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About your Internet Router

5

Firewall Protection

The firewall protection provided by the Internet Router is an intrinsic side effect
of IP sharing.  All users on the LAN share a single external IP address.  From
the external viewpoint, there is no network, only a single device.

For internal users, the Internet Router acts as a “transparent proxy server”,
translating the multiple internal IP addresses into a single external IP address.

For external requests, any attempt to connect to local resources are blocked.  The
Internet Router will not “reverse translate” from a global IP address to a local IP
address.

This type of “natural” firewall provides an impregnable barrier against malicious
attacks.

Содержание INET-810

Страница 1: ...P N 9560860000 ISDNLINK INET 810 INET 820 INET 830 INET 850 ISDN Router User s Guide ...

Страница 2: ...y interference received including interfer ence that may cause undesired operation CE Marking Warning This is a Class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures Copyright 1999 Jan All Rights Reserved Document Version 1 0 All trademarks and trade names are the properties of their respective owners ...

Страница 3: ...ii ...

Страница 4: ...nectors Switches 12 DIP Switches 13 CHAPTER 2 SETUP INTERNET ACCESS 15 Overview 15 Hardware Installation 15 Internet Router Configuration 16 Basic Setup Screen 20 PC Configuration 23 Operation Internet Access 24 CHAPTER 3 PRINTER SHARING 25 Overview 25 Software Installation 25 PC Configuration 26 CHAPTER 4 ADVANCED SETUP 31 Advanced Setup Screen 31 CHAPTER 5 ANALOG PORTS 33 Overview 33 Data 33 CHA...

Страница 5: ...nfiguration 41 Routing Example 42 CHAPTER 9 SERIAL PORT 45 Overview 45 Serial Port Configuration 46 Advanced Port Settings 48 Advanced Port Settings 49 Script File 50 CompuServe Script 52 Operation 53 CHAPTER 10 STATUS MONITORING 55 Overview 55 Status Screen 55 DHCP Status 56 ISDN Status 57 Port Status Test Screen 59 ...

Страница 6: ...PPENDIX B AT COMMANDS 70 Required Settings 70 Finding the current Initial String 70 AT Commands 72 APPENDIX C WINDOWS PEER TO PEER 76 Overview 76 Procedure 76 APPENDIX D SPECIFICATIONS 80 Internet Router INET 810 77 Internet Router INET 820 81 Internet Router INET 830 810 Internet Router INET 850 83 ...

Страница 7: ...iv This page was deliberately left blank ...

Страница 8: ...ctive solution of giving users of your network easy access to the vast resources available on the Internet Figure 1 Office to Internet All of the Internet Router models include a built in 4 port 10BaseT hub allowing you to easily create a peer to peer network Internet Router INET 830 and INET 850 include two 2 analog a b ports allowing you to connect the analog a b POTS telephone answering machine...

Страница 9: ...as a DHCP Server Ø Multi Segment LAN Support If you have a Router PCs on other LAN segments can use the Internet Router to access the Internet and on INET 830 and INET 850 share the printer Internet Access Features Ø Shared Internet Account All users on the LAN can share the same Internet Account Ø Additional Bandwidth via Serial Port If the ISDN link is insufficient you can connect a modem or ISD...

Страница 10: ...riority If both B channels are in use one channel will be disconnected when an incoming voice call is detected or you wish to make an outgoing voice call for INET 820 and INET 850 Printer Sharing Features for INET 830 and INET 850 Ø LAN Printer Sharing Users on the LAN can share the printer attached to the Internet Router All they need to do is install and configure the supplied software on their ...

Страница 11: ...checked using the standard Windows printer features Security Features Ø Configuration Data Optional password protection is provided to prevent unauthorized users from modifying the configuration Ø Firewall Protection All incoming data packets are monitored and all incoming server requests are filtered thus protecting your network from mali cious attacks from external sources ...

Страница 12: ...o network only a single device For internal users the Internet Router acts as a transparent proxy server translating the multiple internal IP addresses into a single external IP address For external requests any attempt to connect to local resources are blocked The Internet Router will not reverse translate from a global IP address to a local IP address This type of natural firewall provides an im...

Страница 13: ...5 sockets for S T connection Internet Access account with a local ISP Internet Service Provider For Printer Sharing PCs must be running one of the following operating systems Windows 95 or 98 Windows NT 3 51 NT4 0 Package Contents The following items should be included The Internet Router Unit Power Adapter ISDN RJ 45 connection cable 5M One 1 1 44M floppy disk or CD diskette containing the printe...

