Lantronix ETS16PR User Manual download pdf (Page 23)

Using the ETS

ETS Installation Guide 23

4. To return to the menu from your Linux session, press the configured Local Switch

key. In this case, the Local Switch is Ctrl-X (see Figure 4-10).

Note: Switch keys only work within sessions. They do not work from the menu

screen - you must enter a menu number to go to a session from the menu screen.

Serial Tunnel Example

Two ETS device servers can be connected to emulate a direct serial connection

across a LAN or WAN. Servers connected in this way can pass data only—they will

not be able to pass status signals (DSR/DTR, CTS/RTS, etc.) or preserve timing

between characters. The basic network configuration for this virtual serial line is

shown in Figure 4-15.

Figure 4-15. Back-to-Back ETS Connections

TCP Configuration

Assuming the ETS serial port parameters have been configured properly, the ETS

device servers in Figure 4-15 are configured as follows:

ETS_A

Local>> DEFINE PORT 2 DEDICATED TELNET 192.168.5.10:3001T

Local>> DEFINE PORT 2 AUTOSTART ENABLED

ETS_B

Local>> DEFINE PORT 3 ACCESS REMOTE

Local>> DEFINE PORT 3 DEDICATED NONE

Local>> DEFINE PORT 3 AUTOSTART DISABLED

Note: If the ETS device servers are on different IP subnets, configure the

default gateway on each unit with the Change Gateway command.

The above commands create a raw (8-bit clean) TCP connection between ETS_A

port 2 and ETS_B port 3 once the units have been power-cycled. The commands for

ETS_A ensure that it will automatically connect to ETS_B each time it is booted. The

commands for ETS_B ensure that it is always available to accept connections from

ETS_A. Once this connection is made, data is able to travel in both directions.

Note: You must log out the ETS ports after configuring them so that the commands

can take effect.

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Lantronix ETS16PR User Manual Page 23