Allied Telesis AT-QSFPSR4LC – TAA 40G QSFP+ SR4 Multimode LC Transceiver

Product Overview

The Allied Telesis AT-QSFPSR4LC is a TAA-compliant 40G QSFP+ SR4 multimode LC transceiver engineered for high-density data center and enterprise core interconnects. Operating at 850nm over OM3/OM4 multimode fiber, this Allied Telesis 40G QSFP+ SR4 multimode LC transceiver TAA delivers 40 Gigabit Ethernet connectivity up to 100–150 meters using parallel 8-fiber MPO/MTP cabling with an LC breakout for flexible deployment scenarios. As a hot-swappable, MSA-compliant module, it integrates directly into Allied Telesis switches and routers with QSFP+ uplink slots. Purchase the AT-QSFPSR4LC from Creation Networks for competitive pricing and authorized Allied Telesis support.

Product Description

The AT-QSFPSR4LC is part of the Allied Telesis QSFP Series, designed to deliver 40 Gigabit Ethernet performance in a compact, hot-swappable form factor ideal for data center top-of-rack, aggregation, and backbone switching. The SR4 designation indicates a parallel 4-lane architecture, with each lane transmitting at 10 Gbps over 850nm multimode optical fiber for a combined 40 Gbps aggregate throughput. Using an LC duplex connector and a parallel 8-fiber ribbon breakout, this transceiver supports short-reach multimode links in the 100–150 meter range over OM3 and OM4 fiber. The module is fully compliant with the 40GbE IEEE 802.3ba standard and the industry-standard SFF-8436 QSFP+ MSA specification, ensuring interoperability with third-party equipment that meets these standards. Digital Diagnostics Monitoring (DDM) support enables real-time monitoring of optical power levels, temperature, and transceiver health via the host switch, simplifying troubleshooting in high-density installations. TAA compliance makes this module eligible for U.S. government and federal agency procurement. RoHS compliance confirms environmentally responsible manufacturing. The hot-swappable design allows module replacement without network downtime, reducing maintenance windows in production environments. The AT-QSFPSR4LC is compatible with all Allied Telesis devices equipped with QSFP+ uplink ports.

Key Features

• TAA Compliant — Eligible for U.S. federal, defense, and government procurement projects.
• 40GbE IEEE 802.3ba Compliant — Meets the industry standard for 40 Gigabit Ethernet optical interfaces.
• SR4 Parallel 4-Lane Architecture — Four 10G lanes over 850nm multimode fiber for 40 Gbps aggregate throughput.
• 100–150m Reach — Supports OM3 (100m) and OM4 (150m) multimode fiber runs in data center environments.
• LC Connector — Industry-standard duplex LC interface for compatibility with existing fiber plant infrastructure.
• Hot-Swappable — Insert or remove without powering down the host switch or router.
• Digital Diagnostics Monitoring (DDM) — Real-time visibility into optical power, temperature, and module health.
• SFF-8436 MSA Compliant — Guarantees interoperability with standards-compliant 40G network equipment.
• RoHS Compliant — Manufactured to meet EU RoHS environmental standards.
• High Port Density — QSFP+ form factor maximizes 40G port count in data center switches.

Typical Applications

• Data center top-of-rack to aggregation layer 40GbE uplinks
• Enterprise core switching and distribution layer interconnects
• High-density 10GbE server aggregation using QSFP+ breakout cables
• Storage area network (SAN) high-speed interconnects
• Telecom and service provider routing and switching platforms
• U.S. federal and government data center projects requiring TAA-compliant optics

Technical Specifications

Frequently Asked Questions

Q: What fiber type and distance does the AT-QSFPSR4LC support?

The AT-QSFPSR4LC supports OM3 multimode fiber up to 100 meters and OM4 multimode fiber up to 150 meters, operating at 850nm across four parallel 10G lanes.

Q: Is the AT-QSFPSR4LC TAA compliant for U.S. government procurement?

Yes. This transceiver is TAA compliant and is suitable for U.S. federal, defense, and government network infrastructure projects that mandate Trade Agreements Act compliance.

Q: What connector type does this transceiver use?

The AT-QSFPSR4LC uses an LC duplex connector. The SR4 parallel fiber architecture typically uses an 8-fiber ribbon with an MTP/MPO-to-LC breakout harness to connect to the LC port.

Q: Is the AT-QSFPSR4LC compatible with non-Allied Telesis switches?

The module is MSA compliant (SFF-8436) and IEEE 802.3ba compliant, meaning it can operate in any standards-compliant 40GbE QSFP+ port. However, Allied Telesis guarantees full support only when used in Allied Telesis hardware.

Q: Does this transceiver support Digital Diagnostics Monitoring (DDM)?

Yes. DDM allows the host switch to read real-time optical power levels, temperature, supply voltage, and bias current from the module, simplifying fault diagnosis and preventive maintenance.

Q: Can I use the AT-QSFPSR4LC as a 4x10G breakout?

Yes. Using a QSFP+ to 4x SFP+ breakout cable, each of the four SR4 lanes can connect to a separate 10GbE SFP+ port, enabling cost-effective high-density 10G server connectivity from a single 40G port.

Q: Where can I purchase the AT-QSFPSR4LC?

The AT-QSFPSR4LC is available from Creation Networks at https://creationnetworks.net. Creation Networks is an authorized Allied Telesis reseller with competitive pricing and technical expertise.