VIC2-4FXO Cisco 4 port voice/fax interface card

Cisco VIC2-4FXO - 4-Port Foreign Exchange Office Voice Interface Card

The Cisco VIC2-4FXO is a voice interface card (VIC) that provides four Foreign Exchange Office (FXO) ports for connecting Cisco routers to the public switched telephone network (PSTN). It enables integration of analog voice lines into IP telephony systems, making it ideal for branch offices and hybrid deployments.

🔧 Key Specifications

• Type: Voice Interface Card (VIC)
• Ports: 4 FXO analog voice ports
• Function: Connects Cisco routers to PSTN or PBX systems
• Compatibility: Cisco 2600XM, 2691, 2800, 2900, 3700, 3800, 3900, 4000 Series ISR routers
• Protocols Supported: SIP, SCCP, MGCP (via IOS)
• Features: Caller ID, call forwarding, conferencing, and supplementary analog services
• Form Factor: Modular VIC card, hot-swappable in supported routers
• Standards: PSTN signaling compliance (loop-start, ground-start)

🧩 Ideal Use Cases

• Branch offices needing PSTN connectivity for IP telephony
• Hybrid deployments integrating analog lines with VoIP systems
• Fax machine and modem support in IP environments
• Backup voice connectivity in case of WAN or VoIP outages

⚙️ Benefits

• Cost-effective PSTN integration: Allows Cisco routers to connect directly to analog telephone lines.
• Flexibility: Supports a wide range of analog calling features.
• High availability: Provides fallback connectivity during WAN or VoIP disruptions.
• Scalability: Can be combined with other VICs for larger deployments.