With an active approach, you leverage a solution that allows you to emulate a real user experience, for example, making a phone call between two endpoints and measuring the quality. Active solutions are deployed using software-based endpoints that can be centrally controlled to talk to one another, and only one another, so they do not disturb the user community.
To start the process off, perform a “Network Readiness Assessment” or NRA. Note, however, that this concept means different things to different people. I have seen some customers perform NRAs on their own in a variety of different ways, I’ve seen third parties perform them for customers, and some IP Telephony vendors require that the NRA be performed by them in order for them to support their product.
When I talk about end to end SIP I am looking at SIP all the way in from the carrier trunks, through the core infrastructure, and out to the phones (hard phones or soft phones). With that out of the way, let’s talk more about some of the questions that need to be answered and some of the key things that you, the customer, need to do in order to make your SIP deployment successful.