John Ulm

Engineering Fellow, Broadband Systems


John’s three decades in the Broadband industry began as architect and MAC developer at LANcity, pioneering the industry’s first cable modems. He was a primary author for the Cable Industry’s DOCSIS 1.0 and 1.1 specifications. He also was senior technical consultant to Broadband industry with YAS Corp.

John’s recent research includes:

  • Next generation HFC distributed access architectures
    • including Remote PHY and Remote MACPHY
  • FTTx migration strategies for HFC: Fiber Deep N+0, FTTLA, FTTC & FTTH
  • DOCSIS 3.1 and its futures: Full Duplex (FDX) & Extended Spectrum
  • Network capacity modeling
  • IP Video solutions featuring multicast- ABR

John holds a BSEE and MSEE from RPI and has a multitude of papers and patents to his name.