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Prestige 681 SDSL Router

Table of Contents

12.4

Problems Connecting to a Remote Node or ISP.................................................................................12-2

Glossary ............................................................................................................................. A

Index................................................................................................................................... G

Содержание Prestige 681

Страница 1: ...Prestige 681 SDSL Router User s Guide Version 2 50 Dec 1999...

Страница 2: ...XEL Communications Corporation Published by ZyXEL Communications Corporation All rights reserved Disclaimer ZyXEL does not assume any liability arising out of the application or use of any products or...

Страница 3: ...dance with the instructions may cause harmful interference to radio communications If this equipment does cause harmful interference to radio television reception which can be determined by turning th...

Страница 4: ...ided under this warranty is the exclusive remedy of the purchaser This warranty is in lieu of all other warranties express or implied including any implied warranty of merchantability or fitness for a...

Страница 5: ...rk HsinChu Taiwan support zyxel com 1 714 632 0882 800 255 4101 www zyxel com North America sales zyxel com 1 714 632 0858 ftp zyxel com ZyXEL Communications Inc 1650 Miraloma Avenue Placentia CA 9287...

Страница 6: ...ons for the Prestige 681 1 3 1 3 1 Internet Access 1 3 1 3 2 LAN to LAN Application 1 4 Chapter 2 Hardware Installation Initial Setup 2 1 2 1 Front Panel LEDs OF P681 2 1 2 2 Prestige 681 Rear Panel a...

Страница 7: ...faults 4 1 4 2 TCP IP Parameters 4 1 4 2 1 IP Address and Subnet Mask 4 1 4 2 2 Private IP Addresses 4 2 4 2 3 RIP Setup 4 2 4 2 4 DHCP Configuration 4 3 4 3 Route IP Setup 4 4 4 4 TCP IP Ethernet Set...

Страница 8: ...rnal Network Number 7 2 7 1 4 Internal Network Number 7 2 7 2 Prestige 681 in an IPX Environment 7 3 7 2 1 Prestige 681 on LAN with Server 7 3 7 2 2 Prestige 681 on LAN without Server 7 3 7 3 IPX Ethe...

Страница 9: ...5 11 2 Log and Trace 11 5 11 2 1 Viewing Error Log 11 5 11 2 2 Syslog And Accounting 11 6 11 3 Diagnostic 11 9 11 4 Backup Configuration 11 10 11 5 Restore Configuration 11 11 11 6 Upload Firmware 11...

Страница 10: ...Prestige 681 SDSL Router x Table of Contents 12 4 Problems Connecting to a Remote Node or ISP 12 2 Glossary A Index G...

Страница 11: ...______________________________________ 2 11 Figure 3 1 Dedicated Leased Lines Multiple Sites ___________________________________ 3 1 Figure 3 2 Frame Relay Solution ___________________________________...

Страница 12: ...______________________________ 7 8 Figure 8 1 Menu 3 5 Bridge Ethernet Setup ________________________________________ 8 2 Figure 8 2 Menu 11 3 Remote Node Bridging Options ____________________________...

Страница 13: ...gure 11 7 Menu 24 3 2 System Maintenance Syslog and Accounting ___________________ 11 6 Figure 11 8 Menu 24 4 System Maintenance Diagnostic______________________________ 11 9 Figure 11 9 Backup Config...

Страница 14: ...____________________ 4 8 Table 4 4 Internet Account Information ______________________________________________ 4 9 Table 4 5 Internet Access Setup Menu Fields_________________________________________...

Страница 15: ...e 9 7 IPX Filter Rule Menu Fields______________________________________________ 9 14 Table 10 1 SNMP Configuration Menu Fields_______________________________________ 10 2 Table 11 1 System Maintenance...

Страница 16: ...rovides high immunity from background noise The P681 s 10 100M auto negotiating LAN interface enables fast data transfer of either 10Mbps or 100Mbps in either half duplex or full duplex mode depending...

Страница 17: ...means for you to type one or more characters and press the carriage return Select or Choose means for you to select one from the predefined choices The SMT menu titles and labels are in Bold Times fon...

