Cisco VIC3-2FXO/DID Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 2-Port Generation 3 Dual-Mode FXO/DID Voice Interface Card
Spare SKU:VIC3-2FXO/DID=
Naming Breakdown
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VIC3: Voice Interface Card, Generation 3
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2: Two software-configurable RJ-11 analog voice ports
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FXO/DID: Mutually exclusive Foreign Exchange Office / Direct Inward Dial trunk modes
Core Product Positioning
The Cisco VIC3-2FXO/DID is a third-generation pluggable analog voice mezzanine daughterboard for Cisco multiservice Integrated Services Routers. Each port may be independently set to FXO trunk mode or DID trunk mode. In FXO mode, ports connect to PSTN central office lines or legacy PBX analog trunks for bidirectional calling. In DID mode, ports receive routed inbound dial digits from service provider DID circuits for incoming-only voice connections. This flexible trunk-focused voice card enables hybrid TDM/IP VoIP gateways, Survivable Remote Site Telephony (SRST), Cisco Unified Communications Manager Express (CUCME), and enterprise branch unified communications deployments.
2. Hardware Compatibility & Supported IOS Releases
Supported Host Platforms
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Cisco 2800 Series: 2801, 2811, 2821, 2851
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Cisco 3800 Series: 3825, 3845
Must be installed inside supported voice network modules: NM-HD-1V, NM-HD-2V, NM-HD-2VE, NM-HDV2
Unsupported Platforms
2600XM, 3700 series, ISR 2900/3900 G2 (requires dedicated adapter), ISR 4000 series, Catalyst switching platforms
Minimum Supported IOS Version
IOS 12.4(15)XZ; Validated stable releases: 12.4T, 15.0M, 15.1M, 15.2(4)M
3. Physical & Electrical Specifications
Form Factor
VIC mezzanine daughterboard;non-hot-swappable. A full router power cycle is required for installation or removal.
Interfaces
2 × RJ-11 dual-mode FXO/DID analog trunk ports
Analog Line Characteristics
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Receives -48V battery feed, dial tone and AC ringing signals from PSTN or PBX trunks
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Supports loop-start and ground-start analog signaling
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Caller ID detection for inbound PSTN calls
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CPC call disconnect supervision and battery reversal detection
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Supports CAMA trunk signaling for North American E911 emergency services
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Receives inbound dialed digits from carrier DID trunk circuits
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Inbound-only calling functionality; cannot initiate outbound calls
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Does not supply ring voltage or DC battery feed
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Caller ID detection is not available under DID operation
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Supports wink-start, immediate start and delay-dial DID signaling formats
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 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 network module)
Unified Communications Features
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Survivable Remote Site Telephony (SRST) to maintain PSTN emergency connectivity during WAN outages
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Cisco Unified Communications Manager Express (CUCME)
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DID digit routing for direct inbound PSTN dialing to internal enterprise extensions
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Toll bypass voice routing to reduce long-distance PSTN communication expenses
QoS & Transport Interoperability
Integrates with Cisco IOS QoS mechanisms including Low Latency Queueing (LLQ) and RSVP to prioritize real-time voice traffic over IP, Frame Relay and ATM WAN infrastructures.
Management & Diagnostics
Complete 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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Branch VoIP gateway combining standard bidirectional PSTN trunks and dedicated inbound DID trunk circuits
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SRST/CUCME deployments providing resilient PSTN access and direct DID inbound routing
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Hybrid telephony migration connecting IP voice gateways to legacy analog PBX trunk interfaces
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Enterprise regional office deployments mixing general-purpose FXO PSTN access and DID services
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Gateway deployments requiring flexible port assignment between FXO and DID trunk workloads
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 VIC3-2FXO/DID 2-Port Generation 3 FXO/DID Voice Interface Card
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Hardware installation guide
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Safety and regulatory documentation
End-of-Life Status
The VIC3 voice interface card family has reached Cisco End-of-Sale (EoS). New original hardware manufacturing has been discontinued with limited software maintenance support. Recommended migration: EHWIC-VA series analog voice modules for ISR Generation 2 routers.
UNSPSC Classification Code
43222608 – Cisco VIC3-2FXO/DID 2-Port Generation 3 Dual-Mode FXO/DID Voice Interface Card for Cisco 2800/3800 multiservice Integrated Services Routers, delivering software-selectable bidirectional FXO trunks and inbound-only DID trunk interfaces for flexible branch VoIP gateway 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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