User guide

34 CATx KVM Extender Local Hubs
Hardware Flow Control
The serial daughterboards in both Local Hub and Remote Units have a series of
jumpers that allow the selection of alternative hardware flow control schemes
across the CATx link (see Figure 10). Most applications will not require
hardware flow control across the link, and therefore the flow control jumpers
are set to loopback by default and should not need adjustment.
The following diagrams show how the jumpers may be set for various flow
control schemes. Please contact Technical Support if you are unsure about
serial port handshaking methods.
No hardware handshaking RTS/CTS and DTR/DSR
loopback – default
DTR/DSR Flow Control
Across CATx Link
RTS CTS
DTR DSR
RTS CTS
DTR DSR
RTS CTS
DTR DSR
RTS/CTS Loopback
DTR/DSR Flow Control
(Printer)
RTS/CTS Flow Control
Across CATx Link
(Serial Mouse)
DTR/DSR Loopback
RTS/CTS Flow Control
RTS CTS
DTR DSR
RTS CTS
DTR DSR
RTS CTS
DTR DSR
Figure 12 Jumper Settings on Flow Control block for various serial port flow
control and handshaking configurations (see Figure 10 for location of
jumper block)