Configuration and Setup

MicroTelnet uses Link Local and multicast DNS (also known as Bonjour) to advertise its presence on the network. You can use a Bonjour browser to locate MicroTelnet and then use a standard web browser to configure MicroTelnet. Some web browsers, such as Apple’s Safari, have a built in Bonjour browser. Other web browsers, such as Internet Explorer, can have a Bonjour plug-in installed for them.

Once you run Bonjour Browser you will see a window similar to the following

Each MicroTelnet has a unique name associated with it which you can change later on. The factory default name is in the form MicroTelnet (XXXXXX), where XXXXXX are the last 3 digits of the MicroTelnet’s
MAC address in hex. Double clicking on the Name will run your web browser and attempt to connect to the MicroTelnet Setup web page.
When your browser connects to MicroTelnet, you will be greeted with an authentication window requesting your username and password.

The factory default username is user and the factory default password is password. Usernames and passwords are case sensitive. You will have an opportunity later on to change these if you wish.

Once you type the username and password you will see the main MicroTelnet Setup page.
The following sections describe the main MicroTelnet Setup page and the other web pages which are used to configure

MicroTelnet Setup Web Page

The navigation bar at the top of the web page allows you to change various MicroTelnet settings:. You will find this navigation bar on all the MicroTelnet pages. The various pages available are:
Home - returns you to the MicroTelnet Setup page.
Services - allows you to change the MicroTelnet device name and the TCP or UDP ports that various MicroTelnet services use.
Serial - allows you to change serial port parameters such as baud rate and stop bits.
Telnet - allows you to view the current Telnet status and configure MicroTelnet as a Telnet client or server and how it will connect and disconnect to remote Telnet servers.
IP - allows you to enable / disable DHCP and specify additional static IP addresses.
Security - allows you to change the web page username and password and limit access to MicroTelnets TCP or UDP ports to certain IP addresses.
Admin - allows you to perform administration functions on MicroTelnet such as Link LED control, restarting (rebooting) MicroTelnet or setting it back to factory defaults.
Update - allows you to load new Firmware or Web pages into MicroTelnet.

Telnet Setup page gives you a quick overview of some of MicroTelnet’s settings:

Website Version - shows the current Website version number. You can load new Website software
Firmware version - shows the current Firmware version number. You can load new Firmware
Hardware Version - shows the hardware version that MicroTelnet is running on.
Ethernet MAC Address - shows MicroTelnet’s Ethernet MAC address. Each MicroTelnet has a unique MAC Address.
Free Space Remaining - shows how much free space is remaining in MicroTelnets persistent (flash) storage. MicroTelnet stores configuration parameters in persistent storage. If persistent storage space is exhausted, you will need to reset MicroTelnet back to factory defaults to reclaim the space.
DHCP Address - shows your current DHCP address. A value of 0.0.0.0 means that a DHCP address has not been obtained either due to the DHCP server not having allocated one or DHCP being disabled.
Link Local IP Address - shows your current link local (LL) address. Each MicroTelnet automatically generates it’s own LL address which is unique on the local network. LL addresses are not routable and thus cannot be accessed outside of the local network. If you need a routable address, you should use a DHCP or Static IP address.
Static IP 1 & 2 - shows each static IP address that MicroTelnet will respond to. A value of 0.0.0.0 means that no Static IP address has been configured.
Any changes that are made to MicroTelnet parameters are saved in persistent storage. Most changes to MicroTelnet parameters force MicroTelnet to restart, so you should be careful not to change these parameters while there are other network connection to MicroTelnet or else these connections will be lost.

Services Web Page

The Services web page allows you to change the MicroTelnet device name, the TCP or UDP ports that various
MicroTelnet services use, various TCP keep-alive parameters and an extra port ofset.

Change Device Name
The device name is the name that MicroTelnet uses to advertise its services and is seen by the Bonjour browser.
The factory default name is in the form MicroTelnet (XXXXXX), where XXXXXX is the last 3 digits of the MicroTelnet’s MAC address in hex. You can change the name to anything up to 32 characters. You should
try to keep names unique on your network if you are using multiple MicroTelnets to more easily distinguish among them.

This web page also displays the Link Local name. The link local name is a DNS safe name that is derived from the device name. Operating system which support the mDNS protocol allow you to address MicroTelnet using
the Link Local name.

