Contemporary Control Systems Compact Managed Switches Software Manual for Console Access - Manual (Page 12)

TD020850-0MG
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4.3.2 Configure Ports
Figure 6 shows how individual Ethernet ports can be Enabled or Disabled. Also, the
operating data rate or “speed” and duplex can be given a specific setting or be set to
auto-negotiate.
NOTE: Certain models use fibre optic cable on two ports. For these ports, the only Speed/Duplex
option is Full or Half Duplex. The Speed for fibre ports is fixed at 100 Mbps.
A single Ethernet cable will link two devices. When these devices auto-negotiate, the
data rate will be 100 Mbps only if both are capable of that speed. Likewise, full-duplex
will only be selected if both can support it. If only one device supports auto-negotiation,
then it will match the data rate and duplex mode of the non-auto-negotiating device.
Sometimes it is advantageous to select a fixed data rate and duplex setting on both
Ethernet devices to eliminate the auto-negotiation process.
When interconnecting two switches, crossover cables are normally used — but if one
switch uses Auto MDIX, the communication can be via either straight-through cable or
crossover cable. This functionality does not require both switches to have Auto MDIX.
Figure 6 — Configure Ports Menu
NOTE: The sample screen above is the first of two displayed for a 16-port switch — or the first of
three displayed for a 24-port switch. The succeeding screens are accessed by choosing
the Continued option just above the dashed line. This option is not displayed in the
Configure Ports screen of an 8-port switch.