ZyXEL Communications P-2802H(W)(L)-I Series - Manual (Page 39)

Chapter 1 Introducing the ZyXEL Device
P-2802H(W)(L)-I Series User’s Guide
39
Figure 3 Internet Telephony Service Provider Application
1.4.4 Making Peer-to-peer Calls
You can call directly to someone’s IP address without using a SIP proxy server. Peer-to-peer
calls are also called “Point to Point” or “IP-to-IP” calls. You must know the peer’s IP address
in order to do this.
The following figure shows a basic example of how you would make a peer-to-peer VoIP call.
You use your analog phone (A in the figure) and your device (B) changes the call into VoIP
and sends the call through the Internet to the peer VoIP device (C).
Figure 4 Peer-to-peer Calling