Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

 

Switching Plane Cable Connections and Considerations

 

Switching plane cables connect a line-card chassis (LCC) to the TX Matrix Plus router switch-fabric chassis (SFC). When planning your installation site, consider the following switching plane cable requirements:

  • You must use the same length for every switching plane cable from a particular LCC to the TX Matrix Plus router. However, you do not need to use the same length for all switching plane cables within a routing matrix. For example, if your routing matrix contains two LCCs, you can use 6-meter switching plane cables to one LCC and 100-meter switching planecables to the other LCC.

  • For fiber-optic array cables, you must maintain a minimum bend radius of 4 in. (10.2 cm) short term, and 3 in. (7.6 cm) long term .

  • For CXP cables and active optical cables (AOC), you must maintain a minimum bend radius of 4 in. (10.2 cm) short term, and 3 in. (7.6 cm) long term.

  • Plastic wrap-ties can damage or crimp the switching plane cables (see Figure 1). We recommend soft band straps to secure switching plane cables.

    Figure 1: Using Soft Band Straps to Secure Switching Plane Cables
    Using Soft Band
Straps to Secure Switching Plane Cables
  • The switching plane cable connectors must fit through your site's cable conduits.

In addition, consider the following when planning your installation site:

  • Make sure that each LCC is close enough to the location of the TX Matrix Plus router, particularly in a distributed configuration. Consider the length of the longest switching plane cables (100 meters), along with their routing through overhead raceways and mounting racks.

  • Plan the management of the switching plane cables between the LCC and the TX Matrix Plus router, keeping in mind the following considerations:

    • We recommend that you purchase additional switching plane cables for each LCC in the TX Matrix Plus router in case any cables become damaged. Route the spare cables when you route the main cables, particularly in a distributed configuration.

    • For each T1600 router with TXP-T1600 SIBs, there are 20 fiber-optic array cables, or a total of up to 80 cables for four T1600 routers that connect to the TX Matrix Plus Router with TXP-F13 SIBs.

    • For each T1600 router with TXP-LCC-3D SIBs, there are 20 switching plane cables, or up to 160 cables for eight T1600 routers that connect to the TX Matrix Plus Router with TXP-F13-3D SIBs.

    • For each T4000 router, there are 40 switching plane cables, or up to 160 cables for four T4000 routers that connect to the TX Matrix Plus Router with TXP-F13-3D SIBs.

    • The switching plane cables must not interfere with TX Matrix Plus router and LCC airflow and maintenance access. For an illustration of the TX Matrix Plus router airflow, see TX Matrix Plus Cooling System Description. For LCC airflow, see the T1600 Core Router Hardware Guide and T4000 Core Router Hardware Guide.

Figure 2: Fiber-Optic Array Cable for Connections Between the TX Matrix Plus Router and T1600 Routers
Fiber-Optic Array Cable for
Connections Between the TX Matrix Plus Router and T1600 Routers