until you as...

Страница 39: ...of your modem Failed Login Attempts Once your system is password protected and a user enters an incor rect password the user will not be able to access the system Failed login attempts from a console or Telnet session are counted and the session is terminated after five attempts You will be unable to access the system for a period of 60 seconds Figure 7 8 Login Display Screen ...

Страница 40: ... describes the configuration that is required to initial ize your XL 12000S The purpose is to set the modem s IP address default gateway and subnet mask Prior to completing this proce dure you will only be able to access your modem using a serial con sole connection After you complete this procedure you can access your system using Telnet or SNMP in addition to the console port Access the Modem Ma...

Страница 41: ...fault Gateway field Type the IP address of the modem s default gateway 4 Entries may be made into optional fields at this time See Table 7 2 for detailed descriptions of each field 5 Press Enter and modem will reboot 6 After the modem reboots you can Telnet to the modem from the LAN interface to complete configuration If you choose to continue from the console port skip the Telnet set up section w...

Страница 42: ...nactivity Time out You can enter a value for time out The modem automatically logs an operator off the network if inactivity exceeds this operator defined time out setting The default is 10 minutes Entering a zero 0 disables this feature which means the session will keep running until an operator terminates it Enable STP Enable or disable Spanning Tree Protocol for bridging purposes The default is...

Страница 43: ...modem and a network device by pinging the LAN address of the modem Open a Telnet session using the IP address of the modem that you set in the LAN IP Address field in the Modem Management screen The user interface for a Telnet or serial connection is the same The first screen is the Login Display screen Press Enter to proceed to the Main Menu 7 2 3 6 Modem Configuration This section describes conf...

Страница 44: ...ore may already have an entry 3 Tab to the Routing Bridging field Enter numeric keys 1 4 based on the network planning previously done see section 7 2 1 4 Tab to the LAN IP Address field Confirm that the entry is the value you entered previously in section 7 2 3 4 Necessary for remote management or if Bridge Routing options 2 or 3 are selected 5 Tab to the DSL IP address field If option 1 or 4 was...

Страница 45: ...aster and the other to be Slave Name A name may be assigned to the modem Up to 14 characters are allowed including underscore characters but do not use spaces or these characters The default setting for name is XL 12000S Network Parameters MAC Address Media Access Control MAC address of the modem LAN interface Routing Bridging Enter 1 4 to make a selection 1 Bridging for bridge mode only 2 IP Rout...

Страница 46: ...address can also be used for remote management when opening a Telnet session to the modem Static Routing Table Destination IP address of the destination host or network A destination address of 0 0 0 0 designates the default gateway entry Mask Subnet mask address A mask selected by the Network Administrator to provide a specific subset of address numbers Gateway IP Address of the next router which...

Страница 47: ...the main menu press P to access the password screen 2 Tab to the New Password field Enter a new password A pass word may have up to 32 alphanumeric characters New pass word characters are case sensitive and special characters are allowed 3 Tab to the Retype New Password field and retype the password to confirm the change 4 To save your new password press Enter and wait while the configuration is u...

Страница 48: ...nformation for the Password Change Screen FIELD DESCRIPTION Old password Type in the current password If the modem has no password tab to the New Password field New password Type in the new password A password may have up to 32 alphanumeric characters New password characters are case sensitive and special characters are allowed Retype new password Retype the password to confirm the change Note If ...

Страница 49: ...MPv2 and CMIP The Practical Guide to Network Management Standards by William Stallings Addison Wesley You must first enable SNMP from the Modem Management screen see Section 7 2 3 4 before proceeding to set up SNMP configura tion parameters on the SNMP screen The XL 12000S contains an SNMPv1 agent on the modem Tut Systems provides a proprietary SNMP Management Information Base MIB on a diskette fo...

Страница 50: ...0 characters The default settings for communities are public and private The default setting for trap recipients is public NMS Network Address The address of the NMS The default settings for the NMS Network addresses are 0 0 0 0 Privileges R W Choose either R for read or W for read write privileges If community name is private default setting is W If community name is public default setting is R R...

Страница 51: ...lay is enabled a DHCP session between a host connected to the XL 12000S modem and a server reachable by either the LAN or DSL ports of the XL 12000S may take place This allows host parameters including DHCP assigned IP addresses to be transferred from the server to the host This feature is usable in Routing or Bridging Non IP mode If both modems are in routing mode the LAN interface IP address nee...

Страница 52: ...he IP Address entered here specifies the server to and or from which the modem will forward packets Note The Broadcast IP Address is 0 0 0 0 To remove an IP address from the DSL or LAN Interface list simply change it to 0 0 0 0 8 3 Upgrade Software Occasionally Tut Systems will provide upgrades to the XL 12000S software Check the Software Download Center of Tut Systems web site www tutsys com for ...

