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Modem Configuration Checklist

Troubleshooting

B-4

B.5 Modem Configuration Checklist

Most modem problems are caused by cabling mistakes or incorrect modem configuration.
However, the following items should be verified after any modem configuration, and re-
checked when there is modem trouble.

◆

The modem must be configured to disconnect immediately when DTR is de-
asserted.

◆

The modem must assert CD (or DSR, if connected) when connected to another
modem. It must not assert CD when disconnected. The modem may optionally assert
CD during outbound dialing.

◆

The modem and MSS must agree on the flow control method and baud rate scheme.

◆

The modem must not send result codes or messages to the MSS except optionally
during outgoing calls.

◆

The modem should be set to restore its configuration from non-volatile memory
when DTR is dropped.

◆

The modem should be configured to answer the phone if incoming connections are
to be supported. Generally this is done with the ats0=1 command.

◆

The modem should not be configured to answer the phone unless the MSS asserts
DTR.

◆

Modem control must be enabled on the MSS. Using modems on ports without
modem control enabled will lead to security problems.

◆

The MSS Autobaud feature should be enabled only when required.

B.6 Entering Commands at the Boot
Prompt

If the Boot> prompt appears on the serial console instead of the Local> prompt, one of two
things may be wrong. Either the MSS does not have enough information to boot, or the
network or flash reloading procedure has failed. If pressing the Return key does not
display a prompt, press any other key. The Boot> prompt should appear.

If the MSS does not have enough information to boot, or the network or flash reloading
procedure has failed, it will print a message to the console and wait ten seconds for serial
port activity. If the MSS detects serial port activity, it will continue booting provided the
flash is good. However, if the user presses a key during that time period, the MSS will
display the Boot> prompt.

Note:

If you see the message “Will attempt another download in x minutes,”
press any key for the Boot> prompt.

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Summary of Contents for MSS4-D

Page 1: ...MSS Installation Guide For MSS4 Device Servers ...

Page 2: ...limits are designed to provide reasonable protection against such interference when operating in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with this guide may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause interference in which cas...

Page 3: ...g PC Cards 2 7 2 3 1 Installing an 802 11 Card 2 7 2 3 2 Installing an ATA Flash Card 2 8 2 3 3 Installing a Modem Card 2 9 3 Getting Started 3 1 3 1 System Passwords 3 1 3 1 1 Privileged Password 3 2 3 1 2 Login Passwords 3 2 3 2 IP Address Configuration 3 3 3 2 1 Using EZWebCon 3 3 3 2 2 Using ARP and Ping 3 4 3 2 3 Using a DHCP BOOTP or RARP Reply 3 5 3 2 4 Using the Serial Console 3 5 3 3 Inco...

Page 4: ... 9 4 4 Serial Port Configuration 4 9 4 4 1 Access Mode 4 9 4 4 2 Autostart 4 10 4 4 3 Serial Data 4 11 4 4 4 Baud Rate 4 12 4 4 5 Character Size Parity and Stop Bits 4 12 4 4 6 Flow Control 4 13 4 4 7 Modems and Modem Signaling 4 13 4 4 8 Logouts 4 15 4 4 9 Preferred Port Host 4 16 4 4 10 Dedicated Port Host 4 16 4 5 802 11 Configuration 4 16 4 5 1 802 11 Terms 4 17 4 5 2 Enabling 802 11 Networkin...

Page 5: ...5 9 5 5 Serial Tunnel 5 10 5 5 1 TCP Configuration 5 10 5 5 2 UDP Configuration 5 11 5 6 Multihost Mode 5 11 5 6 1 Enabling Multihost Mode 5 12 5 6 2 Adding Hosts 5 12 5 6 3 Removing Hosts 5 12 5 7 Modem Emulation Mode 5 13 5 7 1 Modem Mode Commands 5 13 5 7 2 Wiring Requirements 5 14 5 8 COM Port Redirector 5 15 A Contact Information A 1 A 1 Problem Report Procedure A 1 A 2 Full Contact Informati...

Page 6: ...1 Obtaining Software D 1 D 1 1 Via the Web D 1 D 1 2 Via FTP D 1 D 2 Reloading Software D 2 D 2 1 Reloading Sequence D 2 D 3 Troubleshooting Flash ROM Updates D 3 E Specifications E 1 E 1 Power Specifications E 1 E 1 1 MSS4 Screw Terminal Power E 1 E 1 2 MSS4 D S Adaptor E 1 E 1 3 MSS4 DFP SFP Adaptor E 1 E 2 Environmental Information E 2 E 2 1 Temperature Limitations E 2 E 2 2 Relative Humidity L...

