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AT Commands

AT C

OMMANDS

The commands provided in the table below are used to control mo-
dems and are provided as a supplemental reference to documentation
that should have been included with your modem or fax/modem.

Basic AT Command Set

Each command, except for “+++” and “A/”, must be preceded by “AT”
and executed when you press the

<Enter>

key.

Command

Var Description

+++

–

Escape to command mode

–

Repeat last command

–

Answer command

Protocol for 1200 bps connection

V.22 mode

Bell 212A mode (Default)

string

Dial Command

Pulse dial, must precede number string

Tone dial, must precede number string

Содержание TW100-P1W1

Страница 1: ...TW100 P1W1 NWay Internet Print Multiple Server User s Guide Rev 01 July 1998 6ETH802H 01 Printed In Taiwan RECYCLABLE ...

Страница 2: ...haben 10 Verlegen Sie die Netzanschlußleitung so daß niemand darüber fallen kann Es sollete auch nichts auf der Leitung abgestellt werden 11 Alle Hinweise und Warnungen die sich am Geräten befinden sind zu beachten 12 Wird das Gerät über einen längeren Zeitraum nicht benutzt sollten Sie es vom Stromnetz trennen Somit wird im Falle einer Überspannung eine Beschädigung vermieden 13 Durch die Lüftung...

Страница 3: ...entsprechende Teile verwendet werden Der Einsatz von ungeeigneten Ersatzteilen kann eine weitere Beschädigung hervorrufen 17 Wenden Sie sich mit allen Fragen die Service und Repartur betreffen an Ihren Servicepartner Somit stellen Sie die Betriebssicherheit des Gerätes sicher ...

Страница 4: ... plan to use for a LAN connection and near the printer you would like to share through the server Note that the internet print multiple server can be hung on a wall using the wall mounting equipment included with the product Making Connections Step 3 Connect the internet print multiple server to your LAN using a Category 3 4 or 5 twisted pair cable and the device s single RJ 45 LAN port This conne...

Страница 5: ...is a number between 2 and 255 All stations must also mod ify their subnet mask settings to match the internet print multiple server subnet mask setting and set their d efault gateway to the local IP address in this case the default ad dress listed above used by the internet print multiple server If you want to use a different IP address range see Setting IP Addresses on page 16 Step 8 The internet...

Страница 6: ...rt Variables enter this user ID exactly as it was provided to you Step 11 ISP Account Password finally to complete the ISP login process the internet print multiple server must provide the password associated with the user I D assigned by your ISP Enter it You have now completed the basic steps necessary to install config ure and begin using the internet print multiple server Note that with respec...

Страница 7: ...f the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commer cial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with this user s guide may cause harmful interference to radio communications Operation of this equipment in a residential ...

Страница 8: ... s Guide xiii 1CHAPTER 1 INTRODUCTION 1 Product Description 1 Product Features 1 Internet Server Technology 2 2CHAPTER 2 INSTALLATION 7 Unpacking 7 Desktop Shelf Installation 8 Wall Installation 8 Port Description 9 Serial WAN 9 Parallel Printer 10 RJ 45 LAN 10 LED Description 10 Pw Tx 10 Link Rx 10 ...

Страница 9: ...and Telnet to Configure the Server 18 Using a Browser to Configure the Server 18 Minimum Configuration 19 DNS IP Address 20 ISP Account Phone Number 20 ISP Account User ID 21 ISP Account Password 22 Login Script 23 Operation 24 4CHAPTER 4 CONFIGURATION VARIABLES 25 System Variables 25 Server Name 25 Local LAN IP Address 26 Local LAN Subnet Mask 26 DNS IP Address 27 Maximum Idle Time 27 Operation M...

