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NIM-4FXO-RF

Cisco Fourth-Generation Network Interface Module - voice / fax module

NIM-4FXO-RF is a professionally remanufactured Cisco 4-Port FXO Network Interface Module (NIM), designed to connect a Cisco ISR 4000 series router to the Public Switched Telephone Network (PSTN) or legacy PBX systems. This module enables analog voice integration in enterprise and branch office environments, supporting up to four simultaneous POTS line connections.

This remanufactured Network Interface Module meets Cisco performance specifications and has been thoroughly inspected and tested prior to shipping. Validation includes analog loop-start and ground-start signaling verification, port-level voice quality testing, and compatibility confirmation with Cisco IOS XE software.

Key Features:
• 4 FXO (Foreign Exchange Office) analog voice ports for PSTN and PBX trunk-side connectivity
• Compatible with Cisco ISR 4321, 4331, 4351, 4431, and 4451 routers via the NIM slot interface
• Supports loop-start and ground-start signaling for flexible PSTN integration
• Enables analog voice and fax transmission over traditional copper telephone lines
• Integrates with Cisco Unified Communications Manager (CUCM) and Cisco Unified CME for call routing
• Remanufactured ("RF") by Cisco to factory specifications, offering a cost-effective alternative to new hardware