Page 7: ...ernet flash storage and modem cards Note For a current list of supported PC card technologies please check the Lantronix Web site www lantronix com Parts of this manual assume knowledge of the IEEE 802 11 Standard governing wireless networking If you are not familiar with wireless networking concepts and implementation please refer to the Standard or the documentation that came with your wireless ...

Page 8: ...MSS allows you to configure server information via a JavaScript enabled web browser For more information see Web Browser Login and Configuration on page 3 6 Remote Configuration The MSS can be logged into and remotely configured via a network login a Telnet login to the remote console port EZWebCon or a web browser connection to the MSS s internal HTTP server Context Sensitive Help Context sensiti...

Page 9: ...Ethernet The protocol specifies a certain arrangement of data in the Ethernet packets and provides different services for its users TCP IP support includes Telnet Rlogin UDP DNS and WINS The Telnet terminal protocol is an easy to use interface that creates terminal connections to any network host supporting Telnet Rlogin is a protocol that allows users to initiate a TCP IP login session UDP User D...

Page 10: ...hine Session A logical connection to a service A typical session is a terminal connected to a host through the server 1 5 About The Manual The rest of this documentation is divided into chapters as follows Chapter 2 Installation explains the MSS connectors and the installation process Chapter 3 Getting Started contains configuration information to get the unit up and running Read this chapter in i...

Page 11: ...s on page 2 1 How to install the MSS4 in a wired networking environment see Installing in a Wired Network on page 2 5 How to install an 802 11 card in the MSS4 for use in a wireless networking environment see Installing an 802 11 Card on page 2 7 How to install an ATA Flash card Installing an ATA Flash Card on page 2 8 How to install a modem card Installing a Modem Card on page 2 9 Basic knowledge...

Page 12: ...blocks and an RJ45 Ethernet connector The MSS4 SFP also has a 100BASE FX fiber link Ethernet connector Figure 2 2 MSS4 S SFP Front Panel 10 100BaseT Serial 1 Console Serial 2 Serial 3 Serial 4 100BASE FX PCC1 PCC2 Link OK Serial1 Serial2 Serial3 Serial4 RJ45 Ethernet Port Fiber Link Ethernet DFP only DB9 Serial Ports DB9 Serial Console Port 10 100BaseT Serial 1 Console Serial 2 Serial 3 Serial 4 1...

Page 13: ...t meanings depending on what type of PC card is currently in use Note On MSS models that do not have PC card slots the PC Card LEDs will never light up The following tables explains the function of the LEDs Table 2 1 MSS4 LEDs LED Function Serial 1 4 Blinks green to indicate MSS serial activity OK Blinks yellow green or red to indicate MSS activity Link Glows green or yellow to indicate a wired Et...

Page 14: ...ted No card inserted No card inserted Green Solid 802 11 link established PC card ready for use PC card ready for use PC card ready for use Green Blinking Negotiating settings with AP or ad hoc peer PC card is not properly formatted n a Red Solid PC card hardware failure PC card hardware failure PC card hardware failure Red Blinking PC card not read or supported PC card not read or supported PC ca...

Page 15: ... Network 1 Connect the MSS to a serial device Note that all serial ports are initially configured for RS 232 networking A Connect one end of a serial cable to either one of the MSS DB9 connectors or screw terminal blocks depending on the model See Appendix C for MSS connector pinout information Note For the first connection you may want to connect a serial terminal to the console port designated a...

Page 16: ...nt of the MSS 3 Supply power to the MSS This can be done through either the MSS power jack or the screw terminal power connector Do not supply power to both the power jack and the screw terminal at the same time A Connect one end of a power connector to the MSS via one of the following Connect the barrel jack end of the power cable to the MSS power jack Connect power to the 9 30V screw terminal po...

Page 17: ...ere are a couple ways to check Wait for approximately 30 seconds after powering the unit up If the Link LED is solidly lit and the OK LED blinks green once every two seconds the MSS is operating normally If you have connected a serial terminal to the console port press the Return key You should see several lines of start up messages followed by a Local prompt 2 3 Installing PC Cards The following ...

Page 18: ...card inserted in the corresponding PC card slot When the PC card LED corresponding to the installed card is solid green the MSS is ready for use If your PC card LED is any other color refer to Table 2 1 on page 2 3 for information on what that color means 2 3 2 Installing an ATA Flash Card Follow these steps to properly install supported ATA flash and disk storage cards 1 Power off the MSS by remo...

