Cisco VIC3-4FXS/DID Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 4-Port Generation 3 Dual-Mode FXS/DID Voice Interface Card
Spare SKU:VIC3-4FXS/DID=
Naming Breakdown
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VIC3: Voice Interface Card, Generation 3
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4: Four software configurable RJ-11 analog ports
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FXS/DID: Dual-mode Foreign Exchange Station / Direct Inward Dial interface
Core Product Positioning
The Cisco VIC3-4FXS/DID is a third-generation pluggable analog voice mezzanine daughterboard built for Cisco multiservice Integrated Services Routers. Each port can be independently configured to operate in FXS mode or DID trunk mode (mutually exclusive). FXS mode supplies power and signaling to connect analog end devices; DID mode receives inbound dialed digits from PSTN central office trunks. This flexible multi-purpose voice card supports medium-density branch VoIP gateways, Survivable Remote Site Telephony (SRST), Cisco Unified Communications Manager Express (CUCME), and hybrid TDM-to-IP telephony migration projects.
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 compatible 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. Full router power cycle required for installation or removal.
Interfaces
4 × RJ-11 dual-mode FXS/DID analog voice ports
Analog Line Characteristics
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Delivers -48V DC line battery and AC ringing voltage
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Supports Caller ID transmission and line polarity reversal
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Maximum 1 REN (Ringer Equivalence Number) per port
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Loop-start analog signaling for analog telephones, fax machines
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Receives inbound dial digits from PSTN central office 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 is not supported while operating in DID mode
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 voice termination for 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) to maintain local calling services during WAN outages
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Cisco Unified Communications Manager Express (CUCME)
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DID number routing for direct PSTN inbound dialing to internal enterprise extensions
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Toll bypass voice connectivity to reduce PSTN long-distance communication expenses
QoS & Transport Interoperability
Works 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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Medium-density branch VoIP gateway mixing analog telephone terminals and PSTN DID trunk circuits
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SRST/CUCME deployments supporting local analog stations plus direct inbound DID routing
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Hybrid IP-TDM telephony migration combining FXS device connections and DID PSTN trunk access
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Distributed office multi-port analog fax termination with optional inbound DID service
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Branch gateway deployments requiring flexible port assignment between station and 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 VIC3-4FXS/DID 4-Port Generation 3 FXS/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 production 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 VIC3-4FXS/DID 4-Port Generation 3 Dual-Mode FXS/DID Voice Interface Card for Cisco 2800/3800 multiservice Integrated Services Routers, delivering software-selectable analog station and DID trunk interfaces for medium-density branch VoIP 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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