Страница 18: ...and introduces Frame Relay The Internet Chapter 4 This shows you how to configure your Prestige for Internet access Advanced Applications Chapters 5 8 Describes how to use your Prestige for more advan...

Страница 19: ...its sec Unlike traditional HDSL systems which use two twisted pair SDSL reduces equipment and lease line costs by providing the same service using only one twisted pair and one modem at each end SDSL...

Страница 20: ...t is point to point which means that all bandwidth on the circuit is dedicated to a single client If your company needs fast Internet access then SDSL allows you to transfer data up to 3 times faster...

Страница 21: ...complete networking solution for almost any user l Ease of Installation Your Prestige is designed for quick intuitive and easy installation Physically its compact size and lightweight make it easy to...

Страница 22: ...assign TCP IP settings to workstations on your network Your P681 can act as a DHCP server or client l Networking Compatibility Your Prestige is compatible with the major SDSL DSLAM Digital Subscriber...

Страница 23: ...added network security and management 1 3 Applications for the Prestige 681 1 3 1 Internet Access The Prestige is the ideal high speed Internet access solution Your Prestige supports the TCP IP protoc...

Страница 24: ...your Prestige offers the Single User Account SUA feature that allows multiple users on the LAN Local Area Network to access the Internet concurrently for the cost of a single user 1 3 2 LAN to LAN Ap...

Страница 25: ...me Relay Both Prestiges act as clients when they are connected via a Frame Relay network When they are connected directly via a leased line for example then one Prestige must act as a server and the o...

Страница 26: ......

Страница 27: ...nctioning properly while an off SYS LED indicates the system is not ready or a malfunction The system is rebooting when the SYS LED is blinking LAN 10M A steady green light indicates a 10Mb Ethernet c...

Страница 28: ...ound the Prestige by connecting a grounded wire to the F G Frame Ground of the Prestige Step 2 Connecting the SDSL Line Connect the Prestige directly to the telephone jack using the SDSL cable include...

Страница 29: ...the rear panel of your Prestige 2 3 Additional Installation Requirements In addition to the contents of your package there are other hardware and software requirements you need before you can install...

Страница 30: ...C adapter and do not locate the product where anyone can walk on the power cord 9 Do not service the product by yourself Opening or removing covers can expose you to dangerous high voltage points or o...

Страница 31: ...y Step 2 Entering Password The login screen appears prompting you to enter the password as shown below For your first login enter the default password 1234 As you type the password the screen displays...

Страница 32: ...Within a menu press ENTER to move to the next field You can also use the Up Down arrow keys to move to the previous and the next field respectively Enter information Fill in or Press the SPACE BAR to...

Страница 33: ...this menu to set up static routes 15 SUA Server Setup Use this menu to specify inside servers when SUA is enabled 21 Filter Set Configuration Use this menu to set up filters to provide security etc 22...

Страница 34: ...rmware file sometimes referred to as the ras file is the file that contains the ZyXEL Network Operating System firmware and the external firmware file is usually called the router model name with a bi...

Страница 35: ...fore and the speed of the console port will be reset to the default of 9600bps with 8 data bit no parity and 1 stop bit 8n1 The password will be reset to the default of 1234 also Turn off the Prestige...

Страница 36: ...enable IP routing You must enable IP routing for Internet access Yes No Route IPX Set this field Yes to enable IPX routing Yes No Bridge Turn on off bridge forwarding for protocols not supported e g S...

Страница 37: ...urn to this menu to define the filter sets 2 12 Protocol Dependent Ethernet Setup Depending on the protocols for your applications you need to configure the respective Ethernet Setup as outlined below...

Страница 38: ......

Страница 39: ...tes site A site B site C and site D as shown in the next figure and you need to interconnect these sites with both data links and voice lines As data traffic is relatively continuous throughout the da...

Страница 40: ...s called a VC virtual circuit of which there are two types Permanent VCs PVCs have constant end points and need to be set up in advance while switched VCs SVCs are set up on the fly as needed The Pres...

