PRODUCT NEWS
PacketLight extends 400G ultra-long haul reach to 4,000 kilometres
PacketLight Networks, a provider of DWDM and OTN optical transport solutions, has extended the capabilities of its PL-4000T 1.6T 4x400G Transponder and PL-4000G 4.8T 12x400G Transponder solutions, enabling 400G transport across ultra-long- haul networks up to 4,000 kilometres. As global data traffic continues to rise exponentially and the need to support AI applications grows, network operators face increasing demand to build and interconnect existing networks across thousands of kilometres without sacrificing capacity, efficiency, or cost-effectiveness. PacketLight’s solutions for 4,000-kilometre reach are ideal for long- distance backbones and
transcontinental carrier networks. The PL-4000T and PL- 4000G support ultra-long- haul capabilities via a simple software upgrade. Powered by an 800G DSP chip, these systems feature advanced dual-polarization QPSK with probabilistic constellation shaping (PCS) to optimize spectral efficiency and resilience against noise and
nonlinearities. Extensive dispersion compensation, high receiver sensitivity and advanced soft-decision FEC (SD-FEC)help maintain robust performance across long and challenging fibre spans. PacketLight’s 400G transponders support these capabilities through advanced coherent optics, high-output amplifiers,
and optimized receiver design, delivering top performance without hidden license fees. These features help operators extend their networks across thousands of kilometres while maintaining optimal performance, and also improve OSNR in metro network links to support 400G wavelengths over challenging routes.
Broadcom ships Jericho4, enabling distributed AI computing across data centres
Broadcom Inc., a semiconductor and infrastructure software
XPUs across multiple facilities — each provisioned with tens to hundreds of megawatts of power — requires a new class of router, optimized for very high-bandwidth, secure and lossless transport across regional distances. A single Jericho4 system scales to 36,000 HyperPorts, each operating at 3.2 Tb/s, with deep buffering, line-rate MACsec, and RoCE transport over 100km+ distances. Broadcom’s 3.2T HyperPort technology consolidates four 800GE links into a single logical port — eliminating load balancing inefficiencies, boosting utilization by up to 70%, and streamlining traffic flow across large fabrics. Thanks to deep buffering and intelligent congestion control, Jericho4 ensures lossless RoCE across 100km+ enabling truly distributed AI infrastructure
unconstrained by power and space limitations at a single location.
solutions company, announced it is now shipping the Jericho4 ethernet fabric router — a purpose-built platform for the next generation of distributed AI infrastructure. Designed to interconnect over one million XPUs across multiple data centres, Jericho4 breaks through traditional scaling limits with high bandwidth, security, and lossless performance. With the Tomahawk 6, Tomahawk Ultra and Jericho4, Broadcom offers a complete networking portfolio for HPC and AI. As AI models grow in size and complexity, the infrastructure requirements exceed the power and physical limits of a single data centre. Distributing
Jericho4 supports MACsec encryption on every port at full speed to protect data moving between data centres, delivering strong security without compromising performance — even at the highest traffic loads. Manufactured on a 3nm process, Jericho4 features Broadcom’s advanced 200G PAM4 SerDes with industry-leading reach. This eliminates the need for extra components like retimers, resulting in lower power usage, reduced cost, and higher system reliability. Jericho4 is fully compliant
with specifications developed by the Ultra Ethernet Consortium (UEC), ensuring interoperability across open, standards- based Ethernet AI fabrics. This allows seamless integration with a broad ecosystem of UEC- compliant NICs, switches, and software stacks.
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| ISSUE 42 | Q3 2025
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