This document will help you understand how SER can be configured for a number of network designs and functional examples. We will start with a very simple hello world example and then build up to a complex network with both SER and asterisk servers together with firewalls and NAT routers.
To help give you an idea of the type of network we will eventually cover and therefore understand the power and flexibility of SER, the diagram below shows our complete reference design.
But first let us start with our hello world design. Based upon our reference design, we will just take a standalone LAN segment that has a single SIP server together with a few SIP phones. .
The area in orange highlights this Hello World design and we will show how to configure SER to perform the following functions:
Registration of devices ( UAs ) to the sip server without any authentication
Establishment of a sip to sip call using INVITE messages