The Calix 100-01510 100-01511 Ciena XCVR-40V55 160-9104-900 XCVR-S40V55 Cyan 280-0276-00 10GBASE-ER SFP+ transceiver is a high-quality and reliable product offered by GBoptical. This transceiver module is designed for long-range optical communication applications, making it suitable for various networking needs.