Страница 10: ...rinter 34 NetBEUI Workgroup Name 35 NetBEUI Maximum Connected Stations 35 AppleTalk Printer Type 35 AppleTalk Postscript Level 36 AppleTalk Font Group 36 DHCP Server Variables 37 Enable 37 IP Address Range Start 38 IP Address Range End 38 IP Lease Time 38 IP Reserve Table 39 Server Address Variables 39 System Monitoring 41 Displaying Information 41 Tools 42 Navigation Controls 43 5CHAPTER 5 PRINT ...

Страница 11: ...Station Configuration Problems 51 Operating Problems 52 7APPENDIX B SPECIFICATIONS 53 General 53 Environmental and Physical 54 8APPENDIX C AT COMMANDS 55 Basic AT Command Set 55 Extended AT Command Set 59 9APPENDIX D PORT PINOUTS 61 Serial Ports 61 Parallel Port 62 RJ 45 Port 63 10APPENDIX E GLOSSARY 65 INDEX 66 ...

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Страница 13: ...des information on the inter net print multiple server and internet server technology Chapter 2 Installation Helps you unpack understand and install the device Chapter 3 System Setup Explains how to set necessary op tions on the internet print multiple server Chapter 4 Configuration Variables Explains all available variables on the internet print multiple server and what o p tions exist for config...

Страница 14: ...ocating the source of problems and solving them Appendix B Specifications Lists the device s specifications Appendix C AT Commands Lists the basic and extended AT command sets Appendix D Port Pinouts Provides pinout data for the d e vice s ports Appendix E Glossary Provides the meaning for some net working terms used in this manual ...

Страница 15: ... multiple server is that it pro vides multi user access to the internet through a single user account and one connection More simply put an internet print multiple server takes a single internet connection that without it could only be used by one person and allows it to be used by multiple stations on the same network simultaneously The internet print multiple server also supports local network p...

Страница 16: ...er twisted pair cables Fast Ethernet connections support both shielded twisted pair and Category 5 unshielded twisted pair cables 56K maximum modem speed support 128K maximum ISDN TA speed support Internet Features include Dial On Demand NAT internet access DHCP server and virtual server Print Server support includes the following print server proto cols TCP IP NetBEUI and AppleTalk Flash memory f...

Страница 17: ...multiple server allows a single public IP ad dress to be shared by multiple local end points simultaneously Since the same range of local IP addresses can be used at as many multiple locations as necessary available IP addresses can increase ...

Страница 18: ...any people will be able to use it An internet print multiple server can also be used to expand a LAN by providing a means to create localized sub groups in a LAN to LAN configuration The internet print multiple server acts as a sin gle public IP address access point for the sub group LAN The sub group LAN can then use local IP addresses from the available ...

Страница 19: ...Introduction 5 ranges The effect of this is to expand the number of stations that can use IP addresses assigned to the LAN ...

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Страница 21: ... of your internet print multiple server and carefully unpack the contents The carton should contain the follow ing items One internet print multiple server device One AC power adapter suitable for your area s electrical power connections One 3 5 diskette with IS Admin software IS Admin User s Guide Wall mount hardware This User s Guide One lpr software diskette One lpr User s Guide ...

Страница 22: ...devices and direct sunlight Avoid proximity to large electric motors or other electromagnetic equipment Observe the following guidelines when choosing an installation loca tion Air temperature should range from 32 to 122 F 0 to 50 C Humidity should be less than 90 non condensing Site should not exceed the electromagnetic field RFC standards for IEC 801 3 Level 2 3V M field strength For a detailed ...

Страница 23: ...e Internet Print Multiple Server on a Wall Port Description Rear Panel Serial WAN The serial port is used for a WAN connection either to a modem or an ISDN terminal adapter The serial port is a standard male 9 pin RS 232 connector ...

Страница 24: ...D Description The internet print multiple server has a small LED array for indi cating current port and transmission status The power transmit Pw Tx and connect receive Link Rx LEDs only relate to activity on the LAN port All other LED indicators display information about their related ports as labeled Pw Tx The Pw Tx power transmit LED lights when power is supplied to the device and flashes when ...

