Replacement for CISCO2520: Drop-In Alternatives We Stock
Looking for a replacement for the CISCO2520 (CISCO2520 - Cisco 2520 Router 1 x 10Base-T, 4 x Serial, 1 x ISDN Router)? 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 CISCO2520
| SKU | CISCO2520 |
|---|---|
| Product | CISCO2520 - Cisco 2520 Router 1 x 10Base-T, 4 x Serial, 1 x ISDN Router |
| Stock status | In Stock |
| Detail page | View CISCO2520 › |
Drop-in replacements for CISCO2520
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.
NM-1CT1 - Cisco Channelized T1/ISDN-PRI Network Module 1 x Channelized T1/ISDN PRI WAN Network Module
SKU: NM-1CT1
Price: $150.71
CISCO878-SEC-K9 - Cisco 878 G.SHDSL 4 x 10/100Base-TX LAN + 1 x WAN + 1 x ISDN BRI (S/T) WAN Integrated Services Router
SKU: CISCO878-SEC-K9
Price: $250.53
Cisco HWIC-4T/E1 4-Port Serial High-Speed 4 x Synchronous /Asynchronous Serial WAN Interface Card
SKU: HWIC-4T-E1
Price: $326.14
10-2520-01 - Cisco 4Gbps 4GBase-DWDM Fibre Channel Single-mode Fiber 80km 1546.12nm LC Connector SFP Transceiver Module
SKU: 10-2520-01
Price: $4,234.61
Cisco 8-port Asynchronous/Synchronous Serial GRWIC for the Cisco 2010 Connected Grid Router
SKU: GRWIC-8A-S-232
Price: $1,540.00
WIC-1B-U-V2 - Cisco Sinlge Port ISDN BRI U High-Speed WAN Interface Card
SKU: WIC-1B-U-V2
Price: $99.58
NM-2CT1-CSU - Cisco 2-Port Channelized T1 ISDN PRI With CSU Network Module
SKU: NM-2CT1-CSU
Price: $150.71
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.