Change Port Values
You can also change the various port numbers for the protocols that MicroTelnet supports. Normally you will leave these port numbers at their default values. The protocols whose port numbers you can change are:

HTTP - This is the http protocol which is used to communicate with MicroTelnets web server.
Telnet - This service is used to pass data between a network connection and the serial port.
Daytime - This service is used to get the amount of elapsed time that MicroTelnet has been running.
Discard - This service throws away any data that is sent to it. Used mostly for speed testing.
UDP Serial - This is a MicroTelnet specific protocol which uses UDP to send and receive serial data.

The port values for Telnet and UDP Serial protocols will be used as source port values when MicroTelnet is in Client mode.

See MicroTelnet Services and Protocols section for more details about the protocols and how to use them.

Change TCP Keep-Alive
You can enable and change various parameters which control MicroTelnet’s keep-alive mechanism. The keepalive mechanism will terminate network connections if a computer is not reachable for a period of time. The parameters which can be changed here are global and effect all MicroTelnet TCP/IP protocols/services (i.e. HTTP, Telnet, Daytime and Discard).

Normally TCP/IP connections are maintained indefinitely. This means that intermediate computers and routers can go down and come back up and TCP/IP will not care. This can cause problems in certain cases when a computer connected to MicroTelnet goes down. MicroTelnet will maintain the connection to its service for the computer because it has no way of knowing the computer has been shut down. Because a connection is still maintained for a particular service, MicroTelnet will not allow other computers to connect to that service.

To remedy this problem you can enable TCP Keep-Alive. You can fine tune the keep-alive mechanism by altering various parameters

Idle Time - specifies the amount of time in seconds to wait before sending a probe packet to determine if the other end is still active. The default value of 7200 is 2 hours.
Retry Interval - specifies the amount of time in seconds between successive probe packets. The default is 75 seconds.
Retry Count - specifies the number of times probe packets will be retried before the connection is terminated. The default value is 9 times.

Set Extra Port
All MicroTelnet services can be accessed at their default port numbers. The extra port value is a number which is added to the default port number which allows MicroTelnet to also be accessed at diferent port number.
For example, by default MicroTelnet’s web pages can be accessed at port 80. The default extra port value of 47000 allows MicroTelnet to also be accessed at port 47080. If you need to disable this feature, just set the extra port value to 0.

The extra port value can be used, for example, in a NAT router to forward TCP/IP data in a certain port range to a MicroTelnet. You could set port 47080 to be forwarded to a MicroTelnet on the local network while the NAT router’s web page was externally accessible as port 80.

Serial Web Page

The Serial web page allows you to change various parameters that deal with the serial port hardware. You
can also change some parameters which deal with the UDP serial protocol here.

Serial Port Parameters
You can change several serial port parameters. These parameters control the serial port hardware.

Baud Rate
You can select from one of the following baud rates: 110, 134.5, 150, 300, 600, 1200, 2400, 4800, 9600, 19200, 31250, 38400, 57600, 115200

The default baud rate is 115200.

MicroTelnet will bufer data, but high data rates will cause buffer overflows. Several variables including network
latency makes determining the optimal baud rate dificult. It is best to enable some kind of flow control
(i.e. XON/XOFF or RTS/CTS) to ensure that the serial port buffers are not overrun.

Data Bits and Parity
You can set one of the following data Bits and parity combinations

The default baud rate is 115200.

MicroTelnet will bufer data, but high data rates will cause buffer overflows. Several variables including network
latency makes determining the optimal baud rate dificult. It is best to enable some kind of flow control
(i.e. XON/XOFF or RTS/CTS) to ensure that the serial port bufers are not overrun.
Data Bits and Parity

You can set one of the following data Bits and parity combinations

7 Bits Even Parity
7 Bits Odd Parity
7 Bits Mark Parity
7 Bits Space Parity
8 Bits No Parity
8 Bits Even Parity
8 Bits Odd Parity
8 Bits Mark Parity
8 Bits Space Parity

The default is 8 Bits No Parity.

Flow Control
Flow control may be set to one of the following
None - No flow control is performed. Data may be lost at high baud rates.
XON/XOFF - XOFF (^S) is sent to stop data flow; XON (^Q) is sent to resume data flow
RTS/CTS - the RTS and CTS hardware lines are used to control data flow.

In order for flow control to work properly, you must also set the device that you are connecting to MicroTelnet to the same flow control settings.
Press the “Set Parameters” button to have the changes take effect immediately. MicroTelnet is not restarted when you change serial port parameters.

