No news here: there are many versions of this on the internet, and we’re all using the old one:

(Source: http://technet.microsoft.com/en-us/library/gg425891.aspx)

This diagram is important in any Lync discussion as it shows exactly the ports and protocols required for Lync Edge servers and Reverse Proxy, and the traffic flow between the DMZ and the LAN.

However, I find it a little outdated (Office Web Apps missing) and sometimes I need a little more space to draw some stuff and write down IP addresses and other stuff when meeting with customers and colleagues.
I drew an updated, more spacious one for my use, shared with your here:

There’s also a PDF version of this here.