Страница 41: ...K SEQUENCE is a checksum used for error detection FLAG This flag field holds the End of frame marker 3 1 2 Connection setup The carrier gives you a specific DLCI data link connection identifier for ea...

Страница 42: ...e actual transmission speed agreed between you and the peer Both the Prestige and the peer must have the same transmission rate Press the SPACEBAR in the Transfer Rate field to step through the transm...

Страница 43: ...not selectable as this version of the P681 supports Ascend Lucent type SDSL routers only1 Ascend Lucent Transfer Rate Press the SPACEBAR to step through the transmission speed options and then press...

Страница 44: ...de you with this information Figure 3 5 Menu 2 1 Frame Relay Options Table 3 4 Menu 2 1 Frame Relay Options Fields Field Description Options Link Management This function is responsible for monitoring...

Страница 45: ...on If the ISP or your network administrator assigns you a block of registered IP addresses follow their instructions in selecting the IP addresses and the subnet mask If the ISP did not explicitly giv...

Страница 46: ...e other hand if you are part of a much larger organization you should consult your network administrator for the appropriate IP addresses Note Regardless of your particular situation do not create an...

Страница 47: ...2 The DNS server is extremely important because without it you must know the IP address of a machine before you can access it The DNS server addresses that you enter in the DHCP setup are passed to t...

Страница 48: ...elect General Setup and press ENTER Set the Route IP field to Yesby pressing the SPACE BAR Figure 4 1 Menu 1 General Setup 4 4 TCP IP Ethernet Setup and DHCP You will now use Menu 3 2 to configure you...

Страница 49: ...DHCP Setup DHCP Server Client IP Pool Starting Address 192 168 1 33 Size of Client IP Pool 32 Primary DNS Server 0 0 0 0 Secondary DNS Server 0 0 0 0 Remote DHCP Server N A TCP IP Setup IP Address 19...

Страница 50: ...NS Server Enter the IP addresses of the DNS servers The DNS servers are passed to the DHCP clients along with the IP address and the subnet mask Remote DHCP Server If Relay is selected in the DHCP fie...

Страница 51: ...of a building A WAN Wide Area Network on the other hand is an outside connection to another network or the Internet 4 5 1 LANs WANs and the Prestige The actual physical connection determines whether t...

Страница 52: ...y data without any special control codes Information in the frame contains control and response commands however HDLC supports full duplex transmission in which data is transmitted in two directions a...

Страница 53: ...ternet Account Information Write your account information here Telephone Company Information DLCI see section 4 7 above ISP Information Login Name Password for ISP authentication Link Compatibility se...

Страница 54: ...see the following section for a more detailed discussion on the Single User Account feature Yes No IP Address Enter the IP address supplied by your ISP if applicable i e if you enabled SUA See Table...

Страница 55: ...ss sharing by translating the internal LAN IP addresses to a single address that is globally unique on the Internet For more information on IP address translation refer to RFC 1631 The IP Network Addr...

Страница 56: ...n though SUA makes your whole inside network appear as a single machine to the outside world A service is identified by the port number e g web service is on port 80 and FTP on port 21 As an example s...

Страница 57: ...ehind SUA To make a server visible to the outside world specify the port number of the service and the inside IP address of the server in Menu 15 Multiple Server Configuration 4 10 1Configuring a Serv...

Страница 58: ...ort numbers Please also refer to our PNC Disk for more examples and details on SUA Table 4 7 Services vs Port number Services Port Number FTP File Transfer Protocol 21 Telnet 23 SMTP Simple Mail Trans...

Страница 59: ...ode Menu 4 discussed previously see Figure 4 4 is actually a simplified setup for the remote node that you can access in Menu 11 5 1 1 Remote Node Profile To configure a remote node do the following F...

Страница 60: ...nter the login name that this remote node will use when it calls your Prestige The login name in this field combined with the Rem Node Password will be used to authenticate this node Incoming Rem Pass...