Страница 53: ...ried which indicates that the modem has not yet tried to boot this image 4 Change Choose Image to Boot to the new untried image and press Enter to accept the new settings 5 Select R from the Main Menu and reboot the modem When the modem restarts the Upgrade Software screen will show that the new image is running and the untried notation will be gone Use the Upgrade Software screen once more to ver...

Страница 54: ...ge 1 or Image 2 Select the image that will be used on the next boot of the modem Enable Transfer to Image 2 Enables image transferring Select Y to enable and N to disable Detailed Steps for Running Tutxlutil Tutxlutil is the program used to send a new image to an XL 12000S Software upgrades are available from Tut Systems Tutxlutil must be run on a PC that has network connectivity to the modem The ...

Страница 55: ... password on the command line use p The name of the file provided by Tut Systems should be entered as the Upgrade file complete with any necessary path For example C tutxlutil f modem img u craft p 10 1 0 213 This means that tutxlutil and modem img are in the directory of the C drive and that craft is the username of the modem there is no password on the modem and the IP address of the modem is 10...

Страница 56: ...y use To return to the main menu press Ctrl X 9 1 Modem Status This screen displays the expanded status detail for the selected modem The DSL line state Master Slave selection and modem name are on the top and modem network statistics appear on the bottom Statistics are presented as rolling totals Powering down or reboot ing the modem will clear these registers Figure 9 1 Modem Status Screen From ...

Страница 57: ...ceived from the Ethernet link Packets Dropped Number of transmitted or received Ethernet packets dropped typically due to a lack of resources Packets with Errors Number of transmitted received Ethernet packets with errors Network Statistics Bytes Total Modem DSL Number of bytes transmitted received on the DSL line Packets Total Number of packets transmitted received on the DSL line Packets Dropped...

Страница 58: ... in error In Hdr Errs The number of incoming IP packets discarded due to an error in the headers such as bad checksums In Adr Errs The number of incoming IP packets discarded because the IP addresses in the header s destination field was not a valid address This count includes invalid addresses e g 0 0 0 0 and addresses of unsupported Classes e g Class E In Unknowns The number of incoming locally ...

Страница 59: ...nd a route to forward them to that final destination Out Requests The total number of IP packets that the local user protocols including ICMP supplied to the IP in requests for transmission Out Discards The number of outgoing IP packets for which no problems were encountered to prevent their transmission to their destination but that were discarded e g for lack of buffer space Out No Routes The nu...

Страница 60: ...rned off It is not a recommended configuration to have the modem plugged into an electrical outlet that is con trolled by a light switch 2 The Status LED continues to stay red This indicates one of two possible problems If the modem was just upgraded this indicates a problem with the new software If the modem is new this indicates a factory defect in the hard ware In both cases try power cycling t...

Страница 61: ...oth modem configurations in the C Modem Configuration screen Make sure that one of the modems is a Master and the other is a Slave A Master modem will send out a pulse on the wire to try and communicate with a Slave modem If both modems are configured as Master they are sending out these pulses and receiving a pulse from the remote end thinking it s a Slave Upon further examination the modem deter...

Страница 62: ...sult with your network administrator for the correct value Third if a ping is successful the problem more than likely lies within the PC The default gateway entry in the PC may be wrong In Windows 98 and earlier versions if more than one default gateway is specified only the first entry is used Make sure only one correct default gateway entry is present on the PC Finally if the IP address es have ...

Страница 63: ...used by the NMS If the modem source IP address for the get community name is different than the NMS you may want to either a change the modem source IP address for that community to be the NMS IP address or b if there are multiple NMS s which want to communicate with the modem using the same community name then configure the modem with multiple entries with the same community name but with separat...

Страница 64: ...is not responding to the network Connection to target closed unexpectedly The image was not completely sent Password incorrect The username password supplied are not valid on the target File does not appear to be an XL 12000S upgrade file The file you are using to upgrade the modem is either the wrong file or a corrupt file Upgrade file is empty or too big The file specified with f does not appear...

Страница 65: ...n questions can be found on our web site www tutsys com in the Service Support section If you are unable to resolve any question or believe you have defective equip ment contact Tut Systems Monday Friday 5 00am to 8 00pm Pacific Time at 800 998 4888 If you do not have access to 800 service please call 925 682 6510 press 0 and ask for Technical Support Equipment Return and Repair If you are unable ...