Страница 14: ...t your Internet Router 7 Internet Router INET 810 and INET 830 E A B C D PW R ERR LNK SD RD CD COL LK B 1 B2 T1 T2 LAN W AN T EL ISDN Figure 2 INET 810 and INET 830 Figure 3 Rear Panel INET 810 and INET 830 ...

Страница 15: ...nternet Router INET 820 E A B C D PW R ERR LNK SD RD CD COL LK B 1 B2 T1 T2 LAN W AN T EL ISDN Figure 4 INET 820 2 3 4 Rear Panel POWER UPLINK WAN 6 7 5 1 2 3 4 1 ISDN TEL1 TEL2 8 9 ON OFF 1 2 O N 3 4 5 Figure 5 Rear Panel INET 820 ...

Страница 16: ...et Router INET 850 E A B C D PW R ERR LNK SD RD CD COL LK B1 B2 T1 T2 LAN W AN TEL ISDN Printer Port Figure 6 INET 850 2 3 4 Rear Panel POWER UPLINK WAN 6 7 5 1 2 3 4 1 ISDN TEL1 TEL2 8 9 ON OFF 1 2 O N 3 4 5 Figure 7 Rear Panel INET 850 ...

Страница 17: ...L Packet collision Collisions are normal only if this light is on most of the time is there a problem C WAN SD Flashes when data is sent through the serial WAN port RD Flashes when data is received through the serial WAN port CD Carrier Detect This is ON when the WAN serial port connection is active D ISDN LK ON while the ISDN connection is being used B1 Flash while the 1st B channel is in use B2 ...

Страница 18: ...n Off Idle Flashing Off Normal Operation transmitting or receiving data via the LAN Rapid intermittent flashing of each LED Hardware error as detailed below Error Conditions G Green R Red G R repeated RAM error G G R R twice repeated Flash RAM error G G G R R R 3 times repeated Timer error G G G G R R R R 4 times repeated Serial port error G G G G G R R R R R 5 times repeated LAN port error G G G ...

Страница 19: ...eT uplink port If using both the built in hub and another hub use this port to connect to the other hub When this port is in use port 4 can NOT be used 6 WAN port Serial port If using an external modem connect it here See Chapter 9 Serial Port for further information 7 DIP switches See the following section 8 ISDN port Use a cable with RJ45 connectors to link this port to the S T interface on the ...

Страница 20: ... position the Internet Router will function normally Restore Default IP Address and Clear Password If the Internet Router s IP Address or password is lost the following procedure can be used to recover from this situation 1 Turn the power to the Internet Router OFF 2 Set DIP switch 1 ON and DIP switch 2 OFF 3 Turn the power to the Internet Router ON 4 Operate DIP switch 1 in the following sequence...

Страница 21: ...Internet Router User Guide 14 6 You can now connect to the Internet Router and make any configuration changes required ...

Страница 22: ... to Chapter 3 Printer Sharing for details Hardware Installation 1 Connect Network Cables For each PC connect one end of a 10BaseT network cable to the Internet Router s RJ 45 socket port1 to 4 and the other end into the RJ45 socket on the PC Cable length should not exceed 100 meters yards If connecting the Internet Router to another hub connect the Uplink port on the Internet Router to a normal po...

Страница 23: ...pt for the PWR LED go off If the ERR LED stays on or both the ERR and LNK LEDs continue to blink there is a hardware problem For more information on the LEDs refer to LED Indicators on page 10 and Link Error LEDs on page 11 Warning Only use the power adapter provided Using a different one may cause hardware damage Internet Router Configuration The Internet Router contains a HTTP server This enable...

Страница 24: ...Network card entry You will see a screen like the following Figure 9 TCP IP Properties DHCP 4 On the IP Address tab click the radio button for Obtain an IP address auto matically as above then reboot Your PC will obtain an IP Address from the Internet Router If your LAN already has a DCHP Server Set DIP switch 2 ON to disable the DHCP server in the Internet Router Enter a fixed IP Address on your ...

Страница 25: ...nternet Router is properly installed LAN connec tions are OK and it is powered ON Your PC and the Internet Router are on the same network segment If there is no router this must be the case If another PC or device is using the same IP address 192 168 0 1 as the Internet Router turn the other de vice OFF until you assign a new address to the Internet Router That your PC has a compatible IP address ...

