Credo hosted a demonstration of Linear Receive Optics (LRO), using its Credo Dove 850 DSP, along with the 51.2 Tbps Wistron DS-6183-64O 64-port 800GbE switch.
In an LRO transceiver, or Active Optical Cable (AOC), only the transmit path from the electrical input to the optical line side output includes a DSP for signal retiming and equalization.
All three 800G OSFP LRO modules provided by Credo partners for this demonstration seamlessly “plug and play” with the 51.2T Wistron switch, a tremendous benefit in mass deployment.
The Dove 850 is a unidirectional 8 x 112 Gb/s DSP purpose built for the LRO architecture. The Dove 850 DSP aims to address the inherent weakness of a Linear Pluggable Optics (LPO) implementation by facilitating IEEE compliant optical transmit signaling and easing the deployment burden on system operators by eliminating manual, per port tuning. The result is lower bit error rates, enhanced sensitivity, reduced performance variation, and improved resilience to different switch ASICs, PCB traces, optical components, and environmental conditions. Dove 850 allows transceiver vendors to optimize module cost by employing a variety of optics, including VCSELs, silicon photonics, EML or thin-film lithium niobate as dictated by the application requirements.
Wistron’s DS-6183-64O is a compact 2RU 64 port 800G OSFP Ethernet Switch, built with Broadcom Tomahawk 5 chip, providing high bandwidth, high throughput, and reliable solutions. Support up to 102.4Tbps of switching I/O bandwidth and non-blocking switching fabric, delivering wire-speed L2 and L3 packet forwarding capabilities on all ports for Low-latency data transmission and support for state-of-the-art instrumentation feature. With the advanced system integration technique, all OSFP ports on DS-6183-64O support up to 800GbE and can be configured as 2 x 400GbE and also support 18W output. For long-range DCI application, 8 OSFP ports of DS-6183-64O could even support 25W in each port. DS-6183-64O is loaded with ONIE (Open Network Install Environment), which supports the installation of compatible NOS (Network Operating System) software, like SONiC.
“Linear Receive Optics are pushing the industry forward. Credo is streamlining implementation for module vendors while addressing the need for improved energy efficiency across the data center,” said Anderson Chiu, General Manager of Networking Development, Enterprise and Networking Business Group of Wistron.
