Planet - IPX-21FO - 4-Port FXO module for IPX-2100 / IPX-2200 / IPX-2500

Product Overview

The Planet IPX-21FO is a 4-port FXO module for IPX-2100, IPX-2200, and IPX-2500 IP PBX systems, providing connectivity to analog central office loop-start trunk lines (PSTN). Each port features RJ11 connectors with individual LED indicators, supporting loop current detection (13-110mA), ringing detection, off-hook loop current detection, and software-selectable voltage detection thresholds.

Key Configuration

• Ports: 4 × RJ11 (FXO trunk ports)
• Compatibility: IPX-2100, IPX-2200, IPX-2500 IP PBX systems
• Loop current range: 13-110mA
• Battery voltage: Supports PBX with -48V battery voltage
• Voltage detection threshold: Software-selectable
• LED indicators: 1 per port
• Dimensions: 88.5 × 132 mm

Key Features

Detects ring signals in the on-hook state and loop current during off-hook for accurate call status monitoring. Supports DC tip/ring voltage sensing with configurable threshold for flexible detection. Compatible with PBX systems using -48V line voltage. Includes software-adjustable detection levels and 4 RJ11 ports for PSTN trunk connections, requiring one FXO channel per external line. Bridges PBX systems to the PSTN network. Certifications: CE, FCC.

Technical Context

The IPX-21FO is a PBX expansion module adding FXO ports for PSTN analog line connectivity. It enables call handling over traditional telephone networks via telco lines. Each port detects ring, loop current, and voltage changes to manage call states, with configurable thresholds for different line types. Each RJ11 port connects to one PSTN line.

Installation Notes

Dimensions 88.5 × 132 mm (3.48 × 5.20 in.). FXO expansion module for PLANET IP PBX systems, adding 4 RJ11 PSTN trunk ports (one line per channel). Supports -48V telco lines with adjustable voltage detection and 13–110mA loop current for reliable call status handling (ring, loop, DC trigger). Plug-in design for IPX-2100/2200/2500 systems with LED status per port. CE/FCC certified, operating range 0°C to 40°C, 5–95% humidity non-condensing.