Страница 26: ... In Netscape check Options Network Preferences Proxies Password If a password has been set for the Internet Router you will be prompted for the password as shown below If no password has been set you will not see this dialog box Figure 11 Password Dialog Leave the User Name blank and enter the password you assigned to the Internet Router Navigation Data Input Use the navigation bar on the left of ...

Страница 27: ...Internet Router User Guide 20 Basic Setup Screen Select the Basic Setup link from the navigation bar You will see a screen like the example below Figure 12 Basic Setup Screen ...

Страница 28: ...main Name Server translates names e g microsoft com to IP Addresses Enter the DNS IP address supplied or recom mended by your ISP Telephone Enter the telephone number used to connect to your ISP Telephone 2 Telephone 3 Optional Enter the telephone number s to try if the first number is busy ISDN Details Country Select your country from the drop down list Note that there are 5 entries for the USA I...

Страница 29: ... your LAN already has a DHCP server Give the Internet Router an IP address compatible with the addresses allocated by the DHCP server i e the last 3 digit number is NOT within the addresses allocated by the DHCP server the other numbers are the same as the addresses allocated by the DHCP server The Network Mask must be the same as the value used by the DHCP server If not already done set DIP switc...

Страница 30: ...ter 6 Routing for details If you use static fixed IP Addresses On each PC Set the Default Gateway Address on the Gateway tab to the IP Address allocated to the Internet Router On the DNS tab enter the same value as entered in the Internet Router Internet Settings Each PC must be configured for Internet access via the LAN rather than by dial up connection In Windows 95 98 Select Start Menu Accessor...

Страница 31: ...cation software The AOL for Windows software must be configured to use TCP IP network access rather than a dial up connection The configuration process is described below AOL for Windows Configuration Ensure that the Internet Router is configured first then carry out the following procedure Start the AOL for Windows communication software Version 2 5 3 0 or later Click the Setup button Select Crea...

Страница 32: ... installed and configured These procedures are detailed in the following sections Note that no additional Internet Router configuration is required However it must have a valid IP Address and Network Mask and be recognized as a valid device on your LAN The printer driver software supplied works with the following operating systems Windows 95 and 98 Windows NT 3 51 Windows NT 4 0 Software Installat...

Страница 33: ...tional and using the TCP IP protocol Internet Router is ON and has a valid IP Address and Network Mask The default IP Address is 192 168 0 1 and the default Network Mask is 255 255 255 0 Printer is connected to the Internet Router and on line Printer Port Configuration Data When you reach the stage of configuring the printer port the following data will be required Port Name Enter a descriptive na...

Страница 34: ...Server to establish a connection when the printer is busy Values range from 40 110 seconds Windows 95 98 Configuration 1 Go to Start4Settings4Printers Start the Add Printer Wizard 2 Select the Local printer option 3 Choose the Printer Model matching the printer attached to the Internet Router 4 Select PrintServer as the port in the Available Ports screen as shown below Figure 13 Available Ports Wi...

Страница 35: ... page 26 8 Follow the on screen instructions to finish adding a printer as normal Configuration is now complete You can now print using the printer connected to the Internet Router Windows NT 4 0 1 Go to Start4Settings4Printers Start the Add Printer Wizard 2 When prompted for which computer will manage the printer select the My Computer option 3 Choose the Printer Model matching the printer attach...

Страница 36: ...vice button All Internet Routers on your LAN will be listed Select the desired unit The name shown is the Internet Router s default name which includes the Hardware Address of the device 7 Enter the configuration information as detailed in Printer Port Configuration Data on page 26 8 Follow the on screen instructions to finish adding a printer as normal When prompted for Sharing select Not Shared ...

Страница 37: ...Server from the Print Destinations list 4 Click on Settings The Configure Print Server window will appear It will look like the screen below Figure 17 Printer Port Configuration NT 3 51 5 Click the Browse Device button All Internet Routers on your LAN will be listed Select the desired unit 6 Enter the configuration information as detailed in Printer Port Configuration Data on page 26 7 When finish...

Страница 38: ...en Advanced Setup Screen This screen can be reached by the Advanced Setup link on the navigation bar Figure 18 Advanced Setup Screen To see whether or not you require each feature please refer to the table below Feature Required Analog Ports Chapter 5 If you attach any device telephone fax etc to either Analog Port 4 ...

