Q9G82A-BCC | Aruba Compatible 40GB Single-Mode ER4 Transceiver - 40km (40GBASE-ER4)

Q: Will this work in place of the Aruba Q9G82A?
A: Yes. This transceiver is electrically and optically compatible with the Q9G82A specification. It meets IEEE 802.3ba 40GBASE-ER4 and QSFP+ MSA standards, matching the form factor, data rate, wavelength plan, and reach of the reference module. It provides plug-and-play operation in Aruba switches and routers with QSFP+ ports.

Q: Which Aruba platforms support this transceiver?
A: This transceiver is compatible with Aruba switches and routers that provide QSFP+ 40G ports and support 40GBASE-ER4 interfaces. Compatibility depends on the platform supporting IEEE 802.3ba on QSFP+ ports rather than specific model numbers. Consult your platform documentation to confirm 40GBASE-ER4 support on the target port.

Q: What fibre type and quality is required for 40km reach?
A: This transceiver requires G.652 single-mode fibre and duplex LC/UPC connectors. Reaching the full 40km distance depends on available link budget. The IEEE 802.3ba standard specifies a minimum link budget for ER4; actual reach will vary based on connector loss, splice loss, fibre attenuation, and patch panel quality. Links beyond 30km may require engineered link budgets per IEEE 802.3 guidelines.

Q: How do the four CWDM wavelengths work together in this module?
A: The transceiver splits the 40 Gbps electrical signal into four independent 10.3125 Gbps lanes. Each lane modulates a separate CWDM wavelength (1271nm, 1291nm, 1311nm, 1331nm). An internal multiplexer combines these onto a single transmit fibre, while a demultiplexer on the receive side separates the incoming wavelengths back into four electrical lanes. This architecture delivers 40 Gbps aggregate throughput over a duplex fibre pair.

Q: Can I access per-lane diagnostic data or only aggregate module diagnostics?
A: The QSFP+ MSA DOM implementation provides per-channel monitoring. You can retrieve transmit and receive optical power for each of the four lanes independently, in addition to module-level parameters such as temperature, supply voltage, and per-lane bias current. This granularity is useful for troubleshooting asymmetric link issues or identifying degraded lanes before complete link failure.