Страница 66: ...ferential transmit signal 3 Rx 10Base T differential receive signal 4 NC Unused 5 NC Unused 6 Rx 10Base T differential receive signal 7 NC Unused 8 NC Unused Note Assumes the switch on the rear of the unit is in the Normal position Table A 2 RJ 11 DSL Line Connector on Rear of Modem 6 pin connector 4 pin connector Pin Mnemonic Function Pin Mnemonic Function 1 NC Unused 1 NC Unused 2 NC Unused 2 TI...

Страница 67: ... SPEED NETWORK MODEM USER GUIDE APPENDIX B REFERENCE SCREEN SHOTS TUT SYSTEMS 59 Appendix B Reference Screen Shots Figures 7 1 and 7 7 Serial Session Version ID Screen Pages 13 and 30 Figure 7 8 Login Display Screen Page 31 ...

Страница 68: ...XL 12000S MANAGED HIGH SPEED NETWORK MODEM USER GUIDE 60 TUT SYSTEMS APPENDIX B REFERENCE SCREEN SHOTS Figure 7 9 Main Menu Screen Page 32 Figure 7 10 Modem Management Screen Page 33 ...

Страница 69: ...XL 12000S MANAGED HIGH SPEED NETWORK MODEM USER GUIDE APPENDIX B REFERENCE SCREEN SHOTS TUT SYSTEMS 61 Figure 7 11 Modem Configuration Screen Page 36 Figure 7 12 Password Change Screen Page 39 ...

Страница 70: ...XL 12000S MANAGED HIGH SPEED NETWORK MODEM USER GUIDE 62 TUT SYSTEMS APPENDIX B REFERENCE SCREEN SHOTS Figure 8 1 SNMP Management Screen Page 42 Figure 8 2 DHCP Relay Agent Screen Page 43 ...

Страница 71: ...XL 12000S MANAGED HIGH SPEED NETWORK MODEM USER GUIDE APPENDIX B REFERENCE SCREEN SHOTS TUT SYSTEMS 63 Figure 8 3 Upgrade Software Screen Page 46 Figure 9 1 Modem Status Screen Page 48 ...

Страница 72: ...XL 12000S MANAGED HIGH SPEED NETWORK MODEM USER GUIDE 64 TUT SYSTEMS APPENDIX B REFERENCE SCREEN SHOTS Figure 9 2 Modem IP Packet Statistics Screen Page 50 ...

Страница 73: ... using an ohmmeter short circuit one end of the phone wire and measure the resistance between the two wires at the other end Figure C 1 Using an ohmmeter to measure the length of phone wire 2 Multiply the resistance by 20 to find the length of the wire in feet For example 600 ohms would indicate a cable length of about 12 000 feet 600 x 20 12 000 This formula works for 24 gauge phone wire 600 OHMS...

Страница 74: ...ing with TCP IP by Douglas Comer Prentice Hall 1995 Table D 1 Subnet Mask Tables Subnet Mask 255 255 255 0 Total of Subnets 1 Subnet Hosts 254 Network Address IP Address Range Broadcast Address 0 1 254 255 Subnet Mask 255 255 255 128 Total of Subnets 2 Subnet Hosts 126 Network Address IP Address Range Broadcast Address 0 1 126 127 128 129 254 255 Subnet Mask 255 255 255 192 Total of Subnets 4 Subn...

Страница 75: ... 191 192 193 206 207 208 209 238 239 240 241 254 255 Subnet Mask 255 255 255 248 Total of Subnets 32 Subnet Hosts 6 Network Address IP Address Range Broadcast Address 0 1 6 7 8 9 14 15 16 17 22 23 24 25 30 31 32 33 38 39 40 41 46 47 48 49 54 55 56 57 62 63 64 65 70 71 72 73 78 79 80 81 86 87 88 89 94 95 96 97 102 103 104 105 110 111 112 113 118 119 120 121 126 127 128 129 126 127 136 137 142 143 1...

Страница 76: ...74 175 36 37 38 39 176 177 178 179 40 41 42 43 180 181 182 183 44 45 46 47 184 185 186 187 48 49 50 51 188 189 190 191 52 53 54 55 192 193 194 195 56 57 58 59 196 197 198 199 60 61 62 63 200 201 202 203 64 65 66 67 204 205 206 207 68 69 70 71 208 209 210 211 72 73 74 75 212 213 214 215 76 77 78 79 216 217 218 219 80 81 82 83 220 221 222 223 84 85 86 87 224 225 226 227 92 93 94 95 228 229 230 231 9...

Страница 77: ......

Страница 78: ...User Guide for the Managed High Speed Network Modem XL 12000S 2495 Estand Way Pleasant Hill CA 94523 800 998 4888 or 925 682 6510 TUT SYSTEMS ...

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