© Microhard Systems Inc.
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4.0 Configuration
This setting determines which protocol the serial server will use
to transmit serial port data over the IPn4G network.
The protocol selected in the IP Protocol Config field will
determine which configuration options appear in the remainder
of the COM0/COM1 Configuration Menu.
IP Protocol Config
Values (selection)
TCP Client
TCP Server
TCP Client/Server
UDP Point-to-Point
UDP Point-to-Multipoint (P)
UDP Point-to-Multipoint(MP)
UDP Multipoint-to-Multipoint
SMTP Client (COM0)
PPP (COM0)
GPS Transparent Mode
TCP Client:
When TCP Client is selected and data is received on its serial port, the IPn4G
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 IPn4G 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 IPn4G Series 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)
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.
