Microhard Systems VIP4G - IP Protocol Config; TCP Client; TCP Server

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4.0 Configuration
This setting determines which protocol the serial server will use to
transmit serial port data over the VIP4G network.
The protocol selected in the IP Protocol Config field will determine
which configuration options appear in the remainder of the COM1
Configuration Menu.
The serial port will not work unless the IP Protocol Config has been
configured properly. Once serial data is collected at the serial port, the
modem must be told how to deal with it, and where to send it.
IP Protocol Config
Values (selection)
TCP Client
TCP Server
TCP Client/Server
UDP Point-to-Point
SMTP Client
SMS Transparent Mode
GPS Transparent Mode
The protocol selected in the
IP Protocol Config field will
determine which configuration
options appear in the
remainder of the COM1
Configuration Menu.
TCP Client: When TCP Client is selected and data is received on its serial port, the VIP4G 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 VIP4G 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 VIP4G 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’ (‘handshaking’)
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.