UDP Remote IP
Specifies the remote IP address that MicroTelnet will use to send data. If UDP Remote IP is set to 0.0.0.0 then this means that MicroTelnet will not send UDP data until it has received UDP data and can determine the IP address to send to. Once MicroTelnet has determined the remote IP address it will send any data to that address.

You can specify both unicast and broadcast/multicast IP addresses in this field.

Remote IP is
This allows you to specify how the Remote IP address will be treated.

Fixed - The remote IP address will not change when a UDP packet is received. If the UDP Remote
IP address is 0.0.0.0, then it will change once to reflect the UDP IP address of the first UDP packet received.
Changeable - The remote IP address will change to reflect the IP address of the recently received
packet. All future packets will be sent to this new address.

UDP Timeout
UDP Timeout is the period measured in ticks (1 tick is 10ms). This is the time, after the last character is received, that MicroTelnet waits before sending any data it has in its bufer to the remote node via UDP. The internal buffer can store about 250 bytes, so UDP transmissions from MicroTelnet should be kept smaller than UDP Timeout that (unless your device supports flow control.)

Press the “Set UDP Configuration” button to have the changes take effect and restart MicroTelnet.

Bufer Management
Bufer Management, which operates in both in UDP and TCP/IP modes, allows you to select how MicroTelnet’s serial receive buffer is managed. You can specify at which point data in the serial buffer will be sent to the remote end. The buffer management conditions are used to help MicroTelnet determine when the end of a serial reception has been reached. They are not buffer formatting or packetizing parameters. MicroTelnet takes a best effort approach in sending data when any of the below buffer management conditions are satisfied.

For example, at baud rates greater than about 2400 baud and in UDP mode, some extra characters may be sent after an End of Bufer Byte or any other buffer management condition (in TCP/IP mode, the remote end only gets the characters that it requested so no “extra” bytes are sent.)

A benefit of the buffer management parameters, especially the Bit Stall Delay, it that character latency is very low. For example, in TCP/IP mode, placing a loopback serial connector on MicroTelnet and sending a single byte from a remote host will yield responses in the order of 8ms.

Bufer Threshold
When the number of bytes in the serial receive buffer reaches this value, MicroTelnet sends the bytes in the buffer to the remote IP Address. The default value of 125 is one-half the buffer size. The buffer threshold is active when no flow control is selected.

End of Bufer Byte is
This allows you to enable or disable MicroTelnet’s checking for an end of buffer byte. The default is that end of buffer byte checking is disabled.

Enabled - Enables detection of the end of buffer byte.
Disabled - Disables detection of the end of buffer byte (default).

End of Bufer Byte
This specifies the byte value (in decimal) which will be used as a trigger to indicate to MicroTelnet that the buffer should be sent. The default value of 10 is the Line-Feed character which is useful in sending data that is line oriented.

Bit Stall Delay is
This allows you to enable or disable MicroTelnet’s checking for a stall in character reception. A stall is a discontinuity in reception due to the sender stopping its transmission for a period of time. MicroTelnet measures the stall time in number of bits of the current baud rate. This allows MicroTelnet to quickly determine when a serial reception has terminated which in turn will cause the data to be immediately sent to the remote end.

Enabled - Enables bit stall delay checking (default).
Disabled - Disables bit stall delay checking.


Bit Stall Delay
The amount of bit stall delay measured in bits of the current baud rate. The default value of 15 corresponds to about 1.5 character times since most characters take 10 bits. The bit delay value should be chosen such that it is no larger than about 1/50th of a second since that is the largest value that MicroTelnet can use for a stall delay amount. Larger bit stall delays may be helpful in preventing MicroTelnet from sending its receive bufer prematurely when the sender is slow in sending successive characters.

Press the “Set Bufer Management” button to have the changes take effect and restart MicroTelnet.

Telnet Web page

The Telnet Web page allows you to view the current Telnet connection status and also control whether MicroTelnet acts as a Telnet server or client. As a server, MicroTelnet waits for connections to its port (default 23).
As a client MicroTelnet will initiate connections to other Telnet servers or TCP/IP programs. There are several parameters which allow you to specify how MicroTelnet initiates connections to other Telnet servers or programs.

The current Telnet Connection Status includes

Current Connection State
The state that the Telnet session is currently in. See Appendix A for a list of states and their explanation . You can use this field to determine if anyone is currently connected to MicroTelnet’s Telnet port.

