Notes:
• FXO interface is a customer-ordered item.
• FXO is the interface replacing the analog telephone and connects to a Public
Switched Telephone Network (PSTN) line from the Central Office (CO) or to a Private
Branch Exchange (PBX). The FXO is designed to receive line voltage and ringing
current, supplied from the CO or the PBX (similar to an analog telephone). An FXO
VoIP device interfaces between the CO/PBX line and the Internet.
Cable specifications:
Cable: 26 AWG min
Connector Type: RJ-11
Connector Pinouts:
Figure 5-8: RJ-11 Connector Pinouts for FXO Interface
To connect the FXO interfaces:
1. Connect one end of an RJ-11 cable to the device's FXO port (labeled FXO), located on
the rear panel:
Figure 5-9: Connecting FXO Interfaces
2. Connect the other end of the cable to the required telephone interface: (e.g., telephone
exchange analog lines or PBX extensions).