PVDM4‑128 Specifications
Cisco Packet Voice Digital Signal Processor Module (PVDM)
Manufacturer: Cisco
Manufacturer Model: PVDM4‑128
Product Line: PVDM4 (4th-generation Packet Voice DSP)
Product Series: 128-Channel High-Density DSP
Product Type: DSP Module (Voice / Media)
Product Name: Cisco PVDM4‑128 Voice DSP Module
KEY FEATURES:
Provides hardware voice / media DSP capabilities for routers
Supports 128 “low-complexity” voice channels
Supports 96 “medium-complexity” voice channels, 64 “high-complexity” voice channels
Supports conferencing, transcoding, media optimization, and secure voice
Echo cancellation: up to 128 ms tail, compliant with ITU-T G.168
Power-saving mode available when module is not in use
PERFORMANCE:
DSP architecture: multicore DSP optimized for rich-media voice
Supports a variety of codecs: G.711, G.729, etc.
Used for TDM (e.g., T1/E1) voice packetization, transcoding, conferencing
ENVIRONMENTAL & RELIABILITY:
Operating Temperature: 0 °C to 50 °C
Power Consumption: ~4.85 W
Voltage: 3.3 V
PHYSICAL:
Interface / Slot: Placed on on-board motherboard slot or in a T1/E1 Network Interface Module (NIM)
Dimensions: ~0.67 in × 2.50 in × 2.62 in (H × W × D)
Weight: ~0.08 lb (~36 g)
COMPATIBILITY & USE CASES:
Compatible with Cisco ISR 4000 Series routers
Ideal For:
High-density voice deployments
Voice conferencing
Codec transcoding / media optimization
Secure voice / secure conferencing

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