Current Remote IP
The remote IP address that MicroTelnet Telnet is currently connected to. An address of 0.0.0.0 means that MicroTelnet is currently not connected to anyone.

Current Remote Port
The remote TCP/IP port that MicroTelnet is connected to. A port of 0 means MicroTelnet is not connected to a
remote computer.

Parameters you can select are

Mode
This option controls which mode MicroTelnet will operate in.

Client - MicroTelnet acts as a client initiating connections based on parameters listed below. If any
of the parameters below are not selected and MicroTelnet is in Client mode, then it will unconditionally
initiate a connection. This means that once one of the parameters below are selected,
then MicroTelnet will connect only on those parameters (and not unconditionally.)
Server - MicroTelnet acts as a server passively listening for a connection to its port (default 23). You
can change the default port in the Services Web page.
AT-Command - MicroTelnet responds to AT-Modem type commands received from its serial port.
See Appendix A - AT Command Set for a description of the various AT Commands MicroTelnet understands.
In AT-Command mode MicroTelnet is neither a Server nor Client until set by an appropriate AT command.

Server Connects or Client Connects/Disconnects on
This option controls whether MicroTelnet can connect or disconnect on various serial port line states. In client mode, MicroTelnet will connect when any of the selected lines are high. It will disconnect when all the
selected lines are low. In Server mode, a low line will cause a disconnect. You need to be aware that in Server mode whatever control line(s) you select, at least one needs to be high before a connection is established.
If they are all low, then the connection will be terminated right after it is made. The signal levels (High/Low)
described here are RS232 levels. If you are using just a MicroTelnet Module, the logic levels will be inverted.

DSR - Connect on high DSR line ; disconnect on low DSR line.
DCD - Connect on high DCD line; disconnect on low DSD line.
RI - Connect on high RI line; disconnect on low RI line.

Clear Bufer on
This option controls when and if MicroTelnet should clear its serial port buffers. This affects both client and
server modes.

Connect - clears serial port receive and transmit buffers before a connection is established.
Disconnect - clears serial port receive and transmit buffers after a connection is terminated.

Client Connects on
This option controls whether a client will connect when a character is received. This does not preclude the
client connecting for other conditions.

Any Character - Client connects when any character is received on the serial port.
Other - Client will not connect on a character reception, but may connect on other conditions.

Data Transfer Mode
This option controls how data will be interpreted and transferred across the network connection.

Binary - Data will flow with no interpretation. All 8 bits of each character will be transferred unchanged.
NVT - TCP/IP data received will be interpreted as Telnet Network Virtual Terminal commands. In general, all data received will be transferred unchanged unless it is proceeded by a 255 (FF hex) character. Serial data received by MicroTelnet will be sent unchanged to the remote TCP/IP connection,unless it’s the 255 character, in which case two 255 characters will be automatically sent. See Appendix A - Telnet Network Virtual Terminal (NVT) for more details.

Remote IP
The Remote IP specifies the remote IP address that a Telnet client connects to. The remote address may be a connection to a Telnet server or any other TCP/IP connection including another MicroTelnet running in Server mode.

Remote Port
The Remote Port specifies the remote port number that a Telnet client connects to. The remote port may be to a Telnet server or any other TCP/IP connection including another MicroTelnet running in Server mode.

Retry Period
The Retry Period specifies the amount of time that a Telnet client waits after a TCP disconnect or failed connection
before attempting to connect again. A value of 0 causes MicroTelnet to retry immediately.

Idle Disconnect Timeout
The Idle disconnect Timeout specifies the amount of time in seconds to wait after no characters are received
or sent before the TCP/IP connection is terminated. The idle disconnect timeout may be used in both Client
and Server modes. An Idle Disconnect Timeout of 0 disables the feature.

DTR Output State
DTR Output State specifies what state the DTR line output will be in and how Telnet will control it. This can be useful when you have a microprocessor or other device which needs to know if a connection has been established. The DTR line may briefly fluctuate when MicroTelnet is first started or after a reset. Your attached device will need to wait a few seconds after power is applied or after MicroTelnet is reset before reading the DTR line. The signal (High/Low) described here are RS232 levels. If you are using just a MicroTelnet Module,the logic levels will be inverted.

