Cisco NIM-4FXO=Uncategorized

4-Port FXO Voice Network Interface Module

Product Description

The NIM-4FXO= is a 4-port FXO (Foreign Exchange Office) voice interface module from Cisco designed for Cisco ISR 4000 Series routers. It allows integration of analog PSTN lines into VoIP or hybrid voice deployments, providing connectivity for legacy telephone lines directly into Cisco voice-enabled routers.

This module is ideal for branch offices or enterprise locations that need to maintain traditional analog voice circuits while leveraging modern IP telephony and call routing features.

Model Type

4-Port FXO Voice Network Interface Module

Category

Networking – Voice / WAN Expansion Modules

Key Features

Four FXO Ports — Connect up to 4 analog PSTN lines for incoming/outgoing voice calls.

Analog-to-IP Integration — Works with Cisco IOS Voice and Unified Communications to convert analog voice to VoIP.

Supports PRI & Analog Hybrid Deployments — Enables smooth migration from legacy telephony to IP-based systems.

High Availability & Reliability — Enterprise-grade voice quality for branch office or remote deployments.

Software-Configurable — Managed through Cisco IOS XE for call routing, dial plans, and voice quality monitoring.

Compact Internal Module — Fits directly into ISR NIM slots for branch or remote office deployments.

Technical Specs at a Glance

Typical Use Cases

Branch Office Voice Integration — Connect analog PSTN lines to a VoIP-enabled ISR router.

Hybrid Telephony Deployments — Combine legacy analog circuits with modern IP telephony.

Small Office / Remote Office (SOHO) — Maintain analog lines while using Cisco Call Manager or UCM Express.

Disaster Recovery / Redundancy — Provide fallback to analog PSTN lines if IP connectivity fails.