QSFP-40G-SR-BD Transceiver Modules

QSFP stands for Quad Small Form-factor Pluggable, a compact, hot-swappable transceiver format used for high-density networking connections. It supports four data channels, enabling aggregate data rates such as 40 Gbps (4x10G) in QSFP+ modules, and is used across switches, routers, and servers in enterprise and data center environments.

The QSFP-40G-SR4 is a QSFP+ pluggable transceiver module supporting the 40GBASE-SR4 standard at a 40 Gbps data rate. It uses parallel multimode fiber with an MPO/MTP connector and is designed for short-range data center interconnects, typically supporting distances up to 100-150 meters depending on fiber grade.

The QSFP-40G-SR4 module uses an MPO/MTP-terminated multimode fiber cable (typically OM3 or OM4) with 8 fibers arranged in parallel, supporting four transmit and four receive channels for its 40GBASE-SR4 optical interface.

QSFP+ modules commonly support 40 Gbps data rates, such as 40GBASE-SR4 and 40GBASE-LR4, while the original QSFP standard supported lower rates. Today, 'QSFP' is often used interchangeably with QSFP+ when referring to 40G Ethernet transceivers used in data center and enterprise switching equipment.

The SR4 module uses multimode fiber for short-range links up to about 150 meters, while the LR4 module uses single-mode fiber with WDM technology to support long-range links up to 10 kilometers. LR4 modules are typically priced higher due to their more complex optical design and longer reach capability.

Yes, when sourced from a reputable supplier that performs thorough quality assurance testing. Terabit Systems tests every refurbished module through a 5-step QA process and backs units with a Juniper warranty and 1-year replacement or refund guarantee, ensuring reliable performance comparable to new equipment at a lower cost.