Always High - DTR line will always be high (default).
Always Low - DTR line will always be low.
Connect High - DTR line will be high when MicroTelnet has an established connection on its Telnet port. This applies to both client and server modes. The DTR line will be low when the connection is terminated.
Connect Low - DTR line will be low when MicroTelnet has an established connection on its Telnet port. This applies to both client and server modes. The DTR line will be high when the connection is terminated.

MicroTelnet polls every second for various conditions to change. The above input parameters may take up to one second before they are noticed. This means, for example, the changes in the serial port line states may take up to a second before they are detected. The serial hardware lines should, therefore, be kept constant for at least one second.

Force AT Mode on
AT command mode may be forced to be enabled when a RS232 hardware control line is brought high. The
signal levels (High/Low) described here are RS232 levels. If you are using just a MicroTelnet Module, the logic levels will be inverted. When the line is brought low, AT mode is exited and MicroTelnet resumes operating in its previous mode.

None - AT mode forcing is disabled (default).
DSR - AT mode is forced when DSR is high.
DCD - AT mode is forced when DCD is high.
RI - AT mode is forced when RI is high.

When AT command mode is forced, MicroTelnet will act as if it is in AT mode and start accepting AT commands.
If MicroTelnet has Server mode enabled, it will continue listening for connections and thus you may get a CONNECT or NO CARRIER message. If MicroTelnet has Client mode enabled, it will continue to attempt to connect to the remote end and you may also get a CONNECT or NO CARRIER message.

MicroTelnet polls every tenth of second (1/10s) for force-AT-mode control lines to change. The above input
parameters may take up to one tenth of a second before they are noticed. This means, for example, the changes in the serial port line states may take up to a tenth of a second before they are detected. The serial hardware lines should, therefore, be kept constant for at least a tenth of a second.

You should make sure that these control lines do not interfere with the Server Connects or Client Connects/
Disconnects control lines. You should choose different lines for both these functions.
 

IP Web Page

The IP Web page allows you to specify how MicroTelnet acquires an IP address. You can enable or disable
DHCP address acquisition or you can assign fixed IP addresses to MicroTelnet.

DHCP Configuration
The current DHCP status is displayed along with the DHCP address, gateway, mask and DNS server that has
been acquired. The only option you have is to enable or disable DHCP address acquisition.


Fixed IP Addresses

You can specify up to 2 static IP addresses. Static IP addresses can be used to give MicroTelnet a known unchanging IP address. You will need to specify the IP address, gateway, and mask to properly set the static IP address.The gateway and mask values are used to initiate communications from MicroTelnet to other computers.Some example values are

If you disable DHCP address acquisition and you don’t specify any static IP addresses, the only IP address that MicroTelnet will have is the automatically generated Link Local address. This may make MicroTelnet more difficult to locate on a network if your computer does not support link local addressing. See Appendix B
- Adding Route to Windows so Link Local Devices Can be Accessed if you have Windows and need to only use a link local address.

In order to have changes to the DHCP configuration or static IP addresses made, MicroTelnet will automatically restart.

Security Web Page

The Security Web page allows you to specify the level of protection you need

Change Username and Password
You can enable or disable username and password protection for MicroTelnet’s web pages. If you disable username/password security anyone can access MicroTelnet’s web setup pages. With security enabled all of MicroTelnet’s web setup pages will be protected with a username and password, although you will only need to enter this information once when you access the web page.

You can change the username and password for web access. Both the username and password are case sensitive.
Only the username is displayed. The default username and password are

Default username user
Default password password

If you forget the username/password you will need to perform a hardware reset to set MicroTelnet to its default username and password.

Authorized Port, IP address and Mask
You can specify up to 4 TCP ports that need protection. Ports may be protected so that only computers with certain IP addresses can have access to MicroTelnet. For each protected port you can set three parameters:

Port Number - the number of the port you wish to have protected. These port numbers should correspond to the port numbers in the Services web page. For example, the factory default port of 80 is used for HTTP. Access is only restricted for port numbers which are listed here. If a port number is not listed then it has no access restriction.
IP Address - the complete or partial IP address that will have access to the port.
IP Mask - a mask value which allows you to specify a range of IP addresses. The mask is ANDed with the IP address which is accessing MicroTelnet and compared to the IP Address above.


Here are some examples,
Port Number 80
IP Address 192.168.2.0
IP Mask 255.255.255.0

This will grant access to port 80 (the HTTP port) for anyone from the 192.168.2.0 subnet. That is IP addresses
192.168.2.0 to 192.168.2.255.

