Xpert/XLite PPP SLL Users Manual
Contents
1. SLLs One such library is PPP sll which adds the ability for the Xpert to communicate using the Point to Point protocol over serial communications links While the PPP SLL permits the two way transmission of SSP Sutron Standard Protocol messages over various devices which support PPP its usage is much broader because when the PPP driver is turned on it enables a network stack on the RTU that permits other forms of TCP IP communications For instance a Basic program could initiate an FTP file transfer or a remote user might access the Xpert s home page On Windows PCs the PPP protocol is typically supported by Dial up Networking and PPP SLL may in fact be used to connect the Xpert to a Dial up ISP with a standard Hayes modem This document is the user manual for PPP sll The following topics are discussed e How to install the library e What part of the PPP standard is supported by the library e How to configure the Xpert for PPP communications e Diagnostics Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 2 NEW FEATURES Versions 3 11 0 2 2 11 0 3 and later e Full AT Support option added to the PPP Options dialog Unchecking this box will eliminate some of the standard AT initialization commands that modems without full AT compatibility may not support2. IP is a reliable protocol SSP s retry mechanism is not used although CRC checks are still performed The following SSP opcodes are supported by the built in SSP server OpSetClock OpTimeTagReq OpSetupReq OpTagInfo OpMail OpReset OpStartSDL OpStopSDL OpCurdataReq OpValueReq OpStartTag OpEvalTag OpStopTag OpBeginControl OpSelectControl OpSelfTest OpClearStatus OpGetStatus OpEraseSetup OpValue OpSaveSetup OpRDIReq and OpRDI The PPP SSP server does not support cross device repeating but alarm and alert messages are Mail messages may be sent to test a link and the PPP status can also be retrieved Other TCP IP services provided by the Xpert2 such as Remote s Telnet server may be remotely accessed but those capabilities are not discussed here Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 4 INSTALLING AND CONFIGURING PPP SLL This section describes the installation and configuration of the PPP sll library Installation PPP sll is required for PPP operation To install the library copy the PPP sll file to the Flash Disk subdirectory of your Xpert using Xterm For more information on performing this file transfer please refer to chapter 6 of the Xpert or 9210 user manual Once the files have been transferred reboot the Xpert The libraries will load au
3. Number of transmissions that failed Clear Clears the statistics On Indicates whether the PPP Device is currently powered on ON Turns the radio on button OFF Turns the radio off Check Mail Displays any SSP mail messages received by the PPP SSP Server Send Mail Sends an SSP mail message This is a good means for testing end to end communications Get Status Reserved for displaying device specific status information Clr Status Reserved for clearing device specific status information Next tx When the next scheduled current data transmission will be made Last tx The time of the last current data or alarm transmission The message counts only apply to messages transmitted or received by the PPP SSP Server see RxPort or related to PPP current data or alarm reporting Testing can also be performed using the 9210 s Front Panel interface The abilities are very similar to the GUI dialog Here is a list of the options Show SSP Stats Get Status lt gt choose select lt gt choose select Force Power OFF lt gt choose select Check Mail Clear Status lt gt choose select lt gt choose select Exit PPP Test Menu exit Send Mail Force Power ON lt gt choose select lt gt choose select Notes 1 The mail message defaults to TEST MESSAGE When prompted for Bytes to Send you may issue a length up to 999 bytes If you in
4. is used with the serial port communicating with the PPP device Because SSP uses long buffers and smart devices can introduce indeterminate transmission delays it is highly recommended to enable H W flow control To function correctly RTS CTS flow control must also be enabled in the modem The standard Hayes command for doing this is ATK3 lt cr gt or just K3 if added to the Modem Initialization string However since other commands will be sent to the device before the Modem Initialization string is sent it s recommended that this setting be stored in the default profile With a Hayes compatible modem connected to COM2 this is how you would manually do so from command line Flash Disk gt PASSTHRU COM2 Passthru operation has begun press ESC ESC ESC to abort AT OK ATK3 amp W OK Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Protocol Negotiation Compression Encryption Gateway LCP CHAP EAP PAP MsCHAP MsCHAP2 Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 esc esc esc Flash Disk gt PPP or SLIP may be selected SLIP is an older standard for creating a Dial up connection that cannot auto negotiate features like PPP and hence the IP and DNS must be specified If possible always use PPP However if PPP doesn t seem to work with or is not supported by your hardware yo
