Lantronix ETS, Справочное руководство

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Port Commands Ports
5-2
Before a user can Telnet from the network to a ETS port and dial out using an attached modem, the port
must be set for dynamic or remote access. To log into a port locally and Telnet to a remote host, set the port
for local or dynamic access. To configure port access, use the Define Port Access command. Access must
be configured with Define commands since the configuration is reset to the saved values every time a user
logs in or connects to a service on that port.
Figure 5-3: Configuring Connection Type
If a connection to a service is failing, check the port’s access mode first.
5.1.2 Serial Configuration
5.1.2.1 Baud Rate
The ETS and attached serial device, such as a modem, must agree on a speed or baud rate to use for the serial
connection. The default speed is 9600 baud. Other baud rates can be set with the Set/Define Port Speed
command followed by a baud rate number.
Figure 5-4: Changing the Baud Rate
The ETS also supports Autobaud, which attempts to configure the port’s speed and parity by analyzing the
first <Return> keys typed at login. To enable this feature, type the following command.
Figure 5-5: Enabling Autobaud
Autobaud will not work for devices that do not “log in” (such as printers and modems) and will not function
for baud rates less than 1200 or for certain parity and character size settings (8-bit, no parity and 8-bit, even
parity are acceptable). If the attached devices will be using one speed permanently, Autobaud can remain
disabled. See the Set/Define Port Autobaud command on page 12-28.
Terminal devices that will be running at 9600 baud will not need the autobaud feature, and can generally be
used with the factory-set configuration. Ports that will be used for non-terminals (for example, printers) will
probably have to be configured separately, as will terminals that won’t work with autobaud. Other than these
cases, terminal-dedicated ports should need no special configuration.
The ETS’s parity, character size, and stop bits should be configured as shown in the following sections.
5.1.2.2 Flow Control
Flow control enables two connected devices to control the amount of data transmitted between them. When
flow control is enabled on a ETS port and a connected device (for example, a modem), it ensures that data
sent from the sending device will not overflow the receiving device’s buffers.
The ETS supports both hardware (RTS/CTS) and software (XON/XOFF) flow control. Hardware flow
control is recommended. The two methods are described in the following sections.
Local>> DEFINE PORT 2 ACCESS DYNAMIC
Local>> DEFINE PORT 4 SPEED 2400
Local> DEFINE PORT ALL AUTOBAUD ENABLED