© Microhard Systems Inc. 56
4.0 WebUI Configuration
Protocol Config
This setting determines which protocol the serial server will use to transmit serial port data over the IP
Series network. Ensure that the firewall allows access to the assigned ports by either creating rules to
allow it, or by setting the WAN Request to allow.
TCP Client: When TCP Client is selected and data is received on its serial port, the IPn3G takes the
initiative to find and connect to a remote TCP server. The TCP session is terminated by this same unit
when the data exchange session is completed and the connection timeout has expired. If a TCP
connection cannot be established, the serial port data is discarded.
Remote Server Address
IP address of a TCP server which is ready to accept serial port data through a TCP
connection. For example, this server may reside on a LAN network server.
Default: 0.0.0.0
Remote Server Port
A TCP port which the remote server listens to, awaiting a session connection request from
the TCP Client. Once the session is established, the serial port data is communicated from
the Client to the Server.
Default: 20001
Outgoing Connection Timeout
This parameter determines when the IPn3G will terminate the TCP connection if the
connection is in an idle state (i.e. no data traffic on the serial port).
Default: 60 (seconds)
TCP Server: In this mode, the IPn3G will not INITIATE a session, rather, it will wait for a Client to request
a session of it (it’s being the Server—it ‘serves’ a Client). The unit will ‘listen’ on a specific TCP port. If a
session is established, data will flow from the Client to the Server, and, if present, from the Server to the
Client. If a session is not established, both Client-side serial data, and Server-side serial data , if present,
will be discarded.
Local Listening Port
The TCP port which the Server listens to. It allows a TCP connection to be created by a TCP
Client to carry serial port data.
Default: 20001
Incoming Connection Timeout
Established when the TCP Server will terminate the TCP connection is the connection is in
an idle state.
Default: 300 (seconds)
TCP Client/Server: In this mode, the IPn3G will be a combined TCP Client and Server, meaning that it
can both initiate and serve TCP connection (session) requests. Refer to the TCP Client and TCP Server
descriptions and settings described previously as all information, combined, is applicable to this mode.
The protocol selected in
the Protocol Config field
will determine which
configuration options
appear in the remainder
of the COMn
Configuration Menu.
UDP: User Datagram
Protocol does not provide
sequencing information
for the packets sent nor
does it establish a
’connection’ (‘handshakin
g’) and is therefore most
suited to communicating
small packets of data.
TCP: Transmission
Control Protocol in
contrast to UDP does
provide sequencing
information and is
connection-oriented; a
more reliable protocol,
particularly when large
amounts of data are being
communicated.
Requires more bandwidth
than UDP.
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