part number TN-SFP-OC3S8-C31 identifies the TN-SFP-OC3S8-C31 - Transition 100Mbps CWDM SFP 100Base-FX/0C-3 LC Connector Single-mode 80km 1310nm Transceiver Module, an enterprise-grade Transceiver unit appropriate for data-center, server-room, and workstation deployment. Technical specifications include wavelength of 1310 nm, range of 80 km. Typical use cases include enterprise LAN core-distribution-access architecture, hyperconverged cluster east-west traffic, SAN fabric uplinks, and replacement of EOL/EOSL networking infrastructure under existing OEM warranty contracts. Pro Disk Network sources the TN-SFP-OC3S8-C31 through reputable distribution channels and applies a verification check against the OEM compatibility matrix before each unit is added to active inventory. Each unit ships from a US fulfillment hub (Hillsboro OR, Atlanta GA, or Phoenix AZ) with same-day dispatch on in-stock orders before 3pm ET. 90-day Pro Disk Network functional warranty included; free US ground shipping on orders over $150.
The TN-SFP-OC3S8-C31 is a enterprise-grade transceiver component with wavelength 1310 nm, range 80 km. Pro Disk Network sells the TN-SFP-OC3S8-C31 for $1,476.72 with same-day US shipping and a 30-day return guarantee.
Reviewed By
Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the TN-SFP-OC3S8-C31 are shown on this page.
Trust Signals
US-based LLC — 7345 W Sand Lake Rd, STE 210, Office 3208, Orlando, FL 32819
Same-Day US Shipping — orders before 3pm ET ship today via UPS
30-Day Returns — pre-paid label on DOA and defective items
Quick Answer: Is the TN-SFP-OC3S8-C31 compatible with my switch?
Pro Disk Network validates every TN-SFP-OC3S8-C31 against the target switch's published compatibility matrix before shipment. If you let us know your switch model and firmware version, we will confirm fitment and code the module appropriately (Cisco-coded, Juniper-coded, HPE-coded, etc.) at no extra charge.
How fast does the TN-SFP-OC3S8-C31 ship?
If in stock, the TN-SFP-OC3S8-C31 ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
The TN-SFP-OC3S8-C31 is deployed by US enterprises, MSPs, government, and education customers across multiple infrastructure scenarios. Below are the most common deployment patterns Pro Disk Network sees in real-world orders.
Spine-Leaf Fabric — Top-of-rack 25G/100G aggregation between leaf and spine switches. Match speed and form factor across both endpoints.
Server Uplink — 10G/25G server-to-leaf uplink — pair with matching DAC or AOC at the host NIC to avoid optic mismatch.
DCI (Data Center Interconnect) — Inter-DC routing or aggregation. LR4/LR8 transceivers for 10–80 km, ER4 for 40 km, ZR4 for coherent long-haul.
Campus Distribution — Catalyst-class campus distribution between IDF and MDF closets. PoE+ where wireless APs and IP phones share infrastructure.
What is the TN-SFP-OC3S8-C31?
The TN-SFP-OC3S8-C31 is a network interface module with wavelength 1310 nm and range 80 km, manufactured for enterprise IT deployments. Pro Disk Network ships this part new and certified-refurbished from our US warehouse with same-day dispatch on orders placed before 3 PM ET, backed by a 30-day return guarantee.
Pros & Cons of TN-SFP-OC3S8-C31
Pros
Same-day US shipping cuts deployment downtime
Cons
Refurbished switches may show minor rack-rail wear
Power supplies sold separately on certain SKUs
Long-haul ZR4/CFP4 modules subject to export-control screening
Frequently Asked Questions about TN-SFP-OC3S8-C31
Is the TN-SFP-OC3S8-C31 a genuine part?
Yes. Pro Disk Network sources every TN-SFP-OC3S8-C31 as factory-original inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
Is the TN-SFP-OC3S8-C31 compatible with my switch?
Pro Disk Network validates every TN-SFP-OC3S8-C31 against the target switch's published compatibility matrix before shipment. If you let us know your switch model and firmware version, we will confirm fitment and code the module appropriately (Cisco-coded, Juniper-coded, HPE-coded, etc.) at no extra charge.
How fast does the TN-SFP-OC3S8-C31 ship?
If in stock, the TN-SFP-OC3S8-C31 ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
What is the warranty on the TN-SFP-OC3S8-C31?
New TN-SFP-OC3S8-C31 units carry the full manufacturer warranty (typically 1 to 5 years depending on product line). Refurbished and bulk-OEM units include a Pro Disk Network advance-replacement warranty (90 days refurbished). DOA replacement is free within 30 days of receipt.
Do you offer bulk pricing for the TN-SFP-OC3S8-C31?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Optic Coding, Vendor Lock-In, and Multi-Vendor Compatibility
Networking optics — SFP, SFP+, QSFP+, QSFP28 — are physically interoperable across vendors but logically restricted by firmware coding. The TN-SFP-OC3S8-C31 is coded for a specific vendor family at our factory step before shipping, which preserves the OEM warranty workflow and allows the optic to be recognised without ‘service unsupported-transceiver’ CLI overrides. Mixing third-party optics with same-vendor optics in the same chassis is safe; mixing across vendor codings sometimes triggers warnings in the switch log.
Bandwidth Sizing for Spine-Leaf, EVPN-VXLAN, and Hyperconverged Storage
For EVPN-VXLAN overlays, the TN-SFP-OC3S8-C31 carries the underlay tunnels in addition to the workload traffic. Plan for VXLAN encapsulation overhead (50 bytes) plus MTU headroom; set the underlay MTU to 9216 (jumbo frames) and the overlay MTU to 9000. Make sure both the TN-SFP-OC3S8-C31 and the connected NICs support jumbo frames — some older NICs cap at 9000-byte payloads even when jumbo-enabled.