IPitomy IP400 User Guide - Manual (Page 11)

Configuration and Application Examples
3
Application Example 2- PSTN Trunk for IP PBX
Organization with IP PBX can use the VoIP Gateway as PSTN trunk for connecting its IP
PBX to PSTN. You can configure the IP PBX as VoIP Gateway’s SIP server and setup the
dial plan on the IP PBX, the VoIP Gateway can be used as PSTN trunk to the IP PBX.
Gateway
IP PBX
PSTN