Transceivers & optics

Cisco QDD-400G-LR4-S 400GBASE-LR4 QSFP-DD Transceiver

Name: Cisco QDD-400G-LR4-S 400GBASE-LR4 QSFP-DD Transceiver
Brand: Cisco
SKU: QDD-400G-LR4-S

SKU QDD-400G-LR4-S · New

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Free US shipping over $2,500.00
Government Purchase Card (GPC) accepted
Authorized Cisco partner, genuine warrantied hardware
TAA-compliant & DoDIN APL procurement paths
No payment up front, we confirm stock & final total

Overview

The Cisco QDD-400G-LR4-S is a 400 Gigabit Ethernet QSFP-DD transceiver that reaches up to 10km over a duplex LC single-mode fiber pair using four wavelengths. It addresses long-reach 400G requirements such as data center interconnect, metro aggregation, and inter-building backbones where extended single-mode distance is essential. The module is hot-swappable, standards compliant, and supports digital diagnostics. Genuine Cisco hardware sourced through an authorized partner.

Highlights

400GBASE-LR4 over duplex single-mode fiber, LC connector, up to 10km
Four-wavelength PAM4 design for long-reach 400G spans
Hot-swappable QSFP-DD with digital optical monitoring
Genuine Cisco, authorized-partner sourced for warranty integrity
TAA-compliant procurement path and Government Purchase Card (GPC) accepted
Government Purchase Card (GPC) accepted

Cisco Cisco QDD-400G-LR4-S 400GBASE-LR4 QSFP-DD Transceiver datasheet & specifications

Optical

Standard: 400GBASE-LR4
Form factor: QSFP-DD
Connector: Duplex LC
Fiber: Single-mode (SMF)
Max reach: 10km

Operating

Data rate: 400 Gbps (4x 100G PAM4)
DOM: Yes

Frequently asked questions

How much does the Cisco QDD-400G-LR4-S 400GBASE-LR4 QSFP-DD Transceiver (QDD-400G-LR4-S) cost?

Pricing for the QDD-400G-LR4-S is available on request. Send a quick quote request and a Uniqcli specialist will confirm the current price, stock, and lead time, usually within one business day. Lower pricing is available for volume, GPC, and emergency-acquisition orders.

Is the QDD-400G-LR4-S TAA compliant and available for government and DoD buyers?

Yes. Uniqcli is an authorized Cisco partner and supports TAA-compliant, DoDIN APL-ready procurement of the QDD-400G-LR4-S for US federal, DoD, state, local, education, healthcare, and enterprise buyers. We accept the Government Purchase Card (GPC) and can support FAR-based urgent and emergency acquisitions.

Can I buy the QDD-400G-LR4-S as a single unit or in volume?

Both. Order a single QDD-400G-LR4-S through the cart, or ask about lower pricing for volume orders, Government Purchase Card (GPC) purchases, and emergency or urgent (FAR-based) acquisitions. There is no payment up front: we confirm availability and the final total before invoicing.

Where can I find the QDD-400G-LR4-S datasheet and specifications?

The official Cisco datasheet is available on this page (open the gated datasheet for the full PDF), and the Tech Specs section lists ports, power draw, dimensions, and licensing for the QDD-400G-LR4-S.