Cisco VIC2-4FXO Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 4-Port Generation 2 Universal Foreign Exchange Office Voice Interface Card
Spare SKU:VIC2-4FXO=
Naming Breakdown
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VIC2: Voice Interface Card, Generation 2
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4: Four physical analog trunk ports
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FXO: Foreign Exchange Office analog trunk interface
Core Product Positioning
The Cisco VIC2-4FXO is a second-generation pluggable analog voice mezzanine daughterboard designed for Cisco multiservice integrated routers. FXO trunk ports receive dial tone, battery feed and ringing signals from external PSTN central office lines or analog trunk ports of legacy PBX systems. This universal analog voice card enables medium-density analog PSTN gateway deployments, supporting toll bypass, Survivable Remote Site Telephony (SRST), Cisco Unified Communications Manager Express (CUCME), CAMA E911 trunk connectivity and hybrid TDM-to-IP telephony migration for enterprise branch offices.
2. Hardware Compatibility & Supported IOS Releases
Supported Host Platforms
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Cisco 1760, 2600XM, 2691
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Cisco 2800 Series: 2801, 2811, 2821, 2851
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Cisco 3700 Series: 3725, 3745
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Cisco 3800 Series: 3825, 3845
Must be installed within compatible voice network modules: NM-HD-1V, NM-HD-2V, NM-HD-2VE, NM-HDV2
Unsupported Platforms
Legacy non-XM 2600 routers, ISR 2900/3900 G2 (requires dedicated adapter), ISR 4000 series, Catalyst switching platforms.
Minimum Supported IOS Version
IOS 12.3(7)T; Validated stable releases: 12.4T, 15.0M, 15.1M, 15.2(4)M
3. Physical & Electrical Specifications
Form Factor
VIC mezzanine daughter card;non-hot-swappable. Router power cycle required for installation and removal.
Interfaces
4 × RJ-11 universal FXO analog trunk ports
Analog Line Characteristics
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Accepts -48V battery feed, dial tone and ringing from PSTN/PBX trunks
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Supports loop-start and ground-start analog signaling modes
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Caller ID detection for inbound PSTN calls
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CPC (Call Progress Control) disconnect supervision
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Battery reversal detection and CAMA trunk support for emergency E911 services
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Software configurable country telephony profiles for global deployment
Typical Power Consumption
Environmental Operating Parameters
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Operating Temperature: 0°C to 40°C (32°F – 104°F)
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Storage Temperature: -40°C to 70°C (-40°F – 158°F)
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Relative Humidity: 5% – 85% non-condensing
4. Supported Features & Functional Capabilities
Voice & Fax Services
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Analog PSTN trunk termination for Voice over IP (VoIP) gateway routing
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T.38 Fax Relay, Fax Passthrough and Modem Passthrough
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ITU-T compliant acoustic echo cancellation, Voice Activity Detection (VAD), Comfort Noise Generation (CNG)
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Dynamic jitter buffer management (DSP resources required on host voice module)
Unified Communications Features
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Survivable Remote Site Telephony (SRST) for local PSTN emergency access during WAN outages
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Cisco Unified Communications Manager Express (CUCME)
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Toll bypass to reduce enterprise long-distance PSTN communication costs
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Inbound Caller ID detection from service provider circuits
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Support for CAMA trunks for North American emergency E911 deployments
QoS & Transport Interoperability
Integrates with Cisco IOS QoS mechanisms including LLQ and RSVP to prioritize real-time voice traffic over IP, Frame Relay and ATM WAN infrastructures.
Management & Diagnostics
Full configuration, monitoring and troubleshooting via Cisco IOS CLI
Voice port loopback testing, real-time voice call debugging, event logging via Syslog and SNMP v1/v2c/v3
5. Typical Enterprise Deployment Scenarios
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Medium-density branch VoIP gateway connecting multiple analog PSTN service lines
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SRST/CUCME deployments providing redundant PSTN trunk access upon WAN connectivity failure
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Hybrid telephony migration connecting IP voice gateways to legacy analog PBX trunk ports
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Multi-line analog fax trunk connectivity for inbound and outbound Fax over IP services
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Enterprise regional branch gateway with CAMA trunk support for emergency E911 calling
6. Regulatory & Compliance Certifications
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Safety Standards: UL 60950-1, CSA C22.2 No.60950-1, IEC/EN 60950-1
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EMC Compliance: CE Mark, FCC Part 15 Class A, ICES-003 Class A, VCCI Class A
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Environmental Directives: EU RoHS 2.0 compliant, WEEE compliant
7. Standard Factory Package Contents
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Cisco VIC2-4FXO 4-Port Generation 2 FXO Voice Interface Card
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Hardware installation guide
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Safety and regulatory documentation
End-of-Life Status
The complete VIC2 voice interface card family has reached Cisco End-of-Sale (EoS). New original hardware production has been discontinued with limited software maintenance support. Recommended migration: EHWIC-VA series analog voice modules for ISR G2 routers.
UNSPSC Classification Code
43222608 – Cisco VIC2-4FXO 4-Port Generation 2 FXO Voice Interface Card for Cisco 2800/3800 multiservice Integrated Services Routers, delivering multi-port analog trunk interfaces to PSTN lines and legacy PBX systems for medium-density branch VoIP gateway, E911 CAMA trunk and hybrid unified communications deployments.
Hardware Warranty
Brand-new original modules carry a 1-year limited Cisco factory warranty covering manufacturing defects. Warranty terms for refurbished hardware follow reseller contractual agreements.
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