Network/Serial Clients - Digi Connect Series User Manual

Digi Connect and ConnectPort TSFamily features
n
RealPort: A single TCP connection manages (potentially) multiple serial ports.
n
Modem emulation, also known as pseudo-modem (pool): A TCP connection to the "pool"
port is interpreted as an incoming call to an available pseudo-modem in the "pool" of available
port numbers.
n
rsh: Digi Connect and ConnectPort TS Family products support a limited implementation of
the remote shell (rsh) protocol, in that a single service listens to connections and allows a
command to be executed. Only one class of commands is allowed: a single integer that
specifies which serial port to connect to. Otherwise, the resulting connection is somewhat
similar to a reverse telnet or reverse socket connection.
n DialServ: Connecting a DialServ device to the serial port. DialServ simulates a public switched
telephone network (PSTN) to a modem and forwards the data to the serial port. The Digi
device sends and receives the data over an IP network.
n
Reverse SSH: An encrypted TCP socket is available for each port that provides a direct
connection to the designated serial port.
n
Reverse telnet: A telnet unencrypted socket is available for each serial port that provides a
telnet style connection directly to the serial port.
n
Raw TCP: A raw TCP unencrypted socket is available for each serial port that provides an 8-bit
clean connection to the serial port
n
TLS/SSL: An TLS/SSL encrypted raw TCP socket is available for each serial port that provides
an 8-bit clean connection to the serial port.
Network services associated with the command-line interface
The following list details network services associated with the command line interface (CLI).
n
Telnet: Use telnet to directly access a Digi Connect and ConnectPort TS Family command-line
interface.
n Rlogin: Perform a remote login (rlogin) to a Digi Connect and ConnectPort TS Family
command-line interface.

Network/serial clients

A network/serial client connection occurs when a Digi Connect and ConnectPort TS Family product
initiates a network connection or opens a serial port for communication. There are several categories
of network/serial client connections:
n Autoconnect behavior client connections
n
Command-line interface (CLI)-based client connections
n
Modem emulation (pseudo-modem) client connections
Autoconnect behavior client connections
In client connections that involve autoconnect behaviors, a Digi Connect and ConnectPort TS Family
product initiates a network connection based on timing, serial activity, or serial modem signals.
Autoconnect-related client connections include:
Digi Connect Family and ConnectPort TSFamily
Network connections and data paths
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