Страница 61: ...the packets are discarded Press SPACE BAR to toggle Yes No Edit PPP Options To edit the PPP options for this remote node move the cursor to this field use the SPACE BAR to select Yes and press ENTER...

Страница 62: ...P Options field in Menu 11 1 Remote Node Profile and use the SPACE BAR to toggle this field to Yes Press ENTER to open Menu 11 2 as shown next Figure 5 2 Menu 11 2 Remote Node PPP Options The followin...

Страница 63: ...e You can specify up to 4 filter sets separated by comma e g 1 5 9 12 in each filter field Note that spaces are accepted in this field For more information on defining the filters see Chapter 9 Filter...

Страница 64: ......

Страница 65: ...d to configure a remote node in order to dial out to the headquarters Additionally you may also need to define static routes if some services reside beyond the immediate remote LAN 6 1 1 Editing TCP I...

Страница 66: ...PI IP LAN to LAN Connection To configure the TCP IP parameters of a remote node first configure these fields in Menu 11 Remote Node Profile as shown in the next table Menu 11 3 Remote Node Network Lay...

Страница 67: ...ER to go to Menu 11 3 Remote Node Network Layer Options menu Yes Yes No The following table shows the TCP IP related fields in Menu 11 3 Remote Node Network Layer Options Table 6 2 TCP IP Remote Node...

Страница 68: ...Version Press the SPACE BAR to select the RIP version from RIP 1 RIP 2B RIP 2M RIP 1 default Once you have completed filling in the Network Layer Options Menu press ENTER to return to Menu 11 Press EN...

Страница 69: ...c route use Menu 12 Static Route Setup as shown next Figure 6 5 Menu 12 IP Static Route Setup From Menu 12 enter the index of the static route you wish to edit to open Menu 12 1 Edit IP Static Route M...

Страница 70: ...eway is an immediate neighbor of your Prestige that will forward the packet to the destination On the LAN the gateway must be a router on the same segment as your Prestige over WAN the gateway must be...

Страница 71: ...y one server need to have the network numbers configured and all other stations clients and servers can obtain the network numbers from it The server with configured network numbers is called a seed r...

Страница 72: ...gure 7 1 7 1 4 Internal Network Number In addition to the external network numbers each NetWare server has its own internal network number that is a virtual network to which the server is attached It...

Страница 73: ...LAN with Server If your Prestige 681 is on a LAN with a seed router you do not need to configure the LAN network numbers Your Prestige 681 will learn the network number from the seed router and add t...

Страница 74: ...rame Type Enable Disable the individual frame type Remember to enable only the ones that are actually used on your network 802 2 802 3 Ethernet II SNAP IPX Network If your Prestige 681 is a seed route...

Страница 75: ...ypical LAN to LAN application is to use your Prestige 681 to call from a branch office to the corporate headquarters to enable the stations in the branch office to access the NetWare servers at the he...

Страница 76: ...IPX or Route IP IPX Step 2 Move the cursor to the Edit IP IPX Bridge field then press the SPACE BAR to toggle this field to Yes and press ENTER to open Menu 11 3 Network Layer Options Figure 7 5 Menu...

Страница 77: ...ave this field as 00000000 your Prestige will determine automatically the network number through negotiation with the PPP peer 00000000 default Hop Count This field indicates the number of intermediat...

Страница 78: ...to that remote node is established From Menu 12 select two then select one of the IPX Static Routes to open Menu 12 2 1 Edit IPX Static Route as shown next Figure 7 6 Menu 12 2 Edit IPX Static Route M...

Страница 79: ...f the node on which the server resides If you are using a Novell IPX implementation this value is 000000000001 Socket This field contains the socket number on which the server will receive service req...

Страница 80: ......

Страница 81: ...enerates more traffic for the same network layer protocol and it also demands more CPU cycles and memory For efficiency reasons do not turn on bridging unless you need to support protocols other than...

Страница 82: ...ocol response packets will not trigger calls Server When there are only IPX servers on the LAN No RIP or SAP packets will trigger calls In addition during the time when the line is down your Prestige...