Page 19: ...d the card will appear as Port 5 regardless of which slot it is in If two cards are installed the card installed in the top slot slot 1 will appear as Port 5 and the card in the bottom slot slot 2 will appear as Port 6 If you are an SDK user you can access the port by using device tt4 for port 5 or tt5 for port 6 Follow these steps to properly install supported modem cards 1 Power off the MSS by r...

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Page 21: ...nfigure the MSS Most configuration commands require privileged user status Connecting a terminal to a serial port or logging into the remote console port does not automatically create privileged user status you must enter the Set Privileged command to become the privileged user see Privileged Password on page 3 2 The MSS IP address must be configured before any TCP IP functionality is available se...

Page 22: ...privileged user can change the privileged password Figure 3 2 Changing Privileged Password 3 1 2 Login Passwords Login passwords for all connections except remote console logins port 7000 are disabled by default The login password is always required for remote console logins The default login password for all connections is access To specify a new login password use the Change Server Loginpass com...

Page 23: ...ons enter the Change Password Incoming Enabled command The command allows you to specify the serial ports for which you want to provide password proection Figure 3 6 Enabling Password Protection for Network Socket Connections 3 2 IP Address Configuration Note When you set an IP address you may also need to change the subnet mask from the default subnet configuration See Subnet Mask on page 4 2 for...

Page 24: ... from the first directed IP packet it receives On a UNIX host create an entry in the host s ARP table and substitute the intended IP address and the hardware address of the server then ping the server see Figure 3 7 This process typically requires superuser privileges Figure 3 7 Entering ARP and Ping UNIX On a Windows host type ARP A at the DOS command prompt to verify that there is at least one e...

Page 25: ...ased documentation pages for configuration information Keep in mind that many BOOTP daemons will not reply to a BOOTP request if the download file name in the configuration file does not exist If this is the case create a file in the download path to get the BOOTP daemon to respond BOOTP and RARP are enabled by default on the MSS If you wish to disable them use the Change BOOTP Disabled and Change...

Page 26: ... are enabled by default This behavior can be changed with the Change Incoming command and one of the following parameters Telnet Enables incoming Telnet logins None Disables all incoming logins For security reasons you may wish to disable incoming logins Incoming logins for a port can be disabled with the Change Access command see Access Mode on page 4 9 for more information Note Access to the rem...

Page 27: ...ram offers a simple interface that prompts you for the information necessary to configure the server Instructions for installing running and using EZWebCon are included on the CD ROM 3 3 1 3 Telnet To log into the MSS type telnet followed by the MSS IP address The MSS must have an IP address assigned in order for this command to work Figure 3 13 A Telnet Connection 3 3 1 4 Rlogin Rlogin allows use...

Page 28: ...annot be disabled This ensures that administrators will always be able to log into the port To connect to the remote console port use the Telnet command followed by the MSS IP address and the remote console port number 7000 You will have to enter the login password The default login password is access For more information on the login password see Login Passwords on page 3 2 After you issue the ap...

Page 29: ...bout incoming and outgoing connections Note If you Telnet into the MSS you cannot make outgoing connections To start an outgoing Telnet session type Telnet at the Local prompt followed by either the host s name or its numeric IP address Figure 3 16 Telnet Connection 3 5 Logout To manually log out of the MSS type Logout or Logout Port at the Local prompt or press Ctrl D Figure 3 17 Logging out of t...

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Page 31: ...on with a special note on using the MSS in RS 422 applications on page 4 6 Serial Port Configuration on page 4 9 802 11 Configuration on page 4 16 Formatting an ATA Flash Card on page 4 22 Modem Cards on page 4 22 The full command set is discussed in detail in the MSS Reference Manual 4 1 Rebooting the MSS There are two types of reboots for the MSS A normal reboot simply restarts the MSS A factory...

Page 32: ... IP Configuration For more information on TCP IP protocol configuration refer to the MSS Reference Manual 4 2 1 IP Address You can change the IP address with the Change IPAddress command Figure 4 1 Changing the IP Address 4 2 2 Subnet Mask IP networks can be divided into several smaller networks by subnetting When you request a connection the MSS decides whether the desired TCP IP host is on the l...

