PVDM4-128 – 128-Channel Voice DSP – Motherboard or T1/E1 NIM Slot – PVDM4 Module
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PVDM4-128 Description
PVDM4-128 is a Cisco PVDM4 voice DSP module that provides the 128-channel high-density DSP tier for Cisco 4000 Series ISR digital voice deployments.
The main order difference is placement. PVDM4-128 belongs to the motherboard or T1/E1 module-slot path, while NIM-PVDM-128 is the Network Interface Module slot version for IP-based voice services only.
Quote review should confirm the target ISR 4000 platform, the available motherboard or T1/E1 NIM DSP position, the required codec complexity, and whether the design needs TDM voice services or only media services such as conferencing and transcoding.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
PVDM4-128 |
|
Product family |
Cisco Packet Voice Digital Signal Processor Modules |
|
Product type |
PVDM4 voice DSP module |
|
Cisco description |
128-channel high-density voice DSP module |
|
Slot type |
On-board motherboard or T1/E1 module slot |
|
Supported platform family |
Cisco 4000 Series ISRs except ISR 4461 for motherboard PVDM4 support |
|
Low-complexity channels |
128 |
|
Medium-complexity channels |
96 |
|
High-complexity channels |
64 |
|
TDM voice service path |
Supported when installed on a T1/E1 NIM |
|
Motherboard service path |
IP media services such as conferencing and transcoding |
|
Minimum software listing |
IOS XE 3.10 / XE SD-WAN 17.3 / vManage 20.3 |
|
Module power |
4.85W |
Application Scenarios
Select PVDM4-128 when a Cisco 4000 Series ISR design needs the 128-channel PVDM4 density tier and the bill of materials calls for a fourth-generation DSP module rather than a NIM-PVDM module.
Use this SKU for T1/E1 NIM designs where the DSP must sit on the supported voice WAN NIM path, because Cisco documents PVDM4 on T1/E1 NIMs for TDM voice services and media services.
Choose PVDM4-128 when PVDM4-64 is below the codec-channel requirement and PVDM4-256 would exceed the planned DSP density for the router or T1/E1 module slot.
Product Comparison
|
Parameter |
PVDM4-128 | |||
|---|---|---|---|---|
|
Product family |
Cisco PVDM4 voice DSP modules |
Cisco PVDM4 voice DSP modules |
Cisco PVDM4 voice DSP modules |
Cisco NIM-PVDM voice DSP modules |
|
Cisco description |
128-channel high-density voice DSP module |
64-channel high-density voice DSP module |
256-channel high-density voice DSP module |
NIM PVDM with 128-channel DSP |
|
Product type |
PVDM4 voice DSP module |
PVDM4 voice DSP module |
PVDM4 voice DSP module |
NIM-based voice DSP module |
|
Slot type |
On-board motherboard or T1/E1 module slot |
On-board motherboard or T1/E1 module slot |
On-board motherboard or T1/E1 module slot |
Network Interface Module slot |
|
Low-complexity channels |
128 |
64 |
256 |
128 |
|
Medium-complexity channels |
96 |
48 |
192 |
96 |
|
High-complexity channels |
64 |
32 |
128 |
64 |
|
TDM service support |
Supported when installed on a T1/E1 NIM |
Supported when installed on a T1/E1 NIM |
Supported when installed on a T1/E1 NIM |
Not supported for NIM-PVDM-X modules |
|
Minimum software listing |
IOS XE 3.10 / XE SD-WAN 17.3 / vManage 20.3 |
IOS XE 3.10 / XE SD-WAN 17.3 / vManage 20.3 |
IOS XE 3.10 / XE SD-WAN 17.3 / vManage 20.3 |
IOS XE 3.16.1 / XE SD-WAN 17.3 / vManage 20.3 |
|
Platform context |
Cisco 4000 Series ISR PVDM4 path except ISR 4461 motherboard slot |
Cisco 4000 Series ISR PVDM4 path except ISR 4461 motherboard slot |
Cisco 4000 Series ISR PVDM4 path except ISR 4461 motherboard slot |
Catalyst 8300 and ISR 4461 NIM-slot platforms |
- In a PVDM4-128 vs PVDM4-64 comparison, the difference is DSP density: PVDM4-128 doubles the listed low-, medium-, and high-complexity channel counts.