Страница 39: ...ad of 2 set B channel parame ters as advised by the phone company or tech support or set the outgoing call ID Routing Chapter 8 If you have a router or routers on your LAN Serial Port Chapter 9 If you wish to connect a modem or ISDN TA to the Serial Port for Internet Access only Where use of a certain feature requires that PCs or other LAN devices be configured this is also explained in the releva...

Страница 40: ...lephone answering machine or Fax machine attached to one or both of these ports Figure 19 Analog Ports Screen Data Voice Type This sets the bandwidth available for the analog line The default is Speech The 3 1K Audio option uses more bandwidth but improves sound quality Codec There should no need to change this setting it is determined by the Country setting Japan and the USA use u_law other 5 ...

Страница 41: ...dress Incoming Calls Enter the MSN telephone number and or SAD you wish to assign to each port The attached telephone device will ring only if the incoming call dials the number entered Outgoing Calls If provided receivers of calls made through this port will see this telephone number and the phone company will bill this number You can assign the same number to both incoming and out going calls th...

Страница 42: ...d use of this feature is strongly recommended Normally the default values should not need to be changed The PCs must be configured to act a DHCP clients See page 16 for details of this procedure DHCP Server Screen This screen can be used to Disable the DHCP server function Change the range of IP Address allocated to PCs by the DHCP server Increase the number of DHCP clients which can be accepted D...

Страница 43: ...e DHCP server when it allocates IP Addresses to DHCP Clients This range also determines the number of DHCP clients supported Maximum number of clients is 253 DNS IP Address Enter the IP Address or Addresses you wish the DHCP Server to use Multiple entries should be entered in the order you want them accessed The first available DNS will be used The DNS field will display the DNS entered in the Bas...

Страница 44: ...1 B Channel for Internet access rather than both Set the B Channel line speed to 56K rather than 64K Set the outgoing call MSN and SAD Figure 21 ISDN Screen The Use 2B channels function includes the Bandwidth On Demand BOD feature In the first access request from LAN users Internet Router will establish one B channel only But it will monitor the data traffic in the B channel to establish another B...

Страница 45: ... is no data being transmitted or received Channels Normally both B Channels are used Set this to 1 B Channel if desired B Channel Line Speed The default is 64K Set to 56K only if advised to do so by your phone company B Channel Init String This is normally not needed If required enter the value advised by technical support staff Outgoing Call ID MSN Multiple Subscriber Numbering If provided enter ...

Страница 46: ...er and the Routing table in the Internet Router correctly as described in the following sections See page 42 for an example of configuring both the Internet Router and the Router Internet Router Configuration An entry in the routing table is required for each LAN segment on your Network other than the segment to which this device is attached The routing table is accessed by the Routing link on the...

Страница 47: ...data then change any fields you wish Click Update when finished To Add a New Entry Ignore the drop down box click the Clear Form button and enter the details in the fields provided Click Add when finished Routing Table Data The data in the Routing Table is as follows Destination IP Address The network address of the remote LAN segment For standard class C LANs the network address is the first 3 fi...

Страница 48: ...ration It is essential that all IP packets for devices not on the local LAN be passed to the Internet Router so that they can be forwarded to the Internet To achieve this the Routers must be configured to use the Internet Router as the Default Route Local Router The local router is the Router installed on the same LAN segment as the Internet Router This router Default Route is the Internet Router ...

Страница 49: ...ntermediate router Routing Example Router B 192 168 1 90 192 168 2 70 Router A Segment 0 Segment 2 Segment 1 WideLink 192 168 0 xx 192 168 1 xx 192 168 0 100 192 168 0 1 192 168 2 xx 192 168 1 80 Figure 23 Routing Example For the LAN shown above with 2 routers and 3 LAN segments the required entries would be as follows For the Internet Router s Routing Table The Internet Router requires 2 entries ...

Страница 50: ...uter A s Default Route Destination IP Address 0 0 0 0 Network Mask 0 0 0 0 Gateway IP Address 192 168 0 1 Internet Router s IP Address For Router B s Default Route Destination IP Address 0 0 0 0 Network Mask 0 0 0 0 Gateway IP Address 192 168 1 80 Internet Router s local router ...

Страница 51: ...Internet Router User Guide 44 This page was deliberately left blank ...

