User manual

Supported connections and data paths in Digi devices
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Network/serial clients
A network/serial client connection is one in which a Digi device initiates a network
connection or opens a serial port for communication. There are several categories of
network/serial client connections:
 Autoconnect behavior client connections
 Command-line interface (CLI)-based clients
 Modem emulation (pseudo-modem) client connections
Autoconnect behavior client connections
In client connections that involve autoconnect behaviors, a Digi device initiates a network
connection based on timing, serial activity, or serial modem signals. Autoconnect-related
client connections include:
 Raw TCP connection: The Digi device initiates a raw TCP socket connection to
a remote entity.
 Telnet connection: The Digi device initiates a TCP connection using the Telnet
protocol to a remote entity.
 Raw TLS encrypted connection: The Digi device initiates an encrypted raw
TCP socket connection to a remote entity.
 Rlogin connection: The Digi device initiates a TCP connection using the rlogin
protocol to a remote entity.
Command-line interface (CLI)-based client connections
Command-line interface based client connections are available for use once a user has
established a session with the Digi device’s CLI. CLI-based client connections include:
 telnet: A connection is made to a remote entity using the Telnet protocol.
 rlogin: A connection is made to a remote entity using the Rlogin protocol.
 connect: Begin communicating with a local serial port.
Modem emulation (pseudo-modem) client connections
When a port is in the modem-emulation or pseudo-modem mode, it can initiate network
connections based on AT command strings received on the serial port.The AT commands
for modem emulation are documented in the Digi Connect Family Command Reference.