Replacement for 15305-S4.1-2-LC: Drop-In Alternatives We Stock
Looking for a replacement for the 15305-S4.1-2-LC (15305-S4.1-2-LC - Cisco 2-Port STM-4 Optical Service Module Service for ONS 15305)? 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 15305-S4.1-2-LC
| SKU | 15305-S4.1-2-LC |
|---|---|
| Product | 15305-S4.1-2-LC - Cisco 2-Port STM-4 Optical Service Module Service for ONS 15305 |
| Stock status | In Stock |
| Detail page | View 15305-S4.1-2-LC › |
Drop-in replacements for 15305-S4.1-2-LC
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.
ONS-SI-622-L2 - Cisco 622Mb/s OC-12/STM-4 Single-Mode Fiber 80km 1550nm Duplex LC Connector SFP Transceiver Module
SKU: ONS-SI-622-L2
Price: $188.13
ONS-XC-10G-53.3 - Cisco Single-Mode 10Gbps 10GBase-DWDM OC-192/STM-64 Fiber 80km 1553.33nm Duplex LC Connector XFP Transceiver Module
SKU: ONS-XC-10G-53.3
Price: $206.32
ONS-XC-10G-EP54.1 - Cisco 10Gbps 10GBase-DWDM OC-192/STM-64 Single-mode Fiber 50km 1554.13nm Duplex LC Connector XFP Transceiver Module
SKU: ONS-XC-10G-EP54.1
Price: $232.82
ONS-XC-10G-60.6 - Cisco 10Gb/s 10GBase-DWDM OC-192/STM-64 Single-mode Fiber 80km 1560.61nm LC Connector XFP Transceiver Module
SKU: ONS-XC-10G-60.6
Price: $249.39
ONS-XC-10G-58.9 - Cisco Single-Mode 10Gbps 10GBase-DWDM OC-192/STM-64 Fiber 80km 1558.98nm Duplex LC Connector XFP Transceiver Module
SKU: ONS-XC-10G-58.9
Price: $274.75
ONS-SE-622-1490 - Cisco Single-Mode 622Mbps OC-12/STM-4 622MBase-CWDM Fiber 100km 1490nm Duplex LC Connector SFP Transceiver Module
SKU: ONS-SE-622-1490
Price: $276.32
ONS-SI-622-I1-RF - Cisco 622Mb/s OC-12/STM-4 Single-Mode Fiber 15km 1310nm Duplex LC Connector SFP Transceiver Module
SKU: ONS-SI-622-I1-RF
Price: $281.70
ONS-XC10GEP33.4-RF - Cisco 10Gb/s 10GBase-DWDM OC-192/STM-64 Single-Mode Fiber 50km 1533.47nm Duplex LC Connector XFP Transceiver Module
SKU: ONS-XC10GEP33.4-RF
Price: $284.67
ONS-XC-10G-51.7 - Cisco Single-Mode 10Gbps 10GBase-DWDM OC-192/STM-64 Fiber 80km 1551.72nm Duplex LC Connector XFP Transceiver Module
SKU: ONS-XC-10G-51.7
Price: $324.71
ONS-SC-2G-59.7 - Cisco Single-Mode OC-48/STM-16 Fiber 80km 1559.79nm LC Connector DWDM SFP Transceiver Module
SKU: ONS-SC-2G-59.7
Price: $326.14
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.