Страница 52: ...To use a Serial port device To use the serial WAN port on the Internet Router for Internet Access Use a standard serial cable to connect the modem or ISDN TA to the serial WAN port on the Internet Router Connect the modem or ISDN TA to the phone line and power outlet Configure the Internet Router s Serial Port Configuration screen with details of the attached device and the Internet Account to whi...

Страница 53: ...reveal a screen like the example below Figure 24 Port Configuration Hyperlinks Click the Advanced Port link to switch to the Advanced Port screen for the serial port See page 48 for details Click the Port Status Test link to move to the Status Test screen for the serial port See page 59 for details ...

Страница 54: ...ded upon connection DNS IP Address The DNS Domain Name Server translates names e g microsoft com to IP Addresses Enter the DNS IP address supplied or recom mended by your ISP Connect to this Account by Select Dial up line if you connect by Modem or ISDN TA Select Leased Line Null modem if you have a continuous connection You can then ignore the Dial up Connection section Dial up Connection Details...

Страница 55: ...ds the Initial String would be as follows AT F B1 K3 C1 D2 S0X4 The first command AT F sets the modem to its factory defaults See Appendix B AT Commands for further details Advanced Port Settings Most users should not have to change these settings They are provided for the following situations Your modem uses non standard AT commands Your ISP does not use the standard PPP connection and requires a...

Страница 56: ...nnection remains inactive it is terminated after this time period Allowable range is 0 99 minutes For a leased line set this value to 0 Serial Line Speed Select the speed which is equal to or below the fastest SERIAL line speed NOT phone line speed of your modem Available speeds range from 4 8K to 230 4 K bps Dial Type Select Tone Pulse or Other to match your system For Other you must provide the ...

Страница 57: ...xample if you connect to the Internet via CompuServe you DO need a script file Script File Commands Three commands listed below can be used within a script file Note the following points Items in are optional and the themselves are NOT used Strings must be enclosed in double quotes There must be spaces between commands and parameters times and strings Send msec string Send the characters in string...

Страница 58: ...eed n new line r carriage return t horizontal tab v vertical tab Literal question mark literal single quotation mark literal double quotation mark literal back slash Quote characters are special characters Because each of these variables starts with a backslash the backslash character is also a special character As an example to send the string User Name including the quotes the script file entry ...

Страница 59: ... acter Pause for 100 ms between characters wait 3000 Wait for 3 seconds to receive the character If not received in time the connection is dropped send 100 user id r Send the string user id where user id is your log in name then a carriage return Pause for 100 ms between each character wait 3000 Pause for 3 seconds send 100 password r Send the string password where password is your password then a...

Страница 60: ...P connection Operation When the ISDN link is fully utilized a connection will be made through the serial port s modem or ISDN TA to increase the available bandwidth Note that if using an analog modem there will be a delay of 10 to 20 seconds while this connection is established ...

Страница 61: ...Internet Router User Guide 54 This page was deliberately left blank ...

Страница 62: ...nitoring Overview The Internet Router allows you to connect to it through the LAN while it is operat ing You can monitor the operation of the ISDN link DHCP server and the Serial Port Status Screen Figure 26 Status Screen 10 ...

Страница 63: ...ID The hardware ID of this device used by the manu facturer for identification LAN IP Address The IP Address of this device Network Mask The Network Mask value stored in this device This must match the Network Mask for the LAN segment to which this device is connected DHCP Status If the DHCP Server function in the Internet Router has been Enabled you can check its operation by choosing the DHCP Se...

Страница 64: ...Address allocated by the DHCP server to the other device Physical Address The Hardware Address Network Adapter Address of the device which has been allocated a IP Address Status Possible Status values are Leased the IP Address is allocated to the device shown or Reserved the IP Address is not available ISDN Status By selecting the ISDN Status link on the Status screen you can monitor the opera tio...

Страница 65: ...example screen is shown below Figure 28 ISDN Status ISDN Link Data Physical Link If operating the link will show ON This means the modem was able to connect to the number dialed Line Speed The connection speed over the ISDN link PPP Link If ON a PPP connection was successfully negotiated PPP IP Address The IP Address used by this device This address is provided by the ISP on connection Connection ...

Страница 66: ...PP connection is now being established PPP up fail The PPP connection could not be established PPP up successfully The PPP connection was established successfully Stop PPP The PPP connection was terminated This will occur at the end of a session or an error condition Idle timer expires The Idle time out has been triggered There was no data sent or received for the duration of the Idle time period ...