5. serial configuration settings select the PPP entry and press Edit The following dialog appears There are five dialogs for configuring the PPP properties the main PPP Setup Dialog three other secondary dialogs that can be accessed by pressing the More button and a 5 dialog accessed by pressing the Options button in the PPP Connection Settings Dialog PPP Setup Connection ES 115200 Power Settings Time 00 00 00 fal StayOn ano E Interval fo1 00 00 Messaging Tx Rate foo 00 00 Le _ Disable Alerts Alarm Rt 00 00 00 Figure 3 PPP Setup Dialog Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 7 The PPP Setup dialog allows the configuration of the most common options for connecting controlling power and messaging and provides buttons to access further options in each category Here are the options provided by this dialog Port This defines the serial port the PPP device will be connected to lt None gt will disable PPP support To use a serial port for PPP you will need to make sure it s not already in use for something else Selecting lt LAN gt will disable use of the PPP protocol and instead allow the Xpert s built in LAN to be controlled by the PPP SLL This option would only be used when the power d
6. 3 sections Connection Setup lt gt choose select Power Setup lt gt choose select Messaging Setup lt gt choose select Exit PPP Setup Menu exit Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Front Panel Connection Setup Menu Rev 3 11 8800 1189 12 2012 Set ComPort lt gt choose select Set UserName lt gt choose select Set Connect Timeout lt gt choose select Set BaudRate lt gt choose select Set Password lt gt choose select Set HWFlow lt gt choose select Set UseAPN lt gt choose select Set UselpAddr lt gt choose select Set UsePPP lt gt choose select Set APN lt gt choose select Set IpAdar lt gt choose select Set Options lt gt choose select Set PhoneNumber lt gt choose select Set UseDNS lt gt choose select Exit Connection Menu exit Set ModeminitString lt gt choose select Set DNS lt gt choose select Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SL
7. If you just configured a serial port for the first time have you tried rebooting the unit 5 Observe the PPP diagnostics page while a connection is attempted and verify that connections are being scheduled and watch for an issue during the connection negotiation 6 Verify that the PPP device is being powered up correctly by pressing ON in the PPP diagnostics page 7 Issuing report high or even report debug at the command prompt is a good means to get real time diagnostic information about the performance of the PPP SLL and the system in general You can monitor SSP messaging by issuing report ssp 8 The system status page will show information about the most recent diagnostic messages and the current state of the PPP device This can also be displayed on demand at the command prompt with the info command 9 The system log can be examined to look for status messages 10 Use the PPP Diagnostic page to send test mail messages Be sure to try some messages with a long length ex 1000 bytes to make sure that flow control is working correctly 11 Contact Sutron Customer Support at 703 406 2800 Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com
8. L Users Manual Front Panel Power Setup Menu Rev 3 11 8800 1189 12 2012 Set Time lt gt choose select Set OffDelay lt gt choose select Set InvertOutput lt gt choose select Set Interval lt gt choose select Set UseDiglO lt gt choose select Exit Power Menu lt gt choose select Set StayOn lt gt choose select Set Module lt gt choose select Set WarmUp lt gt choose select Set Channel lt gt choose select Front Panel Messaging Setup Menu Set Tx Time lt gt choose select Set SecondarylP lt gt choose select Set RxPort lt gt choose select Set Tx Rate lt gt choose select Set TxPort lt gt choose select Set RequireLogin lt gt choose select Set Alarm Rate lt gt choose select Set UseTxPassword lt gt choose select Set TxTimeout lt gt choose select Set DisableAlerts lt gt choose select Set TxPassword lt gt choose select Exit Messaging Menu exit Set PrimarylP lt gt choose select Set UseRxPort lt gt choose select Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporati
9. Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 wwv PPP Setup Fl lt None gt gt 15200 15 00 More Power Settings Time 00 00 00 StayOn ano Interval 01 00 00 Messaging Tx Rate 00 00 00 e L Disable Alerts samre paroon Part No 8800 1189 Version 3 11 December 20 2012 Table of Contents Bint UNC Ul OTT TTETTTTTTTTTTTTTETTTTTTTTTETTTTTTTTTTTTTTTTTETTTTTESTE 3 NEW FEATURES scen E E ON AAA EO KAS DELA 4 Supported PPP Features ss eo Ja ko a EO SANZ 5 Communication PON sss sko bad mn 5 S tron Standard PLO 0 00 sp KEO EE NGA 5 Installing and Configuring PPP GU x noel ant ra 6 Jostal sin sr TTT whee ea weeds a ie 6 Before getting SE o oK Kro Sa T IONMO TCA ON enai ereer ALAN Lk Kk E E a kel 8 Front Panel Connection Setup MONE sas ones 17 Front Panel Power Setup Menu sas E E A 18 Front Panel Messaging Setup Menu 18 Testing PPP OB AUS nn ten aK KNK 19 The PPP Vest DOS ass ed sra kaaas 19 Troubleshooting o E E E ado 21 Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 ri INTRODUCTION Sutron s Xpert family of DCPs both the 9210 and the Xpert hereafter referred to as the Xpert have been designed to be easily expandable by adding additional software libraries called Sutron Link Libraries
