Cisco Cisco RF Gateway 10

Cisco Systems, Inc.
www.cisco.com

This document provides information about the QAM replication (also known as RF spanning) in the 
Cisco RF Gateway 10 (RFGW-10). 

Following are the two operating use cases for RF spanning:

This use case satisfies the condition where the number of homes passed (HP) by narrowcast video 
services is greater than the number of HP by DOCSIS services. Typically, the ratio of HP by narrowcast 
video services and DOCSIS is 2:1. However, other ratios can also be used. Unique DEPI flows are 
configured on all ports of a Cisco DS-384 line card (without using replication), while QAM Replication 
Group (QRG) is configured for video carriers.

When the ratio of HP by narrowcast video services and DOCSIS is 2:1: