Aggregation Switch with Radio-over-Ethernet Mappers

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The introduction of the Broadcom® BCM56670 heralds a fundamental transformation in the design of mobile networking equipment. With built-in IEEE 1914.3 Radio-over-Ethernet (RoE) mappers, the BCM56670 is the first Ethernet switch in the market that performs CPRI/Ethernet interworking and allows direct connections to CPRI-based radios and baseband processors. 

The BCM56670, which inherits the technology and sophistication of Broadcom’s data center portfolio, is the ideal gateway between the legacy cellular world and tomorrow’s 5G network.


  • Integrated IEEE 1914.3 Radio-over-Ethernet (RoE) mappers with built-in de-jitter buffers
  • 64 SerDes: − 24x 25G dual-mode CPRI/ Ethernet − 2.5G to 25G CPRI − 1GbE to 100GbE − 16x 25-Gigabit Ethernet (1GbE to 100GbE) − 24x 10-Gigabit Ethernet (1GbE to 10GbE) 
  • Up to 800 Gb/s and 496M packets/second with 256B RoE packets 
  • IEEE 1588v2/SyncE solution with integrated telecom DPLL and nanosecond-scale time stamping 
  • IEEE 802.1 Qbu pre-emption 
  • Centralized, flow-based MACsec 
  • Per-AxC compression engines 
  • Structure-agnostic mapping mode to support carrier isolation over a shared infrastructure 
  • 42.5-mm x 42.5-mm FCBA package 


  • BTS line cards
  • Front-haul aggregation nodes
  • Base stations 

Lifecycle Status


Specification Value
Lifecycle Active
Distrib. Inventory No
SerDes / GPHY 40x 25G + 24x 10G
Package 1760 FCBGA (42.5×42.5mm)
Bandwidth 800Gb/s
Fabric NA
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