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Chapter 4: Cabling the Networking Ports
Cabling the Twisted Pair Ports
The guidelines for cabling the 10/100Base-T and 10/100/1000Base-T twisted pair ports are:
The cable specifications for the 10/100Base-T and 10/100/1000Base-T twisted pair ports
are listed in Table 1 on page 22 and Table 2 on page 24, respectively.
The connectors on the cables should fit snugly into the ports, and the tabs should lock
the connectors into place.
The default setting for the wiring configurations of the ports is auto-MDI/MDI-X. The
default setting is appropriate for switch ports that are connected to 10/100Base-T
network devices that also support auto-MDI/MDI-X.
The default auto-MDI/MDI-X setting is not appropriate for switch ports that are
connected to 10/100Base-T network devices that do not support auto-MDI/MDI-X and
have a fixed wiring configuration. For switch ports connected to those types of network
devices, you should disable auto-MDI/MDI-X and set the wiring configurations manually.
The appropriate MDI/MDI-X setting for a switch port connected to a 10/100Base-T
network device with a fixed wiring configuration depends on the setting of the network
device and whether the switch and network device are connected with straight-through
or crossover cable. If you are using straight-through twisted pair cable, the wiring
configurations of a port on the switch and a port on a network device must be opposite
each other, such that one port uses MDI and the other MDI-X. For example, if a
network device has a fixed wiring configuration of MDI, you must disable auto-MDI/
MDI-X on the corresponding switch port and manually set it to MDI-X. If you are using
crossover twisted pair cable, the wiring configurations of a port on the switch and a port
on a network device must be the same.
The default speed setting for the ports is Auto-Negotiation. This setting is appropriate
for ports connected to network devices that also support Auto-Negotiation.
The default speed setting of Auto-Negotiation is not appropriate for ports connected to
10/100Base-T network devices that do not support Auto-Negotiation and have fixed
speeds. For those switch ports, you should disable Auto-Negotiation and set the port's
speed manually to match the speeds of the network devices.
The 10/100/1000Base-T ports must be set to Auto-Negotiation, the default setting, to
operate at 1000Mbps.
The default duplex mode setting for the ports is Auto-Negotiation. This setting is
appropriate for ports connected to network devices that also support Auto-Negotiation
for duplex modes.
The default duplex mode setting of Auto-Negotiation is not appropriate for ports
connected to network devices that do not support Auto-Negotiation and have a fixed
duplex mode. You should disable Auto-Negotiation on those ports and set their duplex
modes manually to avoid the possibility of duplex mode mismatches. A switch port using
Auto-Negotiation defaults to half duplex if it detects that the end node is not using
Auto-Negotiation, which can result in a mismatch if the end node is operating at a fixed
duplex mode of full-duplex.
If the Ethernet cables will be connected to equipment that is located outdoors, such as a
AT-IE200 Series Installation Guide
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