Connecting To The Network; Connecting Utp Cables To 7H4385-49 - Enterasys MATRIX 7H4385-49 Hardware Installation Manual

Connecting to the Network

This section provides the procedures for connecting unshielded twisted pair (UTP)
segments from the network or other devices to the 7H4385‐49 ("Connecting UTP Cables to
7H4385‐49" on page 3‐15).

Connecting UTP Cables to 7H4385-49

The fixed RJ45 front panel connections of the 7H4385‐49 are 10/100 Mbps ports. These
ports have internal crossovers, and support automatic‐polarity sensing when configured
for automatic‐negotiation.
If automatic‐negotiation is not activated on a port, use a straight‐through cable when
connecting a workstation to the port. When connecting a networking device to the port,
such as a bridge, repeater, or router, use a crossover cable.
If a port is set for auto‐negotiation, automatic‐polarity sensing is also activated.
Automatic‐polarity sensing eliminates the need for a crossover cable, regardless if the
connection is to another network device or a workstation.
The RJ45 fixed front panel connectors of the 7H4385‐49 also support PoE‐compliant
connections to PDs (powered devices) that require 48 Vdc through the UTP cable to
operate. Whether the 48 Vdc is available through the backplane of an N5 chassis or
externally from an N‐POE Power System, you can verify if there is power at each port as
described later in this procedure.
Note: If the DFE module is being installed in a network using Link Aggregation, there are
rules concerning the network cable and port configurations that must be followed for Link
Aggregation to operate properly. Before connecting the cables, refer to the Enterasys
Matrix DFE-Platinum Series Configuration Guide for the configuration information. For
details on how to obtain manuals, refer to the
Note: All RJ45 front panel ports on the 7H4385-49 support Category 5 Unshielded
Twisted Pair (UTP) cabling with an impedance between 85 and 111 ohms. Category 3
cable may be used if the connection is going to be used only for 10 Mbps.
"Related Documents" in
DFE-Platinum Series Hardware Installation Guide 3-15

Connecting to the Network

About This Guide.