Страница 83: ...s Table 8 2 P681 Remote Node Network Layer Menu Bridge Options Field Description Bridge menu 11 1 Make sure this field is set to Yes Edit IP IPX Bridge menu 11 1 Press the SPACE BAR to change the defa...

Страница 84: ...stige 681 about the route to a node before a connection is established You configure bridge static routes in Menu 12 3 1 by pressing 3 in menu 12 and then selecting one of the bridge static routes as...

Страница 85: ...te the static route Ether Address Enter the MAC address of the destination machine that you wish to bridge the packets to IP Address If available enter the IP address of the destination machine that y...

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Страница 87: ...a single set and give it a descriptive name The Prestige allows you to configure up to twelve filter sets with six rules in each set for a total of 72 filter rules in the system You cannot mix device...

Страница 88: ...t Filter Rule Execute Filter Rule Next Filter Rule Available Fetch Next Filter Rule No Fetch First Filter Set Yes Check Next Rule Drop No Forward Figure 9 1 Filter Rule Process You can apply up to fou...

Страница 89: ...6 Comments NetBIOS_WAN NetBIOS_LAN TELNET_WAN ______________ ______________ ______________ Filter Set 7 8 9 10 11 12 Comments ______________ ______________ ______________ ______________ _____________...

Страница 90: ...r set The following tables contain a brief description of the abbreviations used in Menu 21 1 Menu 21 2 Filter Rules Summary A Type Filter Rules M m n 1 Y IP Pr 17 SA 0 0 0 0 SP 137 DA 0 0 0 0 DP 53 N...

Страница 91: ...e an action can be taken N means you can now specify an action to be taken i e forward the packet drop the packet or check the next rule For the latter the next rule is independent of the rule just ch...

Страница 92: ...viations listed in the following table will be used Table 9 4 Abbreviations Used If Filter Type Is GEN Abbreviation Description Off Offset Len Length Refer to the next section for information on confi...

Страница 93: ...onfigure a TCP IP rules select TCP IP Filter Rule from the Filter Type field and press ENTER to open Menu 21 1 1 TCP IP Filter Rule as shown next Figure 9 6 Menu 21 1 1 TCP IP Filter Rule The followin...

Страница 94: ...his field is a don t care if it is 0 0 0 0 IP Address Source IP Mask Enter the IP subnet mask to apply to the Source IP Addr IP Mask Source Port Enter the source port of the packets that you wish to f...

Страница 95: ...Select the action for a packet not matching the rule Check Next Rule Forward Drop Once you have completed filling in Menu 21 1 1 TCP IP Filter Rule press ENTER at the message Press ENTER to Confirm to...

Страница 96: ...ive Check IP Protocol Drop Drop Packet Accept Packet Drop Forward Check Next Rule Check Next Rule Check Next Rule Forward Not Matched Yes No Check Src IP Addr Apply SrcAddrMask to Src Addr Matched Che...

Страница 97: ...e result against the Value to determine a match The Mask and Value are specified in hexadecimal numbers Note that it takes two hexadecimal digits to represent a byte so if the length is 4 the value in...

Страница 98: ...the value in Hexadecimal to compare with the data portion More If yes a matching packet is passed to the next filter rule before an action is taken else the packet is disposed of according to the acti...

Страница 99: ...ype field and press ENTER to open Menu 21 1 3 IPX Filter Rule as shown in the figure below Figure 9 9 Menu 21 1 3 IPX Filter Rule Menu 21 1 3 IPX Filter Rule Filter 1 1 Filter Type IPX Filter Rule Act...

Страница 100: ...tination Source Socket Enter the destination source socket number 2 byte in hexadecimal of the packets that you wish to filter Destination Source Socket Comp Select the comparison you wish to apply to...

Страница 101: ...ple Step 1 Enter 21 from the Main Menu to open Menu 21 Filter Set Configuration Step 2 Enter the index of the filter set you wish to configure in this case 3 and press ENTER Step 3 Enter a descriptive...