10. al I O output port When Dig I O is selected an I O Module and Channel may be selected This output will be turned on before a PPP or a lt LAN gt connection is attempted The output is assumed to be open collector hence on means OV is output If the output instead uses positive logic the Invert Output box may be checked WarmUp The number of seconds to allow the PPP device to warm up after asserting power before trying to establish a connection OffDelay Minimum number of seconds to leave the device powered on after any type of power on event For example an alarm message will power up the device outside of the normal power interval and leave it on for OffDelay seconds This allows a period of time when other messages may be sent without incurring the penalty of powering down and back up the device and or a master station may send requests Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 12 PPP Messaging Settings Outgoing Tx Time bo 00 00 Primary IP TxPort F3 Hl Password Incoming _ RxPort oo l Require Login Figure 7 Messaging Settings The PPP Messaging Settings dialog provides additional options related to transmitting messages to the PPP device Here are the options provided by this dialog Tx Time Base time for sending tim
11. al Rev 3 11 8800 1189 12 2012 8 PPP Connection Settings Init string Eov18ciso2 Mm User name Timeout Password m sec IP addr E fo Los E AT and cr are automatically added Figure 4 PPP Connection Settings Dialog The PPP Connection Settings dialog provides details for connecting to a PPP device or a GPRS radio Here are the options provided by this dialog APN The Access Point Name option used for GPRS communications and may be left unchecked when using a PPP device Enabling APN helps prepare the initialization strings and phone number for use with a GPRS radio and allows the APN for the radio to be specified this setting varies depending on the Cell service provider Phone The phone number to dial to connect to the service provider When APN is checked this is automatically filled in with the dialing string used by the Sutron and other GPRS radios Init String This string is sent to the PPP device before making a connection The default settings EOV1 amp C1 amp D2 turn off echo DO enables result codes V1 enables CD reporting amp C1 and allows DTR to hang up amp D2 Other options may be tacked on to these default values The string AT is automatically issued before the init string and a lt cr gt is automatically appended Modems and radios which support PPP generally support the Hayes AT Command set but there may be extensions or limitations
12. checking the Gateway option in the PPP options but initially you should just go to the LAN Settings Setup entry and turn it off LAN Settings Current State o oj Auto can save some power over On when LAN cable is normally unplugged Lan Configuration LAN is in use by View Config Figure 1 Turning the LAN off Configuring the serial ports for PPP operation may require changes to the registry that will require a reboot before they take effect When this situation can be detected you will be notified of the need to reboot However it cannot always be detected If you experience any difficulties establishing a connection when setting up a port for the first time try rebooting the Xpert Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 6 Configuration There are two visual components added to the Xpert by the PPP sll library The first and the one this section discusses in detail is an entry under the Setup tab named PPP see Figure This entry is used to configure how Xpert talks PPP over a selected communication port man Setup Sensors PPP J Loa J Data statu tl Basic H Coms H EZSetup Measurements H Graphical Setup 1 0 Modules LAN Settings Log files i Satlink Figure 2 The PPP Control Panel Entry To access the dialog containing the
13. crease the number the message will be copied over and over to fulfill the desired length 2 The SSP Stats option will flash the PPP status on the screen for 2 seconds the power state for 2 seconds the time of Next Tx for 2 seconds the time of Last Tx for 2 seconds and then finally the SSP stats for 5 seconds Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 19 3 The Get Status option will show a scrolling box displaying a device specific status Press when finished viewing This command is currently not supported Troubleshooting 1 Did you check to make sure that Remote Coms Basic or any other part of the system isn t trying to use the com port you wish to use for PPP Issuing status at the command prompt will list all ports that Remote has been configured to support 2 Did you check to make sure the LAN device is turned off 3 Have you configured your PPP device with H W flow control enabled by default You may also wish to clear out any inadvertent settings by setting the device back to factory defaults For a standard Hayes compatible modem you would issue the command AT amp F lt cr gt to restore factory defaults H W flow control is typically enabled by issuing ATK3 lt cr gt and the new settings can be made permanent by issuing ATE W lt cr gt 4
14. devices in the Xpert This option allows the use of the Password Authenticated Protocol PAP uses plaintext unencrypted passwords and is the least sophisticated authentication protocol This option allows the use of the Microsoft Challenge Handshake Authentication Protocol MS CHAP is similar to CHAP but is compatible with Microsoft networking standards This option allows the use of the Microsoft Challenge Handshake Authentication Protocol version 2 0 MS CHAP v2 was introduced as a Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 11 more secure variation of MS CHAP Full AT Unchecking this box will eliminate some of the standard AT initialization Support commands that modems without full AT compatibility may not support Be sure to place any initializations your modem does need in the Init String Power Settings Power Control Module fi I Cancel Channel fi I Invert Output L WarmUp fo OfIDelay ko Figure 6 Power Settings Dialog The Power Settings dialog provides additional options related to powering up the PPP device Here are the options provided by this dialog Power When a serial PPP connection is made DTR is always asserted to the Control device In addition power to the device may be controlled by a digital switch or relay controlled by a Digit
