ZyXEL Communications ZYWALL USG 1000 - EDITION 2 Manual page 156

Chapter 7 Tutorials
address 1.1.1.2 that you will use on the ge3 interface and map to the IPPBX's
private IP address of 192.168.3.7. The local SIP clients are on the LAN.
Figure 111 IPPBX Example Network Topology
156
ZyWALL USG 1000 User's Guide