Страница 102: ...tched Drop Action Not Matched Forward Press ENTER to Confirm or ESC to Cancel Press Space Bar to Toggle Press the SPACEBAR to choose this filter rule type The first filter rule type determines all sub...

Страница 103: ...3 as shown in Figure 9 15 Menu 21 3 Filter Rules Summary A Type Filter Rules M m n 1 Y IP Pr 6 SA 0 0 0 0 DA 0 0 0 0 DP 23 N D F 2 N 3 N 4 N 5 N 6 N Enter Filter Rule Number 1 6 to Configure 1 This s...

Страница 104: ...e point when the Prestige is receiving and sending the packets i e the interface The interface can be an Ethernet port or any other hardware port The following diagram illustrates this Figure 9 13 Pro...

Страница 105: ...raffic from triggering calls to the ISP The TELNET filter is designed to block outside users telnetting into the Prestige see Figure 9 10 Figure 9 15 Filtering Remote Node traffic Menu 3 1 General Eth...

Страница 106: ......

Страница 107: ...To configure SNMP select SNMP Configuration enter 22 from the Main Menu to open Menu 22 SNMP Configuration as shown in the figure below The community for Get Set and Trap fields is simply SNMP s termi...

Страница 108: ...anagement station public Trusted Host If you enter a trusted host your Prestige will only respond to SNMP messages from this address If you leave the field blank default your Prestige will respond to...

Страница 109: ...ols in detail Select menu 24 in the main menu to open Menu 24 System Maintenance as shown below Figure 11 1 Menu 24 System Maintenance Menu 24 System Maintenance 1 System Status 2 System Information a...

Страница 110: ...ounters and ESC takes you back to the previous screen The table below describes the fields present in Menu 24 1 System Maintenance Status It should be noted that these fields are READ ONLY and are mea...

Страница 111: ...de Ethernet Status Shows the current status of the LAN Tx Pkts The number of transmitted packets to the LAN Rx Pkts The number of received packets from the LAN Collision Number of collisions WAN Line...

Страница 112: ...Version Displays the driver version number of the SDSL chipset ANSI Version Displays the ANSI version number Ethernet Address Refers to the Ethernet MAC Media Access Control of your Prestige IP Addres...

Страница 113: ...g facility for message logging 11 2 1Viewing Error Log The first place you should look for clues when something goes wrong is the error log Follow the procedure below to view the local error trace log...

Страница 114: ...in the following table to activate syslog then choose what you want to log 45 7203 PINI INFO Channel 11 ok 46 7204 PINI INFO Channel 10 ok 47 7205 PINI INFO Channel 9 ok 48 7206 PINI INFO Channel 8 ok...

Страница 115: ...slog server when this field is set to Yes Filter log No filters are logged when this field is set to No Filters with the individual filter Log Filter field set to Yes are logged when this field is set...

Страница 116: ...168 102 2 ZyXEL Communications Corp Packet Trigger Protocol 1 Data 4500002c1b0140001f06b50ec0a86614ca849a7b0427001700195b3e00000000600220008cd4000002040 5b4 Jul 19 11 29 06 192 168 102 2 ZyXEL Communi...

Страница 117: ...s you to test the different aspects of your Prestige to determine if it is working properly Menu 24 4 allows you to choose among various types of diagnostic tests to evaluate your system as shown Figu...

Страница 118: ...uration to a file on your computer Backup is highly recommended once your Prestige is functioning properly You must perform the backup and restore through the console port Any serial communications pr...

Страница 119: ...omputer to another machine 11 5 Restore Configuration Selecting option 6 from Menu 24 System Maintenance to copy the configuration from your computer to the Prestige Again when using the console port...

Страница 120: ...may also be uploaded via FTP There are 2 components in the system the router firmware and the configuration file as shown in the next figure Restoring the configuration as in menu 24 6 copies your cu...

Страница 121: ...sful firmware upload enter atgo to restart the Prestige Figure 11 16 Menu 24 7 1 Uploading Router Firmware 11 6 2Upload Router Firmware using FTP To transfer the firmware follow the procedure below Me...