Page 33: ... MSS which host is the preferred gateway Figure 4 3 Specifying a Gateway Note A secondary gateway can also be configured in case the primary gateway is unavailable If you do not wish to use a preferred gateway specify 0 0 0 0 as the IP address in the above command See Change Gateway in the MSS Reference Manual for more information 4 2 4 Name Server A TCP IP host generally has an alphanumeric host ...

Page 34: ...ed upon the source IP address for incoming connections or the destination IP address for outgoing connections The IP local host table stores a list of allowed Enabled and denied Disabled IP addresses in either the form of individual addresses e g 192 71 2 88 or wildcards with a 255 in one or more of the trailing segments e g 192 255 255 255 Wildcard addresses match all addresses in that range To a...

Page 35: ...e MSS supports the following MIBs The MSS will respond to queries for unknown MIBs with a not in MIB error to the to the requesting host 4 2 7 1 SNMP Trap Support The MSS will generate limited forms of three of the SNMP traps Traps are sent to a host when certain events occur on the MSS The MSS will generate a Coldstart trap when it first boots and will send a Linkup trap when the startupfile if a...

Page 36: ...d for RS 232 networking they can also be configured for RS 485 networking The RS 485 standard allows a serial connection to be shared like a party line As many as 32 devices can share the multidrop network Typically one device is the master and the other devices are slaves There are a few important things to note about RS 485 networking with the MSS The MSS can be used in either two wire or four w...

Page 37: ...ata and then off for a certain period of time after the data has been sent so that the line is available to receive again At most baud rate settings the timing delay is typically one character length with a maximum of 1 5 character lengths Figure 4 10 Enabling Two Wire RS 485 Mode Note For two wire mode the TXDrive setting must be set to Automatic see TXDrive on page 4 8 If you enable two wire mod...

Page 38: ...he wire that is connected to the transmit terminals on the slave devices In essence the master device will be connected to the slave devices with a swapped cable Figure 4 12 Enabling Four Wire RS 485 Mode 4 3 2 1 TXDrive The MSS can be configured to either always drive the TX transmit signal or to let the attached device control the TX signal tristate when not actively transmitting The Change RS48...

Page 39: ... RS 422 Connection 4 4 Serial Port Configuration The serial ports are set at the factory for 9600 baud 8 data bits one stop bit and no parity Remember that ports should be logged out after configuration so the changes will go into effect On the MSS4 the first serial port is designated as the console port However this is not a dedicated console port and is fully configurable 4 4 1 Access Mode The s...

Page 40: ...ing Autostart A port set for Autostart will never be idle and therefore will not be available for network connections If network connections are desired Autostart should remain disabled the default Autostart can also be triggered by a specific input character As the MSS does not have a default Autostart character you will have to configure one For example when using modem emulation mode you may wa...

Page 41: ...igger can be set by specifying a timeout condition of either the time since the last character was received or the time since the current character burst was started For example to trigger data transmission 150 milliseconds after the current character burst began enter the following command Figure 4 20 Transmitting Serial Data with Trigger Delay The example in Figure 4 20 can be visualized as x x ...

Page 42: ...ch allows a serial port to match its speed to the attached serial device upon connection see Change Autobaud in the MSS Reference Manual for an explanation of the baud rate negotiation process Autobaud is disabled by default but can be enabled with the following command Figure 4 23 Enabling Autobaud 4 4 5 Character Size Parity and Stop Bits The default character size of 8 data bits can be changed ...

Page 43: ...on However passflow is unnecessary in most situations 4 4 7 Modems and Modem Signaling Note These modem related commands can not be used with RS 485 networking The following sections explain some of the MSS options that are typically considered to be modem related They do not apply exclusively to modems but to communications devices in general Most options are mutually exclusive when enabled Note ...

Page 44: ...ions to the enabled serial port Network connections to the serial port will not be permitted unless the DSR signal is asserted To enable DSR signal checking use the Change Signal Check command The following example enables signal checking for the first serial port Figure 4 27 Enabling Signal Checking 4 4 7 3 DSRLogout Note DSRLogout is not available in RS 485 mode When a device connected to the MS...

Page 45: ...de assert DTR when the connection ends 4 4 8 Logouts In addition to DSRLogouts a port can be manually logged out or it can be configured to automatically log out when it has been inactive for a pre determined length of time To manually log out of the MSS type Logout at the Local prompt or press Ctrl D Figure 4 30 Logging out of the MSS To log out a port after a specified period of inactivity use t...

