ZyXEL Communications USG-100@USG-200 - V2.20 ED 2 - Page 173

Chapter 7 Tutorials
ZyWALL USG 100/200 Series User’s Guide
173
address 1.1.1.2 that you will use on the wan2 interface and map to the IPPBX’s
private IP address of 192.168.3.7. The local SIP clients are on the LAN.
Figure 136 IPPBX Example Network Topology