Страница 122: ...ned within Menu 24 7 2 shows you the instructions for uploading the configuration file If you answer yes to the prompt the Prestige will go into debug mode Follow the procedure below to upload the con...

Страница 123: ...rivial File Transfer Protocol over LAN Although TFTP should work over WAN as well it is not recommended To use TFTP your workstation must have both telnet and TFTP clients To transfer the firmware and...

Страница 124: ...client on your workstation and connect to the Prestige Set the transfer mode to binary before starting data transfer Step 5 Use the TFTP client see the example below to transfer files between the Pre...

Страница 125: ...eck the ZyXEL Web site or send e mail to the ZyXEL Support Group Enter the IP address of the Prestige 192 168 1 1 is the Prestige default IP address when shipped Enter the path and name of the firmwar...

Страница 126: ...g the colon in the list of numbers that follows e g ATBA3 will give a console port speed of 9 6 Kbps ATSE displays the seed that is used to generate a password to turn on the debug flag in the firmwar...

Страница 127: ...ule Common Area ATDUx y dump memory contents from address x for length y ATRBx display the 8 bit value of address x ATRWx display the 16 bit value of address x ATRLx display the 32 bit value of addres...

Страница 128: ......

Страница 129: ...you should contact technical support 1 Check to see if the Prestige is connected to your computer s serial port VT100 terminal emulation 9600 bps Cannot access the Prestige via the console port 2 Chec...

Страница 130: ...ed to verify these variables with the telephone company and or ISP or the peer router in a LAN to LAN application 12 3 Problems with the LAN Interface Table 12 3 Troubleshooting the LAN Interface Prob...

Страница 131: ...RX is wired to TX This cable connects two similar devices for example two data terminal equipment DTE or data communications equipment DCE devices CSU DSU Channel Service Unit Data Service Unit CSUs...

Страница 132: ...ATM Asynchronous Transfer Mode or Internet connect system DSLAM A Digital Subscriber Line Access Multiplexer DSLAM is a network device usually at a telephone company central office that receives sign...

Страница 133: ...the ARPANET of the late 60 s and early 70 s The Internet now July 1995 connects roughly 60 000 independent networks into a vast global internet Intranet A private network inside a company or organiza...

Страница 134: ...on port 80 POTS Plain Old Telephone Service is the analog telephone service that runs over copper twisted pair wires and is based on the original Bell telephone system Twisted pair wires connect home...

Страница 135: ...a pair and the pair form a balanced circuit The twisting prevents interference problems STP shielded twisted pair provides protection against external crosstalk Straight through Ethernet cable A cabl...

Страница 136: ...of a Web browser The URL is basically a pointer to the location of an object WAN Wide Area Network s link geographically dispersed offices in other cities or around the globe Just about any long dista...

Страница 137: ...Line 2 2 Console Port Speed 11 5 Continuous Connection xix Copyright ii CPU Load 11 3 Customer Support v D Dedicated Bandwidth xix Diagnostic Tools 11 1 11 9 Backup 11 10 Boot Module Commands 11 18 Co...

Страница 138: ...10 I IANA 4 1 4 2 Initial Screen 2 5 Initialization 2 5 Internet Access ii xvi 1 1 1 2 1 3 1 4 2 7 4 1 4 9 4 10 4 11 4 12 Internet Assigned Numbers Authority See IANA Investment Protection xx IP Addr...

Страница 139: ...ructions 2 3 Scalability 1 1 SDSL Symmetrical Digital Subscriber Line xix SDSL Chipset Vendor 11 4 SDSL Maximun Transmission Distances 3 4 Security 1 3 Seed Router 7 3 7 4 Service Type 3 5 Single User...

Страница 140: ...11 7 Up Time 11 3 Upload Firmware FTP 11 13 11 15 V VC virtual circuit 3 2 virtual private network 3 2 VPN See virtual private network W WAN Wide Area Network 4 7 WAN Address 6 3 WAN link 3 4 Webmast...

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