Q: Will this work in place of the Aruba JH232A?
A: Yes. The JH232A-BCC is plug-and-play compatible with the Aruba JH232A. Both share the same QSFP+ form factor, IEEE 802.3ba 40GBASE-LR4 compliance, 40 Gbps data rate, 1310nm CWDM wavelengths, and 10km single-mode reach. The module will be recognised by Aruba platforms without configuration changes.

Q: Which Aruba platforms support this transceiver?
A: This transceiver is compatible with Aruba switches and routers featuring QSFP+ ports that support 40GBASE-LR4, including the 2930M series, 8320 series, and other platforms with 40G QSFP+ interfaces. Any Aruba device with a QSFP+ slot expecting IEEE 802.3ba 40GBASE-LR4 will accept this module.

Q: What fibre type and quality is required for 10km reach?
A: This transceiver is designed for standard G.652 single-mode fibre and requires duplex LC connectivity. The 10km reach assumes typical fibre attenuation of approximately 0.4 dB/km and the module's minimum 9.7 dB optical budget. Lower-quality or higher-loss fibre, dirty connectors, or additional splice points will reduce effective reach.

Q: How does the four-lane CWDM architecture affect link establishment?
A: The module transmits and receives across four independent 10.3125 Gbps lanes simultaneously, each on a distinct CWDM wavelength (1271/1291/1311/1331nm). All four lanes must achieve link for the 40G interface to come up. If DOM shows one lane with low receive power or high bit errors, the entire 40G link will fail or flap, even if three lanes are healthy.

Q: Can I use this transceiver in a 100G QSFP28 port?
A: No. QSFP28 ports are mechanically compatible but electrically designed for 100G signalling (4 x 25 Gbps lanes). This 40G QSFP+ module uses 4 x 10.3125 Gbps lanes and will not negotiate or establish a link in a QSFP28 slot expecting 100GBASE operation. Use only in native QSFP+ 40G ports.