Cisco NIM-4FXO= Module : 4FXO Ports For PSTN Connectivity & VoIP Integration Cisco Module
 

The Cisco NIM-4FXO= is a high-density Network Interface Module (NIM) designed for ISR 4000 series routers, providing 4 FXO (Foreign Exchange Office) ports to seamlessly integrate PSTN (Public Switched Telephone Network) lines with modern VoIP (Voice over IP) systems. Ideal for businesses transitioning from analog to IP telephony, this module ensures reliable voice connectivity, cost-effective migration, and hybrid communication flexibility.

Key Features & Benefits

✔ 4 FXO Ports – Connect traditional PSTN lines to Cisco UC systems for hybrid deployments.
✔ Seamless VoIP Integration – Works with Cisco Unified Communications Manager (CUCM) and Cisco IOS XE for unified voice management.
✔ PSTN Backup Support – Ensures business continuity by switching to analog lines during IP network outages.
✔ Fax & Modem Compatibility – Supports G.711/G.729 codecs for clear voice and legacy fax/modem communication.
✔ Hot-Swappable & Compact – Fits into ISR 4000 series routers (e.g., 4321, 4331, 4351) without extra power or space requirements.

Technical Specifications (Parameters Table)

Why Choose the Cisco NIM-4FXO= Module?

• Cost-Effective Migration – Retain PSTN lines while moving to VoIP, reducing upfront costs.

• High Reliability – Enterprise-grade hardware with Cisco’s proven voice performance.

• Easy Deployment – Plug-and-play installation with Cisco IOS XE CLI or GUI management.

Ideal for branch offices, call centers, and enterprises needing PSTN backup, fax support, or hybrid telephony, the Cisco NIM-4FXO= ensures smooth integration of legacy and IP communications.