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Supported connections and data paths in Digi devices
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Supported connections and data paths in Digi devices
Digi devices allow for several kinds of connections and paths for data flow between the
Digi device and other entities. These connections can be grouped into two main
categories:
Network services, in which a remote entity initiates a connection to a Digi
device.
Network/serial clients, in which a Digi device initiates a network connection or
opens a serial port for communication.
This discussion of connections and data paths may be helpful in understanding the effects
of enabling certain features and choosing certain settings when configuring Digi products.
Network services
A network service connection is one in which a remote entity initiates a connection to a
Digi device. There are several categories of network services:
Network services associated with specific serial ports
Network services associated with serial ports in general
Network services associated with the command-line interface (CLI)
Network services associated with specific serial ports
Network service connections associated with specific serial ports include:
Reverse Telnet: A telnet connection is made to a Digi device, in which data is
passed transparently between the telnet connection and a named serial port.
Reverse raw socket: A raw TCP socket connection is made to a Digi device, in
which data is passed transparently between the socket and a named serial port.
Reverse TLS socket: An encrypted raw TCP socket is made to a Digi device, in
which data is passed transparently to and from a named serial port.
LPD: A TCP connection is made to a named serial port, in which the Digi
device interprets the LPD protocol and sends a print job out of the serial port.
Modem emulation, also known as Pseudo-modem (pmodem): A TCP
connection is made to a named serial port, and the connection will be
“interpreted” as an incoming call to the pseudo-modem.