4.1 Two TURN Clients Connecting Using SIP

In the following diagram, TURN Client1 has a local transport address of 10.0.0.1:12345, which places it in network site1. TURN Client2 has a local transport address of 10.0.10.1:45678, which places it in network site2. The TURN server implementing this protocol extension has a local address of 10.0.0.2:3478 and a public transport address, from which it allocates relay transport addresses, of 192.0.2.20. The public transport address of the TURN server is configured so that it is associated with network site1. Both clients can route directly to the TURN server. There is a 1.54 megabytes WAN link, Wan link1, that connects network site2 to network site1.

Figure 3: Two TURN clients connecting using SIP