Страница 67: ...e display with fresh data Status Data Port Status This shows the current port operation Possible values are Internet Access Idle Disabled Physical Link If operating the link will show ON This means the modem was able to connect to the number dialed PPP Link If ON a PPP connection was successfully negotiated Phone Line Speed The connection speed over the phone line between your modem and the number...

Страница 68: ... connection to ISP has been established CONNECT nnnnnn Physical connection was successful nnnnnn indi cates the speed of the serial link as currently configured Max phone line speed nnnnnn bps nnnnnn is the maximum speed of the modem according to the current configuration DCD low DSR low Physical line break connection lost send wait AT commands sent to the modem are displayed as they are sent Comm...

Страница 69: ...0 bps physical line is connected start PPP ppp up successfully Error Conditions The following table shows messages which indicate an error condition and the suggested corrective action No dial tone The modem could not obtain a dial tone Check your connections on the phone line and the modem Busy error The number dialed was busy Check that the number is correct If it is try dialing later If this oc...

Страница 70: ...eck that the modem is ON and properly connected to the Internet Router No carrier No answer There was no response from the phone number dialed Check that the phone number is correct and the modem is working If both of these are OK check with your ISP ...

Страница 71: ...orm a self test with this procedure 1 Disconnect the ISDN phone line 2 Connect a telephone to analog port 1 or 2 3 Pick up the phone The LED associated with the port should light 4 Press the Flash key The LED will start flashing 5 Press the following keys in sequence 0 6 If the ISDN link is OK you will see both analog port LEDs flash slowly and hear the dial tone 7 If you hear a busy tone and both...

Страница 72: ... protocol You can also use the WinIPcfg program by entering WinIPcfg without the quotes in the Run dialog box Problem 2 When I enter a URL or IP address I get a time out error Solution 2 A number of things could cause this Try the following troubleshooting steps 1 If using static IP Addresses ensure that your worksta tions IP settings are correct including IP address default gateway and DNS 2 Ping...

Страница 73: ...h it so it is not transparent Some programs may have limited functionality when used with the Internet Router The number of supported applications is being expanded as rapidly as possible The following applications and protocols are supported by firmware V5 0 Telnet FTP HTTP ping POP SMTP Archie NNTP TFTP IRC Gopher DNS SNMP Real Audio Printer Sharing Problem 1 While adding my printer as instructe...

Страница 74: ...nt server PrintServer as the port for this printer 6 Close the Properties window With the Printer icon still selected goto the File menu and ensure Work Off line is NOT checked 7 If the printer is connected properly and powered On the printer icon should now be enabled and ready for print ing Problem 2 I connected and configured a WPS Windows Printing System printer as described but I can t get th...

Страница 75: ...thing at all Solution 4 If you are using a Post Script printer and enabled the banner option you must also enable the PostScript option Problem 5 When printing from some software applications such as Power Point printing is very slow and contains errors Solution 5 The problem is caused because the printer is configured to Start printing after first page is spooled To change the configuration do th...

Страница 76: ...A Troubleshooting 69 This page was deliberately left blank ...

Страница 77: ... not sufficient a W2 command no AT must be used as well For an ISDN TA the above commands may not be sufficient Check your user manual The following section may also be helpful For a modem which uses the standard AT commands shown above the Initial String would look like the following AT F B1 K3 C1 D2 S0X4 The first command AT F sets the modem to the factory defaults to ensure a consistent startin...

Страница 78: ...omputer then Dial Up Networking 2 Select the icon for your connection then Properties 3 Click the Configure button then the Connection tab as shown below Figure 30 Connection Properties W95 4 Select Advanced to see the screen below ...

Страница 79: ...or another editor to read and print the file MODEMLOG TXT 8 Examine the file to determine the Initial String value AT Commands Most modems use the standard AT commands as shown in the following tables Consult the manual for your modem to set what AT commands it supports Basic AT Command Set Command Description any key Terminate current connection attempt Escape sequence code entered in data state ...

Страница 80: ...or second dial tone Wait for 5 second silence before proceeding otherwise return O ANSWER R Reverse Dial Originate a call in answer mode ATDL Dial last number ATDSn Dial number stored in NVRAM at position n n 0 9 ATEn Command mode local echo of keyboard commands E0 Echo off E1 Echo on ATHn On Off hook control H Hang up modem H0 Hang up on hook same as ATH H1 Get off hook ATIn Display inquired info...

