Socket behavior Transparent mode behavior for incoming TCP connections
Digi XBee3 Cellular LTE-M Global Smart Modem User Guide
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Transparent mode behavior for incoming TCP connections
The C0 (Source Port) and IP (IP Protocol) settings specify the listening port and protocol used for
incoming connections (TCP) and incoming data (UDP) in Transparent mode. SSL is not currently
supported for incoming connections.
When the IP setting is TCP and there is no existing connection to or from the XBee Smart Modem, the
device accepts one incoming connection. Any data received on the connection is sent out the XBee
Smart Modem's serial port. Any data sent to the XBee Smart Modem's serial port is sent over the
connection. If the connection is disconnected, it discards pending data.
Transparent mode behavior for incoming UDP connections
When the IP (IP Protocol) setting is UDP any data sent from a remote host to the XBee Smart
Modem's network port specified by C0 (Source Port) is sent out the XBee Smart Modem's serial port.
Any data sent to the XBee Smart Modem's serial port is sent to the network destination specified by
the DL (Destination Address) and DE (Destination Port) settings. If the DL and DE settings are
unspecified or invalid, the XBee Smart Modem discards data sent to the serial port.
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