Страница 25: ...PT LED should flash simultaneously three times This sequence of flashes should be followed by first the COM LED flashing once and then LPT LED flashing once repeated three times in succession If as prob lem with the device is detected during this time the LED flashes will display an error pattern see Appendix A Troubleshooting for more information on POST error indications If no errors are detecte...

Страница 26: ...rameter variables from your network station using Telnet or a web browser Connecting to the Internet The internet print multiple server must be connected to the internet this is also known as a Wide Area Network or WAN connection using the COM serial port The COM port can either be connected to the serial port of a modem or fax modem or to an ISDN terminal adapter The faster the WAN connection is ...

Страница 27: ...Installation 13 Since the internet print multiple server does not include a power switch plugging its power adapter into a power outlet will immedi ately power it on ...

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Страница 29: ...rint multiple server is provided in Chapter 4 Note that the variables and their options are the same regardless of whether you are using Telnet or a web browser although they are displayed in different formats Usage Note Throughout this user s guide we refer to your ISP An ISP is a company that pro vides internet services normally for a fee and usually via modems connected over telephone lines Fro...

Страница 30: ...server and a management PC have compatible IP address and subnet mask settings and are connected through the LAN ei ther an in band Telnet session or a web browser can be used to set the device s configurable variables and view its current operating status Default Addressing The internet print multiple server comes with a preset default IP address setting of 192 168 100 1 In order to configure the...

Страница 31: ...hind internet print multiple server technology is the use of local IP addresses that are never seen or used on public systems you must use IP addresses from the ranges below The fol lowing three IP address blocks have been set aside by internet regulatory authorities specifically for local only use 10 0 0 0 10 255 255 255 172 16 0 0 172 31 255 255 192 168 0 0 192 168 255 255 All local stations usi...

Страница 32: ... are prompted for a host address You should immediately see the internet print multiple server Telnet Interface console greeting screen Enter the password to access the device parameters There is no de fault password Once you have access use the menu item numbers to set the variables which are described later in this chapter Note When using Telnet to modify device parameters saving those parameter...

Страница 33: ...al devices If you use a non frames browser when you receive the initial inter net print multiple server screen you should see the main navigation menu rather than the navigation menu and the system status screen The functions are the same only the appearance will be dif ferent After you have access to the browser interface use the menu options in the left hand frame to choose the variables you wan...

Страница 34: ...ress available through the WAN connection This address should be pro vided by your ISP Note that without a DNS server IP internet sites will only be available using IP addresses and will not be available using URLs Default Value 0 0 0 0 Must Be User Modified Yes Description A Domain Name Service DNS server address is used to translate URLs into their corresponding IP addresses ISP Account Phone Nu...

Страница 35: ...ng the rest of the num ber This pause is necessary if there is normally a moment or two between dialing 0 and getting an outside dial tone Default Value none Must Be User Modified Yes Description The phone number entered in this variable is the number the internet print multiple server will dial to es tablish its internet WAN connection Note If the ISP phone line is busy the inter net print multip...

Страница 36: ...will be necessary to use the Login Script as described below ISP Account Password The password is the final step in the ISP dial up login process As with the username this password should have been assigned to you by your ISP when you registered for the service Options For dial up connections the ISP user access pass word exactly as provided i e all letters capitalized where necessary underscores ...

Страница 37: ...pt string and a keyin string must be provided The prompt string is the text dis played by the ISP requesting that something be entered The keyin string is what should be entered Prompt strings can be up to 25 characters long including punctuation Keyin strings can be up to 20 characters long including punctuation a maximum of 8 separate line entries Example If your ISP asks you to input a user ID ...

Страница 38: ... step in the login process Reply string data should be provided ex actly as it would be if it were hand entered Operation To access the internet do the following at each station that will use the internet print multiple server for internet access 1 Make sure that TCP IP settings are configured properly IP pa rameters that must be set IP Address must be a unique IP address chosen from the three res...