Page 46: ... MSS PC card slot you must reboot the MSS The following parameters should be configured only if you are using the MSS for 802 11 wireless Ethernet networking and plan to use a wireless LAN PC card in one of the MSS PC card slots Users in countries other than the United States must set the Region appropriately before using 802 11 Not all configuration options will be available on all 802 11 cards I...

Page 47: ... WEP is enabled set the AP to Shared Key Authentication For more information about WEP see the definition below BSS Basic Service Set or Cell a group of wireless devices that speak directly with each other A BSS may consist of at most one AP Figure 4 34 Simple Wireless Network BSS ESS Extended Service Set a network consisting of one or more BSSs that share the same ESSID An ESS can contain multipl...

Page 48: ...ng 802 11 networking 4 5 3 802 11 Region When using 802 11 networking you must make sure the MSS is configured for the correct regulatory region Configuring this option incorrectly may cause the MSS to broadcast on frequencies that are illegal in your area The factory default setting is correct for the United States users in other countries should change it to a value appropriate for their area be...

Page 49: ...ress 4 5 5 Extended Service Set ID ESSID Whenever there is more than one ESS in a wireless LAN architecture devices need to be told which ESS they belong to The ESSID ensures that devices communicate with the right AP To tell the MSS which ESS it belongs to enter the Change 80211 ESSID command The exact string you enter will be determined by the settings of the AP with which you want the MSS to co...

Page 50: ...MSS to use the same channel used by the strongest AP with the same ESSID The channel setting relates to the network mode setting For infrastructure network mode you should set the channel to Any so that the MSS can synchronize with an AP For Ad Hoc network mode you should set a specific channel number so that the MSS can start a new IBSS if needed When the channel is set to Any the MSS can only jo...

Page 51: ...bits To enter a WEP key use the Change 80211 WEP Key command Each key is also assigned an index number which is an integer between 1 and 4 To enter the index number use the Change 80211 WEP Index command Figure 4 42 Setting the WEP Key and Index Number 4 5 8 2 Encrypted Traffic Once WEP is enabled the MSS will allow reception of both encrypted and unencrypted traffic You can disable the reception ...

Page 52: ...as a laptop you will need to reformat it before using it again with the MSS 4 7 Modem Cards Certain kinds of modem PC cards can be used with the MSS Check the Lantronix web site for a list of currently supported cards Note The MSS does not support PC card hot swapping Any time you insert a PC card into an MSS PC card slot you must reboot the MSS A properly installed modem card will be treated like...

Page 53: ...m the MSS modem port you must connect to the modem card via Telnet or a local serial port You can then issue AT commands to the modem to dial out To connect to the modem from a local serial port use the Connect Local command Figure 4 45 Connecting to the Modem To connect to the modem from the network Telnet to the modem port port 2005 Figure 4 46 Connecting to the Modem Local CONNECT LOCAL PORT_5 ...

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Page 55: ...vice and multiple hosts on the network see Multihost Mode on page 5 11 Making the MSS look like a modem so that it can be used with existing communications software see Modem Emulation Mode on page 5 13 Using the Lantronix COM Port Redirector software to redirect PC COM ports see COM Port Redirector on page 5 15 5 1 Incoming Connections 5 1 1 Socket Connections Each node on a network has a node ad...

Page 56: ...ignals is not transmitted when using socket connections 5 1 1 1 TCP IP Socket Connections The MSS supports TCP IP socket connections to ports 2001 2006 and 3001 3006 Ports 2001 2004 and 3001 3004 are physical MSS serial ports and ports 2005 2006 and 3005 3006 are installed modem cards To specify a connection to a socket use the Telnet command followed by the MSS IP address or resolvable name and t...

Page 57: ...host s name or its numeric IP address Figure 5 1 Opening a Telnet Connection Note If you have configured a preferred host no host name is required The Telnet command can be followed by one or more environment strings This table shows the most commonly used strings see the MSS Reference Manual for the complete list These environment strings can be used to make a Telnet connection to a specific port...

Page 58: ...ne is displayed on the screen at a time Each separate connection is a session The following section explains commands used to manipulate sessions 5 2 2 1 Break Key and Local Switch The Break key allows users to leave an active session and return to the MSS Local prompt without disconnecting sessions By default the MSS handles the Break key locally Users can change whether the Break key is processe...

Page 59: ...orking in Conan he would resume his session on Duff If he pressed the forward key while working in Conan he would move to his session on Thor The Change Backward Switch and Change Forward Switch commands define keys used to switch sessions without returning to local mode Backward and forward switch keys must be explicitly defined To specify a control character use escaped hex xx The example below ...

