3Com 5112M-TPLS installation and operation guide Theory of Operation, Application

Models: 5112M-TPLS

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Features 'hot swap' capability so that you can install or remove the module without having to power down the concentrator

In addition, the Security Module allows you to disable Link Integrity, which allows the module to be connected to equipment that does not conform to the 10BASE-T standard.

Before installing the Security Module into the ONline System Concentrator, read the ONline System Concentrator Installation and Operation Guide.

Theory of Operation

The Security Module incorporates repeaters and twisted pair transceivers in its hardware:

Repeaters restore phase and frequency. Repeated signals synchronize to the system clock and enter on the ONline concentrator's TriChannel™ backplane. Outgoing signals from the TriChannel backplane are sent directly to transceivers to be transmitted to twisted pair link segments.

Transceivers receive and restore amplitude to incoming signals.

Application

Attach the Security Module to a patch or punchdown block using bundled 25-pair or 12-leg hydra cables. This provides connections for the 12 twisted pair ports, as shown in Figure 1-1.

1 - 2 ONline 10BASE-T Security Module Installation and Operation Guide

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3Com 5112M-TPLS installation and operation guide Theory of Operation, Application