Страница 39: ...correspond with the menu listings presented by the internet print multiple server Telnet con sole program Note that those variables which must be user configured are further detailed in Chapter 3 System Variables Server Name Options An fifteen character string of letters and numbers Default Value IS xxxxxx where xxxxxx is the last six digits of the device s MAC address Description The server name ...

Страница 40: ...onsistent with the addresses to be used by other d evices on the network That is if the inter net print multiple server address is 192 168 100 1 all other addresses assigned to local network devices must start with 192 168 100 and have a final number between 2 and 255 Local LAN Subnet Mask This variable defines the subnet level the internet print multiple server will share with other devices on th...

Страница 41: ... by your ISP Note that without a DNS server IP internet sites will only be available using IP addresses and will not be available using URLs Default Value 0 0 0 0 Must Be User Modified Yes Description A Domain Name Service DNS server address is used to translate URLs into their corresponding IP ad dresses Maximum Idle Time This variable allows you to set an idle time after which the inter net prin...

Страница 42: ...ver Subnet Mask as subnet mask above LAN to LAN Internet Server Default Gateway Router s IP Address Default Value Mode LAN to WAN Description This option only needs to be changed if the internet print multiple server isn t going to be used to connect directly to an ISP Enabling LAN to LAN mode automatically disables the LAN to WAN and Server Address Mapping func tions LAN to LAN mode should be use...

Страница 43: ... access to the device WAN Port Variables Line Type Options Disable Dialup Lease Line Default Value Dialup Description The WAN port must be configured for use as either a dial up connection or a leased line connection Baud Rate Options 4800 9600 19200 38400 57600 115200 230400 460800 bps Default Value 115200 bps Description The setting of this variable sets the maximum bits per second data transmis...

Страница 44: ... in this variable is the number the internet print multiple server will dial to es tablish its internet WAN connection Note If the ISP phone line is busy the inter net print multiple server will automatically redial Three successive redial attempts will be made ISP Account User ID Options For dial up connections the ISP assigned user ID name exactly as provided i e all letters capitalized where ne...

Страница 45: ...ection is established and the username has been accepted ISP Account IP Address Options The IP address the ISP has assigned to this a c count Default Value 0 0 0 0 Description Dial up connections should use address 0 0 0 0 if the IP will be dynamically assigned at each connection Otherwise enter the IP address assigned by your ISP Modem AT Command Options sub variables Initial String AT F default ...

Страница 46: ... on 4 Data Terminal Ready DTR to off to hang up 5 Enable RTS CTS flow control Login Script Options For each line item a prompt string and a keyin string must be provided The prompt string is the text dis played by the ISP requesting that something be entered The keyin string is what should be entered Prompt strings can be up to 25 characters long including punctuation Keyin strings can be up to 20...

Страница 47: ... established The prompt string information entered in the table should in clude an indication of what data is being asked for at each step in the login process Reply string data should be provided ex actly as it would be if it were hand entered Print Server Variables The variables listed here are those available for print server control Refer to Chapter 5 for more information about setting up and ...

Страница 48: ...gh Description The parallel port speed setting controls the rate in general at which print job data will be transmitted to the printer Most newer printers can accept high speed data transmission If your printer loses characters then you may need to choose low speed mode Parallel Port PJL Printer Options Yes No Default Value No Description If the printer being used is compatible with the HP PJL Pri...

Страница 49: ...s determine what servers and resources will appear by default in lists of accessible resources You should assign to the print server the same workgroup name as the users who will be accessing it most often NetBEUI Maximum Connected Sta tions Options A number between 16 and 100 Default Value 32 Description The NetBEUI protocol allows you to limit the number of connections to a shared printer to pre...

Страница 50: ...alk print protocol requires that shared postscript printers be identified as to whether they are Level 1 or Level 2 postscript AppleTalk Font Group Options No font All fonts Standard 35 Standard 13 Default Value Standard 35 Description The AppleTalk print protocol requires that shared postscript printers be identified as to what font group is supported by the printer Most postscript printers suppo...

