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Cisco

Cisco PVDM4-32U256 | Voice DSP factory upgrade | PVDM4 | channels: 32→256 | ISR 4000 compatible | features: transcoding, conferencing

SKU:PVDM4-32U256

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Description

Factory upgrade to increase a PVDM4-32 to 256 G.711-equivalent channels, adding headroom for transcoding, conferencing, MTP, and T.38 fax on ISR 4000 voice deployments. Intended as a factory-installed capacity upgrade rather than a field-install kit; expands DSP resources for UC/CUBE/SRST workloads.

Features

- Scales DSP resources to 256 channels for dense voice workloads
- Enables hardware-based transcoding and conferencing for consistent call quality
- Supports T.38 fax relay and mixed-codec environments
- Optimized for ISR 4000 UC, CUBE, and SRST deployments

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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FAQs

Technical Specifications

FAQs

Q: Is this a hardware module or a capacity upgrade?
A: It is a factory capacity upgrade that increases an existing PVDM4-32 to 256 channels.

Q: Can I apply this to any router?
A: Use on ISR 4000 Series platforms that support PVDM4; check your router’s PVDM4 slot and platform limits.

Q: Does this require additional licensing?
A: DSP capacity itself does not require a license, but UC/CUBE/SRST features on IOS XE may require feature licenses.

Q: Is this suitable for field installation?
A: No. This SKU represents a factory-installed upgrade path rather than a field-install kit.

Technical Specifications

- Upgrade type: Factory channel upgrade for PVDM4
- From/to capacity: 32 → 256 G.711-equivalent channels
- Functions enabled: voice termination, transcoding, conferencing, MTP, T.38 fax relay
- Supported codecs (platform dependent): G.711, G.729a/b, G.722 wideband
- Platform compatibility: Cisco ISR 4000 Series with PVDM4 slots/voice NIMs
- Software: IOS XE-based UC/CUBE/SRST feature sets
- Scope: Ships as factory-installed capacity; not a standalone field-install kit

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