15. e On the PPP status page the ON OFF and Send Mail operations may now be performed asynchronously in the background e When power is manually turned ON or OFF it should stay ON or OFF until the next cycle Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 3 SUPPORTED PPP FEATURES This section discusses PPP support in the PPP sll library Communication Ports This library supports PPP messaging over RS 232 asynchronous serial transmission e g EIA TIA 232 or EIA TIA 485 Hardware flow is recommended The data rate is selectable with no parity 8 data bits and 1 stop bit The com port to use is selectable COM2 thru COM9 GPR2 GPR4 and must not already be in use by Remote and or Coms sll Before communicating with the PPP device it is turned on this is done by asserting DTR and RTS and or a Digital I O line if desired When LAN is selected as the communication port the PPP protocol is bypassed and the Xpert s Ethernet port is controlled This permits the same power scheduling and transmission options of the PPP sll to be used with a device that features an Ethernet interface Many devices support the PPP protocol over RS 232 this includes standard dial up modems as well as GPRS Radios and custom Radios Sutron Standard Protocol PPP sll uses SSP messages over TCP IP As TCP
16. ed current data transmissions You may offset this from the power on time to account for the WarmUp delay but it s not strictly necessary as a transmission is not sent until a PPP connection has been made Primary IP An IP address or URL specifying the Xconnect Tempest SutronWIN etc server to send SSP messages to Secondary IP Ifa message could not be sent to the Primary IP then an attempt will be made to the Secondary IP unless the field is blank TxPort The TCP IP port number that the server is listening on for an incoming SSP message UDP is not supported Password When the password option is checked and a password is entered then a SSP login will be performed prior to sending a message to the server The RTU s station name will be sent as the user name and the password entered in this field will be provided This is meant to authenticate that the RTU is authorized to provide data RxPort If enabled with the check box RxPort specifies the TCP IP port that PPP SLL will listen on for SSP messages This server supports a traditional SSP command set meant for data collection and control and includes the ability to poll for current data as well as time tagged data Other TCP IP services provided by the Xpert are also available and their port numbers should be avoided ex 23 for Telnet 80 for HTTP Require Login If Require Login is checked then a client trying to access the PPP SLL s SSP server will be required to login befo
17. on Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 17 TESTING PPP OPERATIONS This section describes how the PPP Test dialog may be used to test out PPP communications The PPP Test dialog may be accessed by selecting the PPP tab The PPP Test Dialog The PPP Test Dialog as shown in Figure 8 may be used to test SSP communications over PPP and examine the communication status Sensors Log Disabled 15 55 38 Good Total Figure 8 PPP Test Dialog The fields in the PPP Test dialog are defined as follows Status The first line in the dialog shows the current status and can show various information related to the connection progress and power status scheduling Time The current time is displayed Rx Good The number of SSP messages received that were address to this station The SSP station ID is the same as the Station Name defined on the Main page Rx Total Total number of messages received including ones not addressed to the station Rx Bad Bad messages May indicate that the message itself wasn t assembled correctly as TCP IP messages are error corrected and CRC errors should not occur at the SSP level Tx Good Number of messages sent that appeared to go thru Tx Total Number of messages attempted Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 18 Tx Bad
18. raw of the LAN and connected devices is too high to leave on all the time For this to work the LAN must be first turned OFF in the LAN Settings entry under the Setup tab GPR2 GPR3 and GPR4 are virtual devices which will allow the PPP sll to work with Sutron s GPRS radio on COM2 COM3 and COM4 respectively While PPP sll is communicating with the radio and creating an internet session using one of the GPRx ports a Basic program could access the radio using the corresponding SMSx port permitting simultaneous TCP IP GPRS and SMS GSM operation Data Rate The serial data rate may be selected In general there s no reason not to take advantage of the highest rate 115 200 bps Time Base time to automatically power up the radio Interval How often to automatically power up the radio StayOn The number of seconds to leave the radio on for during an automatic power on period Tx Rate How often to send SSP current data messages when the system is not in alarm 00 00 00 will disable this feature Alarm Rt How often to send SSP current data messages when the system is in alarm 00 00 00 will disable this feature Disable When a sensor goes in to Alarm an Alarm message will automatically be Alerts transmitted to the PPP device unless Disable Alerts is checked Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manu
