User manual

MyPBX-SOHO User Manual
www.yeastar.com Page 58
5. Use MyPBX
5.1 Make outbound call
To make an outbound call, we need to add trunk/service provider first. There
are two types of service provider:
·Analog Ports: FXO ports of MyPBX, connect to local PSTN
·SIP Trunk: Connect to remote SIP VOIP service provider server
What are FXO and FXS?
FXS (Foreign eXchange Station) is an interface wihich drives a telephone or FAX
machine. FXS interfaces get phones plugged into them, delivery battery, and
provide ringing, FXS interfaces are signaled with FXO signaling.
FXO (Foreign eXchange Office) is an interface that connects to a phone line.
They supply your PBX with access to the public telephone network. FXO
interfaces use FXS signaling. FXS interfaces are what allow you to hook
telephones to your PBX, and FXO interfaces allow you to connect your PBX to
real analog phone lines.
PSTN
PSTN
Normal Phone
IP Phone
601
602
FXS Lines LAN
FXO Lines
IP Provider
Soft Phone
Router