Страница 51: ...OFF Important Note If you use DHCP to set your local IP addresses the software IP settings of all stations on the network will need to be manually configured to 0 0 0 0 or as in the case of Windows 95 users the Obtain an IP address automatically option under TCP IP will have to be selected Enable Options Yes No Default Value No Description This variable is the on off switch for using a DHCP server...

Страница 52: ...ginning of the range of IP addresses available for DHCP use in assigning IPs It is paired with the next variable to create an address range IP Address Range End This is the second of the DHCP IP address range variables Options Any IP address within the three reserved IP ranges The IP address used must correlate with the IP set in the Beginning range variable Default Value 192 168 100 150 Descripti...

Страница 53: ...at those IP addresses will not be used by other devices on the LAN under any circumstances Note that devices listed in the Server Address Variables table should have their IP addresses listed here if DHCP is going to be used so that their IP addresses don t get assigned to other network stations Server Address Variables The Server Address Configuration table allows you to setup local servers for e...

Страница 54: ...rence to correctly route data requests Note that in LAN to LAN mode this function is disabled and no LAN devices can be accessed from the internet No Item number used for entry editing Maximum of 16 e n tries Local IP Address The LAN IP address for the server entered Any resource which will be shared to the internet through the server should have a dedicated IP address Protocol The type of server ...

Страница 55: ...ent setting and operational status of all of its func tions In display mode it is only possible to view the status of variables and functions it is not possible to modify or control them Displaying Information Monitor WAN Port Link Provides a display of the current WAN port link status i e whether or not the WAN port is connected Display Configuration Displays all configuration data for the device...

Страница 56: ...ng their size Tools Each of the management items listed below allows you to force some action Each of them prompt for confirmation before executing Dial Up Dial the ISP phone access for one or the other WAN port using the configuration stored under the WAN port control Hang Up Send the phone disconnect command string to the modem immediately to end the current session Reset Return the internet pri...

Страница 57: ...on is followed by a prompt for confirmation Note When using Telnet to modify device parameters saving the configuration immediately ends the Telnet session Quit Quits the current function or the entire manage ment system Activation is followed by a prompt for confirmation Return to Main Menu Returns the management console to the first menu screen Return to Previous Menu Takes you up one menu level...

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Страница 59: ...orkload relief to file serv ers and allows the file servers full capacity to be used for file access or other direct services to network users The internet print multiple server s IEEE 1284 compliant high speed bi directional parallel printer port can transmit to high speed laser printers much faster than a PC s parallel printer port A high speed laser printer can thus be used at its full capacity...

Страница 60: ...ppleTalk MacOS EtherTalk The print server configuration features and operation can all be controlled using the same Telnet or browser interface as the WAN port and other a spects of the internet print multiple server see the previous chapter Connecting for Print Service To connect your printer to the internet print multiple server you should use the standard parallel cable that comes with the prin...

Страница 61: ...r s output plug into the power input socket on the rear panel of the internet print multiple server 8 Plug the AC power adapter into an electric service outlet This will supply power to the internet print multiple server The server has no power switch Print Server Configuration Print server configuration and operation is controlled through the same Telnet console or browser interface as the WAN po...

Страница 62: ...er User s Guide Print Server Function 48 2 Parallel Port Speed 3 Parallel Port PJL Printer 4 NetBEUI Workgroup Name 5 NetBEUI Maximum Connected Stations 6 AppleTalk Printer Type 7 AppleTalk Postscript Level 8 AppleTalk Font Group ...

Страница 63: ...e indicated by different flashing front panel LED combinations Note The LEDs flash as a normal part of the sys tem initialization The error flash codes listed in the table below will be constant and thus unlike the brief LED indications at initial power on LED POST Error Indication Table COM STATE LPT STATE ERROR INDICATED 0 slow flashing slow flashing Need to reload firm ware 1 on on DRAM Error ...

