Cisco VIC3-4FXS Cisco network interface module
Brand: Cisco | Category: Accessories & Components
SKU: CSC-VIC3-4FXS | Part #: VIC3-4FXS | MPN: VIC3-4FXS
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About the Cisco VIC3-4FXS Cisco network interface module
The Cisco VIC3-4FXS Voice Interface Card adds four FXS ports to Cisco ISR routers, enabling direct integration of analog telephone devices and legacy PBX systems into modern VoIP infrastructures. This VIC3 slot module delivers on-hook/off-hook detection, ring generation, and loop-start signaling to support traditional telephony endpoints while leveraging Cisco's unified voice architecture.
Network engineers and voice infrastructure teams rely on the VIC3-4FXS (part number VIC3-4FXS) to bridge analog and IP voice environments without replacing existing telephone hardware. The module supports Caller ID and integrates seamlessly with Cisco Unified CME and Cisco SRST for call control and survivability. Installation requires Cisco IOS Software with voice feature set, and genuine Cisco modules like this one qualify for TAC support eligibility and manufacturer support, ensuring enterprise-grade reliability and vendor validation throughout the product lifecycle.
Deployment Scenarios
- Branch office analog phone preservation—connect existing FXS-compatible phones to Cisco 2900 Series ISR or 3900 Series ISR routers without hardware replacement
- Legacy PBX gateway integration—extend analog trunk lines into VoIP networks while maintaining backward compatibility with installed systems
- Survivable Remote Site Telephony (SRST)—provide call continuity for remote locations using analog endpoints during WAN outages
- Multi-tenant or campus deployments—scale analog port capacity across distributed Cisco ISR platforms using modular VIC3 architecture
- Unified messaging and fax support—enable fax and voice mail integration through analog-connected devices on the same router infrastructure
For procurement teams evaluating genuine Cisco voice interface modules, contact Omnixon Global to request a detailed quote and technical specifications tailored to your network topology.
Technical Specifications
| Brand | Cisco |
| Category | Accessories & Components |
| SKU | CSC-VIC3-4FXS |
| Part Number | VIC3-4FXS |
| Condition | New |
| Interface | 4x FXS |
| Manufacturer Part Number | VIC3-4FXS |
| Module Type | Voice Interface Card (VIC3) |
| Port Type | FXS (Foreign Exchange Station) |
| Number of Ports | 4 |
| Form Factor | VIC3 slot module |
| Signaling Support | Loop-start |
| Compatible Router Series | Cisco 2900 Series ISR, Cisco 3900 Series ISR |
| Software Requirement | Cisco IOS Software with voice feature set |
| Caller ID Support | Yes |
| Ring Generation | Yes |
| On-Hook/Off-Hook Detection | Yes |
| Integration | Cisco Unified CME, Cisco SRST |
| Product Authenticity | Genuine Cisco |
| TAC Support Eligibility | Yes — genuine Cisco module required for TAC validation |
| Manufacturer Support | Included |
Frequently Asked Questions about Cisco VIC3-4FXS Cisco network interface module
What does the Cisco VIC3-4FXS Cisco network interface module do?
The Cisco VIC3-4FXS Cisco network interface module is enterprise IT hardware deployed in production data centers, server rooms, and edge sites across the GCC and EMEA region.