Cabling The 10Base-T (Rj-21) Module; Connecting 10Base-T (Rj-21) To A Harmonica Panel - 3Com CoreBuilder 2500 Getting Started Manual

4-4 C 4: C
HAPTER ABLING

Cabling the 10BASE-T (RJ-21) Module

The 10BASE-T (RJ-21) module provides eight
10BASE-T connections with one Telco connector.
The connections are implemented as MDI-X (media
dependent interface crossover) connections,
meaning that a workstation or other DTE can be
directly connected to the port with a
straight-through cable.
To cable the 10BASE-T (RJ-21) module:
Insert the mounting post and washer into the
1
threaded hole of the cable end of the male Telco
connector.
Connect the male Telco connector on the 10BASE-T
2
cable to the female Telco connector on the module.
Ensure that the slide latch is to the right.
Slide the latch to the left and ensure it grips the
3
mounting posts.
Tighten the connector securing screws.
4
Attach the other end of the 10BASE-T cable in one
5
of these ways:
Attach it to a harmonica panel with RJ-45 ports,
as described in the next section.
Punch the individual wires into a Type 66 or Type
110 punch-down block, as described on page 4-5
in "Connecting 10BASE-T (RJ-21) to a
Punch-down Block."
Figure 4-2 shows the cabling of the 10BASE-T
(RJ-21) module using 10BASE-T cable.
PCMCIA
Inserted
Port Status
Active
Error
1 2 3 4 5
Port Status
ard Active
or
Error
Securing screws
RJ-21 connector
Figure 4-2 Cabling the 10BASE-T (RJ-21) Module
Connecting 10BASE-T (RJ-21) to a Harmonica
Panel
Up to three modules with RJ-21 connectors can
connect to a single harmonica panel, each through
a 50-pin connector. Each harmonica panel provides
24 RJ-45 connections for various network devices.
Figure 4-3 shows the RJ-45 connections on the front
of the harmonica panel.
of the panel, including the connections for the
50-pin connectors. Harmonica panels are available
from 3Com.
6 7 8
10BASE-T (RJ-21)
module
10BASE-T cable
Figure 4-4 shows the back