Port Number 23
IP Address 192.168.2.153
IP Mask 255.255.255.255

This will grant access to port 23 (the Telnet port) for anyone from IP address 192.168.2.153. Notice by
setting the mask to 255.255.255.255 and specifying a full IP address, you can restrict access to just a
single IP address.


Admin Web Page

The Admin Web page provides several options which help you manage MicroTelnet. You can control the Link LED and force MicroTelnet to restart (reboot) or to have MicroTelnet set itself into a factory default configuration.

Set LED Brightness
You can control the brightness level of the Link LED.


LED Brightness - - specifies the LED brightness level. You can set a level from 0 to 255. A level of 0 turns off the LED and a level of 255 sets the LED brightness to its maximum. The default value of 40 sets the LED brightness to a medium-low level.


Press “Set LED Brightness” to change the brightness level. The brightness level will change immediately without restarting.


Blink LED
You can force the Link LED to blink for a period of time and at a certain rate. This is useful if you have several MicroTelnets and you wish to know which MicroTelnet you are controlling via the web interface. Once the LED finishes blinking it will revert to its original functionality.

Blink time - specifies the amount of time the LED will blink in seconds. You can specify a value of 0 a 255
Blink rate - specifies how fast the LED will blink. You can enter a value of 0 to 7. 0 is the slowest blink rate and 7 is the fastest.

Press “Blink LED” to start the LED blinking immediately without MicroTelnet restarting.

Telnet Test Mode
Telnet Test Mode is used to test MicroTelnet’s Serial and Network connection. It is primarily there for tests performed at the factory.

Active - Test mode is activate (enabled)
Inactive - Test mode is not active (not enabled)

Select which mode you want MicroTelnet to be in and then press “Set Serial Test Mode.” The Test Mode setting is not saved when you reflash MicroTelnet.
To properly test MicroTelnet using this mode, two MicroTelnets are used. Their serial ports are connected together via a Null modem cable. Their Ethernet ports are either connected together via an Ethernet crossover cable or through a hub. One MicroTelnet is set as server and the other MicroTelnet is set as client. At least one MicroTelnet needs to be set to Active mode. The baud rates need to be the same on both MicroTelnets and they must have some kind of flow control enabled.
Both MicroTelnets should be power up simultaneously, although they wait 15 seconds before they begin the
test. Each MicroTelnet in Active mode initiates the test by sending the characters ‘A’ through ‘Z’ to the other
MicroTelnet. Because the MicroTelnets are wired in a loop, they send characters on the serial port and network continuously.

Restart
Press the “Restart MicroTelnet” button to force MicroTelnet to restart itself. Any active network connections will be lost when MicroTelnet restarts.
Set to Factory Defaults
Press “Set to Factory Defaults” to cause MicroTelnet to erase its persistent storage. MicroTelnet will revert to a factory default configuration. The current Website will be erased, but the current Firmware will not be altered.
This operation will take about 1 minute. During this time, MicroTelnet’s LED will be blinking indicating that the persistent storage is being erased. Do not remove power while this is happening. After the persistent storage is erased, MicroTelnet will restart and revert to a minimal web page.
You should reload the WebSite ROM file so that you can reconfigure MicroTelnet. See the Update Web Page section on how to reload the WebSite ROM file.

Clear Persistent Storage
Press the “Clear Persistent Storage” button to have MicroTelnet erase its Persistent Storage. The current Website will be erased, but the current Firmware will not be altered. Before erasing the persistent storage MicroTelnet will attempt to save the current configuration parameters so they may be restored after persistent storage is erased. This is useful when persistent storage is getting full and you want to reinitialize it, but don’t want to loose your configuration parameters. If power is lost during this operation, then it likely that the current configuration parameters were not saved and restored.

Update Web Page
The Update web page allows you to load new Firmware or WebSite ROM software. You will do this when new software becomes available. You can also do this to reload the current software. MicroTelnet determines from the contents of the file you select which kind of software is being loaded. The currently loaded Firmware or WebSite version is displayed for reference purposes.
The Update web page will appear slightly different depending on which browser you use. For example, if you are using Internet Explorer.
In either case you will need to press the “Browse...” or “Choose File” button to select the appropriate file. ROM files are named as follows
SPT_Firmware_Vn_naaa.rom
SPT_Website_Vn_naaa.rom
where n_naaa is the version number which corresponds to version n.naaa of the ROM file.
MicroTelnet will attempt to save and restore the current configuration parameters after an update.