Страница 81: ...dem does not return result code Q2 Return result code but quiet in answer mode will not show in AT Vn ATS0 n Number of rings required before modem answers n 0 disables auto answer ATSr b n Set bit b of S register r to n 0 or 1 ATSr b Inquiry bit b of S register r ATSr n Set S register r to value n where n is a decimal number between 0 255 ATSr Display value stored in S register r ATT Tone dial ATV...

Страница 82: ...mands Command Description Bn Data rate terminal to modem B1 DTE DCE rate fixed at DTE setting Cn Carrier Detect operations C1 Carrier Detect tracks presence of carrier Dn Data Terminal Ready DTR operations D2 DTR off causes modem to hang up F Load the default factory settings Kn Data flow control DTE DCE n 0 3 4 K0 Flow control disabled K3 Hardware RTS CTS flow control K4 Software XON XOFF flow co...

Страница 83: ...IP protocol Configure Peer to peer networking Install Network Cards Drivers 1 Install a Network card NIC on each PC Follow the instructions provided with the NIC 2 Connect cables from each PC to the hub 3 Restart each PC and install the drivers for the Network card Follow the instruction provided with the NIC 4 If you need to change the drivers used by your NIC follow this procedure Go to Settings...

Страница 84: ...rhood icon on the desktop and right clicking to select Properties 2 The Configuration tab of the Network Properties screen will appear An example screen is shown below Figure 32 Network Properties 3 If a line like the one highlighted TCP IP NIC is not listed select Add Protocol Microsoft TCP IP OK to add it 4 Select Properties for the TCP IP NIC entry You will see a screen like the following ...

Страница 85: ...P information IP Address Subnet Mask Gateway and DNS to your PC when it boots If you don t wish to use a DHCP Server you must give each PC a unique IP Address and the same Subnet Mask Peer to Peer Networking To enable PCs to communicate with each other On the Identification tab of Network Properties see Figure 32 each PC needs a unique Computer Name but the same Workgroup Only PCs in the same Work...

Страница 86: ...access To gain access to shared resources on other PCs Select the desktop icon Network Neighborhood and then browse the network by double clicking Entire Network Wait a few seconds and you will see all PCs which Are Powered On In the same workgroup Have enabled File and Printer Sharing Double click on a PC to view the resources it has made available for sharing To gain access to a folder or drive ...

Страница 87: ...70 C Network Protocol TCP IP Network Interface 4 10BaseT UTP connectors ISDN Port RJ45 connector S T interface 4 wire full duplex AMI line code Serial Port 1 male DB 9 connector Serial Port Speed 230 4 Kbps max async LEDs 1 Power indicator 3 LAN status 3 ISDN Status 3 Serial port status 4 LAN connection status on rear Power Adapter External 12V DC D ...

Страница 88: ...nterface 4 10BaseT UTP connectors ISDN Port RJ45 connector S T interface 4 wire full duplex AMI line code Analog port POTS 2 R interface port RJ11 connectors Serial Port 1 male DB 9 connector Serial Port Speed 230 4 Kbps max async LEDs 1 Power indicator 3 LAN status 3 ISDN Status 3 Serial port status 2 Phone status 4 LAN connection status on rear Power Adapter External 12V DC ...

Страница 89: ...Network Interface 4 10BaseT UTP connectors ISDN Port RJ45 connector S T interface 4 wire full duplex AMI line code Serial Port 1 male DB 9 connector Max Serial Port Asyn Speed 230 4 Kbps Parallel port 1 Centronic female DB25 connector LEDS 1 Power indicator 3 LAN status 3 ISDN Status 3 Serial port status 2 Phone status 4 LAN connection status on rear Power Adapter External 12V DC ...

Страница 90: ...connectors ISDN Port RJ45 connector S T interface 4 wire full duplex AMI line code Analog Port POTS 2 R interface port RJ11 connectors Serial Port 1 male DB 9 connector Max Serial Port Asyn Speed 230 4 Kbps Parallel port 1 Centronic female DB25 connector LEDS 1 Power indicator 3 LAN status 3 ISDN Status 3 Serial port status 2 Phone status 4 LAN connection status on rear Power Adapter External 12V ...

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