Cisco DNCS System Release 2.8.1 3.8.1 4.3.1 User Guide

Types of Service Groups

A service group is a set of QAM, MQAM, or GQAM modulator channels that provide narrowcast services, most
frequently VOD services, to a unique group of DHCTs. Service groups enable a VOD server to determine which
VOD QAM modulator resources a DHCT can access.

You can add the following types of service groups to the DNCS:



Parent service groups, which contain one or more child service groups



Child service groups, which belong to a parent service group



Standalone service groups, which are independent: they contain no child service groups nor do they

belong to a parent service group

Allowing one service group to belong to another enables you to more effectively manage the different types of
content that your VOD server provides.