Replacement for UNITY-UM16-USR: Drop-In Alternatives We Stock
Looking for a replacement for the UNITY-UM16-USR (UNITY-UM16-USR - Cisco Unity Unified Messaging for 16-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-UM16-USR
| SKU | UNITY-UM16-USR |
|---|---|
| Product | UNITY-UM16-USR - Cisco Unity Unified Messaging for 16-session System License 1 Additional User |
| Stock status | In Stock |
| Detail page | View UNITY-UM16-USR › |
Drop-in replacements for UNITY-UM16-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.
SM-ES3G-16-P - Cisco System PoE 15-Ports 15 x 10/100Base-TX + 1 x 10/100/1000Base-T Layer 3 Managed FastEthernet Network Switch
SKU: SM-ES3G-16-P
Price: $274.75
MCS-7816-H3-CCX1 - HP / Cisco MCS 7825 X3050 Intel Celeron D 3.2GHz CPU 2GB RAM 320GB HDD (2x160GB) Rack-Mountable 1U Server System
SKU: MCS-7816-H3-CCX1
Price: $5,335.45
SFP-OC48-SR-RF - Cisco SFP-OC48-SR - Cisco 2.5Gb/s OC-48/STM-16 SR-1 Single-Mode Fiber 2km 1310nm Duplex LC Connector SFP Transceiver Module
SKU: SFP-OC48-SR-RF
Price: $113.36
MEM-4700M-16F - Cisco 16MB Kit (2 X 8MB) Flash Memory for Cisco 4500/4500-M/4700-M/4700
SKU: MEM-4700M-16F
Price: $116.33
MEM-47000M-16F - Cisco 16MB Kit (2 X 8MB) Flash Memory for Cisco 4500/4500-M/4700-M/4700
SKU: MEM-47000M-16F
Price: $116.33
MEM-4000M-4U16F - Cisco 16MB Kit (2 X 8MB) Flash Memory for Cisco 4000-M
SKU: MEM-4000M-4U16F
Price: $116.33
MEM470016F - Cisco 16MB Kit (2 X 8MB) Flash Memory for Cisco 4500/4500-M/4700/4700-M
SKU: MEM470016F
Price: $116.33
MEM-1X16F-DFB - Cisco 16MB Flash Memory for Cisco AS5100/AS5200 Router
SKU: MEM-1X16F-DFB
Price: $116.33
MEMC6KFLC16 - Cisco 16MB PCMCIA Flash Memory Card for Cisco Catalyst 6000/6500
SKU: MEMC6KFLC16
Price: $116.33
MEM-4500M-16F-APP - Cisco 16MB Kit (2 X 8MB) Flash Memory Card for Cisco 4500/4500-M/4700
SKU: MEM-4500M-16F-APP
Price: $116.33
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.