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Broadcom.For a list of all currently documented Broadcom chipsets with specifications, see
8x4 Cable Modem plus N450 Wi-Fi Router
8x4 DOCSIS 3.0 cable modem
- 8 downstream channels for speeds up to 343 Mbps
- 4 upstream channels for speeds up to 123 Mbps
This datasheet lists the core chipset as a Broadcom BCM3383G.