Operation; Setup; Pin Assignments - Tripp Lite NetDirector B024-H4U16 Owner's Manual

12. RS-232 Operation
The KVM's built-in bi-directional RS-232 serial interface allows system control through a high-end controller or PC.
RS-232 serial operations in the KVM installation are managed via HyperTerminal sessions on systems that are
running Windows. In order to use this feature to send commands to the KVM, you must first download and install a
HyperTerminal application.

12.1 Setup

Install a HyperTerminal application on a computer that is not part of the installation, which will be used to control the
switch via the RS-232 connection. HyperTerminal applications can be download from the Internet and many operating
systems are embedded with HyperTerminal applications.
Hardware Connection
Use a the Firmware Upgrade Cable provided with this unit to connect a computer's serial port to the Firmware Upgrade
Port on the KVM's front panel, as shown in the diagram below:
Note: B024-H4U16 model shown. The port locations are the same for the B024-H4U08, except for the number of KVM ports.
12.2 RS-232 Pin Assignments
Pin assignments for the B024-H4U08 and B024-H4U16 KVM Firmware Upgrade Port are used for connecting to a serial
terminal.
Pin
1
2
3
4
Firmware Upgrade Cable
TXD: Transmit Data
RXD: Receive Data
N/A
GND: Signal Ground
45
Assignment
RJ11 Female