Tx Matrix Control Plane Cable Considerations; Tx Matrix Fiber-Optic Array Cable Considerations; Figure 35: Using Soft Band Straps To Secure Fiber-Optic Array Cables - Juniper TX MATRIX Hardware Manual

TX Matrix Control Plane Cable Considerations

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TX Matrix Fiber-Optic Array Cable Considerations

Copyright © 2010, Juniper Networks, Inc.
The control plane connections between the T640 routers and the TX Matrix router are
provided by UTP Category 5 Ethernet cables between the RJ-45 ports on the TX-CIPs in
the TX Matrix router and the T-CBs in the T640 routers. The maximum length supported
is 100 m. The UTP Category 5 cables do not have to be the same length. The cable wiring
is straight-through (not crossover).
TX Matrix Cables Overview on page 49
Control Plane Connections Between the TX Matrix Router and T640 Router on page 10
The fiber-optic array cables connect the switching planes of the T640 routers to the
TX Matrix router by connecting the T640-SIBs to the TX-SIBs. When planning your
installation site, consider the following fiber-optic array cable requirements:
You must use the same length for every fiber-optic array cable from a particular T640
router to the TX Matrix router. However, you do not need to use the same length for all
fiber-optic array cables within a routing matrix. For example, if your routing matrix
contains two T640 routers, you can use 6-meter fiber-optic array cables to one router
and 100-meter fiber-optic array cables to the other router.
You must maintain a minimum bend radius of 2 in. (5.1 cm). We recommend that you
maintain a bend radius of 10 in. (25.4 cm). If you must bend a fiber-optic array cable
to a 2-inch radius, we recommend that you do not use more than two such bends.
Plastic wrap-ties can damage or crimp the fiber-optic array cables (see Figure 35 on
page 65). We recommend that you use soft band straps to secure fiber-optic array
cable.

Figure 35: Using Soft Band Straps to Secure Fiber-Optic Array Cables

The fiber-optic array cable connectors must fit through your site's cable conduits. For
the connector dimensions, see Figure 37 on page 67.
In addition, consider the following when planning your installation site:
Chapter 5: Preparing the Site for TX Matrix Router Installation
65