Страница 64: ... Error 10 fast flashing on EEPROM Error 11 1 long 11 short off LAN IO Base Error Device Installation Problems WAN IP ADDRESSES If you have trouble connecting with or contacting your ISP double check the IP address setting of the inter net print multiple server Particularly if your ISP is not using DHCP to dynamically a ssign IP addresses make certain that you are using the right IP for the login y...

Страница 65: ...nt multiple server s DHCP server function make certain that you are using only IP addresses from the three reserved ranges and that each PC s IP address is within the same subnet as the internet print multiple server LAN IP Station Configuration Problems SUSPEND BROWSER PROXIES When using a browser to con figure the internet print multiple server we recommend that you suspend use of proxies until ...

Страница 66: ...the setting of the initial string for discrep ancies with your modem s operational features ISP DETAILS Double check all ISP login information i e user name password phone number for accuracy OUTSIDE LINE ACCESS DIALING If it is necessary for you to dial a special number in order to dial a phone number outside of your office that dialing information will need to be included in the phone number inf...

Страница 67: ...llel interface Protocol CSMA CD Network Data Transfer Rate NWay Fast Ethernet 100Mbps Or Ethernet 10Mbps Ports One RJ 45 NWay LAN port One RS 232 serial WAN port and One 25 pin standard parallel printer port Network Media Ethernet Category 3 or better UTP cable 100m maximum Fast Ethernet UTP Cat 5 or STP 100 ohm twisted pair 100m maximum Status LEDs Pw Tx power on transmit Link Rx connect o k rece...

Страница 68: ... Physical Power Supply 12VDC 500mA external Dimensions 164 x 118 2 x 30 mm W x L x H Weight 245 grams approximately 8 6 ounces Operating Temp 0 to 55 C Storage Temp 25 to 55 C Humidity 5 to 95 non condensing Emissions FCC Class A CE VCCI Class A C Tick Safety UL CSA CE Mark TÜV GS ...

Страница 69: ... your modem or fax modem Basic AT Command Set Each command except for and A must be preceded by AT and executed when you press the Enter key Command Var Description Escape to command mode A Repeat last command A Answer command Bn Protocol for 1200 bps connection 0 V 22 mode 1 Bell 212A mode Default Dstring Dial Command P Pulse dial must precede number string T Tone dial must precede number string ...

Страница 70: ...return to off hook Command append Return to command mode after dialing to allow additional dialing command S n Dial a stored number where n is equal to 0 1 or 2 corresponding to the slot number Fn Select Line Modulation 0 Auto detect mode 1 V 21 or Bell 103 2 Reserved 3 V 23 4 V 22 or Bell 212A 1200 bps line speed 5 V 22 6 V 32bis or V 32 4800 7 V 32 7200 8 V 32bis or V 32 9600 9 V 32bis 12000 10 ...

Страница 71: ...ce type 4 Report response programmed by an OEM 5 Report the country code parameter 6 Report modem data pump model and code version Ln Speaker Volume 0 Off 1 Low Default 2 Medium high 3 High Mn Speaker Control 0 Speaker always off 1 Speaker on during handshaking and off while re ceiving carrier Default 2 Speaker on during handshaking and while receiv ing carrier 3 Speaker off during dialing and rec...

Страница 72: ...speeds of 2400 bps or higher P Force Pulse Dialing Qn Modem Responses Determines whether the mo dem returns responses after typing a command 0 Send responses to local computer Default 1 Do not send response Sn Select S Register as default Sn Display the value of S Register n Sn v Change the value of Register n to v v Set default S Register to value v Display the value of the default S Register T F...

Страница 73: ...ption Bn Data rate terminal to modem 1 DTE DCE rate fixed at DTE setting Cn Carrier Detect signal status 0 Forced to On continuously Default 1 Follows the status of remote carrier signal Dn Date Terminal Ready DTR operations 2 DTR off causes modem to hang up F Load the default factory settings Hn Data flow control DTE DCE 0 Flow control disabled 3 Hardware RTS CTS flow control 4 Software Xon Xoff ...

