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Cisco

Cisco PVDM4-128 | Voice DSP module | 128 channels | Gen4 DSP | Wideband codecs (G.711/G.729/G.722) | Conferencing + transcoding | Secure RTP | ISR 4300/4400 compatible

SKU:PVDM4-128

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Description

Deliver high‑density voice services with a 128‑channel Gen4 DSP optimized for next‑generation branch routers. Supports wideband codecs, conferencing, transcoding, T.38 fax, and secure RTP for resilient unified communications at scale.

Features

- 128-channel high-density voice processing
- Gen4 DSP performance for next-generation branch routers
- Wideband audio with G.722 for superior call quality
- Built-in conferencing and transcoding
- Secure RTP media encryption support
- Drop-in installation to PVDM4 slots

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: Which platforms support this Gen4 DSP module?
A: Routers in the 4300 and 4400 series that provide Gen4 DSP (PVDM4) slots.

Q: Does it support secure media?
A: Yes, it supports Secure RTP (SRTP) for encrypted voice streams.

Q: What voice functions are offloaded to the DSP?
A: Transcoding, conferencing, tone detection/generation, and media termination are handled by the DSP.

Q: Is any license needed to use all 128 channels?
A: No additional RTU license is required; the module provides a fixed 128-channel capacity.

Q: Does it support T.38 fax?
A: Yes, T.38 fax relay and modem passthrough are supported.

Technical Specifications

- Channel capacity: 128 concurrent voice channels
- DSP generation: Gen4 packet voice DSP
- Functions: transcoding, conferencing, media termination
- Supported codecs: G.711, G.729a/b, G.722, G.726
- Fax/modem: T.38 fax relay, modem passthrough
- Voice security: Secure RTP (SRTP)
- Echo cancellation: ITU-T G.168 (up to 128 ms tail)
- Platform compatibility: Integrated Services Routers 4300/4400 series (Gen4 DSP slots)
- Form factor: Onboard DSP module for router PVDM4 slot
- Licensing: Fixed 128-channel capacity

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