Page 60: ...ard in one of the MSS PC card slots You can also enter Show 80211 Antenna to display the card s current antenna settings and Show 80211 Power to display the current power settings 5 2 3 2 Show Hostlist Show Hostlist displays the current contents of the host table used for multihost mode connections Host entries are numbered from 1 to 12 5 2 3 3 Show IPsecurity Show IPsecurity displays the current ...

Page 61: ...rotocols that can be used to diagnose network transmission problems 5 2 3 9 Show Session Show Session displays information about current sessions including each active port user and type of session 5 2 3 10 Show Users Show Users displays the name port number and connection status of all current users or a specified user 5 3 Disk Management The MSS contains three filesystems flash Flash is re write...

Page 62: ...on the card can be referenced as pccard1 directory filename for cards installed in the top slot or pccard2 directory filename for cards installed in the bottom slot The Disk commands described above and in the MSS Reference Manual can also be used with an ATA Flash card For example to back up a Flash disk file data txt onto an ATA card in the top slot use the following commands to create a backups...

Page 63: ...re an MSS to MSS encrypted session set the same encryption password on both units The password can be up to 7 alphanumeric or escaped hex xx characters and is case sensitive Figure 5 10 Setting the Encryption Password After the encryption password has been configured reboot both units Establish an encrypted session to either one of the unit s local prompts or to a serial port using the following c...

Page 64: ...twork and serial port parameters have been configured properly and n represents the port number of the attached device for that MSS the two Servers would be configured as follows MSS_A Local CHANGE PORT n DEDICATED TCP 192 168 5 10 3001T Local CHANGE PORT n AUTOSTART ENABLED MSS_B Local CHANGE PORT n ACCESS REMOTE Local CHANGE PORT n DEDICATED NONE Local CHANGE PORT n AUTOSTART DISABLED Note If th...

Page 65: ...ost mode sets up a data pipe between one of the serial devices attached to the MSS and multiple hosts on the network Data from a network host goes out of the specified MSS serial port and data from the serial port is sent to all connected network hosts The MSS does not alter the data in any way it merely forwards the data from one point to another There are a few important things to note about mul...

Page 66: ...dresses Figure 5 14 Adding Entries to the Host Table In the example the UDP host entry is actually a broadcast IP address Data is sent to all hosts on that particular subnet 5 6 3 Removing Hosts To remove an entry from the host table use the Show Hostlist command to find out its entry number then use the Hostlist Delete command to delete it Figure 5 15 Removing Entries from the Host Table Local CH...

Page 67: ...an still accept network TCP connections to the serial port To use modem mode enable modem emulation and set your MSS for Autostart using A as the autostart character This triggers the MSS to enter modem mode whenever it sees a modem style AT command Figure 5 16 Enabling Modem Emulation Mode As soon as someone types an AT command the MSS will enter modem mode and begin processing the AT commands Wh...

Page 68: ...on ATE1 the default ATH Disconnects the network session ATI Displays modem version information ATQ Result codes on ATQ0 the default or off ATQ1 ATS Allows serially attached devices to control how the MSS accepts a network call ATS0 0 will cause the MSS to send the RING string to the serial device when it receives a network connection request The serial device must reply with the ATA string ATS0 1 ...

Page 69: ...n signal the serial device that there is a valid connection and the serial device will know it can send data to the remote device 5 8 COM Port Redirector The Lantronix Com Port Redirector application allows PCs to share modems and other serial devices connected to an MSS using Microsoft Windows applications The Redirector intercepts communications to specified PC COM ports and sends them over a ne...

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Page 71: ...uration including the information from a Netstat command Description of the problem Debug report stack dump if applicable Status of the unit when the problem occurred please try to include information on user and network activity at the time of the problem A 2 Full Contact Information Address 15353 Barranca Parkway Irvine CA 92618 USA Phone 949 453 3990 Fax 949 453 3995 World Wide Web http www lan...

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Page 73: ...ror Messages Problem Message Error Remedy The MSS is connected to a power source but there is no LED activity The unit or its power supply is damaged Contact your dealer or Lantronix Technical Support for a replacement The MSS is unable to complete power up diagnostics This generally indicates a hardware fault One of the LEDs will be solid red for three seconds followed by one second of another co...

