Replacement for UNITY-UM4-USR: Drop-In Alternatives We Stock
Looking for a replacement for the UNITY-UM4-USR (UNITY-UM4-USR - Cisco Unity Unified Messaging for 4-session System License 1 Additional User)? Pro Disk Network ships Cisco drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the UNITY-UM4-USR
| SKU | UNITY-UM4-USR |
|---|---|
| Product | UNITY-UM4-USR - Cisco Unity Unified Messaging for 4-session System License 1 Additional User |
| Stock status | In Stock |
| Detail page | View UNITY-UM4-USR › |
Drop-in replacements for UNITY-UM4-USR
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
SFP-10G-USR - Cisco Multi-mode 10Gbps Fiber 150m 850nm Duplex LC Connector SFP+ Transceiver Module
SKU: SFP-10G-USR
Price: $107.54
CP-3905 - Cisco Systems Cisco Unified Sip Phone 3905 C harcoal Standard Handset
SKU: CP-3905
Price: $233.38
CP-PWR-7925G-NA - Cisco Unified Wireless IP Phone 7925G Power Supply Power Adapter
SKU: CP-PWR-7925G-NA
Price: $82.42
MEMUC500-128CF - Cisco 128MB CompactFlash (CF) Memory Card Memory for Unified 500 Series
SKU: MEMUC500-128CF
Price: $116.33
MEMUC500-128CF-APP - Cisco 128MB CompactFlash (CF) Memory Card Memory for Unified 500 Series
SKU: MEMUC500-128CF-APP
Price: $116.33
Cisco CAB-AC2UK AC Standard Power Cord for Unified Wireless IP Phone 7920
SKU: CAB-AC2UK
Price: $139.41
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.