Cisco Systems UBR-3X10 manual Cabling the RF Switch With the Cisco uBR7246VXR CMTS, C H A P T E R

C H A P T E R 5

Cabling the RF Switch With the

Cisco uBR7246VXR CMTS

This chapter provides information about connecting cables between the Cisco uBR 3x10 RF Switch and working and protect cable interface line cards in a Cisco uBR7246VXR CMTS.

This chapter contains the following sections:

•Protection Scheme for the Cisco uBR7246VXR CMTS, page 5-1

•RF Cable Assemblies, page 5-4

•Mapping the Working and Protect Line Cards to the RF Switch, page 5-6

•Installing the Header Blocks on the Cisco uBR 3x10 RF Switch, page 5-7

•Connecting the Cables (Cisco uBR-MC16x Card), page 5-8

•Connecting the Cables (Cisco uBR-MC28x Line Card), page 5-16

•Powering On the RF Switch, page 5-26

Protection Scheme for the Cisco uBR7246VXR CMTS

The N+1 redundancy protection scheme you select for your system depends upon the number of Cisco uBR7246VXR routers and the number and type of cable interface line cards (LC) you have installed in each Cisco uBR7246VXR router.

The 4+1 redundancy scheme in the example configuration (Figure 5-1 on page 5-2) shows the

Cisco uBR-MC16x cable interface line cards (16 downstream ports and 96 upstream ports) installed in the four Cisco uBR7246VXR routers. The fifth router in the rack (also with MC16x cards) serves as the protect router. The same configuration scenario is true for the Cisco uBR-MC28C cable interface line card; however, the cabling between the line cards and the RF switch is different.

As an example, the first working line card (LC1 in routers 1, 2, 3, and 4) is protected by the first line card (LC1) in the Cisco uBR7246VXR protect router. The second working line card (LC2 in routers 1, 2, 3, and 4) is protected by LC2 in protect router, and so on.

Cisco uBR-3x10 RF Switch Hardware Installation and Cabling Guide

OL-1984-06 5-1