19. re it can send commands The Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 B standard system user names and passwords are used Timeout sec This is how long to wait in seconds for an acknowledgement of a transmitted message before reporting a failure The number will vary with the latency of the device and the network but the default of 10 seconds should provide sufficient slack in most cases Typically a connection which is not working will fail outright A server receiving a message but not replying to it would be an abnormal situation as TCP IP performs error detection and recovery Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 14 These same configuration options may be selected and edited using the 9210 s front panel display First select the PPP Menu from the main menu and press to enter PPP lt gt choose options From inside this menu you may select from either PPP Test lt gt choose options PPP Setup lt gt choose options Exit PPP exit The PPP Test menu is listed at the end of the TESTING section of this manual the setup menu is broken up in to
20. specific to each piece of hardware User name A user name is typically required and provided by the service provider Password A password is typically required and provided by the service provider IP addr When left unchecked the IP addr will be automatically provided by the service provider but if you wish to specify a fixed IP addr you may check this box and enter the static address you wish to use DNS When left unchecked the DNS server will be automatically provided by the service provider but if you wish to specify a fixed DNS you may check the box and enter the address you wish to use Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 9 Timeout This is a timeout in seconds for how long to wait for a connection to be made Depending on the device and type of service the time required to connect can be fairly long and hence the default is 60 seconds PPP Options _ Encryption _ Gateway M LCP PAP M CHAP M MsCHAP M EAP MsCHAP2 M Full AT Support Figure 5 PPP Options Dialog The PPP Options dialog provides even more options related to connecting to a service provider The defaults are generally acceptable but a specific device may require a specific configuration Here are the options provided by this dialog Flow This setting determines if H W flow control RTS CTS
21. tomatically after the Xpert reboots To uninstall the libraries use Xterm to delete the files from the Flash Disk subdirectory This can only be done when the Xpert application is not running select Exit App from the Status tab In order for the libraries to load and operate correctly the versions of the files must be the same as the version of the application loaded into the Xpert This is usually not a concern because the same versions of the slls and application are typically packaged together Should the need arise to verify that the versions are the same the version of a sll as it resides on the PC can be determined by looking at the file s properties right click on the file and select the Version tab The version of the Xpert application is given by the application itself at the top of the About dialog which is accessed from the Status tab Sutron Corporation 22400 Davis Drive Sterling VA 20164 703 406 2800 www sutron com sales sutron com Sutron Corporation Xpert XLite PPP SLL Users Manual Rev 3 11 8800 1189 12 2012 5 Before getting started Typically the purpose of using the PPP SLL is to provide internet services to an RTU and hence the LAN is not available and not used but during initial testing setup it s very convenient to take advantage of it The problem is that if the internal LAN is turned on then PPP messages will be sent using the LAN and not the PPP device You can change this behavior by
22. u might try SLIP These options enable certain capabilities of the PPP protocol Some of them may or may not be compatible with a specific implementation of the protocol or may be too insecure for your network policy and hence they can be enabled or disabled as needed Enables IP header and data compression of the data sent over the link Requires the data and password to be passed in encrypted form or the connection will be refused Causes the PPP connection to be treated as the RTU s primary gateway to the internet This means that even if the high speed LAN is turned on the PPP connection will be used to route packets to the Internet WAN Hence with Gateway enabled turning on and off the LAN will not affect PPP messaging It s simplest to just turn the LAN off when using PPP and to turn PPP off when using the LAN but it is possible to have both enabled at the same time This option allows LCP extensions a part of the PPP protocol to be used You can try turning them off to help diagnose a problem establishing a PPP connection This option allows the use of Microsoft Challenge Handshake CHAP uses a challenge response scheme using a MDS hash The password is never sent directly This option allows the use of the Extensible Authorization Protocol EAP was introduced to support advanced security methods such as token cards smart cards and certificates However there is currently not a means to configure such security
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