PLANET IPX-1980 - Manual (Page 23)

3.3 Outbound Call
3.3.1 Trunks
If you want to set up outbound call to connect to PSTN(Public Switch Telephone Network)
or VoIP provider, please configure on this page: 【Basic】->【Trunks】
Planet IP PBX supports 3 kinds of trunks: Analog/GSM line, Custom VoIP, Peer.
How to add each trunk:
1) Analog/ GSM Line
Click 【Add a Dial Rule】->【Analog/GSM】
23