Network Services Associated With Serial Ports In General; Network Services Associated With The Command-Line Interface; Network/Serial Clients; Autoconnect Behavior Client Connections - Digi ConnectPort LTS Series User Manual

Network connections and data paths
Modem: The Modem Profile allows you to attach modem devices to the serial port to establish
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or receive connections from other systems and modems. Both the modem dial-in and bi-
directional options provide a login from the Digi device.
Reverse SSH: A remote entity establishes an SSH connection to a ConnectPort LTS serial port
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and data passes transparently between the SSH connection and a named serial port.

Network services associated with serial ports in general

The following list details network services associated with serial ports in general.
RealPort: A single TCP connection manages (potentially) multiple serial ports.
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Modem emulation, also known as pseudo-modem (pool): A TCP connection to the "pool" port
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is interpreted as an incoming call to an available pseudo-modem in the "pool" of available port
numbers.
rsh: ConnectPort LTS products support a limited implementation of the remote shell (rsh)
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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.

Network services associated with the command-line interface

The following list details network services associated with the command line interface (CLI).
SSH: Use Secure Shell (SSH) to directly access a ConnectPort LTS command-line interface.
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Telnet: Use telnet to directly access a ConnectPort LTS command-line interface.
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Rlogin: Perform a remote login (rlogin) to a ConnectPort LTS command-line interface.
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Network/serial clients

A network/serial client connection occurs when a ConnectPort LTS product initiates a network
connection or opens a serial port for communication. There are several categories of network/serial
client connections:

Autoconnect behavior client connections

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Command-line interface (CLI)-based client connections
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Modem emulation (pseudo-modem) client connections
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Autoconnect behavior client connections
In client connections that involve autoconnect behaviors, a ConnectPort LTS product initiates a
network connection based on timing, serial activity, or serial modem signals. Autoconnect-related
client connections include:
Raw TCP connection: The ConnectPort LTS initiates a raw TCP socket connection to a remote
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entity.
Digi ConnectPort LTS User Guide
Network/serial clients
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