ZyXEL Communications VPN Series Handbook page 413

How to configure the USG when using a Cloud Based SIP
system
This example shows how to configure USG when there is a Cloud Based SIP system. The
IP phones are more and more popular nowadays. USG supports the scenario as IP
phones located in LAN and connect to internet to register the SIP server.
IP
IP
IP
SIP Phone connects to SIP server via USG.
Note: All network IP addresses and subnet masks are used as examples in this article. Please
replace them with your actual network IP addresses and subnet masks. This example was
tested using USG210 (Firmware Version: ZLD 4.25).
USG
WAN IP
www.zyxel.com
SIP
int
413/810