Page 74: ...e from a network host If the OK LED blinks rapidly the Flash ROM code may be corrupt Reboot the unit If you get the same message you will need to reload Flash ROM See Reloading Software on page D 2 If you did not request a TFTP boot the flash ROM code is corrupt The unit will remain in boot mode Table B 2 DHCP Troubleshooting Area to Check Explanation DHCP is enabled on the MSS Use the Change Serv...

Page 75: ...y the complete pathname for the download file in the BOOTP configuration file or add a default pathname to the download filename The MSS and host are in the same IP network Some hosts will not allow BOOTP replies across routed IP networks Either use a host running a different operating system or put the MSS in the same IP network as the host Table B 4 RARP Troubleshooting Area to Check Explanation...

Page 76: ...with the ats0 1 command The modem should not be configured to answer the phone unless the MSS asserts DTR Modem control must be enabled on the MSS Using modems on ports without modem control enabled will lead to security problems The MSS Autobaud feature should be enabled only when required B 6 Entering Commands at the Boot Prompt If the Boot prompt appears on the serial console instead of the Loc...

Page 77: ...ecessary when a new version of software is released and you wish to upgrade your unit If the server cannot download the file the code in Flash ROM will still be usable Help Displays a one page summary of available commands and what they do Change Bootgateway Specifies a server to send packets to when downloading code The packets will be addressed to the loadhost but will be physically set to the b...

Page 78: ...ding of RARP queries during the boot sequence It is enabled by default Change Secondary ip_address Specifies a backup loadhost The IP address should be in standard numeric format no text names are allowed The backup loadhost will be queried if the primary host cannot load the server Change Software filename Specifies the name of the file to load The MSS will automatically add SYS to the filename y...

Page 79: ... connector pin connections Figure C 1 RJ45 Ethernet Connector C 1 1 Fiber Link Ethernet The MSS4 SFP and MSS4 DFP also include a 100BASE FX fiber optic Ethernet connector The figure below shows the fiber link connector pin connections which use the duplex ST connector interface one transmitter one receiver Figure C 2 Fiber Optic Connectors 1 2 3 4 5 6 7 8 1 RX 2 RX 3 TX 6 TX TX RX ...

Page 80: ...e dual RS 232 RS 485 serial ports The default serial port settings are 9600 baud 8 bits no parity and 1 stop bit C 2 1 1 RS 485 Screw Terminal The following shows the pin connections of the MSS4 RS 485 screw terminal block Figure C 3 RS 485 Screw Terminal Block C 2 1 2 RS 232 Screw Terminal The following figure shows the pin connections of the MSS4 RS 232 screw terminal block Figure C 4 RS 232 Scr...

Page 81: ...re C 6 DB9 RS 232 Serial Connector C 3 MSS4 PC Card Slots The MSS4 PC card slots available on the DFP and SFP models accept Type I II PC cards The bottom slot also accepts Type III cards The MSS4 software supports IEEE 802 11 wireless networking PC cards modem cards and a selection of ATA storage cards For the most current information on which PC card technologies are supported and which cards are...

Page 82: ... connectors mentioned in this section C 4 1 Power Jack The MSS4 ships with a standard barrel power jack whose inner conductor is positive Figure C 7 Power Jack Connector C 4 2 Screw Block Power The MSS4 also has a 9 30V DC screw block power jack Figure C 8 Screw Block Power 2 1 mm 5 5 mm V V Shield ground ...

Page 83: ... the Lantronix FTP server ftp lantronix com Most of these files are binary data so the binary option must be used to transfer the files All released files are in the pub directory Always download the README file in the pub directory before downloading anything else it contains a list of available software files To log into the FTP server enter a username of anonymous and enter your full email addr...

Page 84: ...ing the download attempts The MSS will then try TFTP NetWare and MOP booting in that order provided that it has enough information to try each download method Downloading and rewriting the Flash ROM will take approximately two minutes from the time the Initialize command is issued If the download file cannot be found or accessed the MSS can be rebooted with the code still in Flash ROM The OK ACT L...

Page 85: ...tic is enabled on the host s Ethernet circuit copy the MSS4 SYS file to the MOM LOAD directory and reload the MSS using the Initialize Reload command Be sure to use binary mode for any file transfers D 3 Troubleshooting Flash ROM Updates Many of the problems that occur when updating the Flash ROM can be solved by completing the following steps Local SET PRIVILEGED Password SYSTEM not echoed Local ...

Page 86: ...g Software D 4 MOP Ensure that the Ethernet circuit must has the service characteristic enabled Ensure that the MOM LOAD search path includes the directory containing the MSS4 SYS file Table D 1 Flash ROM Troubleshooting Protocol Area to Check ...

