Features of the 40G QSFP+ BiDi
The 40GBase QSFP+ Bidi has two 20G channels that supports connections up to 100
meters on OM3 and up to 150 meters on OM4. It uses LC Duplex connector and the
wavelength is 850nm. It is compliant with the QSFP MSA.
• Supports 40G data rate
• 2 channels 850nm VCSEL transmitter
• Reach distance up to 100 meters with OM3
• Reach distance up to 150 meters with OM4
• LC Duplex Connector
• Temperature range: 0 to 70°C

Difference between the 40G QSFP+ BiDi and the 40G QSFP+ SR
Both, the 40G QSFP+ BiDi and the 40G QSFP+ SR reach distances up to 150 meters
over multi-mode fiber. The difference is that the QSFP+ BiDi uses LC connector and
the QSFP+ SR uses MPO connector. Knowing that all the 10G transceivers use LC
connector, it can make a difference when deciding to upgrade a network from 10G to
40G. Indeed, the LC connector of the 40G QSFP+ BiDi allows to reuse the existing
cables of a 10G network.