- The PVDM4-128 vs PVDM4-256 difference is capacity tier; PVDM4-256 provides twice the listed channel count in the same PVDM4 form-factor family.
- For a PVDM4-128 vs NIM-PVDM-128 comparison, the channel counts match, but the slot path and TDM service boundary are different.
- Buyers deciding which model to choose should match the codec channel count first, then confirm whether the design needs the PVDM4 motherboard or T1/E1 NIM path.
Selection Guide
1. Match the 128-channel PVDM4 tier
Choose PVDM4-128 when the deployment requires 128 low-complexity, 96 medium-complexity, or 64 high-complexity voice channels in the Cisco PVDM4 family.
2. Keep the slot path explicit
Specify this SKU only when the router design has a Cisco-documented motherboard PVDM4 position or a T1/E1 NIM that accepts a PVDM4 module.
3. Separate TDM and IP media service needs
Use the T1/E1 NIM placement for TDM voice service requirements; use the motherboard placement only for IP media services such as conferencing and transcoding.
4. Do not substitute the NIM-PVDM form factor
Select NIM-PVDM-128 instead only when the BOM requires a Network Interface Module slot DSP option for the Catalyst 8300 or ISR 4461 NIM-slot context.
Ordering Checklist
|
Review Area |
Required Confirmation |
Procurement Risk |
|---|---|---|
|
Exact SKU |
Confirm PVDM4-128 rather than PVDM4-64, PVDM4-256, or NIM-PVDM-128 |
Avoids ordering the wrong DSP density or form factor |
|
Router family |
Verify the target Cisco 4000 Series ISR and note that ISR 4461 has no motherboard PVDM4 slot |
Prevents assigning the module to an unsupported physical position |
|
Slot placement |
Confirm motherboard installation for IP media services or T1/E1 NIM installation for TDM voice services |
Prevents a TDM design from relying on the motherboard slot |
|
Codec capacity |
Match the voice design to 128 low-, 96 medium-, or 64 high-complexity channels |
Prevents under-sizing the DSP resource pool |
|
Software baseline |
Check IOS XE, XE SD-WAN, and vManage minimums for the router and module table |
Keeps the quote aligned with Cisco’s platform support listing |
|
License path |
Confirm Unified Communications Technology Package or current Smart Licensing requirements for the voice application |
Avoids treating DSP hardware as a complete voice feature entitlement |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Brand | Cisco | Product ID | PVDM4-128 |
| Product family | Cisco Packet Voice Digital Signal Processor Modules | Product type | PVDM4 voice DSP module |
| Cisco description | 128-channel high-density voice DSP module | Slot type | On-board motherboard or T1/E1 module slot |
| Supported platform family | Cisco 4000 Series ISRs except ISR 4461 for motherboard PVDM4 support | Low-complexity channels | 128 |
| Medium-complexity channels | 96 | High-complexity channels | 64 |
| TDM voice service path | Supported when installed on a T1/E1 NIM | Motherboard service path | IP media services such as conferencing and transcoding |
| Minimum software listing | IOS XE 3.10 / XE SD-WAN 17.3 / vManage 20.3 | Voice application licensing | Minimum Unified Communications Technology Package noted for voice applications |
| DSP technology | Multicore DSP technology | Interface | Integrated Services Card slot on motherboard or T1/E1 NIM |
| Operating temperature | 32 to 122 degrees F (0 to 50 degrees C) | Voltage | 3.3V |
| Current | 1.47A | Power | 4.85W |
| Weight | 0.08 lb (36 g) | Dimensions | 0.67 x 2.50 x 2.62 in. (1.7 x 5.1 x 6.7 cm) |
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