Version 7.2  31  Mediant 500L Gateway & E-SBC 
 
User's Manual   1. Introduction 
Configuration Terms  Description 
device does this on behalf of the "served" IP Group. Authentication (SIP 
401) is typically relevant for INVITE messages forwarded by the device to 
a "serving" IP Group. Registration is for REGISTER messages, which are 
initiated by the device on behalf of the "serving" SIP entity. 
 
The associations between the configuration entities are summarized in the following figure: 
Figure  1-1: Association of Configuration Entities