Arista QSFP-40G-LR4-Arista | 40G QSFP+ Transceiver, Single-Mode, 10km, LC

Q: What fiber type and distance does the QSFP-40G-LR4 support?
A: This transceiver supports single-mode fiber (SMF) with a maximum reach of 10 km, making it ideal for campus backbones and inter-building data center links.

Q: Is this transceiver compatible with other vendors' 40GBASE-LR4 modules?
A: Yes, the QSFP-40G-LR4 is fully compliant with IEEE 802.3ba 40GBASE-LR4 standard and will interoperate with any vendor's 40GBASE-LR4 transceivers regardless of form factor or manufacturer.

Q: Can the QSFP-40G-LR4 be split into 4×10G connections?
A: No, the 40GBASE-LR4 uses wavelength division multiplexing (4 CWDM lambdas) over duplex fiber and cannot be split into separate 10G connections without complex optical demultiplexing hardware.

Q: Does this module support Digital Diagnostics Monitoring (DOM)?
A: Yes, the transceiver provides real-time monitoring of optical output power, receive power, temperature, transmit bias current, and supply voltage via the I2C interface per QSFP+ MSA specifications.

Q: What are the typical applications for this transceiver?
A: Common use cases include data center spine-leaf architectures, high-performance computing networks, enterprise core and distribution layers, and any application requiring 40G connectivity over medium distances up to 10 km.