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Vocom International
AI data center optics
Optical Transceivers for AI Clusters, 400G to 1.6T
OSFP and QSFP-DD modules from 1.6T down to 1G, low-loss MPO, MTP and LC patch cords, and InfiniBand and Ethernet switches, supplied together for GPU clusters from H100 to GB300. Sourced from a top-tier optical module maker, tested for compatibility and quoted within 24 hours.
For the passive fiber behind the modules, see data center fiber cabling.
AI cluster optics, supplied together
- 1.6T, 800G and 400G
- OSFP and QSFP-DD
- 200G down to 1G
- Low-loss MPO and LC
Need a different module or cord length? Send the part list and we will match it.
100+
Regions
99.9%
Uptime
25,000+
Clients
24/7
Support
What it is
In an AI cluster the fiber is passive. The transceiver is where light becomes data, and every GPU server, leaf and spine port needs one matched to its speed, form factor and reach, with a patch cord matched to the module. A 32-server B300 cluster runs 1.6T between switches, 800G to every GPU network card, 400G and 200G on the Ethernet side and 25G down to 1G for management. We supply the whole set, so the optics, cords and switches arrive as one order.
Speeds
1.6T, 800G, 400G, 200G, 100G, 25G, 10G and 1G
Form factors
OSFP and QSFP-DD for 400G to 1.6T
Fabrics
InfiniBand and Ethernet, including RoCEv2 GPU backends
Clusters supplied
H100, H200, B300 and GB300
Patch cords
MPO, MTP and LC, low insertion loss, custom lengths
Switches
InfiniBand and Ethernet, from the original vendors
Quality
Built to MSA and original-vendor specifications, full warranty service
Every speed in the cluster
From the 1.6T spine links down to the 1G out-of-band management ports, one supplier covers every port in the hall.
1G
10G
25G
100G
200G
400G
800G
1.6T
Browse individual products
Where each module sits
Our reference design for 32 NVIDIA B300 HGX servers: an InfiniBand compute fabric, with Ethernet for north-south traffic and management.
- 1.6T
- InfiniBand leaf to spine, between QM3400 switches
- 800G
- Leaf to every GPU server, eight ConnectX-8 network cards per server
- 400G
- North-south Ethernet switching and InfiniBand fabric management (UFM)
- 400G to 2x 200G
- Breakout to the BlueField-3 DPUs in each server
- 100G
- Ethernet core to the management switches
- 25G
- Management servers, dual-homed to both switches
- 10G and 1G
- Firewalls, the internet edge and BMC out-of-band
Clusters we have supplied
Optics, patch cords and switches for AI data halls in the US, Thailand and Taiwan, from H100 to GB300.
Denver, USA · 2025
H100 data hall
High-volume 400G and 800G modules with low-loss patch cords. 100% of links passed on-site link and interoperability tests.
Denver, USA · 2025
H200 data hall
800G and 400G modules, InfiniBand switches for a non-blocking fabric, low-loss patch cords, and test and inspection equipment.
Chonburi, Thailand · 2026
B300 data hall
Every module from 1.6T to 1G, all site-wide InfiniBand and Ethernet switches, and low-loss patch cords, delivered with cabling and system partners.
Don Mueang, Thailand · 2026
B300 data hall
Every module from 1.6T to 1G, all site-wide InfiniBand and Ethernet switches, and low-loss patch cords for error-free long links.
Guishan, Taiwan · 2026
GB300 data hall
1.6T and 800G modules for QM3400 switches and ConnectX-8 network cards, with low-latency cabling.
Why buy your optics through Vocom
One order for the whole cluster: modules, patch cords and switches, matched port by port.
Top-tier module maker: high-volume supply, qualified by leading cloud providers.
Built to spec: OSFP thermal design and dimensions follow MSA and original-vendor specifications.
Without the brand premium: comparable reliability, with full warranty service.
Cabling and setup partners: installation, fabric configuration and NCCL testing on turnkey builds.
Optical transceiver FAQ
What transceivers does an NVIDIA B300 cluster need?
In our 32-server reference design: 1.6T modules between the InfiniBand leaf and spine switches, 800G to the eight ConnectX-8 network cards in every server, 400G for north-south Ethernet and fabric management with 400G to 2x 200G breakouts for the BlueField-3 DPUs, 100G and 25G for management, and 10G and 1G at the edge and out-of-band. Send your node count and switch models and we will return the full bill of optics.
Do you supply 1.6T OSFP modules?
Yes. 1.6T and 800G OSFP modules are supplied for GB300 and B300 clusters, including QM3400 InfiniBand switches and ConnectX-8 network cards.
Are your modules compatible with NVIDIA InfiniBand and Ethernet switches?
They are built to MSA and original-vendor specifications, including heat-dissipating fins, pull-tab color and mechanical dimensions, and they have passed on-site link and interoperability tests in deployed clusters. Send your switch and network card models and we will confirm compatibility part by part.
What is the difference between OSFP and QSFP-DD?
Both are eight-lane form factors for 400G and 800G. OSFP is slightly larger, with more room to shed heat, and is the form factor used for 1.6T. QSFP-DD is backward compatible with QSFP28 cages and is common on Ethernet switches. The port on your switch or network card decides which one you need.
Why buy transceivers from Vocom instead of the switch vendor?
You get comparable transmission reliability without the brand premium, with full warranty service, and the modules, patch cords and switches come on one order matched port by port.
Do you supply the patch cords and switches as well?
Yes. Low-loss MPO, MTP and LC patch cords in custom lengths, and InfiniBand and Ethernet switches from the original vendors, supplied with the modules.
Can you install and configure the cluster network?
Yes, through our partners. Specialist cabling contractors handle hot and cold aisle and cable-tray installation, labeling, bend-radius control and fiber loss testing. System configuration partners handle InfiniBand fabric setup, RoCEv2 congestion control tuning and NCCL performance testing.
What is the lead time and warranty on transceivers?
Both are confirmed with your quote, and lead times are typically in line with our fiber orders. Send the part list to our sales team and we will confirm lead time and warranty for each module.
How fast can I get a quote for optics?
Within 24 hours. Send the GPU platform, node count, switch and network card models, and any patch cord lengths you already know.
Need Optics for a Specific Cluster?
Send the GPU platform, node count and switch models. We will return a matched list of modules, patch cords and switches, with a quote within 24 hours.
Request a Quote
NVIDIA, InfiniBand, ConnectX, BlueField and Quantum are trademarks of their respective owners. Vocom is not affiliated with or endorsed by NVIDIA. Modules are supplied through Vocom's manufacturing partner.
