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Cisco NIM-2FXS/4FXO-RF Voice Interface Card (VIC) - 2 FXO + 4 FXS Ports for 4451-X ISR
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Product Features
Technical Overview
This Voice Interface Card delivers dedicated voice connectivity through its six-port configuration. The two FXO ports are designed to connect the router to analog telephone lines from a service provider, allowing for inbound and outbound PSTN (Public Switched Telephone Network) calls. The four FXS ports enable direct connection of analog devices such as telephones, fax machines, or modems to the router, providing station-side functionality.
As a Network Interface Module (NIM), it installs directly into the Cisco 4451-X ISR, leveraging the router's processing power and network integration capabilities. The card operates exclusively for voice applications, ensuring optimized performance for telephony traffic without competing with data routing functions.
Key Product Advantages
This VIC simplifies voice network expansion by consolidating multiple interface types into one module, reducing hardware footprint and complexity within the router chassis. Its hybrid port design supports versatile deployment scenarios, from connecting to central office lines to supporting legacy analog devices on-site.
Hybrid Connectivity
Combines FXO for trunk lines and FXS for station devices, enabling comprehensive analog telephony support in a single card.
- 2 FXO ports for PSTN connectivity
- 4 FXS ports for analog device connection
Platform Integration
Designed specifically for the Cisco 4451-X ISR, ensuring full compatibility and optimized performance within the router ecosystem.
- Seamless installation as a NIM
- Leverages router management features
Cost-Effective Expansion
The refurbished condition provides reliable voice functionality at a reduced investment, ideal for extending service life of existing infrastructure.
- Fully tested refurbished unit
- Maintains Cisco quality standards
Deployment / Use Cases
The Cisco NIM-2FXS/4FXO-RF VIC is ideal for organizations requiring analog telephony integration within their Cisco-based network infrastructure. It serves as a bridge between traditional telephone systems and modern IP networks, supporting gradual migration or hybrid operation.
Common deployment scenarios include small to medium businesses maintaining analog fax lines or emergency phones, branch offices with existing analog extensions, and environments where legacy devices must coexist with VoIP systems. The card enables the Cisco 4451-X router to function as a voice gateway, handling both PSTN connectivity and local analog device management.
Branch Office Voice Gateway
Deploy in remote offices to connect local analog phones and fax machines while maintaining PSTN backup lines through FXO ports.
Legacy System Integration
Use to incorporate existing analog telephone equipment into a Cisco unified communications environment without replacing all endpoints.
Highlights
- Voice Interface Card (VIC) for Cisco 4451-X Integrated Services Routers
- 2 FXO ports for PSTN/analog trunk line connectivity
- 4 FXS ports for analog station device connection
- Total of 6 voice ports in a single module
- Designed exclusively for voice applications
- Network Interface Module (NIM) form factor
- Refurbished condition with full functionality
- Enables hybrid analog/IP telephony deployments
Specifications
| Specifications | |
|---|---|
| Manufacturer | Cisco Systems, Inc |
| Manufacturer Part Number | NIM-2FXS/4FXO-RF |
| Brand Name | Cisco |
| Product Name | Voice Interface Card (VIC) |
| Product Condition | Refurbished |
| Product Type | Voice Interface Card (VIC) |
| Technical Information | |
| Application/Usage | Voice |
| Interfaces/Ports | |
| Total Number of Ports | 6 |
| Interfaces/Ports Details | 2 x FXO Network,4 x FXS Network |
| Miscellaneous | |
| Compatibility | Cisco 4451-X Integrated Services Router |
FAQ
What router models are compatible with this Voice Interface Card?
This Voice Interface Card is specifically designed for and compatible with the Cisco 4451-X Integrated Services Router (ISR). It installs as a Network Interface Module (NIM) in the router's expansion slots. The card is not compatible with other Cisco router models or non-Cisco equipment.
What is the difference between FXO and FXS ports on this card?
The two FXO (Foreign Exchange Office) ports connect to analog telephone lines from a service provider, allowing the router to interface with the PSTN (Public Switched Telephone Network). The four FXS (Foreign Exchange Station) ports connect directly to analog devices like telephones, fax machines, or modems, providing station-side functionality. This combination enables both trunk and station connections in one module.
What does 'refurbished condition' mean for this product?
This Voice Interface Card has been professionally refurbished, which includes thorough testing, cleaning, and verification of all functionality. Refurbished Cisco hardware provides reliable performance at a reduced cost compared to new units, making it an economical choice for expanding voice capabilities on compatible routers while maintaining quality standards.
| Qty | Price | Available |
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