Enterasys Networks 2H252-25R User Manual

This section provides the procedures for connecting unshielded twisted pair (UTP) and fiber optic 
segments from the network or other devices to the 2H252-25R.

Ports 1 through 24 on the 2H252-25R are 10/100 ports with internal crossovers. When connecting 
a workstation, use a straight-through cable. When connecting networking devices, such as another 
bridge, repeater, or router, use a crossover cable.

To connect a twisted pair segment to the 2H252-25R, proceed as follows:

1. Ensure that the device connected to the other end of the segment is powered ON.

2. Connect the twisted pair segment to the 2H252-25R by inserting the RJ45 connector on the 

twisted pair segment into the appropriate RJ45 port on the device. 

pair segment being plugged into port 7.

NOTE: If the 2H252-25R is being installed in a network using SmartTrunking, there are 
rules concerning the network cable and port configurations that must be followed for 
SmartTrunking to operate properly. Before connecting the cables, refer to the Enterasys 
Networks SmartTrunk User’s Guide for the configuration information.

NOTE: If a port is connected to a 10-Mbps segment, Category 3 Unshielded Twisted 
Pair (UTP) cable is sufficient to use. However, if the segment is to carry 10- or 
100-Mbps transmissions, use only Category 5 UTP cabling that has an impedance 
between 85 and 111 ohms.