Page 87: ...tor The MSS4 D and MSS4 S power cube adaptor has the following specifications Adapter input voltage 110 V AC US 220 V AC International Adapter output voltage 12 V DC Operating current 0 8A 12 V Power consumption 10 Watts maximum E 1 3 MSS4 DFP SFP Adaptor The MSS4 DFP and MSS4 SFP power cube adaptor has the following specifications Adapter input voltage 110 V AC US 220 V AC International Adapter o...

Page 88: ...ration Do not operate the MSS near heating or cooling devices large windows or doors that open to the outdoors E 2 2 Relative Humidity Limitations Operating range 10 to 90 noncondensing 40 to 60 recommended Storage range 10 to 90 noncondensing E 2 3 Altitude Limitations Operating 2 4 km 8 000 ft Storage 9 1 km 30 000 ft When operating the MSS above 2 4 km 8 000 ft decrease the operating temperatur...

Page 89: ...ing contract between the parties Any such contract states the entire obligation of Lantronix The contents of this document shall not become part of or modify any prior or existing agreement commitment or relationship The information recommendation description and safety notations in this or other documents supplied by Lantronix are based on general industry experience and judgment with respect to ...

Page 90: ...s Safety EN60950 1988 A1 A2 EMC EN55022 1998 class A EN50082 1 1992 IEC 801 2 1991 prEN55024 2 1992 4KV CD 8KV AD IEC 801 3 1992 prEN55024 3 1991 3V M IEC 801 4 1998 prEN55024 4 1992 0 5kV Signal Lines 1kV Power Lines Supplementary Information The product complies with the requirements of the Low Voltage Directive 72 23 EEC and the EMC Directive 89 336 EEC Manufacturer s Contact Director of Qualit...

Page 91: ...etect B 4 Channel wireless 4 20 Character size 4 12 COM Port Redirector 5 15 Community name SNMP 1 3 Components 2 1 2 2 Contact information A 1 D Datasend 4 11 DB9 2 1 2 2 C 3 Dedicated port service 4 16 Defaults restoring 4 1 B 5 DHCP 1 2 2 7 3 5 B 2 B 6 D 2 Troubleshooting B 2 Displaying current settings B 6 Domain name 1 2 Domain name server DNS 1 3 4 3 Download file B 3 DSR Data Signal Ready 4...

Page 92: ...uction 1 1 IP Gateway 4 3 Logins 3 6 Nameserver 4 3 Security 1 3 4 4 SNMP 4 5 Subnet mask 4 2 UDP 5 11 IP address 3 3 3 4 3 5 B 1 B 3 Changing 4 2 Configuring 3 3 4 2 B 6 L Lantronix Contact information A 1 Technical support A 1 LEDs 1 1 2 1 2 2 2 3 2 6 B 1 Link LED 2 3 2 6 Loadfile B 6 Loadhost B 6 Local host table 4 4 Local mode 1 4 Local prompt 1 4 3 5 3 9 4 15 B 2 Login 3 6 EZWebCon 3 7 Passwo...

Page 93: ...nals 4 13 Parity 4 12 Preferred service 4 16 Serial 2 5 4 9 Serial console 3 5 3 8 Socket connections 3 1 Stop bits 4 12 Power Connectors 2 3 2 6 LED 2 6 Specifications E 1 Supplying 2 6 Troubleshooting B 1 Power connector 2 1 2 2 Power LED 2 3 Power up troubleshooting B 1 Preferred port service 4 16 Privileged user 3 2 Problem report procedure A 1 Prompts Boot 3 8 B 2 B 4 Local 3 5 B 2 R RARP 1 2...

Page 94: ...MP 4 5 Community name 1 3 Traps 4 5 Sockets 3 1 5 1 TCP IP 5 2 Software Developer Kit SDK 1 3 Software file B 3 D 2 Software updates D 1 FTP D 1 Web D 1 Stop bits 4 12 Subnet mask 4 2 Superuser privileges 3 4 T TCP IP 3 6 B 1 Configuration 4 2 Reloading software D 2 Socket connections 5 2 Support information 1 2 Telnet 1 2 3 1 Environment strings 5 3 Incoming connections 3 7 Outbound connections 3...

Page 95: ...v WEP 4 17 4 21 Index Number 4 21 Key 4 21 WINS 4 5 Wireless See 802 11 ...

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