Страница 74: ...Internet Print Multiple Server User s Guide AT Commands 60 0 DSR overridden DSR always on ...

Страница 75: ...iple server s 9 pin RS 232 serial port Consult your modem s documenta tion for detailed information on how to physically connect the internet print multiple server to it Pin Signal Function 1 DCD Data Carrier Detected 2 RxD Received Data 3 TxD Transmitted Data 4 DTR Data Terminal Ready 5 Gnd Signal Ground 6 DSR Data Set Ready 7 RTS Request To Send 8 CTS Clear To Send 9 RI Ring Indicator ...

Страница 76: ...tor used on most print ers Signal names beginning with n are active low signals 25 pin Centronics Signal Source 1 1 nStrobe Host 2 2 Data 1 Bi directional 3 3 Data 2 Bi directional 4 4 Data 3 Bi directional 5 5 Data 4 Bi directional 6 6 Data 5 Bi directional 7 7 Data 6 Bi directional 8 8 Data 7 Bi directional 9 9 Data 8 Bi directional 10 10 nAck Printer 11 11 Busy Printer 12 12 PError Printer 13 1...

Страница 77: ... different lengths for Ethernet and Fast Ethernet Straight Twisted Pair Cable Pinouts Contact MDI X Signal MDI Signal 1 RD receive TD transmit 2 RD receive TD transmit 3 TD transmit RD receive 4 Not used Not used 5 Not used Not used 6 TD transmit RD receive 7 Not used Not used 8 Not used Not used RJ 45 Twisted Pair Cabling Active Pinout Configuration ...

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Страница 79: ...ernet LAN communications standard set by the IEEE in standard 802 3u also called Fast Ethernet 100Mbps 100 million bits per second an expression of transmission speed in a network 10BASE T The original Ethernet LAN communications standard set by the IEEE in standard 802 3 a 10Mbps standard 10Mbps 10 million bits per second an expression of transmission speed in a network A Address A number set of ...

Страница 80: ...nd unreadable transmission See CSMA CD Collision Domain A section of a network isolated from other sections by a switch bridge or hub that de tects and resolves collisions locally so that there is less impact on the entire network CSMA CD Carrier Sense Multiple Access with Colli sion Detection a network communications protocol in which each transmission source i e station server switch etc monitor...

Страница 81: ...s H Hub The central device in a star topology LAN used to connect each station to the network I IEEE Institute of Electrical and Electronics Engi neers an accredited professional group of scientists and engineers who help set stan dards for LAN communications technology In band Communications with a network device us ing the network medium itself Contrast with out of band Internet Server A device ...

Страница 82: ...r using a leased line because there is no bandwidth sharing LED Light Emitting Diode an electronic device that lights up when electricity is passed through it LEDs are commonly used for status indicators on electronic devices M Mbps Megabits per second millions of bits per sec ond T TCP IP Transmission Control Protocol Internet Pro tocol a suite of transport and network layer communications protoc...

Страница 83: ...shielded twisted pair twisted pair wire without shielding STP shielded twisted pair twisted pair wire with shield ing W WAN Wide Area Network an interconnected set of computers and other devices spread over a large geographic area Often used synony mously with internet Compare LAN ...

Страница 84: ...1 C cabling 43 CE vi 50 CSMA CD 49 62 D DC power adapter 43 E EtherTalk 42 F Fast Ethernet 2 49 61 63 FCC vi 50 I IEEE 1284 41 IEEE 802 3 2 49 installation 5 L LED 64 N NetBEUI 42 P pinouts 58 power switch none 43 protocols 42 R Rear Panel 8 RJ 45 64 S specifications 1 stack 5 STP 49 65 T TCP IP 42 U UTP 49 65 V VCCI vi 50 ...

Страница 85: ...W WAN 16 23 ...

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