User's Manual

MDS 05-6399A01, Rev. D MDS Master Station 57
TCP Server/Client
As the name implies, TCP Server/Client is a combination of the TCP Server mode, and TCP Client mode.
In this mode, the Master Station will listen for incoming TCP connections and pass data exactly as in TCP
Server mode. However if there is no active server connection, and over-the-air payload traffic arrives at
the Master Station, the Master Station will establish an outgoing TCP connection to a remote server and
transmit that data to the remote server. A use-case for this mode of operation is if you wish to have the
protocol reliability of TCP, but do not wish to maintain active TCP sessions across your network.
TCP Server/Client specific configuration options include:
Local IP Port – The TCP port number that the server will listen for connections on.
IPv4 Bind IP – If the Master Station is configured with multiple IP interfaces; you can specify
that the IP Payload service only will listen for connections on one of the IP
addresses of the system. This is useful in VLAN configurations where you wish
to only make the IP Payload server available on a specific VLAN in the system.
Server IP Address – The IP address of the server the Master Station is to connect to.
Remote IP Port – The TCP port that the server is listening on.
UDP
When operating in UDP mode, the IP Payload service uses the connectionless UDP protocol. Since UDP
is connectionless, there must be receiving sockets at each end of the connection to allow for bi-directional
communications. In this mode, when an application has traffic to send out over the SD network, it will
establish a UDP connection to the Master Station and transmit the payload data. When the Master Station
receives over-the-air payload data from remote SD radios, the Master Station will establish a UDP