User guide

4: Installing the SpiderDuo
SecureLinx Spider/SpiderDuo User Guide 39
 Microsoft Active Desktop and Linux virtual desktop are not supported. If bandwidth is a
concern, plain backgrounds are preferred.
Mouse-to-Cursor Synchronization
Mouse-to-cursor synchronization can be an issue with digital KVM interfaces because PS/2 mice
transmit incremental information about movement over a period of time rather than an absolute
measurement.
The OS driver translates acceleration-to-distance based on the local screen resolution and applies
linear or nonlinear acceleration mappings. When a remote client communicates with the target
server, settings and screen resolutions on both sides of the connection must be taken into account
to get natural mouse-to-cursor tracking.
Use the USB keyboard and mouse when supported by the target computer. Unlike the PS/2
interface, a USB mouse uses absolute coordinates rather than relative coordinates and does not
present translation issues between the local and remote computers.
The PS/2 model sets the keyboard and mouse interface to Auto. When it first attempts to use the
USB interface, and if it does not detect a USB interface, it falls back to PS/2.
There are no restrictions on the mouse settings of the client systems and no special care must be
taken when setting mouse parameters of target servers for USB mice. The PS/2 interface
performance (tracking) and synchronization can be optimized by removing any special
acceleration or nonlinear ballistics.
Perform the following steps to configure the mouse-to-cursor synchronization.
 Windows Server
1. Select Control Panel > Mouse > Pointer Options.
2. Set the pointer speed to medium and disable Enhanced pointer precision.
 Linux Server
1. Set Mouse Acceleration to exactly 1 and threshold to exactly 1.
 Solaris Server
1. Set the mouse settings by using the CDE control panel to “1:1, no acceleration” or “xset m 1”.
Telnet/SSH Connections to Serial Ports
To Telnet/SSH to a target computer serial port, you must Telnet/SSH to the SpiderDuo serial port
first and use connect serial CLI. This connects your SpiderDuo to the target computer serial
port. The default settings are 9600 bps, 8 data bits, 1 stop bit, no parity, and no flow control. The
pinout of the included SpiderDuo cables match a standard DB9 COM port.
Cable Connections for KVM and USB
Connections for video, USB, and keyboard/mouse are integrated into the SpiderDuo. Plug the
SpiderDuo directly into the appropriate ports on the host syste. If using the serial port, cable it to
the appropriate COM port on the server. Available extended-length cables are shown in Table 4-9.
Table 4-9 Extended Length Cables
Item Part Number
USB connecter; 1500 mm, (59 in.) VGA cable 500-199-R