Cisco PVDM2-8 Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 8-Channel Packet Voice Digital Signal Processor Module Generation 2
Spare SKU:PVDM2-8=
Naming Breakdown
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PVDM2: Packet Voice Digital Signal Processor Module, Generation 2
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8: Maximum 8 voice/fax processing channels under low-complexity codec mode
Core Product Positioning
The Cisco PVDM2-8 is a pluggable digital signal processor (DSP) module designed to deliver media processing resources for Cisco Integrated Services Routers. It provides essential hardware DSP capacity for voice encoding/decoding, fax relay, voice transcoding, and audio conferencing. Deployed on ISR voice-capable routers and voice network modules, it enables enterprises to build branch unified communications gateways, interconnect traditional PBX systems, analog telephones and fax machines with IP telephony networks, and implement toll bypass voice services over IP WAN infrastructure.
2. Hardware Compatibility & Supported IOS Releases
Supported Router Platforms
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Cisco 2800 Series: 2801, 2811, 2821, 2851
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Cisco 3800 Series: 3825, 3845
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Compatible Voice Network Modules: NM-HDV2, EVM-HD series voice modules
Unsupported Platforms
1700/2600/3600/3700 legacy routers, ISR 1900/2900/3900 G2, ISR 4000/9000 series (requires PVDM3 / PVDM4), Catalyst switches
Minimum Supported IOS Version
IOS 12.3(8)T and later validated IOS releases including 12.4T, 15.0, 15.1, 15.2(4)M
3. Physical & Electrical Specifications
Form Factor
Compact mezzanine daughter card, pluggable into dedicated PVDM slots on router mainboard or voice network modules
Hardware Chipset
Texas Instruments TMS320C5510 DSP architecture
Channel Capacity
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Low complexity (G.711 / fax pass-through): Up to 8 channels
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Medium complexity (G.726, G.729a, G.729ab): Up to 4 channels
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High complexity (G.729, G.729b, iLBC, G.723.1): Up to 4 channels
Power Consumption
Typical power draw: 2.1 W
Environmental 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 Codecs & Key Functional Features
Voice Codec Support
G.711a / G.711μ, G.726, G.729A, G.729AB, G.729, G.729B, G.723.1, iLBC
Media Processing Functions
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Voice compression and decompression
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T.38 Fax Relay, Fax Passthrough and Modem Passthrough
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Multi-party audio conferencing
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Transcoding between different voice codecs
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Echo cancellation, voice activity detection (VAD), comfort noise generation (CNG)
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Jitter buffer management for real-time voice traffic
Architecture Characteristics
Supports Flexi Complexity, Medium Complexity and High Complexity DSP operating modes. All DSP resources on a single voice network module must share identical codec complexity configuration.
Management & Diagnostics
Full configuration and monitoring via Cisco IOS CLI
DSP resource utilization monitoring, DSP firmware upgrade, loopback testing, voice call debugging
SNMP v1/v2c/v3 and Syslog event reporting for telephony status and error alarms
5. Typical Deployment Scenarios
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Small branch office VoIP gateway supporting analog phone lines or small digital trunk traffic
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SRST (Survivable Remote Site Telephony) deployment for backup voice services when WAN fails
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Low-density fax over IP services using T.38 fax relay
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Voice codec transcoding between local PSTN trunks and IP phone networks
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Audio conferencing resources for remote-site unified communications
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Toll bypass voice connectivity to reduce traditional PSTN long-distance charges
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: EU RoHS 2.0 compliant, WEEE compliant
7. Standard Factory Package Contents
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Cisco PVDM2-8 8-channel Packet Voice DSP Module
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Installation guide
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Safety and regulatory documentation
End-of-Life Status
The PVDM2 family has reached Cisco End-of-Sale (EoS). No new original manufacturing, limited software maintenance support. Recommended migration: PVDM3 modules for ISR G2 routers or modern ISR 4000 platforms with PVDM4 media modules.
UNSPSC Classification Code
43222608 – Cisco PVDM2-8 8-channel Generation 2 Packet Voice DSP Module for Cisco 2800/3800 series Integrated Services Routers, providing hardware-based voice compression, fax relay, transcoding and conferencing media processing resources for enterprise branch IP telephony deployments.
Hardware Warranty
New original modules carry a 1-year limited Cisco factory warranty covering manufacturing defects. Warranty terms for refurbished units follow reseller agreements.
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