Network Technologies ST-nXm-U operation manual RS232 Control, Remote Connection, Baud Rate

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NTI NODEMUX MULTI-USER UNIVERSAL KVM SWITCH

RS232 CONTROL

Remote Connection

The RS232 Interface is designed to meet the RS232C standard and can be controlled from any CPU or other controller with an RS232 communications port. The pin outs for the DB9 connector on the unit are as follows:

RS232 Connector (DB9 FEMALE)

 

PIN

 

 

SIGNAL

 

 

FUNCTION

 

 

 

 

 

 

 

1

 

 

None

 

no connection

2

 

 

TXD

 

Transmit Data (RXD at host)

3

 

 

RXD

 

Receive Data (TXD at host)

4

 

 

DSR

 

Data Set Ready

5

 

 

GND

Signal Ground

6

 

 

DTR

 

Data Terminal Ready

7

 

 

CTS

 

Clear to Send

8

 

 

RTS

 

Request to Send

9

 

 

none

 

no connection

NOTE: Security must be disabled (see Administration Options on page 14) or user access granted (see System Access List on page 15) on the port(s) to be selected by RS-232 control.

On the DB-9 female connector, pins 1 (DCD), 4 (DTR), and 6 (DSR) are shorted and pins 7 (RTS) and 8 (CTS) are shorted. Therefore, CPU handshaking is bypassed and TXD and RXD are the only active signals. A straight through DB9 cable (not null modem) will work for most CPUs. To daisy chain multiple units, the CPU drives the input port on the first unit and the output port is connected to the input port on the next unit etc. The last unit will have a loop back plug installed in its RS232 OUT connector.

Baud Rate

The baud rate can be changed by selecting MENU on the front panel keypad. Then select 1 for SET BAUD RATE and select the desired baud rate of 9600, 4800, 2400 or 1200. A data protocol of 8 data bits, no parity, and 1 stop bit is used for communications.

Unit Address and Loop Back

To allow multiple units to be controlled from a single CPU port, the RS232 control interface is designed to allow "daisy chaining" up to 15 units. By setting the appropriate unit address with the keypad, each unit can be given a unique address (1-15). Then the unit will only respond to commands on the bus if its address is embedded in the command.

To set the unit address using the front panel keypad,

1.Press <MENU>

2.press <2> for “SET UNIT ADDRESS“

3.enter the address number (1-15)

4.press <ENTER>.

The "loop back" plug should be on the RS232 OUT connector on the last unit in the chain. If only one unit is being controlled, the loop back plug should be on the RS232 OUT connector on that unit.

Host

CPU

RS232

Serial

Port

RS232 RS232

IN OUT

NTI

SWITCH

Unit Address 1

RS232 RS232

IN OUT

NTI

SWITCH

Unit Address 2

Loop back

Plug installed

RS232 RS232

IN OUT

NTI

SWITCH

Unit Address 15

Figure 14- RS232 connection with "IN" and "OUT" ports

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Contents ST-nXm-U Trademark Table of Contents Table of Figures Features IntroductionCompatibility Supported CPUsSupported Keyboards Supported MonitorsST-nXm-U Switch Ordering InformationMaterials Materials Supplied with this kit includeInterface Cables WhereFeatures and Functions NTIRack Mounting Instructions Mount the Nodemux to a rackInstallation & Configuration NTIVKTINT-1 VEXT-xx-MM Rear View of PS/2 CPUCable Selection Guide For CPU and Keyboard/Mouse VEXT-xx-MMPS/2 Keyboard & Mouse SUN Keyboard & MouseUsing the NTI Nodemux Universal KVM Switch Basic OperationKeypad Control USR CPU 5 EnterSecurity Option with Password Enabling The Security FeatureFactory default settings are OSD ControlOSD Modes Available With Security Enabled User LoginAdministration Key Enter Esc FunctionAdministration Options Port StatusKey Esc Function System Access List User Name ListUser Access Functions Command ModeEdit Mode Key/Sequence Home End Insert Delete Backspace FunctionSearch Mode Maintenance ModeKey Backspace Alphanumeric Esc Enter Function Key FunctionSUN DDC Configuration Help ModeWhen connected to SUN with pgX32 or pgX64 video card RS232 Control Remote ConnectionBaud Rate Unit Address and Loop BackWiring Schematic of Matrix-Y-1 cable RS232 Matrix-Y-1 CPU Serial PortFirst Unit Second Unit Last Unit RS-232 Command Protocol RS-232 Command Protocol Quick ReferenceNTI Nodemux MULTI-USER Universal KVM Switch SerTest- RS232 Interface Test Program Main OptionsSetup Options RMTEST-RS232 Interface Test ProgramMain Options Matrix OptionsKeyboard Mapping Key EquivalentsSUNs Startup Keys SUN Keyboard Troubleshooting SpecificationsWarranty Information Index

ST-nXm-U specifications

Network Technologies ST-nXm-U is a pivotal solution designed to enhance network connectivity and performance in various applications. At its core, this technology is developed to support high-bandwidth requirements while ensuring reliable and efficient data transmission. The ST-nXm-U platform integrates several advanced features and technologies to cater to the evolving demands of modern networking.

One of the main characteristics of ST-nXm-U is its flexibility in supporting multiple network topologies, including point-to-point and multipoint configurations. This versatility allows organizations to implement the technology in diverse environments, ranging from corporate networks to industrial applications. Furthermore, ST-nXm-U seamlessly integrates with existing network infrastructures, facilitating easy upgrades without needing comprehensive overhauls.

In terms of performance, the ST-nXm-U technology boasts high-speed data transfer rates, capable of handling large volumes of data with low latency. This ensures that critical applications, such as video conferencing and cloud computing, run smoothly without interruptions. Additionally, ST-nXm-U leverages advanced error correction methods and data integrity checks, enhancing the reliability of transmitted information.

One notable feature of Network Technologies ST-nXm-U is its support for both copper and fiber-optic cabling. This dual compatibility allows organizations to choose the most suitable medium for their specific needs, optimizing performance while minimizing costs. Moreover, the technology supports a variety of protocols, including Ethernet, ensuring compatibility with numerous devices and systems.

Security is another paramount consideration in the design of ST-nXm-U. The platform incorporates robust encryption methods to protect data during transmission, thereby safeguarding sensitive information from unauthorized access or breaches. This, coupled with network monitoring tools, enables administrators to maintain oversight and quickly respond to potential security threats.

Finally, the installation and management of the ST-nXm-U technology are designed to be user-friendly. The intuitive interface simplifies the configuration process, while comprehensive support documentation ensures that users can maximize the benefits of the system. This focus on ease of use is vital for enabling organizations to leverage high-performance networking technologies quickly and effectively.

In summary, Network Technologies ST-nXm-U represents a significant advancement in networking solutions, offering flexibility, high performance, security, and user-friendly management, making it an ideal choice for organizations seeking to enhance their network capabilities.
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