B&B Electronics VESR321_ML_SL - Manual - Manual (Page 20)

Properties
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16
Default Gateway
The Default Gateway address sets the default route to remote networks, enabling users to
access the serial server from outside the local network.
Delimiters
Delimiters and Delimiter Removal enable you to control how characters received on a serial port
are sent across the network. Delimiters are ASCII characters specified by the user when
configuring the serial server. The serial server takes action when it recognizes the specified
character(s) on its serial port.
Delimiter 1
Delimiter 1 is a start delimiter. The range of ASCII values is 1 through 255.
Delimiter 2
Delimiter 2 is an end delimiter. The range of ASCII values is 1 through 255.
Delimiter Removal
Delimiter Removal controls removing of Delimiter 1 and Delimiter 2 from the received characters
before the received characters are sent to the network.
How Delimiters Work
When only Delimiter 2 (the end delimiter) is enabled, characters received by the serial port are
accumulated in a buffer. When the end delimiter is received on the serial port, the buffered
characters, including the end delimiter, are sent to the network. All characters received after the
end delimiter are again buffered until another end delimiter is received.
When both Delimiter 1 (start delimiter) and Delimiter 2 (end delimiter) are enabled, characters
received by the serial port will be discarded until the start delimiter character is detected on the
serial port. The serial server then buffers the start delimiter character and all subsequent
characters received after it until the end delimiter is detected. When the end delimiter is received,
the buffered characters, including the start and end delimiters, are sent to the network.
Note that if the buffer becomes completely full the buffered characters are sent to the network
regardless of whether Delimiter 2 is received or not. After the data is sent to the network, newly
received characters are buffered until Delimiter 2 is received.
When Delimiter Removal is enabled it removes the delimiter character(s) before sending the
other characters across the network.
DHCP
DHCP (Dynamic Host Configuration Protocol) is a protocol used on special servers that supply
IP addresses to network nodes on request.
When DHCP is enabled on the serial server, on power up it sends a DHCP request to the DHCP
server, which assigns a dynamic IP address, subnet mask, and default gateway to the serial
server.