Planning and Installation Guide Chapter 14: Site Requirements and Preparation
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Telephone cabling (Category 3 or better) is terminated on the telephone jack and
runs back to the equipment room to a modular connector (RJ-21X) on a telephone
patch panel.
The telephone patch panel provides a flexible cable management solution for the
telephone cabling. The patch panel has RJ-21X connections for the telephone
cabling and RJ-11 connections on the front.
Patch cords are connected from the telephone patch panel (RJ-11) to the voice
switch patch panel (RJ-11).
The voice switch patch panel provides a flexible cable management solution for the
voice switches. The patch panel has RJ-21X connections running to the voice
switches and RJ-11 connections on the front.
Starting from the right in Figure 14-1, the trunk cabling is organized as follows:
The digital (T1/E1) and analog trunks are terminated on a punch-down block.
The digital service is further terminated at a service provider demark with an RJ-48
connector.
An RJ-48 cable from the T1/E1 demark connects to the ShoreGear T1 or ShoreGear
E1.
The analog service is cross-connected to a modular (RJ-21X) punch-down block.
A telco cable is connected to the modular (RJ-21X) punch-down jackand runs to a
modular connector (RJ-21X) on an analog trunk patch panel.
Like the telephone cabling, patch cords are connected from the analog trunk patch
panel (RJ-11) to the voice switch patch panel (RJ-11).
As an alternative, patch panels can be replaced with punch-down blocks. This may be more
cost-effective but is less flexible.
14.4.2 Rack Overview
Figure 14-2 shows a typical rack installation.
A 19-inch data rack, shelf, and modular patch panels can be purchased from most major
electrical suppliers.
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