Replacement for PA-4R-DTR: Drop-In Alternatives We Stock
Looking for a replacement for the PA-4R-DTR (PA-4R-DTR - Cisco 4-Port Dedicated Half Duplex Token Ring Adapter)? 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 PA-4R-DTR
| SKU | PA-4R-DTR |
|---|---|
| Product | PA-4R-DTR - Cisco 4-Port Dedicated Half Duplex Token Ring Adapter |
| Current price | $1,048.67 |
| Stock status | In Stock |
| Detail page | View PA-4R-DTR › |
Drop-in replacements for PA-4R-DTR
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-1FE1R2W - Cisco Single Port 10/100 Token Ring 2 WIC Slots Network Module
SKU: NM-1FE1R2W
Price: $324.71
Cisco Catalyst WS-X4908-10GE 4900M 8 x Ports 10Base-T Gigabit Half Expansion Module Spare
SKU: WS-X4908-10GE
Price: $240.89
ASA5585-SEPTUM - Cisco ASA 5585 Slot Divider for Half-slot IO Modules
SKU: ASA5585-SEPTUM
Price: $405.26
Cisco Catalyst WS-X4908-10G-RJ45 4900M 8 x Ports 10Base-T Gigabit Half Expansion Module Spare
SKU: WS-X4908-10G-RJ45
Price: $2,220.09
Cisco PA-F/FD-MM 1-Port FDDI Full Duplex Multimode Adapter for 7200 / 7500
SKU: PA-F-FD-MM
Price: $104.62
AG642A - HP Cisco 9124E 24-Port Blade System C-Class Fabric Switch HP Cisco 9124E 24-Port Blade System C-Class Fabric Switch
SKU: AG642A
Price: $273.91
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
Cisco SFP-FCGE-L/CISCO 1Gbps 1000Base-LX/LH Single-Mode Fiber 10km 1310nm Duplex LC Connector SFP Transceiver Module
SKU: SFP-FCGE-L-CISCO
Price: $168.78
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.