3Com 5112M-TPLS Redundant Links, 3. Redundant Twisted Pair Configuration

In the example shown in Figure 2-2, if two patch panels were used between the top right PC and the top right concentrator, you would have to shorten the link distance of 100 meters to 90 meters. This is because the maximum allowable link distance on 22 gauge wire using 10BASE-T signaling with two intervening patch panels is 100 meters minus approximately 10 meters.

Note that a patch panel installed between the bottom right PC and the bottom left concentrator would not affect the link because it is only 20 meters away.

Redundant Links

You can implement twisted pair link redundancy between ONline System Concentrators using network management. Figure 2-3 shows an example of a redundant configuration between concentrators using Security Modules.

Figure 2-3. Redundant Twisted Pair Configuration

2 - 12 ONline 10BASE-T Security Module Installation and Operation Guide